Drill rod for percussion drilling

Details Drill rod for percussion drilling Drill rod for percussion drilling

B - Operations, Transporting

25

D

255/56

B25D 9/00 (2006.01) E21B 17/042 (2006.01) F16L 15/00 (2006.01)

Patent

CA 1325421

Abstract The present invention relates to a drill rod for percussion drilling machines, consisting of a rod- or a sleeve-shaped element (10, 11, 12) that is provided with a threaded portion for engagement with another correspondingly threaded drill rod. In order to reduce the risk for pitting damages the threaded portion is provided with a wear lining in the form of a layer (19, 20) that is metallurgically bonded to the rod, said lining being made of a metallic material that is softer than the material of the rod, the latter usually being steel.

548711

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