Thermal liner top anchor packer

Abstract

A liner top anchor packer apparatus include (a) an inner tubular slick joint connected to a top sub and slidably disposed within a cylindrical mandrel, the inner tubular slick joint and the mandrel connected together with at least one shear pin; and (b) a slip assembly disposed on the mandrel, and comprising a slip setting sleeve and at least one slip moveable between a running position and an actuated outward position.

1 . A liner top anchor packer apparatus comprising:
 (a) an inner tubular slick joint connected to a top sub and slidably disposed within a cylindrical mandrel, the inner tubular slick joint and the mandrel connected together with at least one shear pin; and   (b) a slip assembly disposed on the mandrel, and comprising a slip setting sleeve and at least one slip moveable between a running position and an actuated outward position.   
     
     
         2 . The apparatus of  claim 1  wherein the slip assembly comprises:
 (a) an upper cone slidably disposed on the mandrel, and affixed to the mandrel with at least one shear screw in a running position and moveable to a slip actuating position; and 
 (b) a lower cone affixed to the mandrel. 
 
       wherein the slips are actuated outwards between the upper cone and the lower cone when the upper cone moves to a slip actuating position by action of the slip setting sleeve. 
     
     
         3 . The apparatus of  claim 2  wherein the lower cone is affixed to the mandrel by at least one shear screw, which is stronger than the at least one shear screw affixing the mandrel to inner tubular slick joint. 
     
     
         4 . The apparatus of  claim 1  further comprising a packer element concentrically disposed around the mandrel and an actuating assembly for deforming the packer element outwards. 
     
     
         5 . The apparatus of  claim 4  wherein the packer element actuating assembly comprises the following elements disposed concentrically around the mandrel:
 (a) an upper setting sleeve affixed to the mandrel in a running position by shear screws and moveable to an actuating position; 
 (b) a lock housing assembly moveable between a running position and an actuating position, comprising:
 i. an upper lock housing having collet fingers retained within a radial groove formed on an outer surface of the mandrel by an inner surface of the upper setting sleeve, wherein the inner surface of the upper setting sleeve defines a radial groove for releasing the collet fingers of the upper lock housing when in the actuating position; and 
 ii. a lower lock housing interlocked with the upper lock housing to move in unison, the lower lock housing having a split ring lock with ratchet teeth for engaging ratchet teeth on an outer surface of the mandrel to permit downward movement of the lower lock housing on the mandrel, but not upward movement, the lower lock housing connected to the split ring lock by shear screws; and 
 
 (c) a lower setting sleeve; 
 
       wherein the lock housing assembly bears on the lower setting sleeve when in its actuating position to axially compress the packer element between the lower setting sleeve and the upper cone.