Reversible bit bearing

Details Reversible bit bearing Reversible bit bearing

1992-03-02

1993-05-04

Neuder, William P.

Boring or penetrating the earth

Below-ground impact members

Fluid-operated

175417, E21B 414

Patent

active

052072835

ABSTRACT:
A fluid-activated, percussive, down-the-hole drill having a reversible bearing and bit combination for altering the volume of return reservoir exhaust fluid between a larger amount for deep hole drilling and a smaller amount for shallow hole drilling.

REFERENCES:
patent: 4025133 (1977-05-01), Coinford
patent: 4103979 (1978-08-01), Kuhn
patent: 4553857 (1985-11-01), Ney
patent: 5115875 (1992-05-01), Ennis

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