Power feed system for a rotary drill

Details Power feed system for a rotary drill Power feed system for a rotary drill

E - Fixed Constructions

21

B

255/18

E21B 19/08 (2006.01) E21B 19/086 (2006.01) F01B 15/02 (2006.01)

Patent

CA 1232899

ABSTRACT POWER FEED SYSTEM FOR A ROTARY DRILL Disclosed herein is a power feed system for trans- lating a rotary drill head along the length of a guide tower. The system utilizes a compound balanced area, end fed hydraulic cylinder as the actuating means. This arrangement provides a large ratio of fixed overall length to usable travel distance, balanced reed force in both directions, direct connection or the rotary head to the outer stage of the cylinder, and drift-free operation, all without the need for moving hydraulic hoses.

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