WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
6456 – Wellesley

COSLPromoter Drilling
Own Experience
Operational 35/10-12 S
Gnomoria
P&A 05/07/2024 Discussion about the risk of accidentally pulling the seal assembly free (no outer lock ring . . .

Drilling Engineer / Morten Laget



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Wellesley Petroleum
6454 – Wellesley Petroleum

COSLPromoter, COSL Promoter External Environment
Own Experience
Operational 35/11-5, 39/11-29S
Toppand East
Other 02/07/2024
Recieved phonecall from SAR Florø which have not been informed about Toppand East well. The waste . . .

Helene Folkvord


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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
6384 – Wellesley

COSLPromoter Drilling
Own Experience
Operational 35/10-4 A
Gnomoria
Top hole 11/06/2024 RMR external adapter in place. Not possible to easily access profile and install VX gasket without . . .

Giacomo Bonomo / Morten Laget



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Wellesley
6368 – Wellesley

COSLPromoter, COSL Promoter Drilling
Own Experience
Operational 35/11-5, 39/11-29S
Toppand East
Reservoir section 06/06/2024 The BOP test tool could not be used, because one of the TJ was in conflict with the LPR. The TJ . . .

Giacomo Bonomo / Morten Laget



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Wellesley
6369 – Wellesley

COSLPromoter, COSL Promoter Drilling
Own Experience
Operational 35/11-5, 39/11-29S
Toppand East
Surface section 06/06/2024 Not possible to reach the profile depth with the ROV jetting tool, as the RMR external adapter top . . .

Giacomo Bonomo / Morten Laget



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Wellesley
6254 – Wellesley

COSLPromoter, COSL Promoter Drilling Operational 35/11-5, 39/11-29S
Toppand East
Reservoir section 30/05/2024 Needed to change the BX inserts. Resulting in 30 min rig time and unnecessary manual handling.

Drilling Engineer / Morten Laget



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Wellesley Petroleum
6255 – Wellesley Petroleum

COSLPromoter HSEQ
Own Experience
Planning 35/11-29 S
Toppand East
Other 30/05/2024 During the operation (22.05.24) an observation card was written that there was not a proper . . .

Ã…se Kristin Pettersen / Ã…se Kristin Pettersen



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Wellesley Petroleum
6257 – Wellesley Petroleum

COSLPromoter, COSL Promoter Drilling Operational 35/11-5, 39/11-29S
Toppand East
Top hole 30/05/2024
– Due to short length from bit to stab ( approx 0.5m) it is challenging to install master bushing . . .

Drilling Engineer / Morten Laget


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Wellesley Petroleum
6258 – Wellesley Petroleum

COSLPromoter, COSL Promoter Drilling Planning 35/11-5, 39/11-29S
Toppand East
Top hole 30/05/2024
– 9 1/2″ DC need high M/U torque and might need to use rig tongs.
– 9 1/2″ DC needs lifting subs . . .

Drilling Engineer / Morten Laget


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Wellesley Petroleum
6259 – Wellesley Petroleum

COSLPromoter, COSL Promoter Drilling Operational 35/11-5, 39/11-29S
Toppand East
Top hole 30/05/2024 The weight of the LPWHH was 15.4 ton w/o handling clamp and 17.2 tons with the handling clamp.

Drilling Engineer / Morten Laget


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Wellesley Petroleum
6260 – Wellesley Petroleum

COSLPromoter, COSL Promoter Drilling Operational 35/11-5, 39/11-29S
Toppand East
Top hole 30/05/2024 Low resolution on the bullseye with 5 deg, compared to the 2 deg we had on top. Needed to use a . . .

Drilling Engineer / Morten Laget


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PGNiG
6223 – PGNiG

Deepsea Yantai HSEQ
Own Experience
Planning 6501/10-1
Tomcat
Other 08/05/2024
An evaluation of some changes was not documented.
A MOC process should cover any RELEVANT changes . . .

Ã…se Kristin Pettersen / Stig Seland


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DNO
6876 – DNO

Nobel Invincible HSEQ
NEA Q&A
Planning 2/6-7 S
Falstaff
N/A 02/05/2024

Fiskeridirektoratet fraråder at det blir gitt tillatelse til prøveboring. Som begrunnelse vises det . . .

Anniken Meisler / Anniken Meisler



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DNO
6875 – DNO

Nobel Invincible HSEQ
NEA Q&A
Planning 2/6-7 S
Falstaff
N/A 09/04/2024

Planlagt hamring for lederør med lydutsending som starter på et lavt nivå og øker gradvis til . . .

Anniken Meisler / Anniken Meisler



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Wellesley
6059 – Wellesley

No Rig No well Surface section 21/12/2023

Drilling Engineer


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Wellesley
6060 – Wellesley

Deepsea Yantai 35/10-10S
Carmen
Top hole 21/12/2023

Drilling Engineer


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PGNiG
6874 – PGNiG

No Rig Other
Own Experience
Planning 6501/10-1
Tomcat
N/A 06/11/2023 It is strong currents at the location, and it was very hard to keep the ROV stable when surveying . . .

Anniken Meisler / Anniken Meisler



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Wellesley
5937 – Wellesley

Deepsea Yantai Drilling
Own Experience
INTERNAL
Operational 35/10-10S
Carmen
Other 24/10/2023 During operation several MoC’s were made. A link to the risk register was enclosed in the MoC . . .

Ã…se Kristin Pettersen


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Wellesley
5936 – Wellesley

Deepsea Yantai Marine
Own Experience
Operational 35/10-10S
Carmen
CAN-Ductor 23/10/2023 Risk of WOW during Carmen CAN-Ductor installation and recovery leading to Wellesley being . . .

Stian Engvik / Morten Laget


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