WE Report

Lessons Learned

Lessons Learned865


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

DNO
5860 – DNO

Deepsea Yantai Drilling
Own Experience
Planning 25/7-11 S
Norma
Top hole 30/07/2023 One of the stop collars fell of when it was picked up from the boat. When laying down the . . .

Drilling Engineer / Morten Laget


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DNO
5866 – DNO

Deepsea Yantai Drilling
Own Experience
Planning 25/7-11 S
Norma
Surface section 30/07/2023 Difficulties with logistics to separate the joints below 11.5 m and the joints longer due to limited . . .

Drilling Engineer / Morten Laget


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DNO
2014 – DNO

Borgland Dolphin Drilling
Experience Transfer Meeting
Operational 2/5-15
Gomez
Surface section 14/08/2021 The Franks split bushing spider (SBS) did not fit inside the EMSCO rotary table on Borgland Dolphin.

Get in contact with Franks coordinator in town?
Drilling Supervisor / Morten Laget


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DNO
1217 – DNO

Borgland Dolphin Drilling
Experience Transfer Meeting
Operational A-1 H, A-2 H, A-3 HT2
Oselvar
Production section 24/03/2012
DONG handover documentation:
When circulating prior to cementing initial pressure was 79 bar / . . .

Karina Helle / Morten Laget


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DNO
1218 – DNO

Borgland Dolphin Drilling
Experience Transfer Meeting
Operational A-1 H, A-2 H, A-3 HT2
Oselvar
Production section 24/03/2012 DONG handover documentation: The Odfjell CRTi (Casing Running Tool internal) was used to fill casing . . .

If using CRTi as a contingenct again is should be used together with auto filling shoe, this way . . .
Karina Helle / Morten Laget


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DNO
1216 – DNO

Borgland Dolphin Drilling
Experience Transfer Meeting
Operational A-1 H, A-2 H, A-3 HT2
Oselvar
Production section 11/03/2012 DONG handover documentation: While running the 13 3/8″ casing, the casing tong was not lowered all . . .

Karina Helle / Morten Laget


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DNO
1215 – DNO

Borgland Dolphin Drilling
Experience Transfer Meeting
Operational A-1 H, A-2 H, A-3 HT2
Oselvar
Reservoir section 10/03/2012 DONG handover documentation: All joints for the 13 3/8″ casing came out with DL connections . . .

Karina Helle / Morten Laget


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