WE Report

Lessons Learned

Lessons Learned865


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

Wellesley
5844 – Wellesley

Deepsea Yantai Drilling Operational 35/10-10 A
Carmen
Production section 10/07/2023 Needed several trips with the tool up in the casing to cool it down.

Drilling Engineer / Morten Laget


PDF


Edit


Wellesley
5157 – Wellesley

Deepsea Yantai Drilling
Own Experience
Operational 35/10-10S
Carmen
Production section 24/04/2023 It was done before the cementer got the change to da a pre-job check / install bypass baffle etc.

Drilling Engineer / Morten Laget


PDF


Edit


Wellesley
5159 – Wellesley

Deepsea Yantai Drilling Operational 35/10-10S
Carmen
Production section 24/04/2023
Downtime due to reduced ROP after going to max ROP of 75 m/hr:
– Started with 30 m/hr
– Jumped up . . .

Drilling Engineer / Morten Laget


PDF


Edit


Wellesley
5160 – Wellesley

Deepsea Yantai Drilling Operational 35/10-10S
Carmen
Production section 24/04/2023
Lube mud had 1.34 sg when taken up.
Needed to weight it down to ± 1.25 sg.
New lube mud for 12 . . .

Drilling Engineer / Morten Laget


PDF


Edit


Wellesley
5115 – Wellesley

Deepsea Yantai Drilling Operational Eirik (OMV) Production section 30/03/2023 If we are leaning to one of the sides it is easy to hang up in something which can result in a . . .

Sander Schaathun / Morten Laget


PDF


Edit


Wellesley
2401 – Wellesley

Borgland Dolphin Drilling
Own Experience
Operational 36/1-4
Hemispheres
Production section 30/12/2021 ALL mud skips was put on the same boat, effectively removing any hope for recieving backload on said . . .

Drilling Engineer / Morten Laget


PDF


Edit


Wellesley
234 – Wellesley

Transocean Arctic Drilling Operational 35/11-21 S
Grosbeak West
Production section 16/06/2020 Good experience M/U 9 5/8″ VAM21 CWD2 joint with drilling bails rather than longer casing bails. . . .


PDF


Edit


Wellesley
256 – Wellesley

Transocean Arctic Drilling Operational 35/4-2
Songesand
Production section 16/06/2020 The cement slurry for the 9 5/8″ casing was thick/sticky and caused cement pump suction problems . . .


PDF


Edit


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 . . .


PDF


Edit


Wellesley
207 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 07/02/2019 AxeBlade Bit performed well, did not create stick-slip.


PDF


Edit


Wellesley
208 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 07/02/2019 The Halliburton BSS “skip & ship” system worked very well. There was no problem handling60 m/hr . . .


PDF


Edit


Wellesley
209 – Wellesley

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


PDF


Edit


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 . . .


PDF


Edit


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 . . .


PDF


Edit


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 . . .


PDF


Edit


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 . . .


PDF


Edit


Wellesley
183 – Wellesley

Transocean Arctic Drilling Operational 35/12-7
Serin
Production section 05/02/2019 Drilled stab-in float collar in only 50 minutes, but used 3.5 hrs to drill shoe, which is more than . . .


PDF


Edit


Wellesley
184 – Wellesley

Transocean Arctic Drilling Operational 35/12-7
Serin
Production section 05/02/2019 Had to lay out several joints due to missing threads on top of pin ends, (9 5/8″, #53.3, P-110, . . .


PDF


Edit


Wellesley
201 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 05/02/2019 Tried to shear OBM mud in pits before drilling the 12 1/4″ section. At this time the well and all . . .


PDF


Edit


Wellesley
204 – Wellesley

Transocean Arctic Drilling Operational 35/12-6 S
Kallåsen
Production section 05/02/2019 Coating from 9 5/8″ casing blocked dices on Franks casing tong (upper jaws). Had to frequently clean . . .


PDF


Edit


New Lesson Learned

You do not have permission to view this form.




\n\t\t

\n\t\t\t\n\t\t\t