No user selected
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Report No.
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276 |
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Discipline/Origin
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Drilling |
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Well
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Rungne |
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Date created
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2019/09/30 |
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Project Phase
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Operational |
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LL Type/Classification
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Operational |
Transocean Arctic
Negative Operational LL with Faroe
Rungne (30/6-30) – Intermediate section
What happened:
The overpull margin was down to only 26 mt at the end, while running the heavy and long 9 5/8″ casing. Theoretical weight of the 9 5/8″ casing was 239 mt and the landing string was 5 mt totaling to 244 mt. Max allowed pull on 5 1/2″DP at surface was 281 mt (80 % of yield strength, premium pipe). Just before landing 290 mt hookload was experienced (i.e. 46 mt drag). Subtracting 35 mt of block weight this leaves 255 mt on DP at surface. 281-255=26 mt overpull margin.
What was planned:
Running 9 5/8″ casing
What was learned:
NA
What actions are required:
Suggest using 5 1/2″ HWDP landing string on future wells with similar length 9 5/8″ casing.
Transocean Arctic
What happened in Intermediate section:
The overpull margin was down to only 26 mt at the end, while running the heavy and long 9 5/8″ casing. Theoretical weight of the 9 5/8″ casing was 239 mt and the landing string was 5 mt totaling to 244 mt. Max allowed pull on 5 1/2″DP at surface was 281 mt (80 % of yield strength, premium pipe). Just before landing 290 mt hookload was experienced (i.e. 46 mt drag). Subtracting 35 mt of block weight this leaves 255 mt on DP at surface. 281-255=26 mt overpull margin.
Running 9 5/8″ casing
NA
Suggest using 5 1/2″ HWDP landing string on future wells with similar length 9 5/8″ casing.
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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