Patent ID: 7654316
Filing Date: 2010-02-02
Classification: E21B,Y10T

Abstract:
1. A drilling liner system comprising a running tool having a substantially cylindrical first body and a first bore therethrough, the first body having an end adapted for connection to a drill string, and a setting sleeve having a substantially cylindrical second body and a second bore therethrough, the second body having an end adapted for connection to a liner, wherein the running tool and the setting sleeve couple via a detachable coupling comprising a first substantially tubular member having a bore therethrough, a first screw thread around an outer surface thereof, one or more raised portions arranged circumferentially on the outer surface, the raised portions defining a first face surrounding the first substantially tubular member and substantially perpendicular to the outer surface, the first face being directed toward the first screw thread, the first face having a plurality of first projections, each first projection having a first substantially straight portion arranged parallel to the bore of the first substantially tubular member and a first sloping portion, joining an apex of the first projection to a base of an adjacent projection: and a second tubular member having a bore therethrough, a second screw thread around an inner surface thereof, one or more raised portions arranged circumferentially on an outer surface thereof, the raised portions defining a second face surrounding the second tubular member and substantially perpendicular to the outer surface of the second tubular member, the second face being at an end of the second tubular member, the second face having a plurality of second projections, each second projection having a second substantially straight portion arranged parallel to the bore of the second tubular member and a second sloping portion, joining an apex of the second projection to a base of an adjacent projection; wherein the first tubular member slides within the second tubular member, the first and second screw threads mate and on partial engagement of the first and second screw threads, the first and second straight portions can meet to thereby transfer torque when a member is rotated in the direction of the first and second screw threads, wherein the running tool includes one or more first radial outlets arranged circumferentially around the first body, the setting sleeve includes one or more second radial outlets arranged circumferentially around the second body, and in a first position the first and second radial outlets are aligned and fluid can pass radially from the system.