Jarring tool

Details Jarring tool Jarring tool

1976-11-15

1978-08-08

Leppink, James A.

Boring or penetrating the earth

Below-ground impact members

With releasable means to detachably retain telescoping...

E21B 110

Patent

active

041050827

ABSTRACT:
A jarring tool for use in a drill string to prevent sticking of the drill string during drilling operations. The jarring tool has a torque assembly for continually torquing the jar and thus the drilling operation need not be discontinued upon encountering an interfering object. The jarring tool is particularly suited for high viscosity drilling operations and eliminates hydrostatic sticking of the drill string by providing an immediate jarring action utilizing a simple hammer and anvil construction. The jarring tool is also suitable for use in a "fishing" string.

REFERENCES:
patent: 2008765 (1935-07-01), McCullough
patent: 2029579 (1936-02-01), McCullough
patent: 2101968 (1937-12-01), Wickersham
patent: 2144810 (1939-01-01), Raymond
patent: 2562321 (1951-07-01), Lowe
patent: 3685598 (1972-08-01), Nutter
patent: 3735827 (1973-05-01), Berryman
patent: 3797591 (1974-03-01), Berryman

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