Guiding device for percussion drills

Details Guiding device for percussion drills Guiding device for percussion drills

E - Fixed Constructions

21

B

255/57

E21B 17/10 (2006.01) E21B 17/00 (2006.01) E21B 17/042 (2006.01)

Patent

CA 1161830

ABSTRACT OF THE DISCLOSURE A guiding means in rock drilling for guiding a percussion drill string comprises a guide sleeve. For purposes of ensuring free rotation between the drill string and the guide sleeve the latter is bound by shape to the drill string at its one end during drilling as well as during withdrawal of the drill string.

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