WE Report

Lessons Learned

Lesson Learned





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Report No.

293

Discipline/Origin

Drilling
No origin

Well

Brasse
31/7-3 A

Date created

2019/10/03
2256 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Operational
Negative

Transocean Arctic


What happened in Reservoir section:
Performed cut and thread operation to free stuck wireline cable and fish wireline toolstring 1A. Used Schlumberger overshot. Had problems runnings past PBR at 796 m (hole vertical). Worked string up and down several times and reduced cable tension to 2000 lbf before RIH. Running speed up to 6 stands per hour.

What Was Planned

Wireline cut and thread

What Was Learned

Using liner instead of casing can cause problems when non-standard operations are necessary due to operations problems.

What Actions Are Required

Evaluate in planning process.

EDITOR


CLOSE LL (testing)





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