BOP lx (2)

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Customer Name

Rig Name

Sales Order Number

Reference Reference Description

Shaffer 71/16"–5,000 psi LXT Ram BOPThis document contains proprietary and confidential information which belongs to National Oilwell Varco; it is loaned for limited purposes only and remains the property of National Oilwell Varco. Reproduction, in whole or in part; or use of this design or distribution of this information to others is not permitted without the express written consent of National Oilwell Varco. This document is to be returned to National Oilwell Varco upon request and in any event upon completion of the use for which it was loaned.© National Oilwell Varco

National Oilwell Varco12950 West Little YorkHouston, TX 77041Phone: 713-937-5000Fax: 713-856-4138

Document Number Rev.

29100155 D

User’s Manual

Shaffer® 71/16"–5,000 psi

LXT Ram Blowout Preventer

Revision History

D 12-16-2009 Update graphics and technical corrections SF

C 01-09-2009 Update Chapter 3 and 4 BB

B 23-04-2009 Update graphics SF RH RH

A 09-02-2006 Issued for implementation CAN

Rev Date (dd.mm.yyyy) Reason for issue Prepared Checked Approved

Change Description

Revision Change Description

A First issue

B Updated various graphics using Pro-E models and made minor corrections to parts tables for single BOP.

C Update lock bar maintenance procedures.

D Updated various graphics using Pro-E models and made few corrections to chapters.

Table of Contents

LXT Ram Blowout PreventerRevision D

Page iii of iv

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Chapter 1: General InformationConventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Notes, Cautions, and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Safety Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Personnel Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2General System Safety Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Replacing Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3Proper Use of Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Equipment Repairs or Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Hydraulic Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Welding and Cutting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Chapter 2: IntroductionGeneral Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1BOP Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Door Locking System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4Hydraulic Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Chapter 3: Installation and OperationPreinstallation Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Condition of BOP is Unknown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2BOP Maintained on Scheduled Maintenance Program . . . . . . . . . . . . . . . . . . . . 3-2

Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Hydraulic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Hydraulic Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9Closing and Opening the Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10Manual Locking the Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12Unlocking Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12Opening Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12Closing Doors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Chapter 4: MaintenancePreventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1When to Call a Service Representative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1Daily Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3Monthly Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3Three-Month Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4Yearly Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8Three-Year to Five-Year Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

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Page iv of iv

Pressure Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9Field Wellbore Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9Hydraulic Pressure Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15Corrective Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16

Door Seal Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16Emergency Ram Shaft Packing Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17Ram Assembly Removal and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19Changing Pipe and Blind Ram Rubbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24Offset Rams for Dual Completions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24Aluminum Drill Pipe Rams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25

Storing the LXT BOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25LXT BOP Data Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25Cleaning and Storage of the LXT BOP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25

Chapter 5: Specifications and Parts ListsCustomer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Ordering Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Recommended Spare Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1Exploded Views and Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

Handwheel Assembly (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12

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Page 1-1 of 4

General Information

ConventionsThis manual is intended for use by field engineering, installation, operation, and repair personnel. Every effort has been made to ensure the accuracy of the information contained herein. National Oilwell Varco (NOV), will not be held liable for errors in this material, or for consequences arising from misuse of this material.

Notes, Cautions, and WarningsNotes, cautions, and warnings provide readers with additional information, and to advise the reader to take specific action to protect personnel from potential injury or lethal conditions. They may also inform the reader of actions necessary to prevent equipment damage. Please pay close attention to these advisories.

Note:

Caution:

Warning:

iiiThe note symbol indicates that additional information is provided about the current topic.

The caution symbol indicates that potential damage to equipment, or injury to personnel exists. Follow instructions explicitly. Extreme care should be taken when performing operations or procedures preceded by this caution symbol.

WarningWarning

The warning symbol indicates a definite risk of equipment damage or danger to personnel. Failure to follow safe work procedures could result in serious or fatal injury to personnel, significant equipment damage, or extended rig down time.

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General Information1LXT Ram Blowout Preventer

Revision DPage 1-2 of 4

IllustrationsIllustrations (figures) provide a typical and graphical representation of equipment, it’s components or screen snapshots for use in identifying parts, establishing nomenclature or calling out notes and procedures. Illustrations may or may not show all current aspects of the equipment nor be drawn to scale. Illustrations will not reflect any changes made after publication.

For component information specific to the product purchased, see the technical drawings included with your National Oilwell Varco documentation.

Safety RequirementsThe National Oilwell Varco equipment is installed and operated in a controlled drilling rig environment involving hazardous situations. Proper maintenance is important for safe and reliable operation. Procedures outlined in the equipment manuals are the recommended methods of performing operations and maintenance.

Personnel TrainingAll personnel performing installation, operations, repair, or maintenance procedures on the equipment, or those in the vicinity of the equipment, should be trained on rig safety, tool operation, and maintenance to ensure their safety.

Contact the National Oilwell Varco training department for more information about equipment operation and maintenance training.

Recommended ToolsService operations may require the use of tools designed specifically for the purpose described. The equipment manufacturer recommends that only those tools specified be used when stated. Ensure that personnel and equipment safety are not jeopardized when following service procedures and that personnel are not using tools that were not specifically recommended by the manufacturer.

To avoid injury to personnel or equipment damage, carefully observe requirements outlined in this section.

Personnel should wear protective gear during installation, maintenance, and certain operations.

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LXT Ram Blowout PreventerRevision DPage 1-3 of 4

General Information 1

General System Safety PracticesThe equipment discussed in this manual may require or contain one or more utilities such as electrical, hydraulic, pneumatic, or cooling water.

Isolate energy sources before beginning work.

Avoid performing maintenance or repairs while the equipment is in operation.

Wear proper protective equipment during equipment installation, maintenance, or repair.

Replacing ComponentsVerify that all components (such as cables, hoses, etc.) are tagged and labeled during assembly and disassembly of equipment to ensure correct installment.

Replace failed or damaged components with original equipment manufacturer certified parts. Failure to do so could result in equipment damage or injury to personnel.

Routine MaintenanceEquipment must be maintained on a routine basis. See product-specific service manuals for maintenance recommendations.

Proper Use of EquipmentNational Oilwell Varco equipment is designed for specific functions and applications, and should be used only for its intended purpose.

Read and follow the guidelines below before installing equipment or performing maintenance to avoid endangering exposed persons or damaging equipment.

Failure to conduct routine maintenance could result in equipment damage or injury to personnel.

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General Information1LXT Ram Blowout Preventer


Safety PrecautionsExposure to the daily hazards of drilling can lead rig crews and service personnel to disregard or overlook hidden hazards. The safety precautions listed below should be observed at all times.

Equipment Repairs or AdjustmentsTurn off the system power and bleed all pressure prior to making any repairs or adjustments that do not require system power.

Hydraulic LinesHydraulic lines carrying fluids at high pressures can inflict potentially fatal injuries if the pressure escapes. Protect hydraulic lines from cutting, scraping, pinching, or other physical damage. Always wear hard hats and safety glasses when working around hydraulic lines. Bleed the pressure from any hydraulic line prior to disconnecting any fittings. Respect the prescribed ASME code minimum bend radius for hydraulic lines. Bending around too short a radius can rupture the line.

Welding and CuttingDo not weld or operate acetylene-cutting torches near unprotected electrical cable, flexible hose, or hose bundles. Weld spatter can seriously damage the hose or cable. Ensure no slag or spatter enters the hydraulic system.

Replacement PartsMany of the BOP components, though apparently similar to commercial hardware, are manufactured to system design specifications. To avoid possible hazardous failures, use only exact NOV replacement parts or assemblies (see Chapter 5, titled "Specifications and Parts Lists”).

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Page 2-1 of 6

Introduction

General DescriptionNational Oilwell Varco (NOV) manufactures Shaffer® 7 1/16" LXT blowout preventers with 5,000 psi working pressure and 3,000 psi working pressure. Both preventers are identical in operation. The difference between the two preventers is the API end connections, which limit the working pressure of the preventer.

The Shaffer® hydraulic operated model LXT ram blowout preventer (LXT BOP) with manual locking operators provides a rugged, reliable preventer that is easily serviced in the field. The manual lock LXT BOP is available in single and double models (see Figure 2-1). Contact NOV sales for special configurations.

Figure 2-1. LXT Single and Double Preventers

NOV manufactures manual lock LXT BOPs in the sizes shown in the table titled “LXT BOP Available Sizes and Working Pressures”.

LXT BOP Available Sizes and Working Pressures

Working Pressure Bore

5,000 psi (345 bar) 7-1/16” (180 mm)

3,000 psi (207 bar) 7-1/16" (180 mm)

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Introduction2LXT Ram Blowout Preventer


Special features include:

Patented “Boltless Door” design for fast and simple ram changes.

Radial door seals between door and body.

Standard internal H2S trim.

One piece ram assemblies.

Wear rings between the piston and cylinder to increase seal life.

Polyurethane lip-type piston seals with lifetime lubrication.

Lip-type ram shaft seals to hold the wellbore pressure and the opening hydraulic pressure.

Secondary ram shaft packing seals.

Slider Bar, Protective Cover (Optional).

Figure 2-2. LXT BOP Protective Cover (P/N 20039943)

Slider Bar Cover

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Introduction 2

The LXT preventer is designed for drilling and workover service. The LXT preventers are hydraulically operated and can be manually locked by turning a handle or (optional) handwheel (see Figure 3-5 on page 3-8) . The standard trim unit is suitable for internal H2S environments. Units can be manufactured for Arctic to -75 ºF (-59 ºC) and full H2S environmental services. Standard units can be retrofitted for full environmental H2S service. NOV preventers are manufactured in accordance with the American Petroleum Institute (API) specification 16A and the National Association of Corrosion Engineers (NACE) document NACE Standard MR 0175 (current revision).

