F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/45
F16J 15/28 (2006.01) E21B 33/04 (2006.01) F16J 15/08 (2006.01) E21B 33/00 (2006.01)
Patent
CA 1170683
-13- METAL SEAL ASSEMBLY Abstract of the Disclosure A metallic sealing ring assembly (10) for sealing an annulus be- tween metallic surfaces of concentric tubular members. The assembly com- prises a central metallic sealing ring (11) having flared upper and lower an- nular flanges (14, 15, 16, 17) at both its inner and outer peripheries. The sealing ring 11 is sandwiched between upper and lower adapter rings (12, 13) disposed concentric therewith and formed with bevelled annular edges (12a, 12b, 13a, 13b) which contact flared surfaces (14a, 15a, 16a, 17a) of the sealing ring flanges (14, 15, 16, 17) at a mating angle of five degrees. When axially compressed, the annular flanges of the metal sealing ring (11) are deflected radially and at their tips are deformed and extruded against the surfaces of the members (18, 19) defining the annulus to establish metal- to-metal seals therewith. The flanges are truncated at their free ends where- by initial engagement of the adapter rings (12, 13) with the metallic sealing ring (11) and annulus defining members (18, 19) is along the annular edges (14c - 17c, 14d - 17d) of the flange tips and the compression force is con- centrated thereat. Axial loading is applied by holddown screws (50) with tips (51) in camming engagement with a camming surface (52) on the upper adapter ring (18).
416474
Ridout & Maybee Llp
W-K-M Wellhead Systems Inc.
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