WE Report

Lessons Learned

Lessons Learned865


Operator Rig Discipline / Origin Project Phase Well Section Date What Happened

DNO
8480 – DNO

Deepsea Yantai Drilling Operational 35/10-13
Kjøttkake
Intermediate section 24/03/2025 Commander 1000 is a very heavy CMT-head. Due to its weight, it is not preferable to use on DSY . . .

Sander Schaathun / Stig Seland


PDF


Edit


DNO
8483 – DNO

Deepsea Yantai HSEQ Operational 35/10-13
Kjøttkake
P&A 24/03/2025 When cementer was dropping/pushing CST into DP filled with OBM “splashed” out of pipe and spilled on . . .

Sander Schaathun / Stig Seland


PDF


Edit


DNO
8381 – DNO

Deepsea Yantai Drilling Operational 35/10-13
Kjøttkake
P&A 04/03/2025 When cutting the 9 5/8” casing with low flow / pressure, the parameters spiked / fluctiated. When . . .

Sander Schaathun / Stig Seland


PDF


Edit


DNO
8383 – DNO

Deepsea Yantai Drilling Operational 35/10-13
Kjøttkake
P&A 04/03/2025 The swedge that arrived the rig had a XO. When setting a Kelly cock on the swedge the total length . . .

Sander Schaathun / Stig Seland


PDF


Edit


DNO
8327 – DNO

Deepsea Yantai Drilling Operational 35/10-13
Kjøttkake
Surface section 20/02/2025 Wrong lineup of hydraulic hoses from shore.

Stein-Petter Slatlem


PDF


Edit


DNO
8323 – DNO

Deepsea Yantai Drilling Operational 35/10-13
Kjøttkake
Reservoir section 19/02/2025 1” flowmeter hose burst causing spillage of OBM in the cement unit, while bleeding off during the . . .

Sander Schaathun / Stig Seland


PDF


Edit


DNO
8324 – DNO

Deepsea Yantai Drilling Operational 35/10-13
Kjøttkake
Reservoir section 19/02/2025 MWD spent nightshift to program and confirm BHA. In the morning hours, it turns out that the plan . . .

Sander Schaathun / Stig Seland


PDF


Edit


PGNiG
8275 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Run Riser and BOP 15/02/2025 Variable readings on bullseye.

Drilling Engineer


PDF


Edit


PGNiG
8276 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Intermediate section 15/02/2025 Stabilizer to close to pin end – not able to make up with hydra tong. Had to use rig tongs.

Drilling Engineer


PDF


Edit


PGNiG
8282 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Production section 15/02/2025 Use an updated CRTi tool with active set function.

Drilling Engineer


PDF


Edit


PGNiG
8283 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Reservoir section 15/02/2025 The BU float subs sent out for the operation had wrong/undesired OD. The BU float subs sent out was . . .

Drilling Engineer


PDF


Edit


PGNiG
8284 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Reservoir section 15/02/2025 No stethoscope run in the 8 ½” section.

Drilling Engineer


PDF


Edit


PGNiG
8285 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Surface section 15/02/2025 Set HAL suspension plug as pr HAL manual, plug depth +- 593 m. Pressure tested plug to 290 bar/10 . . .

Drilling Engineer


PDF


Edit


PGNiG
8287 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Reservoir section 15/02/2025 The overshot initially was not sent out with the Ardyne fishing basket. The overshot was planned out . . .

Drilling Engineer


PDF


Edit


PGNiG
8290 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
P&A 15/02/2025 Primary cutter was tempest backup cutter was conventional with marine swivel. Lack of annular swivel . . .

Drilling Engineer


PDF


Edit


DNO
8263 – DNO

Deepsea Yantai Drilling Operational 35/10-13
Kjøttkake
Run BOP 14/02/2025 BOP had to be pulled just before landing due to grouting job necessary for conductor. Not able to . . .

Drilling Engineer


PDF


Edit


DNO
8264 – DNO

Deepsea Yantai Drilling Operational 35/10-13
Kjøttkake
Reservoir section 14/02/2025 MWD spent nightshift to program and confirm BHA. In the morning hours, it turns out that the plan . . .

Drilling Engineer


PDF


Edit


PGNiG
8266 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Surface section 14/02/2025 Had to run SMO on pipe due to too much heave.

Drilling Engineer


PDF


Edit


PGNiG
8205 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Top hole 03/02/2025 Protan AM sleeve came sliding down after making up connection on 36” WHH. Joint and conductor string . . .

Drilling Engineer


PDF


Edit


PGNiG
8206 – PGNiG

Deepsea Yantai Drilling Operational 6501/10-1
Tomcat
Top hole 03/02/2025 Fiberglass inner string broke off due to strong currents.

Drilling Engineer


PDF


Edit


New Lesson Learned

You do not have permission to view this form.




\n\t\t

\n\t\t\t\n\t\t\t