This manual provides the installation, operation, and maintenance procedures for standard manual lock LXT BOP models with manual lock operators. The manual lock operators are used to close the ram assemblies on the drill pipe and close off the well bore. The manual lock operators require a hydraulic closing pressure of 1,500 psi (103 bar) to accomplish sealing the well bore pressure to the rated working pressure of the preventer. Maximum working pressure for the hydraulic operators is 3,000 psi (207 bar). When the rams are hydraulically closed, the manual lock acme thread locking bolts are rotated clockwise to manually lock the rams in the closed position (see Figure 2-3).

Figure 2-3. LXT Blowout Preventer

Acme ThreadLock Bolt

HydraulicOperator

Hydaulic Operator(3,000 psi WP)

Side Outlets Boltless Door Assemblies

Secondary Seal Assemblies

Locking Bars(Manually removed andinserted)

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BOP Functional OverviewA ram BOP is a safety tool used during the drilling or workover operation to control well bore pressure. The BOP achieves this pressure control by closing its rams to seal around drilling tubulars, an open hole or to shear drilling tubulars under various drilling conditions. Under normal drilling the BOP has little or no internal pressure. However, if the drill bit penetrates a high-pressure oil or gas pocket in the well, the BOP rams can be closed so that the high-pressure returning well fluid (whose pressure has overcome the weight of the drilling mud) will not blow out of the well. The BOP is normally composed of a pressure containing body with a vertical through bore with doors (including door operators) on either side, which hold the BOP rams and their hydraulic operating mechanisms. Flanged or studded API connections are configured on either end of the body at the vertical bore to facilitate connecting the LXT preventer to a BOP Stack or other well control components. The body is generally configured with two outlets (one on each side) under each ram cavity located 90º to the doors, which are routed laterally through the body to the vertical bore forming a well bore fluid outlet path. The side outlets are used in conjunction with the choke and kill valves, choke manifold and other well control equipment to bring the high well bore pressure under control using a variety of well control techniques available to the well operator. (See Figure 2-3 on page 2-3 for BOP general features.)

The LXT Ram BOPs are functioned hydraulically by the rig operator using the BOP Control System. BOP controls are generally located on the Drillers and/or Toolpushers Control Panels and at the Hydraulic Power Unit (HPU).

Door Locking SystemThe LXT BOP door locking system provides simple and fast opening and closing of BOP doors, representing a major step toward easy servicing. Several operational benefits are available from this system.

The LXT BOP door locking system departs from the conventional bolting method. The entire door attachment method can be accomplished by a single individual opening and closing the doors.

The LXT BOP door locking system replaces axially-loaded threaded members (bolts) with transaxially-loaded bearing members. The bearing members act as locking pins, taking the separation load (generated by well bore pressure) in bearing and shear only, not in tension. The bearing members (locking bars) are contained between the body and door on the BOP, providing a pressure containing lock. The number of locking members (locking bars) is reduced to two, running across the top and bottom of the door (see Figure 2-3 on page 2-3). This replaces the threaded member system of four to ten bolts per door. Actuation or engagement of the two locking members is fast and easy, dramatically reducing the opening and closing time compared to the threaded member system which requires that each bolt be made up separately.

The LXT BOP door locking system utilizes a set of lateral grooves located in both the door and BOP body running perpendicular to the ram cavity. These grooves, when aligned, allow load bearing (locking) bars to lock the door and body together. The round lock bars are inserted into or pulled from the grooves to accomplish the manual lock and unlock process. Groove pairs and locking bars are located both above and below the ram cavity spanning the interface between the door and body. (See Figure 2-4 on page 2-5.)

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Introduction 2

Figure 2-4. Lockbar Grooves

Once the lock bars are removed, the door assembly is pulled away from the BOP body sliding along two support rods allowing access to the ram assembly. The LXT door assembly does not hinge on a bracket, thus providing a manual process that is simple, fast and reliable. For more detail about the door locking system, see the section titled "Opening Doors" on page 3-12 and the section titled "Closing Doors" on page 3-14).

Hydraulic OperatorsThe LXT BOP is equipped with manual lock hydraulic operators. The manual lock hydraulic operators are located either side of the LXT body (see Figure 2-4).

The LXT BOP manual lock hydraulic operators are closed with 1,500 psi (103 bar). This pressure squeezes the ram assembly rubber around the pipe and between the ram assemblies and the upper seat of the ram cavity to seal-off the well bore pressure. Each operator is manually locked in the close position by the clockwise rotation of the acme thread locking bolt (see Figure 2-4). The locking bolts prevent the rams from being opened by the well bore pressure, even when closing hydraulic pressure is removed. The hydraulic operators do not require adjustment for changes in ram types or to compensate for ram wear over time.

Acme ThreadLocking Bolt

HydraulicOperator

HydraulicOperator

Support Rods

Door Lockbar Grooves

Support Rods

Lockbar (2 per door)

BOP Body LockbarGrooves

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Page 3-1 of 14

Installation and Operation

Preinstallation InspectionThe inspection process includes the activities listed below:

1. Thoroughly clean the LXT manual lock blowout preventer (BOP) before installation. (See the table titled "LXT Ram BOP Cleaning and Lubricating Instructions" on page 4-27.)

2. Clean and inspect the sealing surface of the ring groove for minor pits and scratches; remove these with emery cloth. If there is excessive damage, call a National Oilwell Varco (NOV) service representative.

3. Clean and inspect studs and nuts. Replace any that are damaged.

4. Ensure the correct size rams are in each cavity. The part number is stamped into the block of each ram.

5. Thoroughly clean and lubricate the inside of the LXT BOP.

6. Ensure that all support rods are installed prior to BOP operation.

7. Determine if BOP has been properly maintained or condition is unknown and then proceed to one of the following, as applicable:

the section titled "Condition of BOP is Unknown" on page 3-2; or

the section titled "BOP Maintained on Scheduled Maintenance Program" on page 3-2.

WarningWarning

Operation of BOP without support rods in place will effect sealing characteristics and create a drop hazard of door assemblies, which is extremely dangerous to personnel.

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Installation and Operation3LXT Ram Blowout Preventer


Condition of BOP is UnknownIf the condition of the BOP is unknown (e.g., stored for some length of time, has not been maintained on a scheduled maintenance program, etc.), perform a three-month maintenance check, as described in the section titled "Three-Month Preventive Maintenance" on page 4-4. The three-month maintenance check includes:

Visual inspection and thorough greasing the inside of the BOP;

Performing a field wellbore pressure test (see the section titled "Field Wellbore Pressure Test" on page 4-9);

Performing an hydraulic pressure test (see the section titled "Hydraulic Pressure Test" on page 4-11);

Operate the manual locks (see the section titled "Manual Locking the Rams" on page 3-12).

BOP Maintained on Scheduled Maintenance ProgramIf the BOP has been properly maintained (scheduled maintenance program), a monthly maintenance check is all that is required. (See the section titled "Monthly Preventive Maintenance" on page 4-3.)

The monthly maintenance check includes:

Performing a field wellbore pressure test (see the section titled "Field Wellbore Pressure Test" on page 4-9);

o Checking for external hydraulic leaks while pressure testing.

Verify that door lock bars are propperly lubricated. Failure to heed this caution may cause difficulty manually rotating the lock bar.

iiiCleaning, inspection and testing of the LXT BOP immediately after completion of drilling operations reduces installation time on the next well (see the section titled "Cleaning and Storage of the LXT BOP" on page 4-25).

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Installation and Operation 3

Installation Instructions1. Install BOP right-side-up. The LXT models have lifting lugs labeled ‘TOP’, which are

above and to the right of the side outlets (see Figure 3-1).

On all LXT models:

Externally, the side outlets for the choke and kill lines are below the rams;

Internally, the skids in the ram compartments are below the rams, and ram sealing areas are located in the top of the ram cavity.

Figure 3-1. Lifting LXT BOP

WarningWarning

If the BOP is installed upside-down, it will not contain wellbore pressure.

Side Outlet

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2. Lift the LXT manual lock BOP. On models with lifting lugs cast into the body, the BOP is lifted by wrapping a chain or lifting strap of sufficient strength around the lug (see Figure 3-1 on page 3-3).

3. Make flanged and studded connections:

(See Figure 3-2.)

a. Install the ring gasket dry. See the table titled "API Ring Gaskets" on page 5-15, for the proper part number.

b. Install the BOP on the mating flange.

c. Lubricate the stud threads and nut faces with Moly Paste Lube 503 (P/N 7403582) or grease specified in API BUL 5A2: Thread Compounds.

Figure 3-2. End Connections

Do not lift the BOP by the hydraulic operators. This will damage the operator cylinder, piston assembly and/or the ram shaft and prevent the BOP from working correctly. Do not lift the BOP with the slider bars.This will damage the slider bars and prevent the BOP from working correctly.

iiiFor BOP weight information, see the table titled "BOP Characteristics" on page 5-2. Use a chain or cable capable of lifting the weight given.

Flange Connection Studded Connection

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d. Install the studs and/or nuts. See the table titled "API Nuts" on page 5-13 and the table titled "Tap End Studs for API Flanges" on page 5-14 for the proper part number.

e. Tighten all nuts uniformly in a diametrically staggered pattern, as shown in Figure 3-3. See the table titled "Recommended Flange Bolt Torque" on page 3-6 for proper torque specifications.

Figure 3-3. Flange Bolting Sequence

Use extreme care during removal and installation of studs and nuts. Inspect the threads of the studs and stud hole for damage such as deformation, stripping, or burns. Do not over-torque studs when installing in studded flange.

Use specified lubricants. Do not use Loctite™ or similar compounds.

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* Torque values are satisfactory for both standard and H2S studs. Reference API specification 6A. The above table shows torque values arrived at by using new commercial stud bolts and nuts, well-lubricated threads, and nut faces with API thread compound (API Bul. 5A2: Thread Compounds). This produces a stress of 52,500 psi (362.0 MPa) in the bolting.

