Second Subsea India 2012 roven Global Technical Best Practices on Subsea Tre Solutions for Challenging Indian Shallow Waters Frank Rooney (Nov 2012) 1 GE Confidential and Proprietary Information GE2007 All Rights Reserved
Oct 30, 2014
Second Subsea India 2012 Proven Global Technical Best Practices on Subsea Tree
Solutions for Challenging Indian Shallow Waters
Frank Rooney (Nov 2012)
1 GE Confidential and Proprietary Information
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Agenda
1. Subsea Development on Jackup Rig
2. SG-1 Wellhead System
3. Guide Base /Protection Structure
4. Tree On Mudline a. SVXT b. SHXT
5. Mudline Conversion
6. GE System Capabilities
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Subsea Development On Jack-Up Rig (Why a Jack-Up Rig) - Rigzone Nov 2012 Avg Rates
Jack-Up Semi-Sub$79,000/day $294,000/day
4.3M Rupee/day 16.1M Rupee/day
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Subsea Development On Jackup Rig Criteria for Running Tree on Mudline from JUDR
• Vertical or Horizontal Tree System Types (SVXT & SHXT).
• 13-5/8" SG-1 Wellhead (Same wellhead does both tree types).
• Shallow Water System’s (Approx 100m Water Depth).
• Installed using a Jack-up Drilling Rig (13-5/8" Surface BOP) .
• Operating pressure of 5000 psi standard (Up to 6500 psi SVXT).
• Lightweight tree’s typically 16 Tonnes SVXT or 28 Tonnes SHXT.
• SG-1 Wellhead - Protection Structure 65 Tonnes snag load transferred to the 30" conductor.
• Compatible with SG-1 Production Guidebase.
• Convert mudline suspension wells (no tree mods).
• System CAPEX and installation significantly reduced over Deepwater 18-3/4" Tree Systems.
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SG-1 Wellhead System
Field Proven Solutions - 103 off Tree on Mudline in 15 years
PGB TRT
Tree
5
SG-1 Wellhead System
CH-4 MANDREL POST ON STRUCTURE OR GUIDEBASE
LOCKING DOG
INDEXING SCREWS 36-PLC’S
30” RL-4 (LH)
65 TONNE SNAG LOAD WPS
ANTI-ROTATION KEYS (4 or 8 OFF)
PROTECTION STRUCTURE GUIDE FUNNEL
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Guidebase & Protection Structures
7
Production Guide Base (SG-1) Provides guidance for 13-5/8" sized
SVXT or SHXT Tree’s.
Additional Features: • Remote Flowline Mandrels
Production & Ann/Gas Lift. • ROV Isolation Valves Production &
Ann/Gas Lift.
• API 8-5/8" Dia Guide Posts on 6ft spacing c/w GL-4 post top latches.
• PGB Latch Mechanism +/-5 Degrees • Run on Standard FB Tool • ROV Removeable posts
Isolation Valves
Diver Make Up Flanges
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North Sea - Protection Structure (WPS) Protect Your Investment
90m Beam Trawler
Large trawler vessels operating in the North Sea dictates the need for robust wellhead protection structures.
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13-5/8" Tree on Mudline
• Shallow Water Vertical Xmas Tree (SVXT)
• Shallow Water Horizontal Xmas Tree (SHXT)
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GE Oil & Gas - Xmas Tree Systems
GE Oil & Gas offer a range of standard tree’s covering all pressures, temperatures and water depths.
Deep Water (‘D’ Series) DVXT/DHXT
Medium Water (‘M’ Series) MHXT/MVXT
Shallow Water (‘S’ Series) SVXT/SHXT
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Tree on Mudline Configurations
12 mation served
Tree on Mudline-Standard Specification • 13-5/8" CH-4 connector Down X 13-5/8" SG-1 Wellhead Profile up.
• Tree Bores 5" Production & 2" Annulus.
• Utilises standard VG-OP actuator and VG-300 valve sealing technolo
• Can be configured with choke and / or Subsea Control Module (SCM). ‘Dumb’ or ‘Smart’.
• Operating pressure of 5000 psi standard (Up to 6500 psi SVXT).
• Standard Trim HH-Production bore/EE Annulus bore.
• API 6A Specification - PSL3 Gas Tested.
• Temperature Range of -29°C to +121°C, -46 deg C downsteam of choke.
• DHPT capability on both tree types.
• Up to 3 off Chemical Injection Points.
