JAR-KING 1 Operations Manual

Baker Hughes INTEQ

JAR-KING 1Tool Description

and Operations Manual(43/4" - 91/2" Tools)

750-500-028 Rev. A September 1994

Baker Hughes INTEQTechnical Publications Group2001 Rankin RoadHouston, TX 77032USA713-625-4415

This manual is provided without any warranty of any kind, either expressed or implied. The information in this document is believed to be accurate; however, Baker Hughes INTEQ will not be liable for any damages, whether direct or indirect, which results from the use of any information contained herein.

Table of Contents

Table of Contents

JAR-KING I OverviewIntroduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Principles of Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1JAR-KING I Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Tool Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Torque Transmission System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Jarring System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Locking System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Calculation of Required Pull . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6For Example: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Calculation of Required Minimum Pull. . . . . . . . . . . . . . . . . . . . . .7

Tool Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Lower Part of the Bottom Hole Assembly (Under Compression). . . . . . . . . . . . . .9Upper Part of the Bottom Hole Assembly (Under Tension) . . . . . . . . . . . . . . . . . .9Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9Operation of the Locking System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Relocking the Jar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11Changing the Adjusting Shells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Jarring Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13Bumping Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Moderate Bumping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14Heavy Duty Bumping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Tool Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15Checking the Jarring System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Operations Manual i750-500-028 Rev. A / September 1994 Confidential

Table of Contents Publication Style Guideii Baker Hughes INTEQConfidential 750-500-028 Rev. A / September 1994

Baker Hughes INTEQ750-500-028 Rev. A / September 1994 Confidential

the stuck drillstring.

The jarring blow can be repeated, if necessary, to deliver a rapid sblows when desired. To run the JAR-KING I in the optimum positabove the stuck point, the JAR-KING I can be used in tension (aboeries of ion ve the Chapter1

1

JAR-KING I Overview

The JAR-KING I serves as a drilling jar and is installed in the drillstring to free a stuck drillstring. The drilling jar is used for both jarring up and bumping down.

IntroductionA drilling jar has become standard in the drillstring. Immediate jarring to free the stuck drillstring without any delay can save high fishing costs. Also, the danger of more intensive sticking is reduced through the rapidly initiated jarring action.Falling cuttings, collapsing or expanding formations, junk in the hole, differential sticking or other reasons can cause the drillstring to become stuck. In order to avoid longer breaks of drilling, which are usually caused by fishing work, the placement of the drilling jar is highly economical in drilling operations. Furthermore, additional safety is provided for the drillstring.

Principles of DesignThe JAR-KING I can be used either in a jarring-up or bumping-down mode. To avoid unintentional jarring or bumping, it has a locking feature. Only after a certain preadjusted overpull has been applied, the JAR-KING I is in an active jarring/bumping mode.The main element of the jar is the hydraulic jarring system, whereby energy is stored in the drillstring as potential energy by overpull. After a certain time, depending upon the amount of overpull, the jar is released and abruptly sets free the stored energy, imparting a powerful jarring blow to 1

JAR-KING I Drilling Jarneutral point of the BHA), or in compression (below the neutral point of the BHA). The locking device avoids uncontrolled jarring while drilling, tripping or making connections, for more safety in the hole, and reduced wear at the jar.

JAR-KING I FeaturesThe JAR-KING I has the following features:

Easy to operate

Double action design for jarring up and bumping down Impact control over the whole working range, by overpull only very

light or maximum capacity blows may be created

Maximum temperature 392F (200C) Quick resetting of the jarring system for delivering a rapid series of

blows

Mechanical locking system avoids uncontrolled jarring while drilling, tripping, or making connections

Tool DescriptionThe JAR-KING I is manufactured from high quality SAE 4140/4145 steel. The threads are made to API specifications, inspected by Magna-Flux, and phosphate coated. The thread roots of the tool joints are cold rolled upon request. All movable parts are running in oil, refer to Note, and the sealing surfaces are coated with a special hardfacing, which has a high corrosion resistance against all types of mud.

Note: 4-3/4" JAR-KING I with open spline area.

