WE Report

Lessons Learned

Lesson Learned





By: Drilling Supervisor

Report No.

2098

Discipline/Origin

Drilling
Own Experience

Well

Gomez
2/5-15

Date created

2021/08/27
1562 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Operational
Negative

Borgland Dolphin


What happened in Surface section:
Unable to set seal assembly after 13 3/8″ hanger was landed. Attempted several times to pressure up seal assembly. No go. POOH with CHART and inspected seal assembly. Found seal assembly with lock ring intact, but packed with cuttings on the inside. Performed mill and flush run, prior to setting seal assembly without lock ring on separate run.

What Was Planned

Run 13 3/8″ casing hanger on 13 3/82 casing with pre installed seal assembly.

What Was Learned

On the trip out prior to running casing it was back reamed from approximately 850 m to 20″ casing shoe at 590 m. Hole circulated clean in the shoe, prior to a wiper trip to TD. The hole was circulated clean and the trip out was performed without any significant drag.

What Actions Are Required

No clear conclusion why the seal assembly was packed with cuttings. All indication that hole was circulated clean both after back reaming and wiper trip.

EDITOR


CLOSE LL (testing)





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