Packoff for liner deployment assembly

摘要

PACKOFF FOR LINER DEPLOYMENT ASSEMBLY A packoff for hanging a liner string (15) from a tubular string cemented in a wellbore (24) includes: a tubular body (63) having an outer groove and an inner groove; an inner seal assembly disposed in the inner groove; an outer seal assembly disposed in the outer groove; a cap (62) connected to an upper end of the body (63) for retaining the seal assemblies; a plurality dogs (66) disposed in respective openings formed through a wall of the body (63); and a lock sleeve (67). The lock sleeve (67) is: disposed in the body (63), longitudinally movable relative to the body (63), and has a cam profile formed in an outer surface thereof for extending the dogs (66). 55 62 4/8 64 69u 63 C5g ___ ___ __ __7__655 63s 63p 65s 67 65o 67t 15p 67f 69b