The tool consists of three major elements (see foldout drawing). These elements include:

Torque transmission system

Jarring system

Locking system

Torque Transmission SystemLocated in the upper part of the tool, the torque transmission system features replaceable spline inserts working in oil. See Note and Figure 1. An axial stroke, depending on tool size, is provided.Baker Hughes INTEQ 2750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarNote: 4-3/4" JAR-KING I with open spline area. Splines are not replaceable.

The torque transmission system is sealed at the lower end by Compensating Piston 1, to equalize the internal pressure to the mud pressure, and compensate for any change of oil volume.

Jarring SystemThe JAR-KING I is designed for both jarring-up and as well as bumping- down. The jarring system is located below the spline assembly. It works totally in an oil bath and is sealed below by the Compensating Piston II. Intensity of impact is controlled from the rig floor by the amount of jarring load (overpull) applied.Figure 2 shows the principle of the hydraulic jarring system in which an axial sliding Valve is sealed to Bowl I and pressed onto the Valve Seat when it is pulled. While the Valve is being pulled, the oil from the Upper

Figure 1. Torque Transmission System. The Torque Transmission System is located in the upper part of the tool.Baker Hughes INTEQ 3750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarChamber must flow into the Lower Chamber, passing through the very narrow annulus between the Valve and Bowl I.

Therefore, the valve movement requires a certain time, depending on the amount of overpull, before it reaches the upper part of Bowl I. Here, the enlarged bore area allows the oil to bypass the Valve, resulting in an abrupt release and acceleration of Valve and Mandrel I, by energy stored in the drillstring. The upward blow is created by hitting the Hammer against the Anvil. To achieve quick resetting, the Valve is designed so that the oil can bypass underneath it and thus does not offer resistance while resetting.

Downward bumping as shown in Figure 3 will be established by hitting with the Male Spline (Bumping Nut) against the upper shoulder of the Seal Cap after dropping the drillstring.

Figure 2. Hydraulic Jarring System for Jarring Up.The JAR-KING I is designed for jarring- up and bumping down.Baker Hughes INTEQ 4750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarLocking SystemThe JAR-KING I is equipped with a mechanical locking system to avoid uncontrolled jarring as well as premature wear of the jar. See Figure 4.By locking the jar, it is possible to run the tool either under compression or under tension.

The locking device consists of an Arresting Sleeve, Tapered Pressure Ring, and Steel Balls, engaging both, and thereby locking Mandrel II against the Locking Bowl. When activating the tool, by exceeding the unlocking force, the Tapered Pressure Ring travels downwards, compressing a set of Disc Springs. The Steel Balls are displaced to the Locking Bowl, thus releasing the Arresting Sleeve as well as Mandrel II. The amount of unlocking force is determined by the thickness of the Adjusting Shells defining the distance

Figure 3. Mechanical Components for Bumping Down. The JAR-KING I is also designed for bumping down.Baker Hughes INTEQ 5750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling Jarof both parts. If the requested unlocking force is different from the preset adjustment, the proper set of Adjusting Shells has to be selected and installed before tripping in. Once the jar has been unlocked downhole, it remains open in the working mode. This is automatically accomplished to allow continuous jarring or bumping without relocking the tool again.

Calculation of Required PullThe minimum pull required to unlock the JAR-KING I is given by the calculation that follows. The operator must bear in mind the pull capacity of the rig, downhole conditions, and drillstring configuration when selecting the Adjustable Shells. The changing of Adjustable Shells is carried out according to instructions given in the Tool Box.

Figure 4. Main Parts of the Locking System. The JAR-KING I is equipped with a mechanical locking system to avoid uncontrolled jarring as well as premature wear of the jar.Baker Hughes INTEQ 6750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarFor Example:A 6-1/4" JAR-KING I is installed in a BHA with a BHA weight of 200 kN (44,900 lbf) below and 800 kN (179,900 lbf) above. Tools equipped with Adjustable Shells for 300 kN (67,000 lbf) unlocking force. Pressure drop below the jar is equal to: p = 40 bar (580 psi).

Calculation of Required Minimum Pull

Note: This method does not consider wall friction.

