WE Report

Lessons Learned

Lessons Learned865

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

DNO
2015 – DNO

 		Borgland Dolphin Drilling
Experience Transfer Meeting		 Operational 2/5-15
Gomez		 Surface section 14/08/2021 All handling subs had 5 1/2″ size. Had to spend rig time and expose rig crew in red zone changing . . .

Contact all vendors that deliver tools with handling subs to Borgland Dolphin
Drilling Supervisor / 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
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
253 – Wellesley

 		Transocean Arctic Drilling Operational 35/4-2
Songesand		 Surface section 16/06/2020 The back-up 18 3/4″ wellhead assembly was sent out incomplete, without running tool, 9 m DP mandrel, . . .


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Wellesley
254 – Wellesley

 		Transocean Arctic Drilling Operational 35/4-2
Songesand		 Surface section 16/06/2020 Used 2 x pup joints due to aim of +-2 m rathole. The 2 m pup was difficult to make up due to the . . .


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PGNiG
343 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019 Unable to locate XO sub (DC58/TT550 NOV/Intelserv) offshore for 17 ½” BHA. New crossover had to be . . .


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PGNiG
344 – PGNiG

 		Deepsea Nordkapp Drilling
INTERNAL		 Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019 WDP did not enhance the Shrek drilling operations in any significant capacity


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PGNiG
345 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019 IKM MRR 300 system (modified in lack of 500 system), failed to deliver adequate flow (3500lpm), . . .


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PGNiG
346 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019 IKM MRR: missing hoses between LARS and 90 degrees flowbend topside. Backloaded by Mi Swaco.


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PGNiG
347 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019 Exhaust from IKM generator causing fumes and issues being in cement office


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PGNiG
348 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019 XBAT was run on 17 1/2″ BHA regardless.


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PGNiG
349 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019 Elevator bushing for 13 3/8″ casing was missing on rig (backup to CRTi tool). This message was . . .


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PGNiG
350 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019
Unable to make up Dril-Quip 13 3/8” no cross coupling (VAM 21) to WH assembly (VAM 21).
Had to . . .


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PGNiG
351 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019
Silo #4 achieved desired pump rate (800 lpm) by opening the valves 7 %.
Silo #2 achieved same only . . .


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PGNiG
352 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019
Due to protecting melons on riser joints, the riser joints were not sufficiently balanced. This . . .


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PGNiG
353 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019 Observed last riser joint slipped out of RCWM trolley when picking up joint to vertical position . . .


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PGNiG
354 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Surface section 22/10/2019 Kelly hose trapped in Riser guard groove. Continued using straps around the guards to avoid . . .


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Wellesley
176 – Wellesley

 		Transocean Arctic Drilling Operational 35/12-7
Serin		 Surface section 05/02/2019 5 MT WOB proved insufficient, no drilling progress in hard formation. Was allowed to increase to 10 . . .


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Wellesley
177 – Wellesley

 		Transocean Arctic Drilling Operational 35/12-7
Serin		 Surface section 05/02/2019 The 50-80 RPM range given in HSG was insufficient. There was a need to rotate bit & BHA faster . . .


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Wellesley
178 – Wellesley

 		Transocean Arctic Drilling Operational 35/12-7
Serin		 Surface section 05/02/2019 ECD calculation in SG EMW done by the MWD softwaremight not be intuitive. The SG is normally . . .


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