Gang drill construction

Details Gang drill construction Gang drill construction

1986-10-24

1988-03-08

Novosad, Stephen J.

Boring or penetrating the earth

With below-ground tool drive prime mover

Plural below-ground drive prime movers

175417, E21B 416

Patent

active

047294396

ABSTRACT:
Disclosed is a new method of construction for multiple or gang down hole rock drills. A rigid mounting cylinder with alignment and securing means for the individual drills is provided. The cylinder further serves to attach the multiple drills to a single drill string which supplies air to the individual drills. The cylinder further facilitates rock chip removal by filling all but the peripheral annulus which forms the exit channel for exhaust air.

REFERENCES:
patent: 3144086 (1964-08-01), Kurt et al.
patent: 3297099 (1967-01-01), Adams et al.
patent: 3387673 (1968-06-01), Thompson
patent: 3682258 (1972-08-01), Kelly, Jr. et al.
patent: 4084646 (1978-04-01), Kurt
patent: 4478296 (1984-10-01), Richman, Jr.

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