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Posted on: 12 Aug 2009, 07:30 AM Last reply on:13 Aug 2009, 10:23 AMNo. of responses: 4
Folks,

Looking to see if anyone has any experience good or bad in milling previously cemented liner hanger systems. On an upcoming slot recovery job there are concerns about Whipstocking above the liner lap because of a potentially low fracture gradient and cutting and pulling the previous casing string would require redrilling of a potentially problematic section. Milling the liner hanger (and liner lap) would allow reuse of the existing 9 5/8" shoe which is set in a highly competent formation.

System in question is a Baker UNIFLEX 7" rotating liner hanger system set in 9 5/8" casing. The fishing companies are unable to provide an example of a cemented liner hanger being milled.

All positive or negative experiences regarding milling of cemented liner hangers would be much appreciated.

Many Thanks

Calum MacDonald
Addax
Calum MacDonald
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