WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
3373 – Wellesley

Borgland Dolphin Marine
Own Experience
Operational 36/1-4
Hemispheres
Rig move 18/02/2022 Uncontrolled runout of anchor and chain

Stian Engvik / 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
2322 – Wellesley

Borgland Dolphin Logistics
Own Experience
Operational 36/1-4
Hemispheres
Top hole 23/12/2021
It was observed in the manifest that the connection on the 13 3/8″ swages was Vam21, in addition to . . .

Drilling Engineer / Morten Laget


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Wellesley
466 – Wellesley

Borgland Dolphin Marine Operational 6204/11-3
Schweinsteiger
Rig move 31/08/2020 When work wire and pre-laid mooring line was retrieved after vessel had received rig PCP, . . .

Stian Engvik / Morten Laget



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Wellesley
472 – Wellesley

Borgland Dolphin SmartBlue
INTERNAL
Setup 6204/11-3
Schweinsteiger
Connection 31/08/2020 Unable to adapt to rig-networks subnet

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Wellesley
243 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 A
Grosbeak
Intermediate section 16/06/2020 The remote operated lo-torq valve was installed with an elbow between side inlet and lo-torq, while . . .


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Wellesley
253 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Surface section 16/06/2020 The back-up 18 3/4″ wellhead assembly was sent out incomplete, without running tool, 9 m DP mandrel, . . .


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Wellesley
254 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Surface section 16/06/2020 Used 2 x pup joints due to aim of +-2 m rathole. The 2 m pup was difficult to make up due to the . . .


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Wellesley
255 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Top hole 16/06/2020 The handling pup was 3 m which was not long enough to get the WH below rotary and get the tuggers up . . .


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Wellesley
260 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Reservoir section 16/06/2020 Noticed several times that “slugs” of cuttings would reach the shakers for no good reason.


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Wellesley
264 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
N/A 16/06/2020 Have been lucky all campaign not to have had any problems with the Halliburton OBM cuttings blower.


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Wellesley
265 – Wellesley

Transocean Arctic Drilling Operational 25/1-13
Balcom
P&A 16/06/2020 Unable to run Weatherford 9 5/8″ casing cuting assembly past wellhead. Found out that spiral . . .


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Wellesley
206 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 07/02/2019 Unable to release CRTi tool after using it for the first time (above). Spent 30 min. And called . . .


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Wellesley
210 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 07/02/2019 Problems experienced with poor quality of pre-doped connections. Remains of rusty water and storage . . .


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Wellesley
212 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 07/02/2019 All 3 wiper plug shears & burst were clearly seen during this cement job; bottom plug shear, top . . .


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Wellesley
218 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Reservoir section 07/02/2019 While RIH with 8 1/2″ BHA, noticed 2 cm missing from one of slip segments. Checked rest of dog . . .


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Wellesley
225 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019


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Wellesley
226 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019 Neck on lower part of MPT too short for making up MPT to DP with IRN when using 13 3/8″ adapter for . . .


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Wellesley
227 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019


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Wellesley
229 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019 The cutting assembly was spaced out wrong from Slb in town. Bull nose and bottom stab below cutter . . .


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