Patent ID: 7798208
Filing Date: 2010-09-21
Classification: E21B

Abstract:
1. A wellhead assembly comprising: a first tubular having at least one aperture extending through a sidewall thereof; a second tubular having a recessed portion in the exterior thereof and arranged to be at least partially inserted within the first tubular; at least one fastening member wherein the at least one fastening member is removably accommodated within the aperture(s) and recessed portion; a securing mechanism for maintaining the fastening member(s) within the aperture(s) and recessed portion, wherein the securing mechanism is located outside of an outer end of the at least one fastening member and at least a portion of the securing mechanism is along an axis that extends through the at least one fastening member; and a seal arrangement to provide a fluid tight seal, wherein the seal arrangement comprises an annular seal ring located around the periphery of the outer end of the at least one aperture and positioned between the said at least a portion of the securing mechanism and the periphery of the outer end of the at least one aperture, wherein the annular seal ring is arranged to seal an area between the said at least a portion of the securing mechanism and the periphery of the outer end of the at least one aperture.