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
1990 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-3 HT2
Oselvar		 P&A 13/07/2021 Set 20″ EZSV at 694,5 m according to procedure. Tagged EZSV with 10 t. Pressured up to 50 bar, no . . .

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
1968 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 30/06/2021 Initially believed that we did not get a good pressure test (Formation Integrity Test). Suspected . . .

Drilling Supervisor / Stig Seland



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DNO
1554 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 03/06/2021 Overtorqued connection required cold cutting

Drilling Supervisor / Stig Seland



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DNO
1546 – DNO

 		Borgland Dolphin Multi Discipline
Own Experience
INTERNAL		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 27/05/2021 Unstable and sometimes no connection at all. Poor sound quality during meetings with the rig.

Øystein Prytz / Stig Seland



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DNO
1456 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-3 HT2
Oselvar		 P&A 03/05/2021 Both sides of the UHG can be used on the TRT but the port side of the UHG comes into conflict with . . .

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
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
1429 – DNO

 		Borgland Dolphin Drilling Operational A-3 HT2
Oselvar		 P&A 20/04/2021 Operations completed successfully, but forgot to flush lines from SFT to bleed-off package with . . .

Drilling Supervisor / Stig Seland



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DNO
1420 – DNO

 		Borgland Dolphin Subsea
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 15/04/2021 Unable to jar upper crown plug free. POOH and changed to hydraulic jar. Jarred upper crown plug free . . .

Drilling Supervisor / Stig Seland



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DNO
1416 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 10/04/2021 Had only 1 Dolphin sub sea engineer. He had to work overtime, and OIM had to make deviation. . . .

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
1395 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 04/04/2021 Landing string got stuck after pulling 7 m. Possible stuck with SSTT at marine riser flex joint, OR . . .

Drilling Supervisor / Stig Seland



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DNO
1394 – DNO

 		Borgland Dolphin Logistics
Own Experience
INTERNAL		 Operational A-3 HT2
Oselvar		 Subsea work 03/04/2021 The POB got maxed out and there were no Covid-19 emergency cabins available at the time. Also, a . . .

Drilling Engineer / Stig Seland



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Wellesley
1365 – Wellesley

 		Borgland Dolphin Marine
Own Experience		 Operational 6204/11-3
Schweinsteiger		 Rig move 09/03/2021 Two(2) harbour tugs were contracted by Dolphin Drilling to assist in holding Borgland Dolphin . . .

Stian Engvik / Morten Laget



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DNO
1361 – DNO

 		Borgland Dolphin Marine
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 Prelay 08/03/2021 By using 41deg fluke angles the anchors would not hold the required test tension

Stian Engvik / Morten Laget


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Wellesley
554 – Wellesley

 		Borgland Dolphin Drilling Operational 6204/11-3
Schweinsteiger		 Top hole 21/09/2020
Not able to load barite due to long transfer lines when loading on starboard side.
Bentonite ended . . .

Drilling Supervisor


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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
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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