WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
251 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 A
Grosbeak
P&A 16/06/2020 N/A


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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
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
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
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
387 – PGNiG

Deepsea Nordkapp Rig Intake Operational 6507/5-9 S, 6507/5-9 A
Shrek
N/A 04/02/2020 Not able to get access to sublease contracts (NOV with wired pipe, Oceaneering cost)


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PGNiG
388 – PGNiG

Deepsea Nordkapp Rig Intake Operational 6507/5-9 S, 6507/5-9 A
Shrek
N/A 04/02/2020 Contractor’s onshore organisation was very stretched in order to serve three customers (AkerBP, . . .


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PGNiG
389 – PGNiG

Deepsea Nordkapp Rig Intake Operational 6507/5-9 S, 6507/5-9 A
Shrek
N/A 04/02/2020 Rig sublease


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PGNiG
390 – PGNiG

Deepsea Nordkapp Rig Intake Operational 6507/5-9 S, 6507/5-9 A
Shrek
N/A 04/02/2020 PGNiG selected a PSV from AkerBP (Normand Skude) that was not performing very well. It turns out . . .


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