Process and drilling equipment for sinking a well in underground

Details Process and drilling equipment for sinking a well in underground Process and drilling equipment for sinking a well in underground

1991-07-30

1993-04-27

Britts, Ramon S.

Boring or penetrating the earth

Automatic control

In response to drilling fluid circulation

175 65, 175321, E21B 2108

Patent

active

052053644

ABSTRACT:
The present invention is a drilling tool including a telescoping assembly for transmitting hydraulic force to the drill bit at the bottom of the tool. The internal hydraulic characteristics of the tool may be varied to vary the force through extension and retraction of the telescoping assembly.

REFERENCES:
patent: 3814183 (1974-06-01), Kishel
patent: 3997008 (1976-12-01), Kellner
patent: 4261427 (1981-04-01), Sutliff et al.
patent: 4434863 (1984-03-01), Garrett
patent: 4440241 (1984-04-01), Anders
patent: 4552230 (1985-11-01), Anderson et al.
patent: 4763734 (1988-08-01), Dickenson et al.

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