WE Report

Lessons Learned

Lessons Learned865

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

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
5867 – DNO

 		Deepsea Yantai Subsurface
Own Experience		 Operational 25/7-11 S
Norma		 Surface section 30/07/2023 New version of the Gravitas earlier used. The WSG not used to the new version.

Drilling Engineer / Morten Laget


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DNO
5868 – DNO

 		Deepsea Yantai Drilling
Own Experience		 Operational 25/7-11 S
Norma		 Surface section 30/07/2023
The drill commenced with the Driller pressuring up the well with 30 bar.
The classic method of . . .

Drilling Engineer / Morten Laget


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DNO
5869 – DNO

 		Deepsea Yantai Drilling
Own Experience		 Operational 25/7-11 S
Norma		 Surface section 30/07/2023 From the start of the section after the FIT, delivery of cuttings to the ISO tanks using the CCBs . . .

Drilling Engineer / Morten Laget


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DNO
5111 – DNO

 		No Rig Marine
PSA Q&A		 Planning No well Other 28/03/2023

Er bruk av PosmoorATA innenfor begrensingene gitt i appendiks til klassesertifikatet for Deepsea . . .

Karina Helle / Morten Laget



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DNO
5097 – DNO

 		Deepsea Yantai Multi Discipline
Own Experience
INTERNAL		 Planning 25/7-11 S Other 22/03/2023 Drilling Engineers have been using online software called The Engineering ToolBox. This software . . .

Stian Engvik / Morten Laget


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DNO
4761 – DNO

 		No Rig Drilling
Own Experience		 Planning No well N/A 10/08/2022 In DG1-DG2 rig screening strategy the project landed on 1.5 or Dual derrick rig and all time and . . .

Zol Mollaeian / Sigve K. Næsheim


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DNO
2209 – DNO

 		Borgland Dolphin External Environment
Own Experience		 Planning 2/5-15
Gomez		 P&A 06/10/2021 Due to potential WoW it was considered to leave the well and for DNO to join Oceaneering WH cutting . . .

Christina Sæland Rødne / Christina Sæland Rødne



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DNO
2194 – DNO

 		Borgland Dolphin Wireline / Slickline
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 04/10/2021 Due to the missing clamps the control lines was coiled up around the tubing and made it impossible . . .

Lars Solvang / Stig Seland



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DNO
2196 – DNO

 		Borgland Dolphin Logistics 2/5-15
Gomez		 04/10/2021 Backloaded with lack of information. Sent to wrong vendor/handled wrong. The casing was mistakenly . . .

Martin Vikse / Morten Laget


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DNO
2197 – DNO

 		Borgland Dolphin Wireline / Slickline
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 04/10/2021 Deep set plug failed during pressure test.

Lars Solvang / Stig Seland


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DNO
2198 – DNO

 		Borgland Dolphin Drilling
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 04/10/2021 H2S had formed in the annulus fluid.

Lars Solvang / Stig Seland



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DNO
2199 – DNO

 		Borgland Dolphin Bleed of package
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 04/10/2021 Hydrocarbons contamination required a bleed off package to be installed.

Lars Solvang / Stig Seland



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DNO
2200 – DNO

 		Borgland Dolphin Bleed of package
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 04/10/2021 The wireline plug failed and a backup had to be run.

Lars Solvang / Stig Seland



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DNO
2201 – DNO

 		Borgland Dolphin Completion
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 04/10/2021 Clamps holding the control lines (polyoil clamps) had disintegrated.

Lars Solvang / Stig Seland



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DNO
2202 – DNO

 		Borgland Dolphin Completion
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 04/10/2021 Clamps holding the control lines (polyoil clamps) had disintegrated. Tubing had to be cut after it . . .

Lars Solvang / Stig Seland



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DNO
2203 – DNO

 		Borgland Dolphin Subsea
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 04/10/2021
The point load on the boat deck was higher than allowed and 4 x 1m2 steal plates was needed under . . .

Lars Solvang / Stig Seland



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DNO
2172 – DNO

 		Borgland Dolphin Subsea
Own Experience		 Planning A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 01/10/2021 As planned

Lars Solvang / Stig Seland



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DNO
2173 – DNO

 		Borgland Dolphin Subsea
Own Experience		 Planning A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 01/10/2021 Weight of the black eagle hose will make alignment to the manifold flushing cap difficult.

Lars Solvang / Stig Seland



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DNO
2174 – DNO

 		Borgland Dolphin Subsea
Own Experience		 Operational A-1 H, A-2 H, A-3 HT2
Oselvar		 P&A 01/10/2021 Extraction stopped as the hub was secured with wire bracing. These had to be cut before operation . . .

Lars Solvang / Stig Seland



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