WE Report

Lessons Learned

Lesson Learned





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Report No.

220

Discipline/Origin

Drilling
No origin

Well

Kallåsen
35/12-6 S

Date created

2019/02/07
2494 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Planning
Negative

Transocean Arctic


What happened in Reservoir section:
Not enough weight on jar when drilling with 8 1/2″ rock bit in order to drill with jar in tension. 11 MT buoyant below jar, limit for PDC 12 MT, limit for rock bit 20 mt.

What Was Planned

Drill 8 1/2″ section

What Was Learned

Another 2 stands 6 1/2″ DC below jar would give additional 6.6 MT buoyant weight in 1.20 sg mud.

EDITOR


CLOSE LL (testing)





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