• Production & Annulus Pressure/Temperature Transducers
• 2 x Downhole functions (SVXT)
• 6 x Downhole functions (SHXT)
Vertical SVXT
16 Tonnes
Horizontal SHXT
28 Tonnes
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SVXT Technology
(Shallow Water Vertical Xmas Tree)
1
Strong Currents + Restricted Visibility
Visibility
1m to 0.15m has been recorded
Retrieval of wellhead protector using drill pipe adapter after multiple failure of ROV to complete operation
Aim - Diverless Installation SVXT Tree 15 GE Confidential and Proprietary Information
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S-Series Shallow Water System Objectives
Objectives Subsea
Reduce CAPEX outlay Tree system including controls. -Challenge convention to reduce cost (standardisation).
Reduce Installation cost.
-Minimise weather dependant operations.
-Move control of operations to surface / through riser, where feasible.
-Removal diver operations completely during installation.
-Removal of ROV operations completely during installation.
Understand ROV / Diver capabilities.
-Visibility.
-Current.
-Tides.
Utilise disposable subsea camera technologies.
Camera Observing Tree Lock
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Improvements To Previous CTOM.
Reduction in Tree Height and weight.
17’
13.5’
Original Design SVXTHeight: 17’ Height: 13.5’Foot Print:23’ x 23’ Foot Print:19’ x 19’Weight: 47 Tonnes Weight: 38 Tonnes
20% Weight Reduction 17GE Confidential and Proprietary Information
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SVXT Tree Functionality
Chemical Injection via Vent for Crown Plugs.
Hydraulic Pilot Operated Valves (TCU&TCL)
2 x Chemical Injection Valves, with a 3rd available as an option.
2 x Production PTT ports, For Dual Redundancy.
SCM 1
Tree Run. Tool W/Integral Shear Valve •Inclusion of shear valve provides coil and wire shear capability.
•Provides secondary well control barrier.
•TRT allows remote make-up and disconnect of hydraulic junction plates.
Tree Running Tool
Stab Plate Remote Make-Up
Solution - Diverless Installation SVXT Tree
Shear Valve
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Guideline Utility Tool
Corrosion Cap
Bridging Stab Plate
•Remote installation of corrosion cap & production controls bridging plate.
Diverless Installation 20 GE Confidential and Proprietary Information
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SHXT Technology
(Shallow Water Horizontal Xmas Tree)
2
Tree Assembly (SHXT) Key Features:
5" x 2" 5,000 psi rated components
Tree Cap + 13-5/8" OD wellhead hub profile upper connection
Interfaces with the casing hanger in the wellhead via the isolation/orientation sleeve attached to the
Treehead.
Locked on with a CH-4 hydraulic non-integral connector providing structural and pressure containing connection to the subsea wellhead
5" Production Choke with ROV retrievable choke insert. 2" Gas Lift Choke with ROV retrievable choke insert. 5" and 2" Flowline Connectors.
Crown Plugs Barriers
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13-5/8" Tubing Hanger (SHXT) Key Features:-
•Concentric main through bore with a side outlet, which,
•in the installed position, is aligned with the horizontal main
• bore of the Treehead.
•HT-SG seals mounted on the circumference of the hanger
•above and below the outlet form the primary production seals.
•The HT-SG seal is an elastomeric energised metal-to-metal seal.
•The tubing hanger is oriented by a male key on the hanger
•bearing against a helix and close tolerance vertical slot in the
• Isolation/Orientation sleeve.
•The tubing hanger bore has a wireline plug profile above
• the production outlet.
•Internal seal and locking profile for crown plug.
•Up to 6 off hydraulic downhole functions & 1 DHPT.
• 5-1/2" 17/20lb/Ft Box Thread.
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Crown Plugs (Used in both SVXT/SHXT)
• Recovered using standard wireline fishing tool.
• Locking dogs retain crown plug in MVB or TH.
• Bi-directional chevron packing set provides the secondary seal.
• Uni-directional U seal is the primary metal to metal (MTM) plug seal.
• Lower target ring is a sacrificial component that protects the main plug components from erosion by well bore fluids.
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MUDLINE CONVERSION SYSTEMS (MLC-HANGERS & DIFFERENT CONNECTIONS)
• RL-4 Connector Up
• Cut Pipe Up
• DMR Box Up
• 18-3/4" MS700 to 13-5/8" SG-1
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MLC Conversion Steps (not to scale)
Mudline
Mudline
Existing Mudline Suspension
Wellhead/ ACS
Mudline
Tree
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18-3/4" MS700 x 13-5/8" SG-1 Conversion
13-5/8" SG-1 Mandrel
18-3/4" Connector to suit MS700 Wellhead
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GE System Capabilities
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Subsea Production System Broad portfolio - Turbo machinery thru Offshore, Drilling, Surface to Subsea…
Trees Manifolds Controls
Integrated Subsea Products
Connection Systems
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Thank You
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