the subsea well access toolkit · expro subsea well access overview introduction 6 • expro is the...

The Subsea Well Access Toolkit

Donald Horsfall

Global Sales Manager – Expro

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Efficient Subsea Well Access and Intervention

Agenda

• Subsea Wells Market: Overview

• Subsea Well Access Overview: Introduction, Systems and Operations

• Subsea Test Tree Assembly (SSTTA): Introduction and System Overview

• Intervention Riser System (IRS): Introduction and System Overview

• Riserless Well Intervention System (RWIS): Introduction

• Expro/COOEC Offshore Alliance: Vessel Overview

• Riserless Well Intervention System (RWIS): System Overview

• Well Intervention: Overview

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Subsea Wells Market

Subsea Well Access Systems

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Global Subsea Wells

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Global Subsea Wells

Subsea Wells Online

Subsea Well Awards

Total current subsea well inventory

Overall intervention days per year per Region to end of 2018(1.5 days per well per year average)

Africa (including Egypt, Libya & Tun) 2646

Asia 411

Australasia 350

Europe 3330

Latin America 1983

Middle East & Caspian 117

North America 1402

Global Intervention Days 10,239

Total subsea well stock end 2018 circa 6826

Median age of well stock (11 years)

All subsea wells require to be monitored and maintained to the relevant standards until safely decommissioned

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Expro Subsea Well Access

Expro Subsea Well Access Overview

Introduction

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• Expro is the leading provider of Subsea Test Tree

Assemblies (SSTTA) with a current market share of over

60%

• Due to changing market dynamics Expro felt it essential

to provide customers with a broader subsea well access

service offering

• The optimal well access system is dependent on the

well intervention requirement through the lifecycle of the

well

• The strategy was formed to provide life of field subsea

well access systems

• Expro have developed our subsea well access product

portfolio with the inclusion of the Light Well Intervention

capability by adding both riser based (IRS) and riserless

(RWI) well intervention systems

Subsea Well Access Overview

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Landing String / SSTTA

• Market leading technology

• Deployed from client rig

• Full intervention capability

to manage all potential operational

requirements

• Requires full marine riser and BOP

• Extensive 30+ year track record

Intervention Riser System

• Deployed from client rig or vessel

with derrick

• Ability to deploy coil tubing and all

other intervention tools

• Increases efficiency as removes the

necessity to deploy marine riser and

BOP

Riserless Well Intervention System

• Wire through water well Intervention

enabling production enhancement

and well remediation

• Low cost, rapid deployment and

operation

Efficiency

Capability

System overview

Capability

Light Well InterventionRig BOP Safety System

Subsea Test Tree Assembly (SSTTA)


Introduction

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• SSTTA provides the primary means of well control during well

testing, completion, intervention and abandonment operations on-

board a MODU

• This option offers clients the capability to manage the risks

associated with various unknowns that can present themselves

during late life or decommissioning activity while ensuring well

integrity is maintained at all times

• Shuts in the well and provides a barrier between the reservoir and

the external environment using two “fail safe close” valves, while

safely retaining fluid above the RV and preventing hydrocarbon

migration to the riser

• Safely disconnects on demand from the well in compliance to the

legislative criteria with respect to ESD and EQD


System overview

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• Up to 7-3/8” system comprising of the SSTT, Latch, RV, LV’s and

STT

• High debris tolerant system (up to 15% solids)

• -18°C to 150°C rated

• Up to 15,000psi working pressure and >3,000m water depths

• Cutting Capabilities – SSTT can cut up to 2.375” x 0.204 WT

Coiled Tubing with wire/cable. Cut & seal wireline using spring

force only (i.e. Fail Safe Close). LV and RV can cut & seal wireline

• Can be used for batch subsea intervention campaigns and

additionally racked back in the vertical position

• Multiple levels of SSTT Unlatch methods

• Will interface with both horizontal and vertical xmas trees

• Over 30 years of experience and track record globally

• Designed / Manufactured / Qualified in accordance with ISO

13628-7 / API RP 17G

• Capable of frac, stimulation, intervention, coil tubing and flow

backs etc. to support maximum economic recovery of

hydrocarbons

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Intervention Riser System (IRS)


Introduction

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• Expro have entered the intervention riser system market,

providing the market with a rental IRS (LRP/EDP) to reduce

late life CAPEX and manage OPEX

• Expro are responsible for the service, controls, system

interfacing, project management and engineering

• First contract awarded: 360 days P&A scope for Pacific Drilling

supporting Petronas Chinguetti Field P&A offshore Mauritania


System overview

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• Compact lightweight modular system

• Rated to 10,000psi and 3,000m water depths

• 7 3/8” dual valve block with the ability to cut and

seal on 2-7/8” coil tubing and wireline

• Upper Cutting Valve (UCV) and Retainer Valve

(RTV) are fail safe closed

• Will interface with both horizontal and vertical

xmas trees

• 13-5/8” 10K hub end re-entry mandrel

• ROV intervention panels

• 2” bore annulus female receiver

• Interfaces with tree running tools and/or wellhead

connectors

• Over 15 years well intervention track record

globally

• Fitted with emergency shut down/disconnect

system

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Riserless Well Intervention System (RWIS)


Introduction

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• Riserless well intervention is a technique used to

safely, efficiently and cost effectively enter

subsea wells to perform well intervention tasks

• An intervention through water method allows the

work to be performed from lower cost and more

agile vessels negating the need for drilling rigs

• By using wireline and coil hose it is estimated

that more than 70% of all life of well intervention

requirements can be performed with a RWI

service

• Technology developments to increase well

intervention capabilities from a vessel with a RWI

system

Expro Group & COOEC Offshore

Alliance

• Expro Group and COOEC Offshore have joined forces through a co-operation agreement (alliance) to offer a comprehensive Riserless Well Intervention Service globally

• Expro Group’s Well Flow Management expertise and global footprint is complemented by COOEC Offshore’s marine assets and ROV capabilities

• A key client benefit is that the Expro / COOEC Subsea Alliance can provide in house experienced downhole services as well as the well access system, thus providing a true “integrated solution”


Vessel overview

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System overview

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• The Riserless Well Intervention System provides a safe and efficient method of gaining well access

• The system utilises qualified and field proven components and technology

• DP3 monohull 125.75m long x 25m beam. 250t 3000m AHC offshore crane

• The system is capable of covering operations in water depths ranging from 70m to 3000m

• The system comprises 3 main packages:

Well Access System (RWI Stack)

Subsea Service Module (SSM)

Topsides equipment

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Well Intervention

New technology

Tri-Combo Well Intervention

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• Multi service tri-combo well

intervention package

• Consisting of a coil hose unit with the

additional well intervention capability

to run wireline or slick e-line

• Allowing in-well pumping capability

(incl stimulation), heavy duty wireline

and real time bi-directional telemetry

intelligent Slickline

• Maximising well intervention

opportunities and efficiencies

Donald HorsfallGlobal Sales Manager, Subsea

[email protected]

the subsea well access toolkit · expro subsea well access overview introduction 6 • expro is the...

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