Anti-rotation device for a steerable rotary drilling device

Details Anti-rotation device for a steerable rotary drilling device Anti-rotation device for a steerable rotary drilling device

2007-12-11

2007-12-11

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

Axially spaced opposed bore wall engaging guides

C175S099000

Reexamination Certificate

active

10164604

ABSTRACT:
In a drilling apparatus of the type comprising a rotatable drilling shaft and a housing for rotatably supporting a length of the drilling shaft for rotation therein, a rotation restraining device associated with the housing for restraining rotation of the housing. In one embodiment, the rotation restraining device is comprised of at least one roller on the housing, the roller having an axis of rotation substantially perpendicular to a longitudinal axis of the housing and being oriented such that it is capable of rolling about its axis of rotation in response to a force exerted on the roller substantially in the direction of the longitudinal axis of the housing. In a further embodiment, the rotation restraining device is comprised of at least one piston on the housing.

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