WE Report

Lessons Learned

Lessons Learned865


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

DNO
5860 – DNO

Deepsea Yantai Drilling
Own Experience
Planning 25/7-11 S
Norma
Top hole 30/07/2023 One of the stop collars fell of when it was picked up from the boat. When laying down the . . .

Drilling Engineer / Morten Laget


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DNO
5861 – DNO

Deepsea Yantai Drilling
Own Experience
Operational 25/7-11 S
Norma
Top hole 30/07/2023 Difficult to see cement in return due to poor visibility at seabed. pH sniffer indicated cement in . . .

Drilling Engineer / Morten Laget


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DNO
5862 – DNO

Deepsea Yantai Drilling
Own Experience
Operational 25/7-11 S
Norma
Top hole 30/07/2023 When displacing the 26″ hole at TD a large volume of WBM was needed. And due to VDL the mud column . . .

Drilling Engineer / Morten Laget


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DNO
5863 – DNO

Deepsea Yantai Drilling
Own Experience
Operational 25/7-11 S
Norma
Top hole 30/07/2023 Everything went according to plan, no hole problems. Not much mud left.

Drilling Engineer / Morten Laget


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DNO
5865 – DNO

Deepsea Yantai Drilling
Own Experience
Operational 25/7-11 S
Norma
Surface section 30/07/2023 Problems in start of 17 1/2″ Section with plug in blower system to ISO tanks. Few skips in field.

Drilling Engineer / Morten Laget


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DNO
5866 – DNO

Deepsea Yantai Drilling
Own Experience
Planning 25/7-11 S
Norma
Surface section 30/07/2023 Difficulties with logistics to separate the joints below 11.5 m and the joints longer due to limited . . .

Drilling Engineer / Morten Laget


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DNO
5868 – DNO

Deepsea Yantai Drilling
Own Experience
Operational 25/7-11 S
Norma
Surface section 30/07/2023
The drill commenced with the Driller pressuring up the well with 30 bar.
The classic method of . . .

Drilling Engineer / Morten Laget


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DNO
5869 – DNO

Deepsea Yantai Drilling
Own Experience
Operational 25/7-11 S
Norma
Surface section 30/07/2023 From the start of the section after the FIT, delivery of cuttings to the ISO tanks using the CCBs . . .

Drilling Engineer / Morten Laget


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Wellesley
5845 – Wellesley

Deepsea Yantai Drilling
Own Experience
Operational 35/10-10S
Carmen
P&A 12/07/2023 Pulled casing hanger with upper annular closed and C&K lines closed.

Drilling Engineer / Morten Laget


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Wellesley
5844 – Wellesley

Deepsea Yantai Drilling Operational 35/10-10 A
Carmen
Production section 10/07/2023 Needed several trips with the tool up in the casing to cool it down.

Drilling Engineer / Morten Laget


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Wellesley
5839 – Wellesley

Deepsea Yantai Drilling Operational 35/10-10S
Carmen
Intermediate section 20/06/2023 The cement didn’t set up as expected.

Drilling Engineer / Morten Laget


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Wellesley
5841 – Wellesley

Deepsea Yantai Drilling Planning 35/10-10S
Carmen
Intermediate section 20/06/2023 The CHSART was run with the pup sent out with the tool.

Drilling Engineer / Morten Laget


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Wellesley
5843 – Wellesley

Deepsea Yantai Drilling Planning 35/10-10S
Carmen
Intermediate section 20/06/2023 It was separated into two runs. The cup tester did not fit in the 9 7/8″ wearbushing installed in . . .

Drilling Engineer / Morten Laget


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PGNiG
5838 – PGNiG

Deepsea Yantai External Environment Planning 6501/10-1
Tomcat
Environmental Seabed inspection 19/06/2023 During preparation of SoW, Marine department needed input from Engineering Company (InterMoor) to . . .

Stian Engvik / Morten Laget



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PGNiG
5834 – PGNiG

Deepsea Yantai Drilling
Own Experience
Planning 6305/10-1
Tomcat
N/A 15/06/2023
BO&K Analysis performed in Aug 2022, with a sensitivity on revised reservoir data.

The . . .

Richard Mollison / Morten Laget



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Wellesley
5186 – Wellesley

Deepsea Yantai Drilling
Own Experience
Operational 35/10-10S
Carmen
Reservoir section 20/05/2023
Drilled 8 1/2″ section with 5 7/8″ DP with 1400-1500 lpm and low ROP, saw ECD up to 18 points.
MW . . .

Drilling Engineer / Morten Laget


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Wellesley
5184 – Wellesley

Deepsea Yantai Drilling
Own Experience
Operational 35/10-10S
Carmen
Reservoir section 18/05/2023 Managed to fish roughly 1/2 of junk in hole that accumulated in junk basket (some was seen over . . .

Drilling Engineer / Morten Laget


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Wellesley
5185 – Wellesley

Deepsea Yantai Drilling
Own Experience
Operational 35/10-10S
Carmen
Reservoir section 18/05/2023 On second MDT got stuck with Saturn packer and had to release electrical cable head and fish . . .

Drilling Engineer / Morten Laget


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Wellesley
5173 – Wellesley

Deepsea Yantai Drilling Operational 35/10-10S
Carmen
Reservoir section 08/05/2023 Crew not participating in the pre-job meeting but involved in L/D core.

Drilling Engineer / Morten Laget


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Wellesley
5172 – Wellesley

Deepsea Yantai Planning 35/10-10S
Carmen
Reservoir section 07/05/2023 Sent out a side door overshot from Archer last minute, but they did not have the grapples compatible . . .

Drilling Engineer / Morten Laget


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