Earth drilling apparatus and method

Details Earth drilling apparatus and method Earth drilling apparatus and method

1983-03-02

1985-02-05

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

72166, 72388, 175 77, E21B 708, E21B 718

Patent

active

044973810

ABSTRACT:
Earth well drilling apparatus including piping in a well, a metal drilling tube within the piping, and a hydraulic jet drilling head secured to the lower end of the tube. A seal is disposed between the piping and the tube. The drilling head is urged downwardly through the piping under hydraulic pressure through a tube bneding assembly laterally extensible from a retracted position substantially within the structure. The hydraulic pressure propels the tube downwardly through the piping and bending assembly to bend the tube and to direct the drilling head laterally toward the formation.

REFERENCES:
patent: 1865853 (1932-07-01), Granville
patent: 4003233 (1977-01-01), Strange

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