WE Report

Lessons Learned

Lesson Learned





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Report No.

290

Discipline/Origin

Drilling
No origin

Well

Brasse
31/7-3 S

Date created

2019/10/02
2257 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Operational
Negative

Transocean Arctic


What happened in Intermediate section:
Pumped 3 x 20 m3 pills at section TD vs 2 x 20 m3 pills programmed. Not sure if made a difference, but quick and cheap to implement. The clays between Utsira and seabed were problematic – wiped through until eventually circulated clean and backreamed through conductor to clean up the hole.

What Was Planned

POOH Utsira Fm.

What Was Learned

Consider in future POOH to put the bit above the top Utsira then circulating hole clean to seabed with mud before attempting to POOH to seabed.

What Actions Are Required

For well drilling through Utsira, consider learnings in planning phase.

EDITOR


CLOSE LL (testing)





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