WE Report

Lessons Learned

Lesson Learned





By: Drilling Engineer

Report No.

5133

Discipline/Origin

Drilling
No origin

Well

Carmen
35/10-10S

Date created

2023/04/10
971 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Operational
Negative

Deepsea Yantai


What happened in Surface section:
MWD/DD instructed drilling crew to break wrong connection when L/D 26″ BHA. As top part of assy was lifted above stick-up the catwalk securing the lifted Assy, was moved backwards, causing the inner-rod to be bent and damaged. Plan to use Back-up Assy for 17 1/2″ BHA and muster new Back-up assy from onshore.

What Was Planned

Break off and L/D 26″ BHA

What Was Learned

Important with clear communication from DD to Drill Crew to break correct connection.

EDITOR


CLOSE LL (testing)





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