Fluid dump mechanism

Details Fluid dump mechanism Fluid dump mechanism

1978-02-10

1979-07-17

Purser, Ernest R.

Boring or penetrating the earth

Below-ground impact members

Fluid-operated

166178, E21B 110

Patent

active

041612248

ABSTRACT:
Disclosed is an apparatus for controlling sliding movement between two telescoping members of a jar or like apparatus for use in an oil well. The telescopic sliding movement between the two members is controlled by a hydraulic impedance device which is bypassed by a hydraulic fluid dump valve after a predetermined amount of telescopic movement between the two members. A dump valve opening means is releasably attached to the walls of one of the members and, after opening the dump valve mechanism, releases from the member wall to move with the telescoping member holding the dump valve mechanism in the open condition. Means is also disclosed for recocking the apparatus and for returning the opening means to its initial position such that the opening means is reattached to the wall of said one member.

REFERENCES:
patent: 3735827 (1973-05-01), Berryman
patent: 3797591 (1974-03-01), Berryman
patent: 3851717 (1974-12-01), Berryman
patent: 4059167 (1977-11-01), Berryman
patent: 4076086 (1978-02-01), Evans

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