distribution shallow water development in india

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

GE2007 All Rights Reserved

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



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



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.



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



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



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.



13-5/8" Tree on Mudline

• Shallow Water Vertical Xmas Tree (SVXT)

• Shallow Water Horizontal Xmas Tree (SHXT)



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



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



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


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



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


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



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


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



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.



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.



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



MLC Conversion Steps (not to scale)

Mudline

Mudline

Existing Mudline Suspension

Wellhead/ ACS

Mudline

Tree



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



GE System Capabilities



Subsea Production System Broad portfolio - Turbo machinery thru Offshore, Drilling, Surface to Subsea…

Trees Manifolds Controls

Integrated Subsea Products

Connection Systems



Thank You



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