All terrain drill unit

Details All terrain drill unit All terrain drill unit

E - Fixed Constructions

21

B

255/17

E21B 15/00 (2006.01) E21B 7/02 (2006.01)

Patent

CA 1117518

ABSTRACT In an all terrain drill having a mobile chassis and a drilling head on a subframe capable of operation in various attitudes relative to the chassis, both the chassis and the drilling head are driven hydraulically by a vari- able displacement pump which operates alternatively either propulsion motors or a drill motor, drive from the motor to the drill being through a change-speed gearbox and direct gearing. Other hydraulic functions are powered from a separate pump. -1-

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