WE Report

Lessons Learned

Lessons Learned865


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

DNO
8480 – DNO

Deepsea Yantai Drilling Operational 35/10-13
Kjøttkake
Intermediate section 24/03/2025 Commander 1000 is a very heavy CMT-head. Due to its weight, it is not preferable to use on DSY . . .

Sander Schaathun / Stig Seland


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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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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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