WE Report

Lessons Learned

Lessons Learned865

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

Faroe
291 – Faroe

 		Transocean Arctic Drilling Operational 31/7-3 A
Brasse		 Reservoir section 03/10/2019 It took 5 hours to drill the wiper plugs in the Weatherford liner. This is twice as long as normal. . . .


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Faroe
292 – Faroe

 		Transocean Arctic Drilling Operational 31/7-3 A
Brasse		 Reservoir section 03/10/2019 Stuck with wireline toolstring 1A ZAIT-PEX-PPC-MSIP-PPC-NGI-XPT at 2831 m, bottom of toolstring and . . .


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Faroe
293 – Faroe

 		Transocean Arctic Drilling Operational 31/7-3 A
Brasse		 Reservoir section 03/10/2019 Performed cut and thread operation to free stuck wireline cable and fish wireline toolstring 1A. . . .


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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
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
280 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 P&A 01/10/2019 Weatherford Whirl Tool, part of Wellbore Cleanout Tools used for brushing riser and jetting BOP. OD . . .


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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
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
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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Faroe
277 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 Reservoir section 01/01/2019 Made first connection on core BHA #3. This 64 m core BHA would require 2 connections on bottom. . . .


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Faroe
278 – Faroe

 		Transocean Arctic Drilling Operational 30/6-30
Rungne		 Reservoir section 01/01/2019 During POOH with coring assembly #3, took 70 mt overpull at 3250 m. After pulling further 9 m, got a . . .


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Faroe
169 – Faroe

 		Deepsea Bergen Drilling Operational 31/7-2 S
Brasse Appraisal		 P&A 28/09/2017 In DOP for pulling 9 5/8″ seal assembly, it was planned “Pick up with 3 ton overpull to check MPT . . .


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Faroe
170 – Faroe

 		Deepsea Bergen Drilling Operational 31/7-2 A
Brasse Appraisal		 Intermediate section 28/09/2017 During displacement from WBM to OBM (while drilling out cement), attempted to u-tube kill and choke . . .


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Faroe
174 – Faroe

 		Deepsea Bergen Drilling Operational 31/7-2 A
Brasse Appraisal		 Reservoir section 28/09/2017 When logging the 9 5/8” casing cement it was discovered during a repeat pass that the cement logs . . .


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