Patent ID: 6138762
Filing Date: 2000-10-31
Classification: E21B

Abstract:
A wellhead assembly comprising:a tubular upper body having an axis and a downward facing shoulder;a tubular wellhead member having an upward facing rim for complementary engagement with said downward facing shoulder;a radially movable locking member carried by said upper body for engaging an external grooved profile on said wellhead member for locking said upper body to said wellhead member for preloading said shoulder and rim into engagement with each other;a lower body carried by the upper body and surrounding an upper portion of said wellhead member, the locking member being carried by said lower body, said lower body having a tapered lower shoulder axially spaced below said locking member; anda tapered raised profile axially spaced below said grooved profile on said wellhead member which is engaged by said tapered lower shoulder.