Recommended Flange Bolt Torque

Torque* (using API thread compound)

Torque* (using Moly Paste 503—P/N 7403582)

Bolt Size ft-lb. Nm ft-lb. Nm

¾"-10 UNC 200 271.2 114 154

7/8"-9 UNC 325 440.6 181 245

1"-8 UNC 475 644.0 269 365

1 1/8"-8 UNC 600 813.5 386 523

1 ¼"-8 UNC 900 1,220.2 533 723

1 3/8"-8 UNC 1,200 1,627.0 712 965

1 ½"-8 UNC 1,400 1,898.2 926 1,255

1 5/8"-8 UNC 1,700 2,304.9 1,180 1,600

1 ¾"-8 UNC 2,040 2,765.9 1,476 2,001

1 7/8"-8 UNC 3,220 4,365.7 1,818 2,465

2"-8 UNC 3,850 5,219.9 2,209 2,995

2 ¼"-8 UNC 5,250 7,130.0 3,149 4,269

2 ½"-8 UNC 7,250 9,860.0 4,324 5,862

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4. Repeat step 3 to connect the side flanges.

5. Connect hydraulic lines from BOP closing unit to the 'Open' and 'Close' ports of the BOP. Make sure all connections are clean and tight. Each set of rams requires one opening and one closing line.

Figure 3-4. Open and Close Hydraulic Ports

iiiOpening and closing hydraulic ports are clearly marked on the front and back side of the BOP (see Figure 3-4). A gauge and valve can be included in the opening and closing hydraulic lines to the BOP. This will facilitate testing procedures (see Figure 4-10 on page 4-14).

TOP

OPEN

Open Ports(1 per cavity)(close ports on back side)

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6. Install handwheel (see section titled "Handwheel Assembly" located in the Specifications and Parts Lists of this user's manual).

A universal joint and handwheel are optional (P/N 185599) for each locking shaft. Handwheel extensions are cut from 2 inch (50.80mm) schedule 40 pipe furnished by the customer. Perform the following:

a. Fabricate a handwheel extension for each locking shaft.

b. Attach a handwheel to one end of each extension.

c. Attach a universal joint to the other end of each handwheel extension (see Figure 3-5).

Figure 3-5. Manual Lock Handwheel Assembly (Optional)

7. Perform a Field Wellbore Pressure Test. (See the section titled "Field Wellbore Pressure Test" on page 4-9.)

iiiTwo handwheel assemblies are required on a single LXT preventer and four handwheel assemblies are required on a double LXT preventer.

2” Schedule 40 Pipe(Customer Supplied)

Universal Joint

Handwheel Assembly

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OperationHydraulic OperationThe rams can be hydraulically closed and manually locked. Under normal operating conditions, 1,500 psi (103 bar) hydraulic pressure is recommended. This operating pressure will close any model LXT BOP and contain its rated wellbore pressure. Hydraulic operating pressure may be increased to 3,000 psi (207 bar) on any LXT BOP, if desired.

Hydraulic FluidHydraulic fluid under pressure drives the pistons, which then close and opens the rams. The hydraulic fluid used should have the following characteristics:

Non-freezing in cold climates

Lubricity to reduce wear

Chemical compatibility with the elastomer seals

Corrosion inhibitors for metal surface protection.

Recommended Hydraulic Fluid Hydraulic oil with viscosity between 200 and 300 SSU at 100 ºF (38 ºC). In the LXT closed hydraulic system, there is no waste of oil and fluid costs are negligible.

Where pollution due to accidental spillage of hydraulic fluid is a problem, use a water soluble oil or premix control fluid. To prevent freezing at lower temperatures, adding ethylene glycol without any additives is recommended. Do not use commercial antifreeze mixes.

Emergency Fluid Recommendations

In an emergency, where hydraulic fluid is lost and the BOP must be operated, the fluids listed below can be substituted:

1. When using hydraulic oil:

Add motor oil (SAE 10W is recommended but heavier oils can be used)

Add water if motor oil is not available, but after the emergency, the hydraulic system must be flushed and refilled with hydraulic oil

2. When using a water soluble mixture or premix fluid, add more water.

LXT Fluid Volume Requirements

Working Pressure

Bore Size

Piston Size

Closing Ratio

Gallons to Open

Gallons to Close

5,000 psi 7" 5" 8.45 .32 .39

3,000 psi 7" 5" 8.45 .32 .39

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3. After the emergency, replace the fluid in the system with the proper mixture.

Closing and Opening the RamsClosing the Rams

1. Apply 1,500 psi (103 bar) closing hydraulic pressure (see the section titled "Manual Locking the Rams" on page 3-12).

2. Verify that the rams close by observing the inward movement of the piston tail rod (see Figure 3-6 on page 3-11).

Opening the Rams

1. Apply 1,500 psi (103 bar) opening hydraulic pressure.

2. Verify that the rams open by observing the outward movement of the piston tail rods (see Figure 3-6 on page 3-11).

Do not use the following fluids:

Diesel fuel or kerosene—these fluids cause the rubber parts to swell and deteriorate. Drilling mud—the grit in this fluid will cause the pistons

and cylinders to wear and gall rapidly.

Before opening the rams, turn both locking shafts counter-clockwise to ensure that the rams are unlocked. If the rams are partly locked, the locking shaft threads may be damaged when the rams are hydraulically opened.

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Figure 3-6. Manual Lock Rams

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pera

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in O

PE

N p

ositi

onan

d C

LOS

ED

Doo

r

Man

ual L

ocki

ngS

haft

Pis

ton

Tail

Rod

Ope

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r in

OP

EN

pos

ition

and

OP

EN

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r

Han

dle

for

7”-5

M L

ocki

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Man

ual O

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Manual Locking the Rams1. Apply 1,500 psi (103 bar) closing hydraulic pressure.

2. Using the handle (see Figure 3-6 on page 3-11) or handwheel, carefully rotate each locking shaft clockwise until it locks; each locking shaft will move inward until it stops against ram shaft tailrod.

Control system hydraulic pressure may now be removed.

Unlocking Operation

1. Apply 1,500 psi (103 bar) hydraulic closing pressure.

2. Rotate the locking shaft counterclockwise until it stops.

3. Rotate 1/8 of a turn clockwise to prevent temperature changes from jamming the locking shaft in the unlocked position.

4. See the section titled "Opening the Rams" on page 3-10.

Opening Doors

The LXT is designed for easy door opening. (See Figure 3-9 on page 3-14).

Do not over tighten. If over tightened, the locking shaft can be damaged.

Do not apply opening hydraulic pressure while the BOP is manually locked. This may damage the locking shaft threads.

WarningWarning

Prior to opening door, ensure that support bars are installed and end caps are installed and secured with end cap retaining bolt. If end caps are not installed, the door can slide off end of support bars (see Figure 3-8 on page 3-13). Failure to heed this warning can cause injury to personnel and damage to equipment.

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1. Disconnect any external handwheel assemblies.

2. Using dead-blow sledgehammer, strike lock bar retainer cap to break lock bar loose (see Figure 3-9 on page 3-14, item 1).

3. Unscrew and remove hand knobs from the both ends of LXT lock bar (see Figure 3-7).

Figure 3-7. LXT Lock Bars

4. Install slide hammer (see Figure 3-9 on page 3-14, item 3). Remove both lock bars from the door to be opened. Use care not to damage lock bar surfaces. Store bars in safe location.

5. To open the door, grip door assembly by cylinder head and pull door away from BOP body (See Figure 3-8).

Figure 3-8. Opening LXT Door

Hand Knobs

End Cap StopsSupport Bars

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Closing Doors1. Prior to closing door, carefully clean and lubricate support rods, lock bars, lock bar

grooves on door, and body with standard grease.

2. Push door assembly in against body

3. Install the lock bars into grooves and install retaining caps..

4. See the section titled "Ram Assembly Removal and Inspection" on page 4-19 for additional information.

Figure 3-9. Door Opening

iiiDo Not Use grease on door seal area of door and body. Lubricate door seal area and body with SAE 10W oil.

WarningWarning

Ensure that lock bar retaining caps are installed prior to operating BOP.

Lockbar

Retaining Caps

Slide Hammer Assembly

1. Strike retainer caps with dead-blow sledgehammer..

3. Attach slide hammerto pull rods.

2. Unscrew retaining caps.

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Page 4-1 of 28

Maintenance

Preventive Maintenance

Maintenance Schedule

The purpose of the maintenance schedule is to detect wear in a NOV Shaffer® manual lock model LXT BOP so that it can be repaired before a failure occurs in a drilling emergency. The inspection sequence avoids repetition of work so that minimum time is required for a thorough maintenance program. (See the table titled "Maintenance Schedule, Manual Lock Ram BOP1" on page 4-2.)

Additional information is available in the following publications:

API Spec. 6A, 16A

API RP53

NOV Brochures

When to Call a Service RepresentativeRepairs are performed by either the rig personnel or a NOV service representative. The following identifies the repairs normally performed by the rig personnel and provides guidelines to determine when a service representative should be called.

Rig personnel normally perform the following:

Changing rams to different pipe sizes

Running wellbore pressure tests and hydraulic pressure tests

Replacing worn ram rubbers and door seals

Buffing out minor scratches on the ram sealing area and door sealing area of the body.

iiiThere are two lower and two upper door assemblies installed on a double LXT Ram BOP. Due to the slider bar configuration and the QD male hydraulic coupler (item 8) on the door, to the QD female hydraulic coupler (item 25) on the body (see the table titled "BOP and Door Components" on page 5-4 and Figure 5-2 on page 5-5 for illustration). To avoid confusion while installing the doors onto the body, it is recommended to remove only one door assembly at a time from the BOP body. In this manner, the door to body QD hydraulic connections and slider bars will properly align with each other.

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4-1

Maintenance4LXT Ram Blowout Preventer


A NOV service representative normally will be called to make any repairs that require the hydraulic system to be opened, including the following:

Replacing piston seals

Replacing cylinder seals

Replacing manifold pipe seals

Re-packing the ram shaft tail rod

Re-packing the ram shaft seal assembly

Run yearly inspections to determine if the BOP needs to be sent to a repair facility for major rework.

1. Specific data is required for ordering parts. See the section titled "Ordering Replacement Parts" on page 5-1.

2. These intervals are typical and serve as convenient designations to separate the simpler from the more complex inspections.

