Pump down tool and check valve

Details Pump down tool and check valve Pump down tool and check valve

1983-04-18

1985-02-12

Leppink, James A.

Wells

With below and above ground modification

Head for tool, piston or cleaner

166 77, 166153, E21B 2308

Patent

active

044985320

ABSTRACT:
A device for use during operation of a borehole survey probe or the like. The device is attachable to a flexible cable which in turn is connected to the survey probe, and the device includes an outer sealing or swab member and an interior valve. The valve and sealing member cooperate during pumping of the survey probe down through a conduit, and the valve opens during retrieval of the survey probe so that fluid in the conduit passes through the device as the survey probe is removed.

REFERENCES:
patent: 3104714 (1963-09-01), Terrel et al.
patent: 3312282 (1967-04-01), Yetman
patent: 3378891 (1968-04-01), Metz
patent: 3394760 (1968-07-01), Childers et al.
patent: 3965978 (1976-06-01), Conley et al.
patent: 4295536 (1981-10-01), Jones, Jr. et al.

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