Riserless single trip hanger and packoff running tool

摘要

A running tool for landing a tubular hanger in a subsea wellhead housing or the like, installing an annulus seal assembly into a sealing annulus between the tubular hanger and the wellhead housing, and then pressure testing the seal assembly. The running tool includes an inner mandrel which comprises an upper end that is connectable to a running string, a generally cylindrical inner body which is movably connected to the inner mandrel and releasably connectable to the tubular hanger, a generally cylindrical lower body which is positioned around the inner body above the tubular hanger and connectable to the seal assembly, a generally cylindrical upper body which is positioned above the lower body and is connected to the inner body, an outer mandrel which is slidably supported on the upper body and is connected to the lower body, and a first pressure chamber.

主权项

1. A running tool for landing a tubular hanger in a subsea wellhead housing or the like, installing an annulus seal assembly into a sealing annulus between the tubular hanger and the wellhead housing, and then pressure testing the seal assembly, the running tool comprising:
an inner mandrel which comprises an upper end that is connectable to a running string; a generally cylindrical inner body which is movably connected to the inner mandrel, the tubular hanger being releasably connectable to the inner body; a generally cylindrical lower body which is positioned around the inner body above the tubular hanger, the seal assembly being releasably connectable to the lower body; a generally cylindrical upper body which is positioned above the lower body and is connected to the inner body; an outer mandrel which is slidably supported on the upper body and is connected to the lower body; and a first pressure chamber which is defined between the outer mandrel and the upper body; wherein after the tubular hanger is landed in the wellhead housing, pressure is applied to the first pressure chamber to thereby force the outer mandrel and the lower body axially downward and move the seal assembly into the sealing annulus; and wherein after the seal assembly is moved into the sealing annulus, pressure is applied to a second pressure chamber defined between the seal assembly, the wellhead housing, the inner body and the upper body to test the sealing ability of the seal assembly.