WE Report

Lessons Learned

Lessons Learned865


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

INEOS
2279 – INEOS

Borgland Dolphin Drilling
Own Experience
Planning 6306/3-1 S
Fat Canyon
Intermediate section 07/11/2021 9 5/8″ float shoe filled up with mud.

Drilling Supervisor / Morten Laget


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INEOS
2280 – INEOS

Borgland Dolphin Drilling
Own Experience
Operational 6306/3-1 S
Fat Canyon
Intermediate section 07/11/2021 Had initially many problems with Franks equipment that did not work, and cold windy weather outside . . .

Drilling Supervisor / Morten Laget


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INEOS
2275 – INEOS

Borgland Dolphin Drilling
Own Experience
Operational 6306/3-1 S
Fat Canyon
Intermediate section 06/11/2021 Had two bit trips with very low, down to 1 m/hr ROP

Drilling Supervisor / Morten Laget


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INEOS
3407 – INEOS

Borgland Dolphin Drilling
Own Experience
Operational PL937
Fat Canyon
Intermediate section 04/11/2021
ROP in 12 1/4″ section dropped to almost nothing at +/- 1900 m. Drilling parameters were varied, and . . .

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INEOS
2269 – INEOS

Borgland Dolphin Drilling
Own Experience
Operational 6306/3-1 S
Fat Canyon
Intermediate section 31/10/2021 ROP dropped from 50 m/hr to 1 m/hr

Drilling Supervisor / Morten Laget


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DNO
2108 – DNO

Borgland Dolphin Drilling
Own Experience
Operational 2/5-15
Gomez
Intermediate section 05/09/2021
The PAB system failed before the cement job due to water ingress inside the unit which caused some . . .

Drilling Supervisor / Morten Laget


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Wellesley
243 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 A
Grosbeak
Intermediate section 16/06/2020 The remote operated lo-torq valve was installed with an elbow between side inlet and lo-torq, while . . .


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Wellesley
244 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 A
Grosbeak
Intermediate section 16/06/2020 Making up cmt. Stand into landing string prior to landing 9 5/8″ casing was done by use of chain . . .


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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
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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Faroe
270 – Faroe

Transocean Arctic Drilling Operational 30/6-30
Rungne
Intermediate section 27/09/2019 Difficult to achieve data acqusition requirement of 10 m samples.


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Faroe
271 – Faroe

Transocean Arctic Drilling Operational 30/6-30
Rungne
Intermediate section 27/09/2019 Observed stick-slip while drilling through sand intervals and after a limestone stringer.


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Faroe
272 – Faroe

Transocean Arctic Drilling Operational 30/6-30
Rungne
Intermediate section 27/09/2019 Axebalde bit with v-shaped cutters drilled through most limestone stringers without any reduction in . . .


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DNO
312 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Intermediate section 07/01/2019 The 17 1/2″ section was drilled, but it proved difficult to get hold of Glycol for the KCl mud.


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DNO
313 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Intermediate section 07/01/2019 The 17 1/2″ bit was damaged, when 45 mt WOB was experienced while drilling with large rig heave. . . .


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DNO
314 – DNO

Island Innovator Drilling Operational 6507/7-16 S
Canela
Intermediate section 07/01/2019 KCl WBM was used for drilling the 17 1/2″ section to 1200 m. The hole was observed in good condition . . .


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DNO
315 – DNO

Island Innovator Drilling Planning 6507/7-16 S
Canela
Intermediate section 07/01/2019 Had to increase MW from the planned 1.48 sg to 1.52 sg at TD due to cavings.


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