3. Some operators use the yearly maintenance inspection as a rig acceptance test.

4. Three-year to five-year maintenance will be performed only after a yearly inspection indicates the need for it.

iiiThe annual inspection includes wellbore pressure tests, hydraulic pressure tests, inspection and measurement of the ram cavities.

Maintenance Schedule, Manual Lock Ram BOP1

Performed

Interval2 At By Summary

Daily Rig Rig PersonnelOperate all rams. Look for external hydraulic leaks (see "Daily Maintenance”).

Monthly Rig Rig Personnel

Clean, inspect, and lubricate door lock bars. Run a field wellbore pressure test. Look for external hydraulic leaks (see the section titled "Monthly Preventive Maintenance" on page 4-3).

Three Months Rig Rig Personnel

Open doors and inspect visually. Run a field wellbore pressure test and an internal hydraulic pressure test. Operate manual locks (see the section titled "Three-Month Preventive Maintenance" on page 4-4).

Yearly3 RigNOV Service Representative

Open doors. Measure rams and ram cavity. Do field repairs as needed. Run a field wellbore pressure test and an internal hydraulic pressure test. Operate manual locks (see the section titled "Yearly Preventive Maintenance" on page 4-8).

Three-Five

Years4Service/ Repair Facility

NOV Service Personnel

Completely disassemble. Repair or replace all parts as required. Replace all seals. Run a field wellbore pressure test and an internal hydraulic pressure test. Operate manual locks (see the section titled "Three-Year to Five-Year Maintenance" on page 4-8).

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Maintenance 4

Daily MaintenanceThe procedures described below should be performed daily:

1. All rams should be functioned to verify that they operate properly. If possible, watch the rams move by using a mirror to obtain a reflected image of the rams. If this is not possible, observe the movement of the tail rod.

2. Check the tail rod shaft seal areas, cylinder head o-ring areas, manifold pipe seals, door seal areas, weep holes, hydraulic connections, and all pipe plugs for possible leakage of hydraulic fluids (see Figure 4-1 on page 4-4).

3. Check areas for possible leakage of well fluid and/or hydraulic fluid (see Figure 4-1 on page 4-4).

Monthly Preventive MaintenanceRun this test series before starting a new well and at least monthly while drilling.

1. Ensure all lock hand knobs are in place and tight.

2. Clean, inspect, and lubricate door lock bars.

3. Run a field wellbore pressure test as described in the section titled "Field Wellbore Pressure Test" on page 4-9.

4. While running the field wellbore pressure test, look for external hydraulic leaks (see Figure 4-1 on page 4-4).

5. If universal joints are installed, check them to ensure they are tight on the locking shaft.

iiiPipe rams should be closed on pipe. Blind rams should be closed and opened when the pipe is out of the hole.

iiiTo observe if the ram shaft packings are leaking, the weep hole plugs must be removed on each door (see Figure 4-12 on page 4-18).

Verify that door lock bars are properly lubricated. Failure to heed this caution can cause removal of bars to become difficult.

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Figure 4-1. Possible Leak Areas

Three-Month Preventive Maintenance1. Before opening the doors, run a field wellbore pressure test as described in the

section titled "Field Wellbore Pressure Test" on page 4-9 and a hydraulic pressure test as described in the section titled "Hydraulic Pressure Test" on page 4-11. This information will be very helpful in the following inspections. Also, a NOV service representative can be called at this time if hydraulic system repairs are required.

2. While the rams are closed, turn the locking shaft approximately two turns clockwise and then turn them back to the fully unlocked position. This will verify that the manual locks function satisfactorily.

3. Remove the handle or universal joints from the locking shafts.

4. Open the rams with 1,500 psi (103 bar).

5. Bleed all hydraulic pressure.

6. Open the doors and remove the rams (see the section titled "Ram Assembly Removal and Inspection" on page 4-19).

7. Clean and inspect rams (see the section titled "Ram Assembly Removal and Inspection" on page 4-19).

8. Wash out the inside of the BOP so that it can be inspected.

9. Remove minor pits and scratches from the ram rubber sealing surface with emery cloth.

Cylinder HeadO-Rings

All Hydraulic PathPlugs

Manifold Seals

Tail RodSeal Assemblies

Ram Shaft WeepHoles (1 per Cyl.)

Door Seals

Hydraulic Connections

API Connections

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Maintenance 4

10. Check the bore for accidental damage (See Figure 4-2). Smooth as required. Occasionally the drill pipe will rotate against the bore and cause excessive wear. Measure the maximum bore diameter and estimate the maximum wear on any side.

If any radius is more than 1/8" (3.18 mm) oversize, send the BOP to a NOV repair facility for a complete rework.

Figure 4-2. LXT Bore Cavity

11. Check the door sealing area on the BOP body for pits and scratches. Remove pits and scratches with emery cloth.

12. Close door assemblies and install lock rods and retaining caps.

13. Inspect the ram shafts as follows:

a. Apply reduced closing hydraulic pressure to fully extend both ram shafts for inspection.

b. Reduce closing hydraulic pressure to 0 psi (0 bar).

c. Open the doors. (See the section titled "Opening Doors" on page 3-12.)

d. Visually check the Outside Diameter of each ram shaft for pits and scratches. The ram shafts should be replaced by a NOV service representative if pits or scratches are visible.

e. Visually check the end of each ram shaft for cracks in the neck between the end and the shaft. The ram shafts should be replaced by a NOV service representative if cracks are visible.

f. Close the door assembly, install lock rods and retaining caps.

g. Apply reduced opening pressure to retract rams.

14. Inspect the tail rod end of the ram shaft.

a. Apply opening hydraulic pressure to extend the ram shaft.

b. If a tail rod is bent or cracked, the ram shaft should be replaced. If replacement is necessary, call a NOV service representative.

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15. Inspect the locking shaft.

a. Apply closing pressure.

b. Screw in clockwise.

c. Back out counter clockwise.

d. Check for freedom of movement.

16. Inspect the door sealing surfaces.

a. Open Doors (See the section titled "Opening Doors" on page 3-12.

b. Remove the door seals (see Figure 4-3).

Figure 4-3. Remove Door Seal

iiiAnytime door assembly is open, bleed pressure to 0 psi (0 bar).

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Maintenance 4

c. Inspect the door seal area. Smooth minor pits with emery cloth.

Figure 4-4. Inspecting Door Seal Area

d. Clean and oil the door sealing surface on the body with SAE 10W oil.

e. Oil the door seal seat and face with SAE 10W oil.

f. Clean QDs in door and body.

g. Replace the door seals (see Figure 4-5) if extruded, brittle, cut, or nicked. (See the section titled "Door Seal Replacement" on page 4-16 and the section titled "Troubleshooting" on page 4-15.)

Figure 4-5. Replacing Door Seal

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17. Reinstall the rams (see the section titled "Installation of Rams" on page 4-22).

18. Close doors.

19. Clean and grease support bars.

20. Clean and grease lockbar grooves on door and body.

21. Run a final field wellbore pressure test (see the section titled "Field Wellbore Pressure Test" on page 4-9) before the BOP is returned to service.

Yearly Preventive MaintenanceYearly maintenance is performed by a NOV service representative. The purpose of the yearly maintenance operation is to evaluate wear in the BOP so that a major overhaul (three-year maintenance) can be scheduled at a convenient time, but before a failure occurs.

The yearly maintenance includes:

Wellbore pressure test

Hydraulic pressure test

Inspection and measurement of cavity for wear and damage

A complete review of BOP performance to determine if the BOP should be sent to a NOV repair facility for a major overhaul.

Three-Year to Five-Year MaintenanceThree-five year maintenance is performed in a NOV repair facility after a yearly maintenance check determines it is necessary. The BOP is completely disassembled, cleaned, and inspected. All elastomer seals are replaced and all parts are repaired or replaced as required. Hydraulic and wellbore pressure tests are run and the BOP is returned to service.

iiiAll elastomer seals should be replaced during the three-five year inspection regardless of condition.

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Maintenance 4

Pressure TestingField Wellbore Pressure TestThe final details of the test sequence will be established by the operator and contractor; therefore, modifications to this procedure may be required. See API Spec. 16A and API RP53, paragraph 7.A.2 for additional information.

Equipment Required

Connect the listed equipment as shown in Figure 4-6:

Two pressure gauges

Four valves

A test pump

Figure 4-6. Recommended Field Wellbore Pressure Test Equipment Set-up

Test Locations

The BOP can be tested in any of the following locations:

In a wellhead mounted stack

On a test stump

On a blind flange

BOP

Gauge 1 Gauge 2

Valve 1A

Valve 1BBleeder Valve

Valve 2

TEST PUMP

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Test Pressure

The test pressure should not exceed the lowest rated working pressure of any component or connection pressurized during the test. This includes one or more of the following:

BOP(s)

Wellhead

Casing string, if it will be pressurized during the test or if a leak in the test tool could cause it to be pressurized

All connections

Test Fluids

The recommended wellbore pressure test fluid is cold water, but drilling fluid may be used.

1. Fill the BOP with water or drilling fluid.

2. Close the pipe rams on an appropriate test tool using 1,500 psi (103 bar) hydraulic pressure (3,000 psi or 207 bar is optional).

Pressure Test1. Close valves #1A and #1B & bleeder valve. Open valve #2 (see Figure 4-6 on page

4-9).

2. Apply 200-300 psi (14-21 bar) wellbore pressure below the rams. Close valve #2. Hold test pressure for a minimum of 3 minutes. Check for low-pressure leaks. Monitor gauge #1.

3. Open valve #2. Increase the wellbore pressure to the test pressure determined in "Test Pressure”.

4. Close valve #2.

5. Hold the pressure for a minimum of 3 minutes.

6. Check for leaks on pressure gauge #1, the BOP exterior at the API connections, the door seals, the ram shaft weep holes, and at the rams if they are visible (see Figure 4-1 on page 4-4).

