WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
246 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 A
Grosbeak
Reservoir section 16/06/2020 Inner bushing with cut-out for wireline was not mobilized for this wireline conveyed logging job. A . . .


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Wellesley
247 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 A
Grosbeak
Reservoir section 16/06/2020 During sampling it was found out that the exit point was not consistent to be on top of the FTWT . . .


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Wellesley
248 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 A
Grosbeak
Reservoir section 16/06/2020 Max flowrate for extracting formation fluid with the FTWT tool was said to be 6-7 lpm. During this . . .


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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
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
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
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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PGNiG
393 – PGNiG

Deepsea Nordkapp Drilling
INTERNAL
Planning 6507/5-9 S, 6507/5-9 A
Shrek
N/A 13/03/2020 WE not aligned internally in weekly project meetings with client.


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PGNiG
394 – PGNiG

Deepsea Nordkapp Drilling
INTERNAL
Planning 6507/5-9 S, 6507/5-9 A
Shrek
N/A 13/03/2020 A lots of argument regarding Logging of casing, dressing off of cement plugs, running lock ring . . .


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PGNiG
395 – PGNiG

Deepsea Nordkapp Drilling
INTERNAL
Planning 6507/5-9 S, 6507/5-9 A
Shrek
N/A 13/03/2020 A lot of extra work was promised orally to PGNiG.


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PGNiG
396 – PGNiG

Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek
N/A 13/03/2020 More slops backloaded than planned using Halliburton BSS. Amount of slop backloaded; 836 m3 + 200 m3 . . .


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PGNiG
397 – PGNiG

Deepsea Nordkapp Drilling
INTERNAL
Planning 6507/5-9 S, 6507/5-9 A
Shrek
N/A 13/03/2020 Non-conformance: Chemicals in AfD different from chemicals used in operation. Did not obtain HOCNF . . .


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PGNiG
398 – PGNiG

Deepsea Nordkapp Drilling
INTERNAL
Planning 6507/5-9 S, 6507/5-9 A
Shrek
N/A 13/03/2020 Non-conformance from AfD: Exceeded the discharge permit due to failure of MRR.


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