EXPANDABLE-PROFILE LINERS IN WELL CONSTRUCTION-1: Liners extend casing length without wellbore diameter loss

08/12/2002
Expandable-profile liners have stabilized problem wellbores throughout Russia, solving lost circulation and wellbore stability problems, regardless of severity or the size of wellbore washouts.Oil companies have installed more than 1,000 of these expandable-profile liners as an alternative to running intermediate casing strings.Tatar Oil Research & Design Institute (TatNIPIneft) has advanced this technology to extend casing strings with profile liners, without loss of wellbore diameter, to solve lost-circulation control issues that are complicated by drag and sticking of the drillstring bottom-hole assembly (BHA).Attempts to run casing strings to the required depth sometimes fail during w...
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