WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
211 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 07/02/2019 The pump strokes and volume pumped (from pit sensors) matched very well from 0-83 m3 mud pumped . . .


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Wellesley
212 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 07/02/2019 All 3 wiper plug shears & burst were clearly seen during this cement job; bottom plug shear, top . . .


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Wellesley
213 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 07/02/2019 Trip sheet from Geoservice and Transocean has shown different numbers. In addition, gains have been . . .


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Wellesley
214 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Reservoir section 07/02/2019 Investigated two sensor systems in TT.


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Wellesley
215 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Reservoir section 07/02/2019


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Wellesley
216 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Reservoir section 07/02/2019 After POOH with 8 1/2″ BHA (prior to coring), decided to not run same due to wear on teeth coating. . . .


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Wellesley
217 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Reservoir section 07/02/2019 Junk was found in core barrel (piece of coiled copper plated spring steel). Possibly a piece of . . .


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Wellesley
218 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Reservoir section 07/02/2019 While RIH with 8 1/2″ BHA, noticed 2 cm missing from one of slip segments. Checked rest of dog . . .


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Wellesley
219 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Reservoir section 07/02/2019 Galled monel connection on LWD string when POOH from initial TD 3102 m (between sonic and crossover . . .


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Wellesley
220 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Reservoir section 07/02/2019 Not enough weight on jar when drilling with 8 1/2″ rock bit in order to drill with jar in tension. . . .


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Wellesley
221 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019 Not enough cuttings skips for P&A cement plugs.


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Wellesley
222 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019 Halliburton planned for 15 m3 spacer for an 11 m3 slurry volume.


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Wellesley
223 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019


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Wellesley
224 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019 WOC for cement plugs in OBM prior to dressing off.


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Wellesley
225 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019


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Wellesley
226 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019 Neck on lower part of MPT too short for making up MPT to DP with IRN when using 13 3/8″ adapter for . . .


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Wellesley
227 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019


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Wellesley
228 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
N/A 07/02/2019


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Wellesley
229 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019 The cutting assembly was spaced out wrong from Slb in town. Bull nose and bottom stab below cutter . . .


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Wellesley
230 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
P&A 07/02/2019 Both primary and secondary cutter assembly was delivered with 6 5/8″ handling subs, torqued up to 50 . . .


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