Drillstring weight in mud above jar (mass-force) 800 kN (179,900 lbf)+Unlocking force (as adjusted on tools) (Table 1) 300 kN (67,000 lbf)- Pump opening force (see note) (see Table 2) 29 kN (6,000 lbf) Minimum pull required 1071 kN (240,900 lbf)

Note: Pump opening force tends to open the jar due to hydraulic action of mud under pressure. It applies additional load on the locking system and reduces required pull.

Table 1: Identification of Adjusting ShellsMarker Bore Indents

Corresponding to Unlocking Forces

Tool Sizes:6-1/4"6-3/4"

Tool Sizes: 8-1/2"

Tool Sizes:9"10"

kN 1000 lbf kN 1000 lbf kN 1000 lbf

200 45

300 67 300 67 300 67

400 90 400 90 400 90

500 112 500 112

600 135

Marker Bore Indents Corresponding to Unlocking Forces

Tool Size:4-3/4"5"

kN 1000 lbf

150 34000

200 45000

250 56000Baker Hughes INTEQ 7750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarTable 2: Hydraulic Pump Opening Force

Pressure Drop Below Jar

6-1/4"6-3/4" 8-1/2" 9"10"

bar PSI kN 1000 lbf kN 1000 lbf kN 1000 lbf

20 290 14 3 17 4 21 5

40 580 29 6 34 7 41 9

60 870 43 9 52 11 62 14

80 1160 57 13 69 15 82 18

100 1450 71 16 86 19 103 23

120 1740 86 19 103 23 123 27

140 2030 100 22 121 27 144 32

150 2180 107 24 129 28 154 34

160 2320 114 25 138 30 164 36

170 2470 121 27 147 32 174 38

180 2610 128 28 155 34 185 41

190 2760 135 30 164 36 195 43

200 2900 143 32 172 38 205 45

210 3050 150 33 181 40 215 47

Pressure Drop Below Jar

4-3/4"5"

bar PSI kN 1000 lbf

20 290 8 2

40 580 17 4

60 870 25 6

80 1160 33 8

100 1450 42 9

120 1740 50 11

140 2030 59 13

150 2180 63 14Baker Hughes INTEQ 8750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarTool PlacementThe JAR-KING I may be run under compression or tension. Avoid placement in the neutral zone. Figure 5 shows the possible placements of the JAR-KING I in the drillstring.

Lower Part of the Bottom Hole Assembly (Under Compression)

The jar should always be installed at least one drill collar above the top stabilizer. See Figure 5. The drill collar between the stabilizer and the jar will give the added safety that the jar will not get stuck itself, for instance by falling cuttings. When running a shock absorber in the drillstring, the jar should always be placed above the shock absorber.

Upper Part of the Bottom Hole Assembly (Under Tension)If differential sticking of the drill collar is expected, the jar should be positioned high up in the bottomhole assembly. See Figure 5. The advantage of this configuration is the ability to jar with the tool after becoming stuck by differential sticking. The disadvantage is the large distance between the jar and the stuck point when the bit or stabilizers become stuck, which reduces the effective jarring impact.

OperationAll thread connections of the JAR-KING I are made up in the workshop and properly torqued. The jars are sent to the rig site in the locked position and are equipped with adjustable shells according to the unlocking force given in Table 3, if no differing adjustment of the locking system has been requested.

Table 3: Standard Adjustment of Locking SystemTool Sizes Unlocking Forces

inch kN 1000 lbf

4-3/4"5" 200 45

6-1/4"6-3/4" 300 67

7-3/4"8-1/2" 400 90

9"10" 400 90Baker Hughes INTEQ 9750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarFigure 5. Possible Placement of the JAR-KING I in the Drillstring. The JAR-KING I may be run under compression or under tension. Avoid placement in the neutral zone.Baker Hughes INTEQ 10750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarThe box and pin connection of drill collars connected to the jar should be made up to the recommended torque according to API specifications. Chain tongs or collar clamps must not be placed around the hardfaced Male Spline and the flex area of the Flex Joint.

