Patent ID: 8602458

Claim:
A pipe coupling comprising: an outer pipe having a lower end and an inner pipe having an upper end such that the lower end of the outer pipe is overlapping with the upper end of the inner pipe to form an annulus between the overlapping ends, and the lower end of the outer pipe being vertically axially aligned over the upper end of the inner pipe; a housing having a cylindrical bore and adapted to be attached in gripping relationship to an outer surface of the inner pipe to form a horizontal landing base for the overlapping lower end of the outer pipe; a seal assembly adapted to be positioned in the annulus formed between the overlapping ends of the outer and inner pipe, the seal assembly including an upper metal ring adapted to be positioned in the annulus, and a seal ring adapted to be positioned in the annulus between the upper metal ring and the housing; threaded seal engaging members adapted to be connected between the housing and the upper ring; and a seal energizing member adapted to be engaged with each of the threaded seal engaging members from below the housing and to pull downwardly on the threaded seal engaging members to energize the seal ring into sealing relationship in the annulus.