7. Close valve #2 (optional) open valve #1A & valve #1B with bleeder valve. Bleed wellbore test pressure to 0 psi (0 bar).

8. Repeat steps 1-7 for the second pressure holding period of 15 minutes.

9. If leaks are detected, see the table titled "Troubleshooting-LXT Manual Lock BOP" on page 4-15.

WarningWarning

Do not look into the ram bore while pressure is under the rams. Use a mirror to obtain a reflected image of the rams.

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Maintenance 4

Leak Repair

To repair leaks, perform the following:

1. Reduce all hydraulic pressure and wellbore pressure to 0 psi (0 bar).

2. API connection—tighten bolts or replace ring gasket as required (see step 3 of the section titled "Installation Instructions" on page 3-3).

3. Door Seal—replace door seal (see the section titled "Door Seal Replacement" on page 4-16).

4. Ram Shaft Weep Hole—call a NOV service representative. For an emergency repair, see the section titled "Emergency Ram Shaft Packing Repair" on page 4-17. As soon as possible after the emergency, call a NOV service representative to replace the ram shaft packing.

5. Ram—replace the ram rubbers (see the section titled "Changing Pipe and Blind Ram Rubbers" on page 4-24).

Hydraulic Pressure TestThe final details of the test sequence will be established by the operator and contractor; therefore, modifications to this procedure may be required. See API Spec. 16A and API RP53, paragraph 7.A.2 for additional information.

iiiIf the hydraulic system was opened before this test, close and open the rams three times to purge air from the system.

Pipe rams should always be closed on pipe to avoid excessive ram rubber wear. Closure on a tool joint will damage the block. Blind rams should only be closed on an open hole. Closing on pipe will damage the rubber and possibly the block.

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Opening Hydraulic Pressure Test

The opening hydraulic pressure test is performed according to the steps listed below:

1. Vent hydraulic closing pressure to zero psi (zero bar).

2. Apply 1,500 psi (103 bar) or 3,000 psi (55 bar), optional opening pressure.

3. Close the valve in the opening hydraulic line (see Figure 4-7).

Figure 4-7. Recommended Hydraulic Line Hookup

4. Observe the gauge between the valve and the BOP.

5. If there is no pressure drop, end the test.

6. If there is a pressure drop, perform the steps listed below:

a. Check for external leaks at the following locations (see Figure 4-8 on page 4-13):

Weep holes for ram shaft seal leaks—if leaking call a NOV service representative

Cylinder seal leaks—if leaking call a NOV service representative

Door seal leaks—if leaking see the section titled "Door Seal Replacement" on page 4-16.

GaugeValve

ClosingHydraulicLine

OpeningHydraulicLine

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Maintenance 4

Figure 4-8. Possible External Leaks

b. Check for internal leaks past the pistons in the following manner:

Disconnect the closing hydraulic line. A small amount of fluid will flow out of the BOP initially and stop. If fluid continues to flow out of the BOP, it is leaking past the piston and repairs are required.

Reinstall the closing hydraulic line.

Call a NOV service representative to repair the leak.

Cylinder HeadO-Rings

All Hydraulic PathPlugs

Manifold Seals

Tail RodSeal Assemblies

Ram Shaft WeepHoles (1 per Cyl.)

Door Seals

Hydraulic Connections

API Connections

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Closing Hydraulic Pressure Test

The closing hydraulic pressure test is performed according to the steps listed below:

1. Vent hydraulic opening pressure to zero psi (zero bar).

2. Apply 1,500 psi (103 bar) or (optional) 3,000 psi (207 bar) closing pressure.

3. Close the valve on the closing hydraulic line (see Figure 4-10).

Figure 4-9.

Figure 4-10. Ram Hydraulic Test Hook-up

4. Observe the gauge between the valve and the BOP.

5. If there is no pressure drop, end the test.

6. If there is a pressure drop, perform the steps listed below:

a. Check for external leaks at the following locations (see Figure 4-1 on page 4-4):

Cylinder head seals-if leaking, call a NOV service representative

Locking shaft seals-if leaking, call a NOV service representative

Manifold pipe seals-if leaking, call a NOV service representative

b. Check for internal leaks past the pistons in the following manner:

Disconnect the opening hydraulic line. A small amount of fluid will flow out of the BOP initially and stop. If fluid continues to flow out of the BOP, it is leaking past the piston and repairs are required.

Reinstall the opening hydraulic line.

Call a NOV service representative to repair the leak.

GaugeValve

ClosingHydraulicLine

OpeningHydraulicLine

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Maintenance 4

TroubleshootingFor a list of common problems likely to be encountered during operation, including possible causes and corrective action, see "Troubleshooting-LXT Manual Lock BOP" table below:

Troubleshooting-LXT Manual Lock BOP

Problem Possible Cause Correction

Will not hold well pressure

BOP is upside-down. When BOP is right side up, the side outlets are below the skids. Inside the BOP, the side outlets are below the rams (see the section titled "Installation Instructions" on page 3-3).

Bad ram rubbers Check ram rubbers and replace if necessary (see the section titled "Ram Assembly Removal and Inspection" on page 4-19.

Damaged seat Check seat sealing area for cuts and sealing surface scratches. Smooth minor damage with emery cloth (see the section titled "Three-Month Preventive Maintenance" on page 4-4).

Leaking ram shaft seal Check the weep holes in the doors for leakage. Replace the ram shaft seal if necessary. A temporary repair can be made by energizing the plastic packing, but the seal should be replaced as soon as possible (see the section titled "Emergency Ram Shaft Packing Repair" on page 4-17, Figure 4-1 on page 4-4).

Leaking door seal Check for leaks between the doors and the body. Replace the door seals as required (see the section titled "Monthly Preventive Maintenance" on page 4-3 and the section titled "Door Seal Replacement" on page 4-16).

Pump leaking in the test unit

Install isolation valve in the pump line close to the BOP. Install a pressure gauge between the isolation valve and the BOP. No indication of pressure drop indicates a leak in the test unit.

Rams will not close

Hydraulic fluid not reaching the BOP

Remove the closing line from BOP and pump a small amount of hydraulic fluid through it. If no fluid appears, the line is plugged. Clear the closing line.

Opening hydraulic line plugged or piston seal damaged

Remove opening line from the BOP and apply closing hydraulic pressure.1. If hydraulic fluid spurts out of BOP briefly and stops and rams

close, the opening hydraulic line is plugged. Call a NOV service representative.

2. If hydraulic fluid spurts out of BOP continuously, the piston seal is damaged. The rams would also move, but there would be no pressure buildup. Call a NOV service representative.

Foreign substance in the wellbore area

Open the door(s) and inspect for cement, metal fragments, etc. Clean the ram cavity.

Lock bars are hard to remove

Corrosion or material build up

Thoroughly clean bars and grooves then re-lubricate. A new application of Perma-Silk G (solid film lubricant) maybe needed.

One (or both) rams will open partly, but will not move out of the wellbore

Manual lock(s) rams partly locked

Unlock rams. Check for damage to the locking shafts, threads, or bent shaft (see the section titled "Three-Month Preventive Maintenance" on page 4-4).

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Corrective MaintenanceDoor Seal ReplacementThe door seal is replaced by performing the steps listed below:

1. Disconnect the universal joints from the locking shafts.

2. Open the doors (see the section titled "Ram Assembly Removal and Inspection" on page 4-19).

3. Remove the door seal from its seat (see Figure 4-11).

Figure 4-11. Replacing the Door Seal

4. Clean the door seal seat and face.

5. Inspect the door seal seat for damage. Remove minor pits and scratches with emery cloth. If the seat is badly damaged, call a NOV service representative.

6. Clean and oil the door sealing surface on the body with SAE 10W oil.

7. Oil the door seal seat and face with SAE 10W oil.

Door assemblies are hard to slide

Bent or dirty slide rods Check the straightness of the rods. Replace if necessary. Clean and lubricate.

Worn DU Bearings Replace the door DU bearings for the slide rods. See the table titled "BOP and Door Components" on page 5-4.

Troubleshooting-LXT Manual Lock BOP (Continued)

Problem Possible Cause Correction

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4-16


Maintenance 4

8. Install a new door seal.

9. Close the door.

Emergency Ram Shaft Packing RepairAn emergency repair can be made by reducing the hydraulic pressure to 0 psi (0 bar) and activating the secondary ram shaft seal on the BOP (see Figure 4-12 on page 4-18). As soon as possible after the emergency, call a NOV service representative to repack the ram shaft.

1. Remove the pipe plug from the port on the door.

2. With the pipe plug removed, a second socket head screw plug is exposed. Tighten this clockwise to inject the secondary ram shaft seal.

3. Replace the socket head pipe plug removed in step 1.

4. Call a NOV service representative to repack the ram shaft.

Do not substitute an O-ring for the door seal. Use correct NOV replacement parts only. Failure to heed this caution may result in malfunction of the BOP.

iiiOn the LXT, the secondary seal port is located between the lock bar gooves on the side of the door.

iiiAdditional packing may be injected until the leak stops. Remove the packing plug, add packing and re-tighten the packing plug.

WarningWarning

It is imperative to replace ram shaft seal assemblies as soon as possible. Continued use with emergency packing can damage BOP components.

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Figure 4-12. LXT Secondary Seal Assembly

Secondary SealPort Location

Weep Hole

Port Plug (P/N 066504)

Packing Plug (P/N 207077)

Check Valve(P/N 20023094)

Ram Shaft SealAssembly (P/N 185174)

Secondary Packing (P/N 050000)

Door

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4-18


Maintenance 4

Ram Assembly Removal and InspectionProcedures for removal and installation of pipe, blind and shear rams in the LXT BOP are the same.

Removal of Rams

Remove the rams according to the steps listed below:

1. Open the rams with 1,500 psi hydraulic pressure.

2. Bleed hydraulic pressure to 0 psi (0 bar) so that the door will open easily and to prevent possible damage. (See Figure 4-13.)

Figure 4-13. LXT Ram BOP

WarningWarning

Support rods must be installed with end caps before starting this operation.

