Milling 4 1/2in production upwards with Coil Tubing

To P&A a production well, is intended to Perf & Squeeze in the 4-½in tubing, to set a cement barrier plug inside and in the annulus outside the tubing (9-5/8in).

If setting the cement plug fails, the plan is to section mill the 4-½in tubing upwards to be able to set a mechanical barrier as an anchor for the cement plug in the 9-5/8in production casing (50 deg inclination).

Does anyone have any experience with this, from the point on milling tools, barries as anchor for the cement plug and procedures in general?


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Posted by

Soren Hartmann

Soren Hartmann

Operation Optimisation, No Cure–No Pay, Performance Optimisation and Knowledge Management Specialist | Drilling Training | Facilitator | Senior Drilling Supervisor & Project Manager


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