Drilling equipment with adaptor for steering long boreholes

Details Drilling equipment with adaptor for steering long boreholes Drilling equipment with adaptor for steering long boreholes

1981-12-29

1984-10-16

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175 73, 175406, 192 96, 192 71, 166237, E21B 708

Patent

active

044769431

ABSTRACT:
Drilling equipment for steering relatively long boreholes in rock strata comprises an adaptor for installation adjacent to the drill bit, the adaptor having an inner rotary component drivably connected between the drill rod assembly and the drill bit and a relatively outer component. Releasable latch means are provided having two operational modes in the first of which the inner and outer components are fixedly engaged for rotary motion and in the second mode of which the inner component can rotate relative to the outer component. Also actuatable means are provided for controlling the operational mode of the releasable latch means.

REFERENCES:
patent: 1844371 (1932-02-01), Santiago
patent: 2122754 (1938-07-01), Rohrbaugh
patent: 2815930 (1957-12-01), Storm
patent: 3593810 (1971-07-01), Fields
patent: 4076084 (1978-02-01), Tighe
patent: 4108256 (1978-08-01), Moore
patent: 4319649 (1982-03-01), Jeter

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