Patent ID: 9453393
Filing Date: 2016-09-27
CPC Classification: E21B

Claim Text:
1. An apparatus for setting a liner in a wellbore, the wellbore containing a casing string partially disposed therein, the apparatus attached to a work string placed in the wellbore, the apparatus comprising: a setting tool attached to the work string, said setting tool having attached thereto a stretching mandrel containing a plurality of helical wedge profiles on an outer surface of said stretching mandrel; a liner top releasably attached to the setting tool, said liner top containing a plurality of banded elastomer sheaths positioned on an outer portion of said liner top, and wherein said stretching mandrel is concentrically placed within said liner top; a screw shaft operatively attached to said setting tool, the screw shaft configured to generate an axial movement of said stretching mandrel so that a rotational movement imparted to said work string causes a forward, rotational movement of said stretching mandrel so that said helical wedge profiles form helical protuberances on an inner portion of said top liner and helical grooves are formed on the outer portion of said liner top which sealingly engages with an inner surface of the casing string, wherein said elastomer sheaths flow into said helical grooves and engage with the inner surface of the casing string; a power generating means operatively attached to said screw shaft, the power generating means configured for powering axial movement to said stretching mandrel along said screw shaft during rotational movement, wherein said power generating means includes a planetary roller gear assembly operatively associated with said stretching mandrel.