Tubular joint with trapped mid-joint metal to metal seal

Details Tubular joint with trapped mid-joint metal to metal seal Tubular joint with trapped mid-joint metal to metal seal

F - Mech Eng,Light,Heat,Weapons

16

L

285/63

F16L 15/00 (2006.01) E21B 17/042 (2006.01) F16L 15/06 (2006.01)

Patent

CA 1229862

TUBULAR JOINT WITH TRAPPED MID-JOINT METAL TO METAL SEAL ABSTRACT A joint of male and female tubular elements is disclosed where the threads of the female and male members have negative load flanks and have two or more radial steps axially separated one from another by a reverse angle torque shoulder having one or two adja- cent conical sealing surfaces. The conical sealing surfaces develop radial positional interference and the reverse angle torque shoulder serves as a positive as- sembly stop. The negative load flank angle of the threads and the reverse torque shoulder angle combine to interlock the male and female members and to pre- vent differential radial separation of the engaged conical sealing surfaces when the joint is exposed to internal pressure, external pressure or both. Tapered threads and sealing surfaces and interference threads may advantageously be used in the joint construction.

445365

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