Fmc Corporation

Rudolf R Schoen

John C Vicic

Christopher E Cunningham

David E Cain

Steven M French

Ronald D Quates

Appavoo Thangarasu

Allan K McGregor

Jerald L Smith

Andrew C Posluszny

Robert K Stoddard

Tod Aldridge

Jim Tait

John A Fitzgerald

A wellhead seal assembly for sealing between first and second pipe members comprises an annular elastomeric body having, in cross-section, a generally rectangular shape comprising a first flat radial surface, a second flat radial surface, an inner circumferential surface and an outer circumferential surface; said inner circumferential surface comprises a generally convex portion that extends from an imaginary plane connecting the inner circumferential edge of each of said first radial surface and said second radial surface; said seal assembly further comprises at least one annular, non-metallic spring member in said elastomeric body positioned generally tangentially to the intersection of either of said radial surfaces with said inner circumferential surface.

Seals containing composite non-extrusion springs

A wellhead seal for establishing and maintaining a seal between a wellhead and inner pipe element. The seal is an annular elastomeric body having an inner axial surface with a generally convex central portion for pressing against the inner pipe element surrounded by the wellhead and an outer axial surface with a generally concave central portion which, in one embodiment, receives an annular energizing element to increase the sealing force between the body and casing. An annular anti-extrusion ring is provided at the inner edge of each radial end surface.

Wellhead seal for wide temperature and pressure ranges

Growing community of inventors

Houston, TX, United States of America

Rudolf R Schoen