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Alternative testing methodfor wireline tools

By Henning Hansenhenning.hansen@aai.no

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The need for demonstrating new technologies prior to taking this into use in “real” wellbores

• Trying out new wireline technologies in live deep wellbores, not at least offshore, can be a very costly task

• There is always a risk of damaging the wellbore, tool malfunction, tool getting stuck (stopping oil production), etc.

• Due to these factors, we often experience a strong reluctance of implementing new “untried” technologies

• “Come back when you have demonstrated success in someone else’s wellbore”

• Therefore, we propose an alternative method that should lower the fear of introducing new technologies

• Use deep water to provide distance (from operator to tool) andhydrostatic pressure

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We have deep oceans, lakes and fjords all over the world

• There are typically deep water available in close proximity to us

• In many cases way deeper than any test wells available

• Smaller vessels, like for example fishing or supply vessels, are low cost to hire

• Use this infrastructure to improve testing prior to deploying new technologies into your client’s wellbore

Note: The method herein described is not patented, and I have no intention of doing so. It is for the common benefit for suppliers and operating companies to lower the barriers for introducing new technologies into the oilfield. I believe the method described will help us all.However, if you want us to help you plan and execute testing according to these ideas, we will gladly do that.

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Alternative testing method, where deep water is used instead of costly wellbores

1. Perform repeated testing in workshop

- Tool is not out of view for operator

- Tool is close to surface control system

- Tool is not “at depth”

+ Tool functions can be closely observed

+ Problems can quickly be corrected

+ Low cost

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Alternative testing method, where deep water is used instead of costly wellbores

2. Perform testing in land test well

- Access to test well

- Well may not be deep enough

- Tool may be stuck downhole, resulting in significant costs of retrieving tool

+ Tool is downhole

+ Problems can relatively quickly be corrected

+ Medium cost

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Alternative testing method, where deep water is used instead of costly wellbores

3. Perform testing in clients offshore well

- High risk

- Tool may be stuck downhole, resulting in significant costs of retrieving tool, including possibility of loosing well

- Tool may malfunction, resulting in high cost (for nothing)

+ Tool is downhole, at required depth

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Alternative testing method, where deep water is used instead of costly wellbores

4. Perform testing in deep water, using low cost vessel

- May not achieve similar depth as client wellbore

+ Tool is at significant depth

+ Tool is out of operators view

+ Relatively low cost

+ No risk of damaging or loosing client well

+ Visual observation of tool operations possible

Note: The method herein described is based on doing the testing at minimum cost, and therefore I have not included any ROV for the testing. Simply because it is fully possible to do it without such a unit.

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Deployment of a wellbore tubing string, set on the seafloor

Not to scale (Of course!)

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Release to surface wire to guide WL tool into test tubing

Slack off deployment wire, and let ocean currents move this away.Release float and bring wire to surface.

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Release to surface wire to pull WL tool into test tubing

Release 2nd float and bring wire to surface. Bring 1st wire into vessel, and pull tension on this.

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Attach and deploy WL tool into the water

Connect WL tool to deployment wire. Pull this into the water by pulling on wire exiting lower end of test tubing.

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Deploy WL tool into test tubing, and perform testing

Pull WL tool into tubing, and perform required testing.Use external video cameras to observe any tubing protruding operations.

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Thank you for your attention

Henning Hansenhenning.hansen@aai.no+1 281 882 3941+47 9024 0910

Aarbakke Innovation – High impact innovations