Operation of the Locking SystemBefore running the tool, the required pull for unlocking has to be calculated. If the unlocking force has to be changed, the Adjusting Shells are exchanged with the proper set of shells placed in the tool box. After getting stuck in the hole, the locking system will be unlocked by exceeding the calculated pull, and the jar is ready for jarring. Once the jar has been unlocked, it remains in the working mode. Relocking can only be done during the next round trip on the rig floor.

Relocking the JarThe following procedure is for relocking the jar. Refer to Figure 6.

1. Set the jar into the slips beneath the Locking Bowl.2. Break-out the thread connection Adjusting Bowl/Locking Bowl,

and unscrew the connection approximately 20 to 30 mm (.75 to 1.25 inch).

Note: Do not place the tongs or slips on the Flex Joint or hardfaced area of the Male Spline.

3. Close the jar by weighting it with one or two drill collars. Make sure there is no stand-off between Bumping Nut and Seal Cap.

4. Make-up thread connection Adjusting Bowl/Locking Bowl, with a torque value from Table 4.

5. Pull the jar out of the slips to check the locking mode. Standoff between Bumping Nut and Seal Cap must be less than 20 mm (.75 inch).

Changing the Adjusting ShellsIn the case when the locking system needs adjustment, suitable tool boxes, containing optional Adjusting Shells are available. Proceed with the following instructions:

1. Set the jar into the slips beneath the Locking Bowl. See Figure 6.2. Break-out the thread connection Adjusting Bowl/Locking Bowl

and unscrew the connection approximately 40 to 50 mm (1.50 to 2.0 inches).Baker Hughes INTEQ 11750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling Jar3. Remove the Adjusting Shells and insert the new set for the required unlocking force. Make sure there is no stand-off between Bumping Nut and Seal Cap.

4. Make-up the thread connection Adjusting Bowl/Locking Bowl with torque value from Table 4.

5. Check the locking mode as described previously.

Figure 6. Relocking the Jar. The jar is set into the slips beneath the locking bowl.Baker Hughes INTEQ 12750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarJarring UpThe jarring impact depends on the energy stored in the drillstring, which results from the applied overpull (jarring load). The maximum jarring load, shown in Table 5, should not be exceeded.

Following are instructions for jarring up:1. Pull the drillstring to open the locking system by overpull to the

appropriate locking. Maintain this overpull until an upward blow is noticed, signifying that the tool is unlocked. Increase the overpull if necessary to ensure that the tool is unlocked.

Note: If the jar has been run under tension without being locked, close the jar first by dropping the drillstring.

2. Pull the drillstring to the desired jarring load.3. Set the brake and wait for the blow. The jarring time depends on

the amount of overpull. Jarring time should not exceed 10 minutes.

4. To repeat jarring, reset the jar by lowering the drillstring. Follow-up with Steps 2 and 3.

Table 4: Make-up Torque for Adjusting Bowl/Locking Bowl ConnectionTool Sizes Make-up Torque

inch kNm 1000 ft lbf

4-3/4"5" 11.0 8.1

6-1/4"6-3/4" 20.7 15.3

7-3/4"8-1/2" 50.0 36.9

9"10" 83.0 61.2

Table 5: Maximum Recommended Jarring LoadTool Sizes Maximum Recommended Jarring Load

inch kN 1000 lbf

4-3/4"5" 360 81

6-1/4"6-3/4" 600 135

7-3/4"8-1/2" 860 193

9"10" 860 193Baker Hughes INTEQ 13750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarBumping DownThe intensity of the downward impact can be controlled by the bumping stroke. The latter can be chosen by the operator for moderate or heavy duty bumping.

Moderate BumpingFollowing are instructions for Moderate Bumping.

1. Pull the drillstring to open the locking system as described under the Jarring Up section.

2. Close the jar and mark this point on the kelly.3. Lift the drillstring to an overpull above that required earlier.

Maintain this overpull for a few seconds. This opens the jar approximately 200 mm (8 inches).

4. Release the brake allowing the drillstring to drop rapidly. Stop the drillstring at the point marked on the kelly.

5. To repeat moderate bumping, repeat Steps 3 and 4.

Heavy Duty BumpingFollowing are instructions for Heavy Duty Bumping.

