WE Report

Lessons Learned

Lessons Learned865


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

DNO
300 – DNO

Island Innovator HSEQ Planning 6507/7-16 S
Canela
N/A 07/01/2019 Confusion regarding alert to the PSA on a medevac caused by sentence in Emergency Prepardness . . .


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DNO
304 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Rig move 07/01/2019 DP trial was performed, spent 5 effective hours (+ 3 hours WOW).


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DNO
305 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Top hole 07/01/2019 Conductor set up early. Had to order out more dispersant chemicals for the 20″ cement job due to . . .


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DNO
306 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Top hole 07/01/2019 The cement design was updated with reduced lead and increased tail slurry to provide better support . . .


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DNO
307 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Pilot hole section 07/01/2019 Pilot hole encountered shallow gas. Observed shallow gas flowing out of well when RIH to open up . . .


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DNO
308 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Pilot hole section 07/01/2019 Pilot hole drilled to TD before identifying shallow gas. Resulted in having to order out more . . .


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DNO
309 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Surface section 07/01/2019 Not able to use the IRN to MU the motor assembly to the ARC-9 assembly due to short distance between . . .


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DNO
310 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Surface section 07/01/2019 Not optimal cement recipe, needed 25 min to clean tanks between lead and tail slurry.


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DNO
311 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Surface section 07/01/2019 Cement slurry was changed to a gas-tigh slurry due to encountering shallow gas in pilot hole. Due to . . .


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DNO
313 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Intermediate section 07/01/2019 The 17 1/2″ bit was damaged, when 45 mt WOB was experienced while drilling with large rig heave. . . .


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DNO
315 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Intermediate section 07/01/2019 Had to increase MW from the planned 1.48 sg to 1.52 sg at TD due to cavings.


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DNO
318 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 Used the 1 x 2 m pup, had we crossed threads we had no back-up.


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DNO
322 – DNO

Island Innovator HSEQ Operational 6507/7-16 S
Canela
N/A 07/01/2019 Unplanned contamination of DW tanks with SW.


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DNO
323 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
N/A 07/01/2019 Unplanned contamination of Versatec 1.52 sg OBM with DW – OWR increased from 70/30 to 60/40. Checked . . .


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DNO
325 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 Only one subsea engineer on rig.


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DNO
326 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
N/A 07/01/2019 Fluid slopping into flowline from shaker pits due to Free Surface Effect during periods of high rig . . .


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DNO
327 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Reservoir section 07/01/2019 ESD accidentally operated in wireline unit.


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DNO
328 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
P&A 07/01/2019 During POOH with 9 5/8″ cutting assembly the pipe lifted out of slips due to knives hanging up in WB . . .


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DNO
329 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
P&A 07/01/2019 During M/U of 20″x36″ cutting assembly (MOST tool), had to break off MOST tool above space out pup . . .


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Faroe
277 – Faroe

Transocean Arctic Drilling Operational 30/6-30
Rungne
Reservoir section 01/01/2019 Made first connection on core BHA #3. This 64 m core BHA would require 2 connections on bottom. . . .


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