WE Report

Lessons Learned

Lesson Learned





By: Drilling Engineer

Report No.

5856

Discipline/Origin

Drilling
Own Experience

Well

Norma
25/7-11 S

Date created

2023/07/30
860 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Planning
Negative

Deepsea Yantai


What happened in Top hole:
Used the ROV dredging around the conductor after drilling the 9 7/8″ Pilot hole. The cleaning with the ROV did not help substantially and difficult to read the bullseye covered in cuttings.

What Was Planned

To POOH without cleaning the WH on the way out after drilling pilot hole.

What Was Learned

To use the bit to wash and clean the WH free of cuttings. The bit have better cleaning capabilities than the ROV dredge. Difficult to read the bullseye when covered in cuttings.

What Actions Are Required

Include in the DOP for future Pilot hole operations to clean the WH free from cutting POOH.

EDITOR


CLOSE LL (testing)





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