WE Report

Lessons Learned

Lesson Learned





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Report No.

338

Discipline/Origin

Drilling
No origin

Well

Shrek
6507/5-9 S, 6507/5-9 A

Date created

2019/10/21
2238 days ago

Project Phase

Operational
Project Phase

LL Type/Classification

Operational
Negative

Deepsea Nordkapp


What happened in Top hole:
Slow ROP with 36″ x 42″ BHA, due to keeping neutral point below seabed, it limited the drilling parameters we could use.
Staged up parameters to reach TD in most efficient way.

What Was Planned

Drilling 36″x42″ hole with 36″ bit and hole opener.

What Was Learned

42″ HO placement relative to the 36″ bit and keeping neutral point below seabed has the potential to cause adverse effects to the ROP

What Actions Are Required

Evaluate to install a mud motor to hydraulically rotate 36″ bit and have 42″ HO higher in BHA. This will allow for more power at the bit and would only need to rotate once the 42″ HO is nearing the mudline.

EDITOR


CLOSE LL (testing)





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