String reciprocation during cement job
Hi folksAt a recent DWOP that we facilitated, one of the break-out groups was tasked with getting into the details of casing running & cementation.
They recommended pipe movement during cementation to improve the likelihood of getting a good cement bond. Not just rotation, but reciprocation.
My paradigm (mind-set) from years offshore is that reciprocation could lead to regret if unable to get back down to 'bottom' on the down-stroke. This would result in failing to land the mandrel hanger in the unitised wellhead.
However, this is a land-rig with a 'A', 'B' and 'C' sections; casing will be cut and slip-type hanger installed.
What are other well teams doing? Are you reciprocating your casing during cementation and, if so:
- Have you been able to determine improvements in cement bond quality?
- What casing accessories (centralisers) do you use ?
- What precautions do you take?
- What problems (and lessons learnt) do you have ?
- What recommendations would you make (best practice?
Dave
2 Answer(s)
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