Hydraulic drilling method with penetration control

Details Hydraulic drilling method with penetration control Hydraulic drilling method with penetration control

1990-07-30

1993-10-26

Bagnell, David J.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175 67, 299 17, E21B 708, E21B 718

Patent

active

052557502

ABSTRACT:
Hydraulic drilling apparatus and method in which a drill head is driven toward the formation being drilled by the force of the drilling fluid, and the rate of advancement or penetration of the drill head is controlled by entrapping a fluid in a chamber to resist advancement of the drill head and allowing a controlled amount of the entrapped fluid to pass out of the chamber through an orifice to permit the drill head to advance at a controlled rate.

REFERENCES:
patent: 2271005 (1942-01-01), Grebe
patent: 2937007 (1960-05-01), Whittle
patent: 3815692 (1974-06-01), Varley
patent: 4527639 (1985-07-01), Dickinson et al.
patent: 4763734 (1988-08-01), Dickinson et al.
patent: 4787465 (1988-11-01), Dickinson et al.
patent: 4790384 (1988-12-01), Schellstede et al.
patent: 4790394 (1988-12-01), Dickinson et al.

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