Pipe joints or couplings – Pipe to discreet nipple or sleeve to plate – Nipple sealed to plate
Patent
1981-08-04
1983-02-15
Arola, Dave W.
Pipe joints or couplings
Pipe to discreet nipple or sleeve to plate
Nipple sealed to plate
285307, 285321, 166208, F16L 2100
Patent
active
043737528
ABSTRACT:
A well casing hanger assembly for releasably connecting first and second well casings to and from each other in a well by longitudinal movement of the first member. The first member includes an annular recess in its peripheral surface and a stop shoulder is positioned at each end of the recess and a resiliently expandable and contractible locking ring is positioned in the recess for engagement with a locking notch on the second member. A protrusion is positioned in the recess and initially coacts with an opening in the locking ring. An improved releasable holding means is provided for initially preventing the locking ring from moving axially on the first member until the locking ring expands and engages the second member. The releasable holding means includes first and second tapered surfaces on the first member for engaging and restraining downward movement of the first member relative to the locking ring until the locking ring expands into the locking notch and thereafter act to positively force the locking ring into the set position. The locking ring may include coacting tapered surfaces for coacting with the first and second tapered surfaces and may include a C-shaped release ring positioned in the opening which includes a tapered surface coacting with the second tapered surface.
REFERENCES:
patent: 3472530 (1969-10-01), Fowler
patent: 3592489 (1971-07-01), Baugh
patent: 3893747 (1975-07-01), Nelson et al.
patent: 3918747 (1975-11-01), Putch
patent: 4167970 (1979-09-01), Cowan
patent: 4167971 (1979-09-01), Cowan
patent: 4181331 (1980-01-01), Cowan
patent: 4232889 (1980-11-01), Putch
Arola Dave W.
Putch Samuel
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