No user selected
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Report No.
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256 |
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Discipline/Origin
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Drilling |
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Well
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Songesand |
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Date created
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2020/06/16 |
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Project Phase
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Operational |
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LL Type/Classification
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Cement |
Transocean Arctic
Negative Cement LL with Wellesley
Songesand (35/4-2) – Production section
What happened:
The cement slurry for the 9 5/8″ casing was thick/sticky and caused cement pump suction problems which led to completely wrong volume measurement of pump strokes. An unexpected Cement Unit pressure peak of 134 bar was observed after 18.5 m3 of slurry was pumped. Suspected to be the top wiper plug shearing way too early by accident. Pumping was stopped and the event discussed. Cement slurry mixing was re-started after 5 minutes.
What was planned:
Cement 9 5/8″ casing
What was learned:
Thought to be due to the cement type and heavier cement density than normal. The inaccurate volume control of cement slurry caused confusion during cmt job. The pressure peak was probably due to the bottom wiper plug burst in the landing collar. This event should have happened after 13 m3 slurry pumped and is not normally seen.
What actions are required:
Halliburton should resolve this issue for future jobs.
Transocean Arctic
What happened in Production section:
The cement slurry for the 9 5/8″ casing was thick/sticky and caused cement pump suction problems which led to completely wrong volume measurement of pump strokes. An unexpected Cement Unit pressure peak of 134 bar was observed after 18.5 m3 of slurry was pumped. Suspected to be the top wiper plug shearing way too early by accident. Pumping was stopped and the event discussed. Cement slurry mixing was re-started after 5 minutes.
Cement 9 5/8″ casing
Thought to be due to the cement type and heavier cement density than normal. The inaccurate volume control of cement slurry caused confusion during cmt job. The pressure peak was probably due to the bottom wiper plug burst in the landing collar. This event should have happened after 13 m3 slurry pumped and is not normally seen.
Halliburton should resolve this issue for future jobs.
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
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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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