WE Report

Lessons Learned

Lessons Learned865


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

DNO
8207 – DNO

Deepsea Yantai Marine 35/10-13
Kjøttkake
08/02/2025 Monkey fist not attached to wellhead running tool prior to rigging up. Had to wait for ROV to make . . .

Drilling Engineer


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PGNiG
6747 – PGNiG

Deepsea Yantai Marine
Own Experience
Operational 6501/10-1
Tomcat
Pre-Lay 15/09/2024
We started on anchor 4. This anchor was together with anchor 5 and 6 supposed to be installed to . . .

Stian Engvik / Stig Seland


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Wellesley
5936 – Wellesley

Deepsea Yantai Marine
Own Experience
Operational 35/10-10S
Carmen
CAN-Ductor 23/10/2023 Risk of WOW during Carmen CAN-Ductor installation and recovery leading to Wellesley being . . .

Stian Engvik / 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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PGNiG
4842 – PGNiG

Deepsea Yantai Marine
Own Experience
Operational 6608/1-1 S
Copernicus
Rig move 09/09/2022 Marine reps identified possibility to start transit 2hrs before de-ballasting was completed. This . . .

Stian Engvik / Morten Laget


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PGNiG
4843 – PGNiG

Deepsea Yantai Marine
Own Experience
Operational 6608/1-1 S
Copernicus
Rig move 09/09/2022 Bridge and marine reps was not informed from DSV or DE when required spud equipment was taken . . .

Stian Engvik / Morten Laget


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PGNiG
4844 – PGNiG

Deepsea Yantai Marine
Own Experience
Operational 6608/1-1 S
Copernicus
Top hole 09/09/2022
Everything went according to plan and logging was done remotely. Final position report was delivered . . .

Stian Engvik / Morten Laget


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PGNiG
4830 – PGNiG

Deepsea Yantai Marine
Own Experience
Operational 6608/1-1 S
Copernicus
Rig move 29/08/2022 All tubulars were backloaded from the rig and mud and bulk tanks emptied. The rig was deballasted to . . .

Phil Hardy / Morten Laget


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PGNiG
4823 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

The question of how the operator (PGNiG) ensures that the site-specific
criteria set for . . .

Sanne Risbakk / Morten Laget



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PGNiG
4824 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

How are the weather conditions monitored ?​

Sanne Risbakk / Morten Laget



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PGNiG
4825 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

It is sometimes run with reduced power from auxiliary engines for operation of the DP to save fuel. . . .

Sanne Risbakk / Morten Laget



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PGNiG
4826 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

Is there a permanent or site-specific approval from DNV with regard to waves in deck for survival . . .

Sanne Risbakk / Morten Laget



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PGNiG
4827 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

At which combinations of significant wave height and period should one, according to the operation . . .

Sanne Risbakk / Morten Laget



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PGNiG
4828 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 Other 25/08/2022

How is the wave height measured at the location?​

Sanne Risbakk / Morten Laget



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PGNiG
4829 – PGNiG

Deepsea Yantai Marine
PSA Q&A
Planning 6608/1-1 S
Copernicus
Other 25/08/2022

Are there site-specific measurements of waves that make you know when to change draft?

Sanne Risbakk / Morten Laget



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PGNiG
4763 – PGNiG

Deepsea Yantai Marine
Own Experience
Planning Copernicus Rig move 23/08/2022 Mooring analysis was requested at an early stage of the planning fase, but was not taken into . . .

Stian Engvik / Morten Laget


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Wellesley
3373 – Wellesley

Borgland Dolphin Marine
Own Experience
Operational 36/1-4
Hemispheres
Rig move 18/02/2022 Uncontrolled runout of anchor and chain

Stian Engvik / Morten Laget



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DNO
1440 – DNO

Borgland Dolphin Marine
PSA Q&A
Planning 2/5-15
Gomez
N/A 16/04/2021

Hva gjøres for å unngå dannelse av martensitt i overflatene på ankerkjettingene?

Karina Helle / Morten Laget


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DNO
1441 – DNO

Borgland Dolphin Marine
PSA Q&A
Planning 2/5-15
Gomez
Other 16/04/2021

Vi ber om en bekreftelse på at vanndypet er innenfor begrensningen i sertifikatene

Karina Helle / Morten Laget


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DNO
1442 – DNO

Borgland Dolphin Marine
PSA Q&A
Planning 2/5-15
Gomez
N/A 16/04/2021

Vi ber om en bekreftelse på at dere for operasjonsdypgangen har beregnet forankringen for de . . .

Karina Helle / Morten Laget


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