Hybrid two piece packoff assembly

Abstract

A packoff assembly for sealing between an inner tubular member and an outer tubular member has a lower packoff which is configured to seal between the inner and outer tubular members, an upper packoff which is configured to seal between the inner and outer tubular members above the lower packoff, the upper packoff being releasably connected to the lower packoff and, when connected to the lower packoff, being axially movable relative to the lower packoff between a first position and a second position, a latch ring which is supported on the lower packoff, the latch ring being radially expandable into a corresponding locking groove in the outer tubular member, and a locking mandrel which is operably engaged by the upper packoff such that upon axial movement of the upper packoff from the first position to the second position, the locking mandrel expands the latch ring into the locking groove to thereby lock the upper and lower packoffs in position between the inner and outer tubular members. With the lower packoff locked in position between the inner and outer tubular members, the upper packoff can be selectively removed from the packoff assembly by disconnecting the locking mandrel from the upper packoff and disconnecting the upper packoff from the lower packoff.