By: Drilling Supervisor
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Report No.
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2300 |
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Discipline/Origin
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Drilling |
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Well
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Fat Canyon |
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Date created
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2021/11/09 |
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Project Phase
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Planning |
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LL Type/Classification
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Planning |
Borgland Dolphin
Negative Planning LL with INEOS
Fat Canyon (6306/3-1 S) – Intermediate section
What happened:
Initial planned centralizer program of using 1 centralizer every other joint above shoetrack to top of cmt interval (300 m) was changed. Changed to 1 centralizer per joint for all joints between shoe track and top of cmt interval (300 m).
9 5/8″ casing got stuck. Had 40 MT drag in OH (195 MT up, 155 MT down). This is a lot in a short section with only 25-30 deg inc.
What was planned:
Cement 9 5/8″ casing with centralizers to facilitate good bond and zone izolation
What was learned:
We were using “twice as many” centralizers on a 9 5/8″ casing job as “other” operators use. They usually dont follow the recommendation from cmt company, as they only see a small part of the risk picture, namely their own cmt operations. Friction in OH, chance of getting junk in hole, etc. must also be considered.
What actions are required:
Be more critical and reduce number of centralizers on future wells.
Borgland Dolphin
What happened in Intermediate section:
Initial planned centralizer program of using 1 centralizer every other joint above shoetrack to top of cmt interval (300 m) was changed. Changed to 1 centralizer per joint for all joints between shoe track and top of cmt interval (300 m).
9 5/8″ casing got stuck. Had 40 MT drag in OH (195 MT up, 155 MT down). This is a lot in a short section with only 25-30 deg inc.
9 5/8″ casing got stuck. Had 40 MT drag in OH (195 MT up, 155 MT down). This is a lot in a short section with only 25-30 deg inc.
Cement 9 5/8″ casing with centralizers to facilitate good bond and zone izolation
We were using “twice as many” centralizers on a 9 5/8″ casing job as “other” operators use. They usually dont follow the recommendation from cmt company, as they only see a small part of the risk picture, namely their own cmt operations. Friction in OH, chance of getting junk in hole, etc. must also be considered.
Be more critical and reduce number of centralizers on future wells.
EDITOR
CLOSE LL (testing)
[136 show=”value”]in 6306/3-1 S
Comments
The stuck casing mechanism cant be 100% determined, but extra friction from unnecessary many centralizers dont help in tight hole with sticky clay. It will help to prevent differential sticking, but we did not have that issue in this well. There were no permeable zones in the OH.
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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