Patent ID: 8276671

Claim:
A running tool for setting and sealing a well pipe hanger in a wellhead member, the running tool comprising: an elongated stem having an axial passage; an inner body substantially surrounding and connected to the stem such that rotation of the stem causes the stem to translate axially relative to the inner body; a piston connected to the stem such that the piston and the stem rotate and translate in unison, the piston substantially surrounding portions of the stem and the inner body, the piston having a setting sleeve; a packoff mounted to the setting sleeve of the piston; a piston engagement element carried by the inner body and adapted to be engaged the setting sleeve to limit downward movement of the packoff at an intermediate location of the packoff and stem and to prevent axial movement of the stem and the piston relative to the inner body when setting and testing the well pipe hanger; and a seal carried by the running tool that engages an inner diameter surface of the wellhead member enabling hydraulic fluid pressure to be applied to the piston so as to set the well pipe hanger and move the piston and the packoff from the intermediate position to a set position.