WE Report

Lessons Learned

Lessons Learned865

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

DNO
317 – DNO

 		Island Innovator Drilling Operational 6507/7-16 S
Canela		 Production section 07/01/2019 Drilled section with planned mud and mud weight without problems with cavings. Cavaings identified . . .


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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
320 – DNO

 		Island Innovator Drilling Operational 6507/7-16 S
Canela		 Production section 07/01/2019 Great care taken breaking circulation at casing TD/washing down to land off. Used 100 lpm steps, . . .


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DNO
321 – DNO

 		Island Innovator Drilling Operational 6507/7-16 S
Canela		 Production section 07/01/2019 High values of LOT/FIT expected; 1.95 sg EMW. Value of ESD measured by LWD tool ahead of FIT was . . .


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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
324 – DNO

 		Island Innovator Drilling Operational 6507/7-16 S
Canela		 Reservoir section 07/01/2019 …., F/C at shoe, 400 liter gain in trip tank. Closed in well, checked for PBU (none), RIH to TD, . . .


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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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DNO
1237 – DNO

 		Borgland Dolphin Other
PSA Findings		 Other A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 22/03/2018

Karina Helle / Morten Laget


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DNO
1234 – DNO

 		Borgland Dolphin Other
PSA Findings		 Other A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 23/11/2017

Karina Helle / Morten Laget


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DNO
1235 – DNO

 		Borgland Dolphin Other
PSA Findings		 Other A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 08/06/2017

Karina Helle / Morten Laget


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DNO
1232 – DNO

 		Borgland Dolphin HSEQ
PSA Findings		 Other A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 11/11/2016

Karina Helle / Morten Laget


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DNO
1231 – DNO

 		Borgland Dolphin Drilling
Experience Transfer Meeting		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 N/A 06/06/2012 DONG handover documentation: The OCG 15 section 8.51 states to pump TSW when pressure testing the . . .

Use normal SW, this is available at the cement unit. The fluid will anyway be bleed back after . . .
Karina Helle / Morten Laget


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DNO
1229 – DNO

 		Borgland Dolphin Drilling
Experience Transfer Meeting		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 N/A 12/05/2012 DONG handover documentation: Confusion due to joints marked with two different joint numbers (in . . .

If reuse of pipe: Hide old joint number with paint and mark with new number. Use either white or . . .
Karina Helle / Morten Laget


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DNO
1230 – DNO

 		Borgland Dolphin Drilling
Experience Transfer Meeting		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 N/A 12/05/2012 DONG handover documentation: Again challenges where seen due to backflow when RIH on DP / HWDP. . . .

In future include a flapper valve in the running string. Either below hanger setting tool (just . . .
Karina Helle / Morten Laget


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DNO
1228 – DNO

 		Borgland Dolphin Drilling
Experience Transfer Meeting		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 N/A 11/05/2012 DONG handover documentation: When drilling 8-1/2″ with 9-1/4″ underreamer a section of the hole was . . .

When circulating at TD, position string so calliper can verify ID’s above and below UR shoulder. If . . .
Karina Helle / Morten Laget


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