STEERABLE DRILLING SYSTEM
First Claim
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1. A steerable drilling system comprising a bias unit operable by means of a control valve arrangement, the control valve arrangement comprising a rotary valve having a control shaft the angular position of which is controlled by a motor.
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Abstract
A steerable drilling system comprises a bias unit 14 operable by means of a control valve arrangement 22, the control valve arrangement 22 comprising a rotary valve 24 having a control shaft 28 the angular position of which is controlled by a motor 30.
42 Citations
10 Claims
- 1. A steerable drilling system comprising a bias unit operable by means of a control valve arrangement, the control valve arrangement comprising a rotary valve having a control shaft the angular position of which is controlled by a motor.
Specification