Hydraulic drilling apparatus and method

Details Hydraulic drilling apparatus and method Hydraulic drilling apparatus and method

1989-05-12

1990-06-05

Novosad, Stephen J.

Boring or penetrating the earth

Automatic control

Of fluid pressure below ground

175 45, 175 67, 175424, E21B 718, E21B 47024

Patent

active

049305867

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 orientation of the drill head is monitored by tilt and roll sensors, and the discharge of drilling fluid through radially or obliquely directed nozzles is controlled by poppet valves in accordance with the orientation to control the direction in which the hole is cut.

REFERENCES:
patent: 3081828 (1963-03-01), Quick
patent: 3712391 (1973-01-01), Coyne
patent: 3791042 (1974-02-01), Bell
patent: 4458766 (1984-07-01), Siegel
patent: 4610321 (1986-09-01), Whaling
patent: 4637479 (1987-01-01), Leising
patent: 4674579 (1987-06-01), Geller et al.
patent: 4714118 (1987-12-01), Baker et al.
patent: 4787465 (1988-11-01), Dickinson, III et al.
patent: 4790394 (1988-12-01), Dickinson, III et al.

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