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3. Remove two of the retaining caps on both bars. Remove the two door lock bars. (See Figure 4-14 and Figure 4-15.) Store lock bars in safe area.

Figure 4-14. Pulling the Lower Lock Bar

Figure 4-15. Pulling the Upper Lock Bar

iiiIf the bar cannot be removed by hand. The supplied ‘slide hammer’ can be used (see Figure 3-9 on page 3-14).

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4-20


Maintenance 4

4. By hand, pull the door assembly back along the support bars until it stops. See Figure 4-16.

Figure 4-16. Pull Door Assembly Open

5. Slide ram out and lift. See Figure 4-17 and Figure 4-18 on page 4-22.

Figure 4-17. Slide The Ram Assembly Out

If the BOP is not flanged to a wellhead or securely fastened, open only one door at a time. The weight of two open doors may tip the BOP over.

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Figure 4-18. Removing/Installing The Ram Assembly

Cleaning and Inspection of Rams1. Clean the rams.

2. Inspect the ram rubbers for damage such as cracking, gouging, chunking, or splitting. Replace the rubbers if damaged (see the section titled "Changing Pipe and Blind Ram Rubbers" on page 4-24).

Installation of Rams1. Thoroughly grease all ram exterior surfaces and the ram shaft-mounting slot.

2. Grease the inside of the BOP body at the following locations:

Ram shaft foot.

Side pads in the body cavity.

Skids in the bottom of the body cavity.

Ram sealing seat in the top of the body cavity.

3. Clean and oil the door face with SAE 10W oil; replace the door seal if damaged (see the section titled "Door Seal Replacement" on page 4-16).

4. Clean and oil the door sealing surface on the body with SAE 10W oil.

Do not use grease on door faces or sealing surfaces.

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4-22


Maintenance 4

5. Lift the ram assembly into position, then slide the assembly horizontally onto the ram shaft foot (see Figure 4-18 on page 4-22).

6. Manually close the door of the preventer and replace the lock bars and retaining caps. See Figure 4-19.

Figure 4-19. Closing the Door Assembly

iiiGrease the support rods before and after opening and closing the door assembly. Clean and grease all the lock bars and grooves before closing the doors.

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Changing Pipe and Blind Ram RubbersNew One-piece Design

1. Clean the ram.

2. Insert a screwdriver or small pry bar under the end of the top seal and pry up and out of the ram block. (See Figure 4-20.)

Figure 4-20. Remove Top Seal and Face Seal

3. Remove the top seal until the pins are out of the face seal.

4. Remove the face seal.

5. Clean and lubricate the seal areas of the ram block with SAE 10W oil.

6. Install the new face seal.

7. Install the new top seal. Align the seal pins with the holes in the face seal. Tap the new seal into the block seal area.

Offset Rams for Dual CompletionsSingle offset rams have only one bore, which is offset to API centerline standards. This allows complete control of a dual completion when the second tubing string is to be run later.

Dual offset rams are furnished to API centerline standards for complete control of a dual completion when both tubing strings are run together.

Contact your local Shaffer sales representative for delivery dates. Be sure to specify the following when ordering:

BOP size and working pressure.

If single or dual offset rams are required.

Tubing OD and type of coupling so the coupling OD can be determined.

Casing size and weight so that the casing ID can be determined.

Tubing hanger centerline dimensions.

Pry up on each endto remove from face sealand ram block.

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4-24


Maintenance 4

Aluminum Drill Pipe RamsSince aluminum drill pipe has an oversize OD, these rams must have oversize bores in both the ram blocks and in the ram rubber extrusion plates. Contact your local NOV sales representative for part numbers and the following:

BOP size and working pressure.

Aluminum drill pipe OD.

Storing the LXT BOPLXT BOP Data LocationFor the location of BOP data, see Figure 4-21 on page 4-26.

Operation information is contained on plates mounted on the cylinder heads.

The body part number is located on the body.

Most components of the LXT BOP are stamped with their part numbers and other manufacturing data.

Cleaning and Storage of the LXT BOPA BOP should be cleaned immediately after it is taken out of service. Proper cleaning of a BOP before it is stored will increase its life significantly. If a BOP is in an active drilling program, this cleaning should be done approximately every three months or when the rig is between wells see the table titled "LXT Ram BOP Cleaning and Lubricating Instructions" on page 4-27.

1. Open the doors and remove the rams (see the section titled "Removal of Rams" on page 4-19).

Store rubber parts in their natural shape. Do not hang o-rings on nails or hooks.

Storage areas should be kept as dry as possible. Oil, grease or other fluids should be stored elsewhere to avoid spillage.

If storage is for a long duration, it is recommended that rubber parts be placed in sealed containers or be given a protective surface covering impervious to temperature or light, This will extend the shelf life.

iiiAlways give the serial number or assembly part numbers and size of the LXT BOP when ordering parts.

If the BOP is not flanged to a wellhead or securely fastened, open only one door at a time. The weight of two open doors may tip the BOP over.

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Rubber parts should be used on a first in, first out basis.

2. Inspect rubber parts according to the instructions listed below:

Each rubber part must be inspected before it is put into service.

Bend, stretch, or compress each part and look for cracks.

Observe if the rubber part has a hard skin or small cracks which may become chalky or bark like in appearance.

Figure 4-21. Data Information

iiiSome cracks are not obvious, but when the rubber part is bent, stretched or compressed, very minute cracks will become apparent.

Most components of the LXThave their part numbers stampedon them.

i

ASSY. NO.

DATE OF MFR.

ASSY. WT.

API PDC

SERIAL NO.

TRIM/TEMP. CLASS

OTLT. RG. GSKT.

OTLT. SIZE

BTM. RG. GSKT.

BTM. CONN.

TOP RG. GSKT.

TOP CONN.

WKG. PRESS.

BORE SIZEPREVENTER

BLOWOUT

PSI

IN

HYD. OPER. SYSTEM PRESS:

RATED WKG.

RECMD. OPER. PSI

PSI

132894

FOR CORRECT DOOR CLOSURE

ATTENTION

SLIDE DOOR COMPLETELY CLOSED,PULL DOWN SLIGHTLY ON CYLINDERHEAD TO ALLOW EASE OFINSTALLING LOWER LOCK BAR FIRSTTHEN LIFT SLIGHTLY ON CYLINDERHEAD TO INSTALL UPPERLOCK BAR

20020617

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4-26


Maintenance 4

* Do not use a wire brush to clean the ring groove. Install new ring gaskets dry.

NOTE: The lock bars and grooves may require a field application of the solid film lubricant Perma-Silk® G. This lubricant is an air drying, MoS2 based solid film lubricant with an epoxy binder system. The coating provides a low coefficient of friction with good corrosion resistance and is ideal for higher load carrying applications. (Technical data available on request)

LXT Ram BOP Cleaning and Lubricating Instructions

Part How to Clean Lubricants

1. LXT exterior

Steam or high pressure water

WARNINGDiesel fuel is a Flammable liquid. It will cause rubber goods to swell and deteriorate.

N/A

2. LXT interior Steam, high pressure water SAE-10W hydraulic oil or equivalent.

3. Studs/nuts Water, wire brushGrease specified in API 5A2.Moly Paste 503 (P/N 7403582)

4. Ring groove* Emery Cloth(Grease if not immediately in service).

5. Ram assemblySteam, high pressure water (See Warning)

Grease

6. Lifting eye threads Water, wire brushPack heavy grease to prevent corrosion.

7. Seat sealing surfaces

Emery cloth SAE-10W oil or equivalent.

8. Bore Steam, high pressure water Grease

9. Skids and side pads Steam, high pressure water, emery cloth Grease

10. Sealing areas (door face, door sealing surface)

Emery Cloth SAE-10W oil or equivalent.

11. Seals Wipe with damp cloth SAE-10W oil or equivalent.

12. Door seal grooves Emery cloth SAE-10W oil or equivalent.

13. Door slide rod Steam, high pressure water Grease

14. Lock bars and grooves

Steam, high pressure waterGrease, SAE-10W oil or equivalent. See Note.

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4-28


Page 5-1 of 18

Specifications and Parts Lists

Customer ServiceDirect all correspondence to one of the addresses provided below:

Mailing Address

National Oilwell Varco (NOV) P.O. Box 1473 Houston, Texas 77251, U.S.A.

Shipping Address

12950 West Little York Houston, Texas 77041

Phone: (713) 937-5000 Fax: (713) 937-5779

Repair Center

5100 N. Sam Houston Parkway West Houston, Texas 77086

Phone: (281) 569-3000

Parts Lists

Parts IdentificationAll parts required for maintenance or repair are available from NOV. Figures correspond to the parts list, which identifies each part by number. Using this part number and part name will ensure procurement of the proper part when ordering parts.

Ordering Replacement PartsWhen ordering replacement parts, please specify the following information:

Part name – list part name as called out on the applicable drawing

Part number – list part number as called out on the applicable drawing

Quantity – list the quantity needed

Serial number – list the serial number (if applicable) as shown on the nameplate

Recommended Spare PartsThe the table titled "Model LXT Manual Lock Spare Parts Kit (P/N 20024693)" on page 5-11 provides recommended spare parts coverage for the LXT preventer.

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5-1

Specifications and Parts Lists5LXT Ram Blowout Preventer


Exploded Views and Parts ListsFigure 5-1 on page 5-3 shows a cutaway view of the LXT Manual-Lock Door. The parts list is contained in the table titled "BOP and Door Components" on page 5-4 lists the parts.

BOP Characteristics

WELLBORE CHARACTERISTICS

Working Pressure5,000 psi (3,000 psi optional. See note below)

Max. Ram Size 5-1/2”

OPERATOR CHARACTERISTICS

Working Pressure 1500 psi (3,000 psi max.)

Volume to Open 0.32 Gallons per cylinder

Volume to Close 0.39 Gallons per cylinder

Closing Ratio 8.45:1

Piston Stroke 4.19 inches

Ram Shaft 1-5/8” Diam.

