WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
6391 – Wellesley

COSLPromoter Drilling
Own Experience
Planning 35/10-12AS
Gnomoria
Surface section 12/06/2024 Not possible to M/U the no-cross joint, because it was not possible to grip with the casing tong on . . .

Giacomo Bonomo / Morten Laget



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Wellesley
5840 – Wellesley

Deepsea Yantai Drilling Planning 35/10-10S
Carmen
Intermediate section 20/06/2023 It was run according to tally.

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
5842 – Wellesley

Deepsea Yantai Drilling Planning 35/10-10S
Carmen
Intermediate section 20/06/2023 Had some stringer in the bottom of the 12 1/4″ Section and had to work the csg hgr w/seal assy up . . .

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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Wellesley
5835 – Wellesley

Deepsea Yantai Drilling
Own Experience
Planning 35/10-10S
Carmen
Surface section 16/06/2023 Crossovers supplied were of very different lengths: 4m, 6m and 12m.

Drilling Engineer / Morten Laget


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Wellesley
5836 – Wellesley

Deepsea Yantai Drilling
Own Experience
Planning 35/10-10S
Carmen
Top hole 16/06/2023 The casing string run was a mixed string of VAM TOP and VAM 21 with VAP TOP run first. This meant . . .

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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Wellesley
5162 – Wellesley

Deepsea Yantai Drilling Planning 35/10-10S
Carmen
Reservoir section 29/04/2023 Found some deviation in the DOP’s from the HPHT manual.

Drilling Engineer / Morten Laget


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Wellesley
5163 – Wellesley

Deepsea Yantai Drilling Planning 35/10-10S
Carmen
29/04/2023 There is to much information in the DOP’s. Easy to miss out on important steps because they are . . .

Drilling Engineer / Morten Laget


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Wellesley
5135 – Wellesley

Deepsea Yantai Drilling Planning 35/10-10S
Carmen
Surface section 10/04/2023 Difficult to install

Drilling Engineer / Morten Laget


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Wellesley
5136 – Wellesley

Deepsea Yantai Drilling Planning 35/10-10S
Carmen
Surface section 10/04/2023 Overpull experienced trying to pull the WHRT clear of the Housing after release.

Drilling Engineer / Morten Laget


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Wellesley
5137 – Wellesley

Deepsea Yantai Drilling Planning 35/10-10S
Carmen
Surface section 10/04/2023

Drilling Engineer / Morten Laget


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Wellesley
4487 – Wellesley

Borgland Dolphin Logistics
Own Experience
Planning 36/1-4
Hemispheres
Other 15/01/2022 Another operator with the same rig chooses other vessels for a short well. Rig IDC, PSV’s not IDC . . .

Johan Kjos-Hanssen / 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
1139 – Wellesley

Transocean Arctic Marine
PSA Q&A
Planning 25/1-13
Balcom
N/A 10/02/2021

AFC side 32 i søknaden står det «Earliest handover date for the rig is 22nd January 2018.». På side . . .

Karina Helle / Morten Laget



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Wellesley
1141 – Wellesley

Transocean Arctic Marine
PSA Q&A
Planning 25/1-13
Balcom
N/A 10/02/2021

Vi ber også om en beskrivelse av hvilke kommunikasjonsløsninger som blir brukt til å kommunisere . . .

Karina Helle / Morten Laget



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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
462 – Wellesley

Borgland Dolphin Drilling Planning 6204/11-3
Schweinsteiger
26/08/2020 To low budget time on rig move

Morten Laget


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Wellesley
1317 – Wellesley

Borgland Dolphin Planning 6204/11-3
Schweinsteiger
20/08/2020 Mobilisering av PAX til Green yard


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