No user selected
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Report No.
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194 |
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Discipline/Origin
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Drilling |
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Well
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Kallåsen |
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Date created
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2019/02/05 |
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Project Phase
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Operational |
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LL Type/Classification
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Equipment |
Transocean Arctic
Negative Equipment LL with Wellesley
Kallåsen (35/12-6 S) – Surface section
What happened:
The stop ring for balloon centralizer on the inner string cmt stinger was installed on top of centralizer. This was wrong, and we were not able to get centralizer through the 18 ¾” WH. POOH and installed stop ring inside centralizer. This allow centralizer to “stretch out” and enter WH.
What was planned:
Run balloon centralizer on innerstring cement stinger
What was learned:
Centralizers on casing have stop ring above and below centralizers, but these are more rigid and of different type. For DP type “balloon centralizer”, stop ring should always be installed in middle.
What actions are required:
Always install stop ring in middle for “balloon centralizer”.
Transocean Arctic
What happened in Surface section:
The stop ring for balloon centralizer on the inner string cmt stinger was installed on top of centralizer. This was wrong, and we were not able to get centralizer through the 18 ¾” WH. POOH and installed stop ring inside centralizer. This allow centralizer to “stretch out” and enter WH.
Run balloon centralizer on innerstring cement stinger
Centralizers on casing have stop ring above and below centralizers, but these are more rigid and of different type. For DP type “balloon centralizer”, stop ring should always be installed in middle.
Always install stop ring in middle for “balloon centralizer”.
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
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- Fat Canyon
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- Norog
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- RIG
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- Origin
- Own Experience
- Experience Transfer Meeting
- NEA Q&A
- PSA Q&A
- PSA Findings
- DMF
- Norog
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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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