Device for controlling the orientation of bore holes

Details Device for controlling the orientation of bore holes Device for controlling the orientation of bore holes

E - Fixed Constructions

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E21B 7/08 (2006.01) E21B 4/02 (2006.01) E21B 4/04 (2006.01) E21B 4/20 (2006.01) E21B 7/06 (2006.01) E21B 41/00 (2006.01) E21B 47/022 (2006.01)

Patent

CA 1154749

ABSTRACT OF THE DISCLOSURE A device for controlling the inclination of underground bore holes is in form of a drill guide rod having an outer element and an inner element which rotates coaxially in the outer element. Strip-shaped members can be pivoted out from the outer element in the same manner as the ribs of an umbrella, and electrical in- clinometers in the rod furnish the signals which control the time and degree of such pivoting. -1-

367657

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