Drill rod coupling system

Details Drill rod coupling system Drill rod coupling system

E - Fixed Constructions

21

B

64/20

E21B 17/042 (2006.01)

Patent

CA 1195520

DRILL ROD COUPLING SYSTEM ABSTRACT Improvements in a drill string such as used for earth drilling wherein the elongated drill steel sections and cooperable couplings include improved means for securing the drill steel sections together end-to-end to form the elongated drill string.

411082

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