WELLHEAD PIPE COUPLING

摘要

A wellhead coupling and method for coupling and sealing an annulus formed between overlapping ends of an outer pipe and an inner pipe. A clamp housing grips the inner pipe, forms a horizontal landing base for the outer pipe, and forms circumferential ports aligned with the annulus. A seal ring and upper metal ring are located in the annulus, the seal ring being formed with ports to align with the ports of the clamp housing, and the upper metal ring being formed with threaded holes to align with the ports of the seal ring and the clamp housing. Threaded seal engaging members extend through the aligned ports of the clamp housing and the seal ring for threaded connection in the threaded holes of the upper metal ring. A seal energizing member located within or below the clamp housing pulls downwardly on the threaded seal engaging members to energize the seal ring into sealing relationship in the annulus.