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Pre-making BHA's Onshore
04 August 2005
An operator encountered a problem with pre-making BHAs onshore. A
damaged connection (split in the box) was noted by a directional
driller who was checking a spud assembly. It would seem that a heavy
item had been placed on top of the assembly, which had flexed and
led to the damage.
2 answer(s)
Drilling Services Consultant
Clyde Drilling
Total Posts: 10
Join Date: 05/11/14
We used pre made up lower BHAS for some years successfully. They were transported for about 600 miles to port before shipping to rig. We never had a BHA problem as long as procedures were followed.
Odfjell Drilling (Norway)
Total Posts: 7
Join Date: 28/07/06
Premade BHA assemblies should be delivered with Torque certs and
sealed tape on connection.

Posted by

Dave Taylor - SPREAD Moderator

Managing Director (

Relentless Pursuit Of Perfection Ltd.

Total Posts: 416
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