Pipe joints or couplings – Pipe to discreet nipple or sleeve to plate – Nipple sealed to plate
Patent
1978-06-06
1980-11-11
Frazier, Roy D.
Pipe joints or couplings
Pipe to discreet nipple or sleeve to plate
Nipple sealed to plate
285 18, 285143, 285307, 285321, 166217, F16L 3500
Patent
active
042328896
ABSTRACT:
A well pipe hanger assembly for suspending an inner pipe from an outer pipe. A hanger body with an annular recess in its outer peripheral surface in which a resiliently expandable and contractible locking ring is positioned in the recess between two stop shoulders for engagement with a matching profile on the inner peripheral surface of the outer pipe. The locking ring includes first and second telescoping portions with a re-engageable releasing means betweeen the first and second portions, initially holding the portions together but allowing longitudinal disengagement and re-engagement of the telescoping portions. Preferably, the re-engagable releasing means includes beveled cam surfaces on each portion thereby providing a recockable expanding hanger which automatically allows recocking of the locking means upon upward movement of the hanger body.
REFERENCES:
patent: 2356208 (1944-08-01), Bridwell
patent: 3071193 (1963-01-01), Raulins
patent: 3285283 (1966-11-01), Calvin
patent: 3507329 (1970-04-01), Stone
patent: 3741589 (1973-06-01), Herd et al.
patent: 3918747 (1975-11-01), Putch
Frazier Roy D.
Nelson Norman A.
Pietruszka Carl F.
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