WE Report

Lessons Learned

Lessons Learned865

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

DNO
1993 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-1 H
Oselvar		 P&A 19/07/2021 Jacked 9 5/8″ free using Baker Mastodon jacking tool. Used 49 pressure cycles to jack casing 17 m, . . .

Drilling Supervisor / Stig Seland



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DNO
1991 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-3 HT2
Oselvar		 P&A 13/07/2021 Pulled pack off assembly free. Flow checked well. Pulled MPT with pack off assembly above BOP. . . .

Drilling Supervisor / Stig Seland



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DNO
1457 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-3 HT2
Oselvar		 P&A 03/05/2021 Concerns were raised that with the HXT landed on the 105 ton skid as planned the bumper bars on the . . .

Drilling Supervisor / Stig Seland



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DNO
1426 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-3 HT2
Oselvar		 P&A 20/04/2021
Evaluated rig-up and HXT valve and BOP status. Changed HXT valve status to the following: opened LPR . . .

Drilling Supervisor / Stig Seland



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DNO
1427 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-3 HT2
Oselvar		 P&A 20/04/2021
Optimised process as follows:
Lined up rig BOP Lower Kill line to rig choke manifold and . . .

Drilling Supervisor / Stig Seland



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DNO
1396 – DNO

 		Borgland Dolphin Well test
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 05/04/2021 We discussed the option 1) of hanging the entire landings string with Wellsafe Explorer weak links, . . .

Drilling Supervisor / Stig Seland



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DNO
986 – DNO

 		Borgland Dolphin Other Planning A-1 H, A-2 H, A-3 HT2
Oselvar		 N/A 05/11/2020 Went through the detailed operational steps early in the planning phase (DG2) with relevant . . .

Øystein Prytz


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Wellesley
555 – Wellesley

 		Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger		 Top hole 21/09/2020 Took onboard 90 m3 ready mixed kill mud in Stolsfjorden

Drilling Supervisor


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Wellesley
556 – Wellesley

 		Borgland Dolphin Logistics Operational 6204/11-3
Schweinsteiger		 Rig move 21/09/2020 19 persons booked transport by bus to Fedafjorden. Positive feedback from service companies and . . .

Johan Kjos-Hanssen


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Wellesley
1063 – Wellesley

 		Borgland Dolphin Logistics Operational 6204/11-3
Schweinsteiger		 Top hole 15/09/2020 Rig Required extra Barite at short notice due to challenges in top hole. PSV delivered Approximately . . .

Johan Kjos-Hanssen


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Wellesley
498 – Wellesley

 		Borgland Dolphin 6204/11-3
Schweinsteiger		 09/09/2020 Increased MW to 1.20 SG on bottom of 12 1/4″ section

Drilling Supervisor


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DNO
1160 – DNO

 		Borgland Dolphin Multidicipline
Experience Transfer Meeting		 Planning A-1 H, A-2 H, A-3 HT2
Oselvar		 N/A 08/09/2020
Site visit and good communication.
Good rig-to-platform interface.
High level of support during . . .

Actions Required for Oselvar: Plan for site visits
Interface management
Proper facilitation of . . .
Karina Helle / Morten Laget



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DNO
1161 – DNO

 		Borgland Dolphin HSEQ
Experience Transfer Meeting		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 N/A 08/09/2020 Low reactive safety figures.

Actions Required for Oselvar: Look into a system for follow up of safety performance
Karina Helle / Morten Laget



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DNO
1162 – DNO

 		Borgland Dolphin Multidicipline
Experience Transfer Meeting		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 N/A 08/09/2020
Efficient switch to suspension mode.
Flexibility due to Covid-19.

Actions Required for Oselvar: Prepare for contingencies
Karina Helle / Morten Laget



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DNO
1163 – DNO

 		Borgland Dolphin Logistics
Experience Transfer Meeting		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 N/A 08/09/2020
Experience transfer meeting, Schooner & Ketch: Efficient mibilisation and backload
Minimal best . . .

Karina Helle / Morten Laget



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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
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
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
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
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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