Dual ring casing hanger

Details Dual ring casing hanger Dual ring casing hanger

1981-10-29

1984-07-17

Novosad, Stephen J.

Wells

Expansible anchor or casing

Expansible means translated by wedge or cam

166382, E21B 2300

Patent

active

044600429

ABSTRACT:
A hanger apparatus for suspending an upright inner pipe from an outer pipe including a pair of load-bearing rings interposed between the two pipes. The inner and outer pipes have opposed frustoconical load-bearing shoulders receiving the rings therebetween. In one embodiment, both rings engage the inner and outer pipes, with an upper ring being driven outwardly into a locking position by a lower ring. In this case, the upper ring is split while the lower ring is solid. In a second embodiment, an outer ring engages both the inner and outer pipes while an inner ring is nested into the outer ring and engages the inner pipe. In this second embodiment, both rings are split.

REFERENCES:
patent: 3420308 (1969-01-01), Putch
patent: 3472530 (1969-10-01), Fowler
patent: 3592489 (1971-07-01), Baugh
patent: 3893717 (1975-07-01), Nelson
patent: 3918747 (1975-11-01), Putch
patent: 4073511 (1978-02-01), Haas et al.
patent: 4167970 (1979-09-01), Cowan
patent: 4181331 (1980-01-01), Cowan
patent: 4232889 (1980-11-01), Putch
patent: 4295665 (1981-10-01), Pierce
patent: 4319773 (1982-03-01), Lawson

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