By: Stian Engvik
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Report No.
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1361 |
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Discipline/Origin
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Marine |
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Well
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Oselvar |
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Date created
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2021/03/08 |
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Project Phase
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Operational |
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LL Type/Classification
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Operational |
Borgland Dolphin
N/A Operational LL with DNO
Oselvar (A-1 H, A-2 H, A-3 HT2) – Prelay
What happened:
By using 41deg fluke angles the anchors would not hold the required test tension
What was planned:
During prelay of anchors at Oselvar, fluke angles on the anchors was set to 41deg based on mooring analysis an interpretation of CPT data.
What was learned:
After several failures to install anchors with 41deg fluke angle, descition was made to change fluke angle to 32deg. This was very succesfull and all anchors was easily installed
What actions are required:
For Gomez which is close to Oselvar and is expected to have the same soil condition, fluke angles will be set to 32deg prior to mobilisation and installation offshore.
Borgland Dolphin
What happened in Prelay:
By using 41deg fluke angles the anchors would not hold the required test tension
During prelay of anchors at Oselvar, fluke angles on the anchors was set to 41deg based on mooring analysis an interpretation of CPT data.
After several failures to install anchors with 41deg fluke angle, descition was made to change fluke angle to 32deg. This was very succesfull and all anchors was easily installed
For Gomez which is close to Oselvar and is expected to have the same soil condition, fluke angles will be set to 32deg prior to mobilisation and installation offshore.
EDITOR
CLOSE LL (testing)
New Lesson Learned
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- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- RIG
Borgland Dolphin- Island Innovator
- Well
Oselvar- Gomez
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- RIG
- Island Innovator
- Well
- Gråspett
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- RIG
- Deepsea Bergen
- WELL
- Brasse
- Rungne
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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NO LLs for INEOS- RIG
- Borgland Dolphin
- WELL
- Fat Canyon
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- RIG
- Deepsea Yantai
- Well
- Shrek
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
-
- PROJECT PHASE
- Operational
- Planning
- Reporting
- CLASSIFICATION
- Positive
- Negative
- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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- Time Estimate<\/a><\/li>\n\t\t\t\t\t\t\t\t
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