Lessons Learned749

Operator Rig Discipline / Origin Project Phase Well Section Date What Happened
DNO 5871 – DNO Deepsea Yantai Planning 25/7-11 S
Norma
01/08/2023 Difficult to see with the ROV at seabed due to poor visibility and loose seabed conduction.
Drilling Engineer / Morten Laget
PDF Edit
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
PDF Edit
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
PDF Edit
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
PDF Edit
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
PDF Edit
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
PDF Edit
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
PDF Edit
DNO 2188 – 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
PDF Edit
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
PDF Edit
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
PDF Edit
DNO 2189 – DNO Borgland Dolphin Subsea
Own Experience
Planning A-1 H, A-2 H, A-3 HT2
Oselvar
P&A 01/10/2021 Two lubricator valves installed in the landing string.
Lars Solvang / Stig Seland
PDF Edit
DNO 2190 – 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
PDF Edit
DNO 2111 – DNO Borgland Dolphin Completion Planning A-1 H, A-2 H, A-3 HT2
Oselvar
P&A 14/09/2021 Disintegrated control line clamps and loose control lines increased the required overpull to be able . . .
Øystein Prytz / Stig Seland
PDF Edit
DNO 1531 – DNO Borgland Dolphin Logistics
Own Experience
Planning A-1 H, A-2 H, A-3 HT2
Oselvar
N/A 21/05/2021 Max PAX during operations landed on 16 PAX in even good flying conditions and personnel was bumped . . .
Johan Kjos-Hanssen / Stig Seland
PDF Edit
DNO 1434 – DNO Borgland Dolphin External Environment
NEA Q&A
Planning 2/5-15
Gomez
23/04/2021 Subunit C in PL006C not available in Brønnøysundregisteret.
Christina Sæland Rødne / Christina Sæland Rødne
PDF Edit
DNO 1433 – DNO Borgland Dolphin External Environment
NEA Q&A
Planning 2/5-15
Gomez
23/04/2021 Change in regulation §66 – contingency chemicals does not include chemicals used for lost . . .
Christina Sæland Rødne / Christina Sæland Rødne
PDF Edit
DNO 1432 – DNO Borgland Dolphin External Environment
NEA Q&A
Planning 2/5-15
Gomez
23/04/2021 Lack of justification why BO rates are lower in ST than MB, as the ST is 500 m deeper and length of . . .
Christina Sæland Rødne / Morten Laget
PDF Edit
DNO 1435 – DNO Borgland Dolphin External Environment
NEA Q&A
Planning 2/5-15
Gomez
23/04/2021 Hearing comment from Directorate of Fishery: The ERACA lacks information about fishing/fishery . . .
Christina Sæland Rødne / Christina Sæland Rødne
PDF Edit
DNO 1436 – DNO Borgland Dolphin External Environment
NEA Q&A
Planning 2/5-15
Gomez
23/04/2021 Hearing comment from Directorate of Fisheries: The ERACA/AfD lack information about sea mammals that . . .
Christina Sæland Rødne / Christina Sæland Rødne
PDF Edit
DNO 1443 – DNO Borgland Dolphin Marine
PSA Q&A
Planning 2/5-15
Gomez
N/A 16/04/2021 Hva skal gjøres for å unngå torsjon i kjettingene både under operasjon og under bruk av . . .
Karina Helle / Morten Laget
PDF Edit

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