Abstract: A pipe hanger for supporting and sealing a tubular conduit in a producing well. The initial application of the tubular conduit weight to the hanger automatically actuates the seal and both sets of pipe gripping members. The upper set of pipe gripping slips initiates support of the tubular conduit and actuation of the seal and lower pipe gripping members. The lower pipe gripping members are moved radially inwardly by deformation of a resilient annular ring that is then contained within an enclosed chamber to prevent inadvertent release of the lower pipe gripping members.

Abstract: An annular seal assembly adopted for use in wellheads to seal between a well conduit and a wellhead. The seal ring for sealing between the outer surface of the well conduit and the inner surface of the wellhead is positioned between a lower support ring and an upper follower ring. The upper follower ring controls deformation of the seal ring by distributing the longitudinal forces to uniformly deform the seal ring. A pair of actuating rings are disposed adjacent the follower ring to provide the longitudinal force on urging to the follower by converting relative rotational movement therebetween to longitudinal movement or expansion between said actuating rings. Such longitudinal movement is confined to produce the longitudinal urging to deform the seal. Engaged cam on the actuating rings produce increased longitudinal movement in response to a holddown screw enlarging a gapped opening formed in the actuating rings.