Drill machine guidance using natural occurring radiation

Details Drill machine guidance using natural occurring radiation Drill machine guidance using natural occurring radiation

E - Fixed Constructions

21

B

255/6

E21B 7/04 (2006.01) E21B 7/06 (2006.01) E21B 47/022 (2006.01) E21C 35/08 (2006.01)

Patent

CA 1112636

Abstract of the Disclosure A method for guidance of a drilling apparatus along a desired path within a substantially horizontal coal seam, such method utilizing the natural radioactivity that is commonly present in mineral beds associated with coal deposits.

339070

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