New expandable-profile liners used in Iran, China, Tatarstan

Gabdrashit S. AbdrakhmanovNigamatyan Kh. KhamityanovNail N. VildanovTatNIPIneft, Tatar State Research &Design Institute, Tatneft JSCBugulma, RussiaTatneft has developed guidelines for running expandable-profile liners in wells with complex geology, based on operations in Iran, China, and Tatarstan.Since the early 1980s, expandable casing strings developed by Tatneft engineers have been extensively used for isolation of trouble zones.1-8Different expandable systems, known as expandable-profile liners, have been developed and tested and have continued to improve. Tatneft has addressed a number of issues with expandable-profile liners: the applicability and enhanced reliability of liners...

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