WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
5114 – Wellesley

Deepsea Yantai Drilling Operational Eirik (OMV) Intermediate section 30/03/2023 Experienced higher pore pressure earlier than expected. Had enough to weight up active from 1,44 to . . .

Sander Schaathun / Morten Laget


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Wellesley
5115 – Wellesley

Deepsea Yantai Drilling Operational Eirik (OMV) Production section 30/03/2023 If we are leaning to one of the sides it is easy to hang up in something which can result in a . . .

Sander Schaathun / Morten Laget


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Wellesley
5116 – Wellesley

Deepsea Yantai Drilling Operational Eirik (OMV) Reservoir section 30/03/2023
Change of slips due to damage of pump in sub connection.
Due to the low ROP the pump in sub side . . .

Sander Schaathun / Morten Laget


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Wellesley
5112 – Wellesley

Deepsea Yantai Drilling Operational Eirik (OMV) Reservoir section 29/03/2023 Did not provide desired slug effect.

Sander Schaathun / Morten Laget


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PGNiG
4946 – PGNiG

Deepsea Yantai Drilling
Experience Transfer Meeting
Operational 6608/1-1 S
Copernicus
Production section 03/11/2022
The gas readings for the 12 ¼” was done very well, and the correlation was quite good between the . . .

Richard Mollison



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PGNiG
4951 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1
Copernicus
N/A 26/09/2022 The Electrician was called and he found a loose wire (norwegian: fase) inside one of the . . .

Steinar Aarnes



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PGNiG
4913 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
P&A 23/09/2022 When pulling the conductor there was no cement stuck to it due to use of protane wrapping on the . . .

Drilling Engineer / Morten Laget


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PGNiG
4911 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
Surface section 20/09/2022
10-15 ton OP while pulling out of open hole.
Bit and stabs balled up / clay

Drilling Engineer / Morten Laget


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PGNiG
4912 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
Production section 20/09/2022 Time was spend circulating hole clean and even MW in/out.

Drilling Engineer / Morten Laget


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PGNiG
4908 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
19/09/2022 Spent 3 hours to release RT after landed 18 3/4″ WH

Drilling Engineer / Morten Laget


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PGNiG
4909 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
Top hole 19/09/2022 The SMO level sensor did not function in auto operation. Was operated manually. Enhanced made a . . .

Drilling Engineer / Morten Laget


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PGNiG
4910 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
P&A 19/09/2022 After setting 8 1/2″ OH P&A Cement Plug the plan was to circulate clean at 100 m over TOC and . . .

Drilling Engineer / Morten Laget


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PGNiG
4907 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
17/09/2022 During bulking the boat was alongside and was covered in dust

Drilling Engineer / Morten Laget


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PGNiG
4905 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
P&A 16/09/2022 To balanced the cement plug by pumping more spacer behind the cement plug.

Drilling Engineer / Morten Laget


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PGNiG
4906 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
Top hole 16/09/2022 30″ conductor was run as a “pre spud” activity. Hung off in landing string and acme sub in trip . . .

Drilling Engineer / Morten Laget


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PGNiG
4903 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
Top hole 15/09/2022 Enhanced and ROV had to be on same channel as drillfloor when doing offline activity due to repeater . . .

Drilling Engineer / Morten Laget


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PGNiG
4904 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
Surface section 15/09/2022 The cement swivel was delivered with the wrong threads. Delivered with NC50, should been XT57.

Drilling Engineer / Morten Laget


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PGNiG
4949 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
Surface section 15/09/2022
After landing the 18 3/4″ LPWHH, the RT would not release from the WH. Several times they attempted . . .

Richard Mollison


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PGNiG
4950 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
Surface section 15/09/2022 The box end of the 13 3/8″ no cross coupling is too long to allow the use of the casing running tool . . .

Richard Mollison


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PGNiG
4901 – PGNiG

Deepsea Yantai Drilling Operational 6608/1-1 S
Copernicus
P&A 14/09/2022 The heating cabinet in the logging unit does not work as required, not able to change the . . .

Drilling Engineer / Morten Laget


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