Patent ID: 9200501
Filing Date: 2015-12-01
Classification: E21B,F16K,Y10T

Abstract:
1. A valve assembly comprising: a conduit having a throughbore and defining a longitudinal axis; at least one valve seat provided in the throughbore of the conduit; a sealing member that is moveable relative to the at least one valve seat between an open configuration in which the throughbore of the conduit is open and a sealing configuration in which the sealing member is arranged to substantially obturate the throughbore of the conduit; wherein in the sealing configuration, the sealing member seals against the at least one valve seat to seal the throughbore along a sealing line at least a part of which is elliptical and angled at a non-zero angle relative to a direction perpendicular to the longitudinal axis of the throughbore; wherein the sealing member is both pivotally and axially movable relative to the at least one valve seat between the open configuration and the sealing configuration; and wherein the valve assembly includes a sealing mechanism which is selectively actuable to move the sealing member independent of fluid flow, both axially and pivotally relative to the at least valve seat between the open configuration and the sealing configuration.