The next gas lift well integrity & reliability leap forwards: - - PowerPoint PPT Presentation

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The next gas lift well integrity & reliability leap forwards: Barrier SPM's with retrievable check valves

www.ptc.as

Introduction

• Established reputation for developing

equipment in response to client demands

• Integrity
• Reliability
• Productivity
• Entered the Gas Lift Market in 2004 and

delivered the worlds first

• Well Barrier Accredited Gas Lift

Valves

• Unique check valve and bellows

design

• 10k pressure rating facilitating

deeper lift

• Now responding to client demands for

enhanced SPM’s

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Well Barrier SPM’s

• 3 Messages
• The challenge the market asked us to address
• How we have addressed the challenge
• The benefits

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The challenges to be addressed

• GLV is part of primary containment barrier
• But if the GLV is removed
• Casing / wellhead become the primary barrier
• And the secondary barrier ……….
• Maybe we should be setting a deep plug?
• Market demanded SPM’s w permanent check valves
• To maintain well integrity during GLV changeout
• At least one exists of course
• But the market likes to see competition
• And continuous improvement
• Second (Independent device) check valve in SPM
• Also enhances well reliability during gas lift ops

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The challenges to be addressed

• Well Reliability:
• The SPM check valve solution in the market to date
• Tubing retrievable
• In the event it were to fail
• Expensive to replace
• So the market demanded
• A wireline retrievable SPM check valve solution

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Well Barrier SPM’s

• Just 3 Messages
• The challenge the market asked us to address
• How we have addressed the challenge
• The benefits

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How we addressed the challenge

• A few years ago ………..
• A client came to us with another challenge
• Somehow they had installed a SPM facing downwards
• Easy done SPM’s usually box/box
• We developed an upside down pulling tool
• To facilitate change out

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How we addressed the challenge

Patent Pending Upwards facing latch retrievable GLV or IPO Downwards facing latch retrievable GLV check valve module

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How we addressed the challenge

• Changing Primary GLV
• As per normal operation
• But lower GLV check valve

stays in place

• So primary well containment

envelope remains intact

• No U tubing

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How we addressed the challenge

• Replacing the “permanent” GLV
• Utilises upside down kick over tool
• Primary well barrier is temporarily

lost unless a deep set plug is installed

• But frequency of operation much less

than with conventional solution

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Well Barrier SPM’s

• Just 3 Messages
• The challenge the market asked us to address
• How we have addressed the challenge
• The benefits

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The benefits

• Enhanced well integrity
• Primary barrier not compromised during routine

GLV change outs

• Enhanced well reliability
• 2 High reliability (independent) check valves
• Reduced lifecycle costs
• If “permanent” check valve fails
• it can be replaced using wireline

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The costs

• Can’t talk about benefits without also considering the costs
• Not going to share the actual costs in this public forum:
• But lets play with some numbers, what if
• The incremental cost to install PTC barrier SPM’s is £150k/well
• Oil price was $100 / bbl ( £62 )
• The average gas lifted well produced 1000 stb oil/day
• How many days of accelerated production over the life of the well

would be required to payback the investment

• 2.5 days
• Over the life of your well, could enhanced reliability / simplified

well ops deliver that ?

• On that basis you could argue the enhanced integrity is for free!!

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Thanks for listening

• Happy to take any questions

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