Directional downhole drill apparatus

Details Directional downhole drill apparatus Directional downhole drill apparatus

1988-05-09

1989-08-01

Neuder, William P.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

175107, 175296, F21B 1700

Patent

active

048526690

ABSTRACT:
An apparatus is provided whereby a standard percussive-type downhole drill may be utilized in directional drilling. This eliminates the need for less efficient tri-cone type downhole motors in this application. A motor is provided directly on top of the hammer at the end of the drill string, which both rotates the hammer and allows the passage of compressed air to the hammer for its piston operation. A preferred embodiment of the motor is an air-driven turbine with a replaceable connecting subassembly to link the motor shaft to the hammer apparatus.

REFERENCES:
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patent: 2979033 (1961-04-01), Bassinger
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patent: 3517754 (1970-06-01), Hughes
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patent: 4019591 (1977-04-01), Fox
patent: 4019592 (1977-04-01), Fox
patent: 4049066 (1977-09-01), Richey
patent: 4084646 (1978-04-01), Kurt
patent: 4278136 (1981-07-01), Hansson

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