Steerable drilling tool and system

Details Steerable drilling tool and system Steerable drilling tool and system

1995-09-14

1997-04-08

Neuder, William P.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

E21B 700

Patent

active

056179260

ABSTRACT:
A steerable rotary drilling tool includes a drill bit mounted on the lower end of a housing by a drive shaft having an articulative coupling that allows the bit's rotation axis to be inclined relative to the rotation axis of the housing, an eccentric weight in the housing that maintains the bit axis pointed in only one direction in space as the bit is turned by the housing, and a clutch system that allows such direction to be changed downhole. A measuring-while-drilling tool is included to allow the progress of the drilling to be monitored at the surface, and to allow changing the bit axis or toolface by a selected amount.

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Anadrill Schlumberger Brochure, "Anadrill Tightens Directional Control with Downhole-Adjustable Stabilizers", no date.

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