WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
252 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Top hole 16/06/2020 When cement was in place and 10 MT weight was slacked off conductor to set it on bottom, noticed the . . .


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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
256 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Production section 16/06/2020 The cement slurry for the 9 5/8″ casing was thick/sticky and caused cement pump suction problems . . .


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Wellesley
257 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Reservoir section 16/06/2020 Drilled 2 x wiper plugs and landing collar in 45 minutes using a milled tooth rock bit. 300 litres . . .


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Wellesley
258 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Reservoir section 16/06/2020 The mud engineer made a good displacement plan for displacing the well from SW to 1.25 sg mud. The . . .


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Wellesley
259 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Reservoir section 16/06/2020 The cold temperature in the riser and 300 m below seabed made the WBM more viscous than under normal . . .


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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
261 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
P&A 16/06/2020 After unlatching the BOP we forgot to remove the AX ring from the wellhead prior to pulling the BOP. . . .


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Wellesley
262 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
P&A 16/06/2020 The Weatherford MOST tool was successfully used in rotary mode. The tool was dressed such that the . . .


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Wellesley
263 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
P&A 16/06/2020 As on all previous wells, with the well displaced to seawater and wellhead cutting operations . . .


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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
1210 – Wellesley

Transocean Arctic HSEQ
PSA Q&A
Planning 35/4-2
Songesand
N/A 15/06/2020

Hvordan har dere vurdert robustheten i radarovervåkningen på Borgland Dolphin, f.eks.
a. Finnes det . . .

Karina Helle / Morten Laget


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Wellesley
1130 – Wellesley

Transocean Arctic Marine
PSA Q&A
Planning 35/4-2
Songesand
N/A 11/10/2018

Etter søknadens punkt 2.2 er det mange pockmarks i området. Skal noen av ankerlinene ligge over dem, . . .

Karina Helle / Morten Laget


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Wellesley
1132 – Wellesley

Transocean Arctic Marine
PSA Q&A
Planning 35/4-2
Songesand
N/A 11/10/2018

Slik vi leser punkt 6.4.3 om kollisjonsrisiko, skriver dere at sannsynligheten for å få kollisjoner . . .

Karina Helle / Morten Laget


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Wellesley
1134 – Wellesley

Transocean Arctic HSEQ
PSA Q&A
Planning 35/4-2
Songesand
N/A 11/10/2018

Hvordan vil Wellesley påse at eventuelle utestående aksjoner innen arbeidsmiljø på Transocean Arctic . . .

Karina Helle / Morten Laget


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Wellesley
1135 – Wellesley

Transocean Arctic Marine
PSA Q&A
Planning 35/4-2
Songesand
N/A 11/10/2018

Angående Smartblue-løsningen. Ber om en nærmere redegjørelse for valget opp mot døgnkontinuerlige . . .

Karina Helle / Morten Laget


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Wellesley
1136 – Wellesley

Transocean Arctic HSEQ
PSA Q&A
Planning 35/4-2
Songesand
N/A 11/10/2018

Partnerinvolvering i forbindelse med risikovurdering av grunn gass og topp hulls borestrategi.

Karina Helle / Morten Laget


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