WE Report

Lessons Learned

Lessons Learned865


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

DNO
1157 – DNO

Borgland Dolphin Drilling
Experience Transfer Meeting
Planning A-1 H, A-2 H, A-3 HT2
Oselvar
N/A 08/09/2020 Onshore spares/stocks were limited landing string sourced 3rd party.

Actions Required for Oselvar: Minimum 6 moths planning time
Identify LLI early
Secure small volume . . .
Karina Helle / Morten Laget



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DNO
1159 – DNO

Borgland Dolphin Drilling
Experience Transfer Meeting
Reporting A-1 H, A-2 H, A-3 HT2
Oselvar
N/A 08/09/2020
Reduced operational efficiency due to poor weather.
Developed a method to lay out completion . . .

Actions Required for Oselvar: Plan for lay out of completion tubulars
Secure efficient operations . . .
Karina Helle / Morten Laget



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Wellesley
483 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Surface section 05/09/2020 Ran MPT tool dressed to pull extended wear bushing. Successfully engaged and sheared out but hung up . . .

Drilling Supervisor


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Wellesley
481 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 03/09/2020
Made up shoe track to maximum torque. On attempting to change torque values in JAM system to optimum . . .

Drilling Supervisor


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Wellesley
476 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 02/09/2020 Due to shallow gas zone at 331m, needed to fill casing with mud to be ready in case of need to wash . . .

Drilling Supervisor


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Wellesley
473 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 01/09/2020 To be able to use it for BHA-handling, a hole was made in the protector.

Drilling Engineer


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Wellesley
474 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 01/09/2020
Hit shallow gas at 331m, only 24m below 36″ conductor shoe. Killed with 1.50 SG kill mud. Drilled . . .

Drilling Supervisor


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Wellesley
475 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 01/09/2020
Hit shallow gas at 331m, only 24m below 36″ conductor shoe. Killed with 1.50 SG kill mud. Drilled . . .

Drilling Supervisor


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Wellesley
467 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 31/08/2020 More manual handling and time spent in addition to less efficient handling when not having all BHA . . .

Drilling Engineer


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Wellesley
464 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 27/08/2020 No fill on 36″ hole wiper trip. Ran 30″ conductor, found 1m fill on bottom. Washed to bottom, picked . . .

Drilling Supervisor


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Wellesley
465 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 27/08/2020 Good suggestion from Dolphin not to do this as in past fibreglass tubing has broken due to vibration . . .

Drilling Supervisor


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Wellesley
462 – Wellesley

Borgland Dolphin Drilling Planning 6204/11-3
Schweinsteiger
26/08/2020 To low budget time on rig move

Morten Laget


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Wellesley
463 – Wellesley

Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger
Top hole 26/08/2020
Bentonite loaded onto rig in fjord but problems transferring from silos to surge tank in pit room . . .

admin


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Wellesley
450 – Wellesley

Borgland Dolphin Drilling Planning 6204/11-3
Schweinsteiger
N/A 12/08/2020 Slow progress and no clear recommendations.

Morten Laget


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Wellesley
233 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 S
Grosbeak West
Surface section 16/06/2020 Several joints had to be broken out and made up again due to difficulties with centralizing joints . . .


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Wellesley
234 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 S
Grosbeak West
Production section 16/06/2020 Good experience M/U 9 5/8″ VAM21 CWD2 joint with drilling bails rather than longer casing bails. . . .


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Wellesley
235 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 S
Grosbeak West
Reservoir section 16/06/2020 Dropped 2 15/16″ drift to check 5 1/2″ DP/HWDP prior to coring (coring ball 1 1/4″). The drift was . . .


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Wellesley
236 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 S
Grosbeak West
Reservoir section 16/06/2020 720 litres of crude oil was left in bottom of well after MDT sampling on wireline. The MDT run was 2 . . .


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Wellesley
243 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 A
Grosbeak
Intermediate section 16/06/2020 The remote operated lo-torq valve was installed with an elbow between side inlet and lo-torq, while . . .


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Wellesley
244 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 A
Grosbeak
Intermediate section 16/06/2020 Making up cmt. Stand into landing string prior to landing 9 5/8″ casing was done by use of chain . . .


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