Earth drilling device

Details Earth drilling device Earth drilling device

1986-12-02

1988-01-19

Novosad, Stephen J.

Boring or penetrating the earth

With means to simultaneously feed and rotate tool from a...

175114, 175170, 175171, 74128, 173163, E21B 302, E21B 722

Patent

active

047199784

ABSTRACT:
To rotate a pipe (17) to be urged into the ground, a rotary disk (20) clamped at said pipe (17) is pivotable on a table (19) which carries two groups of driving cylinders (40, 41). While the first group is operative to carry out the working stroke in order to turn the rotary disk (20) the return stroke is performed by the second group thus ensuring a continuous rotation of the rotary disk (20) or a standstill in one sense of rotation.

REFERENCES:
patent: 3515009 (1970-06-01), Matusch et al.
patent: 3799276 (1974-03-01), Matsushita et al.
patent: 3874196 (1975-04-01), Hisey et al.
patent: 4496272 (1985-01-01), Teske
patent: 4624324 (1986-11-01), Mathieu et al.

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