Crossover seal assembly

Details Crossover seal assembly Crossover seal assembly

E - Fixed Constructions

21

B

166/47

E21B 33/03 (2006.01) E21B 33/08 (2006.01) F16J 15/08 (2006.01) F16J 15/26 (2006.01) E21B 33/00 (2006.01)

Patent

CA 1227747

CROSSOVER SEAL ASSEMBLY ABSTRACT OF THE DISCLOSURE A crossover seal assembly (44) for sealing the annuls between a well casing (16) and tubing head (22). The assembly includes spaced pairs of upper and lower metal seal rings (60 and 72, 108 and 120) having matching frusto-conical wedging surfaces (70 and 74, 118 and 122) which interact when an axial compressive force is applied to thereby effect a controlled radial expansion of the seal rings to sealingly engage the inner and outer cylindrical surfaces (48, 47) of the tubing head (22) and well casing (16). The axial compressive force is mechanically applied by a plurality of holddown lock screws (90) which interact through tapered conical tips (94) to energize the crossover seal assembly (44).

488140

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