1. Pull the drillstring to open the locking system, as described earlier.

2. Close the jar and mark this point on the kelly.3. Overpull the drillstring to a value above that required from Step

1. Hold this load for approximately half a minute. During this time the jar will continue to open. This results in a longer bumping stroke, which enables the build-up of a heavy duty downward blow.

4. Release the brake and allow the drillstring to drop. Stop the drillstring at the point, which is marked on the kelly.

5. To repeat Heavy Duty Bumping, repeat Steps 3 and 4.Baker Hughes INTEQ 14750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarTool CheckingGeneral Instructions

During each round trip, the shoulders of the Bumping Nut and Seal Cap should be visually inspected for deformation. In addition, the hardfaced surface of the Male Spline should be checked for any wear if the jar had been under work. If excessive wear is apparent, the tool must be replaced.

Checking the Jarring SystemNo check is necessary if the tool has not been opened. If the tool comes out of the hole in the opened position, follow up with the steps below:

1. Close the tool.

2. Lift the tool out of the slips.

3. The tool will open. When approximately 200 mm (8 inches) between the Seal Cap and Bumping Nut is reached, the opening velocity will slow down. In this case, the tool is ready for further use.

SpecificationsThe following tables list the specifications for different sized JAR-KING I tools.

Table 6: JAR-KING I Specifications (Part 1)Tool Size Approx.

Total Weight

Tool Length Jarring Stroke

Total Stroke

Range OD ID

inch inch mm inch mm kg lbs m ft mm inch mm inch

4-3/45 4-3/4 121 2 51 680 1500 9.8 32 170 6.7 762 30

6-1/46-3/4

6-1/4 159 2-1/4 57 1100 2400 9.8 32 235 9.2 762 30

7-3/48-1/2

8 203 2-1/2 64 2000 4400 9.8 32 255 10 762 30

910 9-1/2 241 2-13/16 71 2800 6200 9.8 32 255 10 762 30Baker Hughes INTEQ 15750-500-028 Rev. A / September 1994 Confidential

JAR-KING I Drilling JarTool Size Maximum Recommend Jarring Load

Maximum RecommendBu

mping Load

Ultimate Test Load After

JarringRange OD ID

inch inch mm inch mm kN 1000 lbf

kN 1000 lbf

kN 1000 lbf

4-3/45 4-3/4 121 2 51 360 81 200 45 1000 225

6-1/46-3/4 6-1/4 159 2-1/4 57 600 135 350 78.6 3000 670

7-3/48-1/2 8 203 2-1/2 64 860 193 400 89.9 5200 1170

910 9-1/2 241 2-13/16 71 860 193 500 112.3 7400 1660

Tool Size Maximum Operating

Torque

Locking System

Range OD ID Unlocking Force Range

Make-up Torque

Adjusting Bowl /Locking

Bowl

inch inch mm inch mm kNm kft-lb kN 1000 lbf

kNm 1000 ft lbf

4-3/45 4-3/4 121 2 51 8.1 6 150 200 250

34 45 56

11 8.1

6-1/46-3/4 6-1/4 159 2-1/4 57 20.7 16 200 300 400

45 67 90

20.7 15.3

7-3/48-1/2 8 203 2-1/2 64 50.0 37 300 400 500

67 90

112

50.0 36.9

910 9-1/2 241 2-13/16 71 82.7 61 300 400 500 600

67 90

112 135

83.0 61.2Baker Hughes INTEQ 16750-500-028 Rev. A / September 1994 Confidential

Table of ContentsJAR-KING I OverviewIntroductionPrinciples of DesignJAR-KING I Features

Tool DescriptionTorque Transmission SystemJarring SystemLocking SystemCalculation of Required PullFor Example:Calculation of Required Minimum Pull

Tool PlacementLower Part of the Bottom Hole Assembly (Under Comp...Upper Part of the Bottom Hole Assembly (Under Tens...OperationOperation of the Locking SystemRelocking the JarChanging the Adjusting Shells

Jarring UpBumping DownModerate BumpingHeavy Duty Bumping

Tool CheckingGeneral InstructionsChecking the Jarring System

Specifications