WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
2413 – Wellesley

Borgland Dolphin Drilling
Own Experience
Operational 36/1-4
Hemispheres
Surface section 04/01/2022
Ahead of a connection at 1146m (105m below the 13 3/8″ shoe), a blockage occurred in the cuttings . . .

Drilling Supervisor / Morten Laget


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Wellesley
2409 – Wellesley

Borgland Dolphin Drilling
Own Experience
Operational 36/1-4
Hemispheres
Top hole 01/01/2022 When making up 18 3/4″ WHH to No Cross joint it was very tight clearance for upper and lower jaws to . . .

Drilling Supervisor / Morten Laget


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Wellesley
2401 – Wellesley

Borgland Dolphin Drilling
Own Experience
Operational 36/1-4
Hemispheres
Production section 30/12/2021 ALL mud skips was put on the same boat, effectively removing any hope for recieving backload on said . . .

Drilling Engineer / Morten Laget


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Wellesley
2323 – Wellesley

Borgland Dolphin Drilling Operational 36/1-4
Hemispheres
Top hole 24/12/2021 Tool used successfully but Schlumberger should be told what our requirements are at the planning . . .

Drilling Supervisor / Morten Laget


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Wellesley
2324 – Wellesley

Borgland Dolphin Drilling
Own Experience
Operational 36/1-4
Hemispheres
Top hole 24/12/2021
30″ conductor and cement was cleaned out with seawater and sweeps, hole displaced to 1.40 SG . . .

Drilling Supervisor / Morten Laget


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Wellesley
2325 – Wellesley

Borgland Dolphin Drilling
Own Experience
Operational 36/1-4
Hemispheres
Top hole 24/12/2021
The deck-crew on days started to lay out slick joints in one bay before a crew change happened in . . .

Drilling Engineer / Morten Laget


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Wellesley
2321 – Wellesley

Borgland Dolphin Drilling
Own Experience
Operational 36/1-4
Hemispheres
Top hole 23/12/2021 o At 281m conductor couldn’t pass due to the tight spot observed when drilling there. Attempted to . . .

Drilling Engineer / Morten Laget


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Wellesley
1358 – Wellesley

Borgland Dolphin Drilling
Own Experience
INTERNAL
Planning 36/1-4
Hemispheres
Top hole 04/03/2021 Multiple requests for data raised during the creation of the model. The data requests were often . . .

Giacomo Bonomo / Morten Laget


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Wellesley
552 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
P&A 21/09/2020
Ran through BOP while jetting from top of BOP and landed out on top of wear bushing without hanging . . .

Drilling Supervisor


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Wellesley
553 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
P&A 21/09/2020
Re-dressed DQ MPT tool after retrieving 9 5/8″ wear bushing. RIH and jetted through BOP at high rate . . .

Drilling Supervisor


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Wellesley
554 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 21/09/2020
Not able to load barite due to long transfer lines when loading on starboard side.
Bentonite ended . . .

Drilling Supervisor


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Wellesley
555 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 21/09/2020 Took onboard 90 m3 ready mixed kill mud in Stolsfjorden

Drilling Supervisor


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Wellesley
519 – Wellesley

Borgland Dolphin Drilling Planning 6204/11-3
Schweinsteiger
P&A 17/09/2020 Evaluated if joining the Rig Chase Campaign would be beneficial compared to the original plan using . . .

Elisabeth Vik


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Wellesley
483 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Surface section 05/09/2020 Ran MPT tool dressed to pull extended wear bushing. Successfully engaged and sheared out but hung up . . .

Drilling Supervisor


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Wellesley
481 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 03/09/2020
Made up shoe track to maximum torque. On attempting to change torque values in JAM system to optimum . . .

Drilling Supervisor


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Wellesley
476 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 02/09/2020 Due to shallow gas zone at 331m, needed to fill casing with mud to be ready in case of need to wash . . .

Drilling Supervisor


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Wellesley
473 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 01/09/2020 To be able to use it for BHA-handling, a hole was made in the protector.

Drilling Engineer


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Wellesley
474 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 01/09/2020
Hit shallow gas at 331m, only 24m below 36″ conductor shoe. Killed with 1.50 SG kill mud. Drilled . . .

Drilling Supervisor


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Wellesley
475 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 01/09/2020
Hit shallow gas at 331m, only 24m below 36″ conductor shoe. Killed with 1.50 SG kill mud. Drilled . . .

Drilling Supervisor


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Wellesley
467 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 31/08/2020 More manual handling and time spent in addition to less efficient handling when not having all BHA . . .

Drilling Engineer


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