Check valve assembly

Details Check valve assembly Check valve assembly

1976-02-02

1977-09-20

Cline, William R.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

1375195, 13753311, 13753315, 166328, F16K 1504

Patent

active

040490157

ABSTRACT:
A check valve assembly for use in a drill string to limit reverse flow of drilling fluid through the string while permitting such fluid to be pumped freely into the well under normal conditions. The assembly may include: a valve body having a longitudinal flowbore therethrough; a valve seat at one end of the flowbore; a pair of inclined cylindrical recesses in the valve body communicating with the flowbore; and a ball member normally disposed in either one of the recesses and movable into the flowbore for sealing engagement with the seat in response to a predetermined rate of reverse flow through the flowbore.

REFERENCES:
patent: 193605 (1877-07-01), Hay
patent: 2320670 (1943-06-01), Scaramucci
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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