ESTIMATED WEIGHTS

Single, S X S, 2” flg outlets with rams

1,360 lbs.

Single, S X F, 2” flg outlets with rams

1,460 lbs.

Double, S x S, with rams 2,420 lbs.

Ram Assembly 30 to 42 lbs. per set

iiiNOV manufactures 5,000 psi 7 1/16" LXT blowout preventers and 3,000 psi working pressure 7 1/16" LXT blowout preventers. Both preventers are identical in operation. The difference between the two preventers is the API end connections, which limit the working pressure of the preventer to 3,000 psi.

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5-2


Specifications and Parts Lists 5

Figure 5-1. LXT Door Assembly Components

Locking Shaft

Cylinder Head

Manifold

Cylinder

Nut w/Washer

Stud

Q/D Nipple (x2)

O-Ring

Door Seal

Piston Shaft

Plug (x2)

O-Ring (x4) Pipe Plug

Piston Seal

Screww/Washer (x2)

Ram ShaftSeal Assembly

O-Ringw/Backup (x2)

Piston ShaftSeal

Door

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BOP and Door Components

Item No.

P/N Description Qty

1 — DOOR, 7-5M LXT, W/ PLASTIC INJECTION 1

2 20022087 CYL, 7-5M LXT 1

3 20022086 SHAFT, PSTN, 7-5M LXT 1

4 20022088 SHAFT, LKG, 7-5M, LXT 1

5 20022653 MNFD, 7-5M LXT 1

6 20022084 CYL, HD, FM, 7-5M LXT 1

7 20022103 SEAL, DOOR, 7-5M, LXT 1

8 1500390 NIPPLE, Q/D, 3/8”, CHECK VLV TYPE, SAE MALE 2

9 5019416 O-RING 2

10 030928 O-RING, SPG 2

11 032008 RG, BACKUP 2

12 20022403 SEAL, POLYPAK, 2-1/16” OD X 1-11/16” ID”, .375 DEEP 1

13 032006 SEAL, PSTN, 4-5/8”ID X 5”OD X 3/16”CS 1

14 185174 RSSA, 1-5/8” SHAFT 1

15 030653 O-RING 4

16 20022704 DU BRG #16DU24 2

17 020009 NUT, HX, HVY, 7/8"- 9UNC, A194Gr2H, BLK FINISH 4

18 20022090 STUD, 7-5 LXT 4

19 065008 PLUG, SKT HD, HX, 1/4" NPT 1

20 20020275 PLUG, PIPE, SKT HD, 1/4"- 18NPT x 1/16" DIA 1

21 066502 PLUG, SKT HD, HX, 1/2" NPT, ALLOY STL, CAD PLTD 2

22 8010201 SCREW, HHC, 1/2"- 13UNC x 3/4" LG, SS 2

NS 20025967 PLUG, PIPE, SKT HD,1/4"-18NPT x 1/32”DIA 1

23 20001174 WSHR, FL, 1/2", 316 SS 2

24 025046 WSHR,LK, SPLIT, 7/8"DIA, CAD PLTD, CARBON STL 4

25 1500389 CPLR, Q/D, 3/8”, CHECK VLV TYPE, SAE FEMALE 2

26 20022085 BAR, SLIDER 2

27 20022650 CAP END, SLIDER BAR 2

28 8002856 SCREW, SHC, 3/8” UNC X 3/4” LG 2

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5-4



Note: Quantity shown is for one (1) set of door components.

Figure 5-2. LXT BOP and Door Components

29 20022089 LOCK, BAR 2

30 20021470 KNOB, HAND 4

31 066504 PLUG, PORT 1

31A 2007077 PLUG, PACKING

32 050000 PKG, STICK, INJECTION, PLASTIC 1

33 20023094 VLV ASSY, CHECK, 3/4-10 UNC-2A 1

NS 8130121 SCREW, DRV, #6 x 1/4” LG, .120” HOLE SIZE, SS, RD HD 4

NS 185181 HANDLE, F/7-5M MANUALLY OPERATED BOP 1

NS 20020261 HAMMER, SLIDE, 24” LG X 5/8” - 1/8” THREAD END 1

NS 050193 RG GSKT, R-24, CAD PLTD, OVAL 4

NS 050202 RG GSKT, R-46, CAD PLTD, OVAL 2

NS 064036 PROTECTOR, FLG, STDD, 2-5M 4

NS 064078 PROTECTOR, STDD, 7-5M (PLASTIC) 2

NS 20024128 BORE AND GROOVE PROTECTOR 2

See foldout.

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14

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LXT Ram BOP Revision D

20

21

618

11

2

1011

13

4

3

155

16

1

7

26

20

12

19

9

25

22

23

30

29

27

28

BOP Body

10

Figure 5-2. LXT BOP and Door Components

24 17

8

31

32

33



* Quantity shown is for 1 assembly. Note that a single model requires 2 assemblies, a double model requires 4 assemblies. Increase quantities as required.

Figure 5-3. LXT Ram Shaft Seal Assembly

Model LXT Ram Shaft Seal Assemblies

Item No. Description Qty. Part Number

— Ram Shaft — 1-5/8”

— Assembly Number — 185174

1 Retainer, Ring 1 141365

2 Holder, Ring, Wiper 1 185172

3 Scraper, Ring 1 032005

4 Seal, Polypak 1 032004

5 Adapter, Packing 1 185173

6 Seal, Polypak, Deep 1 032009

OPERATOR

BOP BODY

Plastic Injection Hole

1

2

3

4

5

6

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5-6



* Quantity shown is for 1 assembly. Note that a single model requires 2 assemblies, a double model requires 4 assemblies. Increase quantities as required.

Figure 5-4. LXT Piston Shaft Seal Assembly

Model LXT Cylinder Head/Piston Shaft Seal Assembly

Item No. Description Qty. Part Number

3 Piston Shaft — 1-5/8”

12Cylinder Head/Piston Shaft Seal

1 20022403

Piston Shaft

Cylinder Head

PistonShaft Seal

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Figure 5-5. LXT Pipe Ram Assembly

Rams for Model LXT Blowout Preventers

BOP Ram (Type or Model)

Working Pressure Bore Assembly Current Components

Regular Duty

Support Drill Type

Rubber Block

3,000/5,000 psi LXT 7" LXT LXT LXT LXT

Ram Block

Top Seal

Face Seal

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5-8



* 3,000/5,000 LXT BOP uses Chasovoy™ Ram assemblies.

3,000/5,000 psi 7-1/16 LXT Pipe Ram Assembly *

Pipe OD Complete Assembly

Ram Block Face Seal Assembly

Top Seal Assembly

7 1/16", 3,000/5,000 psi, (180 mm)

CSO 722224 722156 722183 722181

11/4", 32 mm 722259 722285 722286 722181

1.315", 33 mm 722225 722157 722184 722181

1.660", 42 mm 722226 722158 722185 722181

1.900", 48 mm 722227 722159 722186 722181

2 1/16", 52 mm 722228 722160 722187 722181

2 3/8", 60 mm 722229 722161 722188 722181

2 7/8", 73 mm 722230 722162 722189 722181

3 1/2", 89 mm 722231 722163 722190 722181

4", 102 mm 722232 722164 722191 722181

4 1/2", 114 mm 722233 722165 722192 722181

5", 127 mm 722234 722166 722193 722181

5 1/2", 140 mm 722235 722167 722194 722181

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Figure 5-6. LXT Multi-Ram Assembly (One Piece Design)

A

A Section A-A

Face Seal Top Seal

Block

LXT Multi-Ram Assemblies

Pipe Range (inches) Complete Assembly

Rubber Assembly

Block Face Seal Top Seal

2-3/8 to 3-1/2 20002933 20002936 20002934 20002937 722181

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5-10



Model LXT Manual Lock Spare Parts Kit (P/N 20024693)

P/N Description Qty

185174 RSSA, 1-5/8” SHAFT 2

030653 O-RING, 70-75 DURO 8

032008 RG, BACKUP 4

5019416 O-RING, 70 DURO 8

20022403 SEAL, POLYPAK, 2-1/16” OD X 1-11/16” ID, .375” DEEP 2

050000 PKG, STICK, INJECTION, PLASTIC 2

032006 SEAL, PSTN, 4-5/8”ID X 5”OD X 3/16”CS 2

030928 SPRING O-RING 4

20022103 DOOR SEAL 2

LXT Door Fastener (Hardware) Kit (P/N 20025183)

P/N Description Qty

020009 NUT, HX, HVY, 7/8"- 9UNC, A194Gr2H, BLK FINISH 4

20022090 STUD, 7-5 LXT 4

065008 PLUG, SKT HD, HX, 1/4" NPT 1

20020275 PLUG, PIPE, SKT HD, 1/4"- 18NPT x 1/16" DIA 1

066502 PLUG, SKT HD, HX, 1/2" NPT, ALLOY STL, CAD PLTD 2

8010201 SCREW, HHC, 1/2"- 13UNC x 3/4" LG, SS 2

207077 SCREW, SET, SKT HD, 3/4”-10UNC 1

20001174 WSHR, FL, 1/2", 316 SS 2

025046 WSHR,LK, SPLIT, 7/8"DIA, CAD PLTD, CARBON STL 4

066504 PLUG, SKY HD, HX, 3/4” NPT 1

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Handwheel Assembly (Optional)

Figure 5-7. Handwheel Assembly

1 1

2

3 456 67

8

LXT Handwheel Assembly (P/N 185599)

