WE Report

Lessons Learned

Lesson Learned





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Report No.

313

Discipline/Origin

Drilling
No origin

Well

Canela
6507/7-16 S

Date created

2019/01/07
2525 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Bit
Negative

Island Innovator


What happened in Intermediate section:
The 17 1/2″ bit was damaged, when 45 mt WOB was experienced while drilling with large rig heave. This resulted in the bit being ringed out which again resulted in very low ROP and in high overpull POOH. A decision was made to backream out of hole as swelling formation was expected to be cause of overpull. With the bit on surface it was decided not to perform any wiper trip.

What Was Planned

Drill 17 1/2″ hole to section TD and POOH.

What Was Learned

Ensure rig heave is monitored during drilling to ensure bit is not damaged. Correct decision made to not do wiper trip before running csg. Overpull likely caused from ringed out bit and drilling on stabilizers.

What Actions Are Required

Ensure rig heave is monitored during drilling to ensure bit is not damaged.

EDITOR


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