Subsurface Safety Valve for High Temperature and High Pressure Wells

摘要

A subsurface safety valve particularly designed for high temperature and high pressure applications has an improved tubular joint connection that provides for a compliant metal to metal seal without adversely affecting the break out torque. The valve also includes axially extending grooves in the inner surface of the tubular housing in the area of a actuating piston bore to relief stresses in that area thereby reducing the risk of stress failure.