Hydraulic drilling apparatus and method

Details Hydraulic drilling apparatus and method Hydraulic drilling apparatus and method

1989-11-17

1991-02-12

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175 67, 175424, E21B 708, E21B 718

Patent

active

049916670

ABSTRACT:
Hydraulic drilling method and apparatus in which the drilling fluid itself is utilized to control the direction in which a hole is bored in the earth. The drilling fluid is discharged through a plurality of forwardly facing nozzles which are inclined at different angles about the axis of the drill head, and the drilling fluid is selectively applied to the nozzles by a rotatable valve member to control the direction in which the hole is cut.

REFERENCES:
patent: 2873092 (1959-02-01), Dwyer
patent: 3211244 (1965-10-01), Cordary
patent: 3576222 (1971-04-01), Acheson et al.
patent: 4262757 (1981-04-01), Johnson, Jr. et al.
patent: 4637479 (1987-01-01), Leising
patent: 4787465 (1988-11-01), Dickinson III et al.
patent: 4790394 (1988-12-01), Dickinson III et al.

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