WE Report

Lessons Learned

Lesson Learned





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Report No.

278

Discipline/Origin

Drilling
No origin

Well

Rungne
30/6-30

Date created

2019/01/01
2531 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Operational
Negative

Transocean Arctic


What happened in Reservoir section:
During POOH with coring assembly #3, took 70 mt overpull at 3250 m. After pulling further 9 m, got a new overpull of 30 mt. This corresponded to the distance between core barrel stabs on the core assembly and that the core assembly was pulled through the 9 5/8″ casing shoe. Continued pulling out of hole with 10 rpm, did not see further pull tendencies.

What Was Planned

Coring

What Was Learned

NA

What Actions Are Required

Plan to rotate (10 rpm) coring assembly through 9 5/8″ shoe area to avoid overpull/shook treatment of cores.

EDITOR


CLOSE LL (testing)





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