Check valve assembly

Details Check valve assembly Check valve assembly

1974-08-08

1977-08-09

Cline, William R.

Fluid handling

Line condition change responsive valves

Direct response valves

137460, 166325, F16K 1504

Patent

active

040404412

ABSTRACT:
A check valve assembly for use in a drill string to prevent reverse flow of drilling fluid through the string while permitting such fluid to be pumped downwardly through the well under normal conditions. The assembly includes: a valve body; a ball valve member, normally located out of the flow path in a side recess; a valve seat located above the valve member and means for controlling the rate of reverse flow of fluid required to move the valve member out of the side recess and against the valve seat.

REFERENCES:
patent: 924207 (1909-06-01), Wilson
patent: 965102 (1910-07-01), Griogi
patent: 2741260 (1956-04-01), Verhoeff et al.
patent: 2743905 (1956-05-01), Eckel
patent: 2981285 (1961-04-01), Nilo
patent: 3269463 (1966-08-01), Page, Jr.
patent: 3332497 (1967-07-01), Page, Jr.
patent: 3334697 (1967-08-01), Edwards et al.
patent: 3584645 (1971-06-01), Radig

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