Abstract: A pressure control device for sealing a conduit comprises a seal element comprising an elastomer, the seal element defining a seal element external surface portion, the seal element external surface portion defining an external perimeter. The external perimeter is adapted to increase as an environmental temperature increases, such that, in use, an increase in the environmental temperature can move the seal element external surface portion into engagement with the conduit or, once engaged with the conduit or if already engaged with the conduit, can create an improved seal with the conduit.

Abstract: The present invention provides a pressure control device (10) suitable to be mounted on a rigid mandrel or the like and to form a seal in an oilwell, for example, in order to deploy a zonal control system. The pressure control device comprises a flexible sealing element (18), a first support member (30, 32) and a second support member (34, 36). One of the support members (34, 36) comprises a composite material.

Abstract: An annular seal (12) is operable to seal an annular gap (140) between a first member (120) and a second member (130). The seal (12) is configured to be received in a recess (20) in the first member (120) and to close/seal the annular gap (140). The seal (12) comprises a substantially solid body (13) comprising a first surface (24), which in use abuts the recess (20) in the first member (120) and a second surface (26), which in use faces/abuts the second member (130). The first surface (24) comprises, a width wise concave section (32) across at least part of the width of the seal (12).

Abstract: A pressure control device for sealing a conduit is described. The pressure control device comprises a seal element comprising an elastomer, the seal element defining a seal element external surface portion, the seal element external surface portion defining an external perimeter. The external perimeter is adapted to increase as an environmental temperature increases, such that, in use, an increase in the environmental temperature can move the seal element external surface portion into engagement with the conduit or, once engaged with the conduit or if already engaged with the conduit, can create an improved seal with the conduit.