Item Number

Part Number

Description Qty

1 722151 HANDWHEEL 1

2 185630 UNIVERSAL JOINT 1

3 185631 SPACER SLEEVE 1

4 185634 DEEP SOCKET WRENCH 1

5 051330 RETAINER RING 1

6 8001458 HEX HEAD CAP SCREW 2

7 8020187 HEX NUT 2

8 8001352 HEX HEAD CAP SCREW 1

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5-12



API Nuts

Normal Temperatures

Heavy Hex Nuts Black A194, Gr 2H

Cad. Plated A194, Gr 2H

Low Temperatures A194 Gr 4 or 7

1/4" - 20 UNC 020018 020300 020301

5/16" - 18 UNC 020019 020304 020305

3/8" - 16 UNC 020020 020308 020309

1/4" - 14 UNC 020021 020312 020313

1/2" - 13 UNC 020006 020316 020317

9/16" - 12 UNC 020007 202320 020321

5/8" - 11 UNC 020008 020324 020325

3/4" - 10 UNC 020004 020328 020329

7/8" - 9 UNC 020009 020333 020334

1" - 8 UNC 020001 020338 020339

1 1/8" - 8 UN 020003 020343 020344

1 1/4" - 8 UN 020010 020347 020348

1 3/8" - 8 UN 020011 020351 020352

1 1/2" - 8 UN 020000 020356 020357

1 5/8" - 8 UN 020012 020361 020362

1 3/4" - 8 UN 020013 020366 020367

1 7/8" - 8 UN 020014 020371 020372

2" - 8 UN 020015 020376 020377

2 1/4" - 8 UN 020016 020381 020382

2 1/2" - 8 UN 020017 020386 020387

2 3/4" - 8 UN 020034 020391 020392

3" - 8 UN 020035 020396 020397

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Tap End Studs for API Flanges

Normal Temperature Low Temperature

Tap End Studs Black A193, B7 Cad. Plated A193, B7

A320, L7

1/2" x 2 3/4" 011000 012050 012051

5/8" x 3 1/2" 011001 012055 012056

3/4" x 3 3/4"3/4" x 4"

011002

011003

012060

012065

012061

012066

7/8" x 4"7/8" x 4 1/4"7/8" x 4 1/2"

011004

011005

011006

012070

012075

012080

012071

012076

012081

1" x 4"

1" x 4 3/4"1" x 5"

011037

011007

011008

—

012085

012090

—

012086

012091

1 1/8" x 5 1/4"

1 1/8" x 5 1/2"

1 1/8" x 5 3/4"

1 1/8" x 7"

011009

011010

011011

011036

012095

012100

012105

012110

012096

012101

012106

012111

1 1/4" x 6"

1 1/4" x 6 1/4"

011012

011013

012115

012120

012116

012121

1 3/8" x 6 1/2"

1 3/8" x 6 3/4"

1 3/8" x 7 1/4"

1 3/8" x 7 1/2"

011014

011015

011016

011017

012125

012130

012135

012140

012126

012131

012136

012141

1 1/2" x 7 1/4"

1 1/2" x 7 3/4"

1 1/2" x 8 1/4"

1 1/2" x 8 1/2"

011019

011020

011021

011022

012145

012150

012155

012160

012146

012151

012156

012161

1 5/8" x 8 1/4"

1 5/8" x 8 1/2"

1 5/8" x 13 1/8"

011023

011024

152150

012165

012170

012175

012166

012171

012176

1 3/4" x 8 1/4"

1 3/4" x 9 1/2"

011034

011025

012180

012185

012181

012186

1 7/8" x 9 1/2"

1 7/8" x 10 1/4"

1 7/8" x 10 3/4"

1 7/8" x 11 1/4"

011026

011018

011033

011027

012190

012195

012200

012205

012191

012196

012201

012206

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5-14



2" x 10 1/4"

2" x 11 1/4"

2" x 11 1/2"2" x 12"

011028

011035

011029

011030

012210

012215

012220

012225

012211

012216

012221

012226

2 1/4" x 12 1/4"

2 1/4" x 13 1/4"

2 1/4" x 14 1/4"

2 1/4" x 15 1/2"

012240

012246

011031

011032

012241

012247

012230

012235

012242

012248

012231

012236

Tap End Studs for API Flanges (Continued)


Tap End Studs Black A193, B7 Cad. Plated A193, B7

A320, L7

API Ring Gaskets

Flange R or RX Number

R (Oval) RX

Working Pressure (psi)

Nominal Size and Bore

Soft Iron Cad. Plated

Type 304 SS

Rubber Coated


Type 304 SS

2,000 3,000/5,000

2 1/16"

2 1/16"

2324

050192050193

050567050568

050420050421

050376050380

050603050604

2,000 3,000/5,000

2 9/16"

2 9/16"

2627

05019450195

050569050570

050422050423

050381050382

050606050607

2,000/3,000 5,000

3 1/8"

3 1/8"

3135

050196050197

050571050572

050424050426

050383050384

050608050609

2,000/3,0005,000

4 1/16

4 1/16"

3739

050198050199

050573050574

050427050428

050385050386

050610050611

2,000/3,0005,000

7 1/16"

7 1/16"

4546

050201050202

050577050578

050430050431

050373050389

050614050615

2,000/3,0005,000

9"9"

4950

050203050204

050580050581

050433050432

050390050391

050617050618

2,000/3,0005,000

11"11"

5354

050205050206

050582050583

050435050436

050377050392

050619050620

2,000/3,0005,000

13 5/8" 14"

5763

050207050208

050584050585

050437050442

050393050394

050621050622

2,0003,000

16 3/4"

16 3/4"

65

66

050209

050210

050586

050587

050443

050444

050395

050396

050623

050624

5-15www.nov.com



* For obsolete 16 3/4", 5,000 psi WP 7,500 psi test flange.

2,000 3,000

17 3/4"

17 3/4"

69

70

050306

050307

050588

050589

050445

050446

—

—

050625

050626

2,000 3,000

21 1/4"

20 3/4"

73

74

050211

050156

050590

050591

050448

050449

050397

050398

050627

050628

API Ring Gaskets (Continued)

Flange R or RX Number

R (Oval) RX


Nominal Size and Bore


Type 304 SS

Rubber Coated


Type 304 SS

API BX Ring Gaskets

Flange


Nominal Size

Soft Iron BX Number

Type 304 Cad. Plated

Stainless Steel

10,000, 15,000, 20,000

1 13/16"

2 1/16"

2 9/16"

151

152

153

050352

050353

050354

050644

050645

050646

10,000, 15,000

3 1/16"

4 1/16"

7 1/16" 9"11"

154

155

156

157

158

050355

050366

050356

050227

050350

050647

050648

050649

050650

050651

10,0005,00013 5/8"

13 5/8"

159

160

050357

050462

050652

050653

5,0005,000/10,00016 3/4"

16 3/4"

161*

162

050536

050661

050654

050662

5,00010,00018 3/4"

18 3/4"

163

164

050663

050665

050664

050666

5,00010,00021 1/4"

21 1/4"

165

166

050667

050690

050668

050691

www.nov.com

5-16



All Thread Studs and Nuts for API Flanges

All Thread Studs With Two Nuts Each


Black A193, B7

Cad. Plated A193, B7

A320, L7

1/2" x 4 1/2" 011440 011442 011444

5/8" x 4 1/2"5/8" x 5 3/4"5/8" x 6"

011449

011458

011467

011451

011460

011469

011453

011462

011471

3/4" x 4"3/4" x 5 1/4"3/4" x 6"3/4" x 7"

011476

011485

011496

011505

011478

011487

011498

011507

011480

011489

011500

011509

7/8" x 4 1/2"7/8" x 5 1/2"7/8" x 6"7/8" x 7 1/2"7/8" x 8"

011514

011523

011532

011543

011552

011516

011525

011534

011545

011554

011518

011527

011536

011547

011556

1" x 6"

1" x 6 1/2"1" x 7"

1" x 7 1/4"

1" x 7 3/4"

1" x 9 1/4"1" x 10"

011561

011570

011579

011588

011606

011615

—

011563

011572

011581

011590

011608

011617

011991

011565

011574

011583

011592

011610

011619

—

1 1/8" x 7"

1 1/8" x 7 1/2"

1 1/8" x 8 1/4"

1 1/8" x 9"

011624

011633

011644

011655

011626

011635

011646

011657

011628

011637

011648

011659

1 1/4" x 8"

1 1/4" x 8 3/4"

1 1/4" x 9 1/4"

1 1/4" x 12"

011664

011673

011682

011691

011666

011675

011684

011693

011668

011677

011686

011695

1 3/8" x 9"

1 3/8" x 9 1/2"

1 3/8" x 10 1/4"

1 3/8" x 10 3/4"

1 3/8" x 12 1/2"

1 3/8" x 13 1/4"

011700

011709

011720

011729

011738

011747

011702

011711

011722

011731

011740

011749

011704

011713

011724

011733

011742

011751

1 1/2" x 10 1/4"

1 1/2" x 11 1/4"

1 1/2" x 13"

011756

011765

011776

011758

011767

011778

011760

011769

011780

5-17www.nov.com



1 5/8" x 11"

1 5/8" x 11 3/4"

1 5/8" x 12"

1 5/8" x 12 1/2"

1 5/8" x 17"

011787

011796

011805

011814

011825

011789

011798

011807

011816

011827

011791

011800

011809

011818

011829

1 3/4 x 12 1/4"

1 3/4 x 14 1/4"

1 3/4 x 15"

011836

011845

011856

011838

011847

011858

011840

011849

011860

1 7/8" x 13 3/4"

1 7/8" x 14 1/2"

1 7/8" x 15 3/4"

1 7/8" x 17 1/2"

1 7/8" x 18 1/2"

011867

011876

011887

011898

011909

011869

011878

011889

011900

011911

011871

011880

011891

011902

011913

2" x 14 1/2"

2" x 17 1/4"

2" x 17 1/2"

2" x 18 1/2"

2" x 19 1/4"

011918

011927

011938

011947

011958

011920

011929

011940

011949

011960

011922

011931

011942

011951

011962

2 1/4" x 22 1/4" 011969 011971 011973

2 1/2" x 24 1/4" 011980 011982 011984

All Thread Studs and Nuts for API Flanges (Continued)

All Thread Studs With Two Nuts Each


Black A193, B7

Cad. Plated A193, B7

A320, L7

www.nov.com

5-18

BOP lx (2)

Documents

national oilwell

blk finish

api centerline

threaded member

month preventive

api thread

ram shaft

door sealing