WE Report

Lessons Learned

Lessons Learned865

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

Faroe
294 – Faroe

 		Transocean Arctic Drilling Operational 31/7-3 A
Brasse		 Reservoir section 03/10/2019 After engaging fish in overshot an electrical release of cable head (ECRD) was planned. Due to . . .


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Faroe
295 – Faroe

 		Transocean Arctic Drilling Operational 31/7-3 A
Brasse		 Reservoir section 03/10/2019 Unable to release cable head after engaging fish -> reverse cut and thread operation next. . . .


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Faroe
287 – Faroe

 		Transocean Arctic Drilling Operational 31/7-3 S
Brasse		 Top hole 02/10/2019 Had to lay out one joint of fibreglass innerstring due to not able to M/U connection. No visible . . .


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Faroe
288 – Faroe

 		Transocean Arctic Drilling Operational 31/7-3 S
Brasse		 Top hole 02/10/2019 Had relatively short rig move where operations ended with OBM and next well started with WBM. . . .


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Faroe
289 – Faroe

 		Transocean Arctic Drilling Operational 31/7-3 S
Brasse		 Top hole 02/10/2019 Seabed visibility poor and current high when cementing 30″ conductor. Inclination on bullseyes . . .


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Faroe
290 – Faroe

 		Transocean Arctic Drilling Operational 31/7-3 S
Brasse		 Intermediate section 02/10/2019 Pumped 3 x 20 m3 pills at section TD vs 2 x 20 m3 pills programmed. Not sure if made a difference, . . .


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Faroe
279 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 P&A 01/10/2019 Had to remove top stabbing guide on IRN to be able to M/U MPT (45 cm handling pup below). Reason for . . .


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Faroe
281 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 P&A 01/10/2019 Bent two singles 5 1/2″ HWDP while tagging top of surfacec cement plug after pulling BOP.


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Faroe
282 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 P&A 01/10/2019 Thread on tension mandrel was damaged in town (used for connecting Weatherford MOST tool to rotary . . .


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Faroe
284 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 P&A 01/10/2019 The 18 3/4″ HP housing lock ring released after cutting the 20″ casing with 20 mt overpull. . . .


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Faroe
273 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 Intermediate section 30/09/2019 The 5 1/2″ DP handling pup made up to the 9 5/8″ casing hanger running tool was too short. The . . .


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Faroe
274 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 Intermediate section 30/09/2019 Tagged fill 30 m above casing hanger landing depth/ casing shoe 36 m off bottom. Washed heavy casing . . .


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Faroe
275 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 Intermediate section 30/09/2019 Unable to set 9 5/8″ seal assembly. Observed initial pressure increase but unable to pass 100-120 . . .


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Faroe
276 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 Intermediate section 30/09/2019 The overpull margin was down to only 26 mt at the end, while running the heavy and long 9 5/8″ . . .


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PGNiG
334 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Rig move 16/09/2019 Fiberglass innerstring joints for conductor (Halliburton Coring) not delivered for spudboat . . .


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PGNiG
333 – PGNiG

 		Deepsea Nordkapp Drilling Operational 6507/5-9 S, 6507/5-9 A
Shrek		 Rig move 12/09/2019
* B/U 9 7/8” BHA not delivered on time, but 3.5 days later than requested
* 8” backup contingency . . .


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PGNiG
269 – PGNiG

 		Deepsea Nordkapp Drilling Planning 6507/5-9 S
Shrek		 N/A 02/09/2019
The project was quite unorganized with a lot of revisions and outdated info provided to the . . .


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PGNiG
268 – PGNiG

 		Deepsea Nordkapp Drilling Planning 6507/5-9 S
Shrek		 N/A 26/08/2019
Poor communication between NOV and Halliburton regarding delivery of crucial elements (9 1/2″ . . .


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Wellesley
206 – Wellesley

 		Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen		 Production section 07/02/2019 Unable to release CRTi tool after using it for the first time (above). Spent 30 min. And called . . .


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Wellesley
210 – Wellesley

 		Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen		 Production section 07/02/2019 Problems experienced with poor quality of pre-doped connections. Remains of rusty water and storage . . .


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