Boring tube

Details Boring tube Boring tube

E - Fixed Constructions

21

D

E21D 20/02 (2006.01) E21B 10/60 (2006.01) E21B 17/10 (2006.01) E21B 17/22 (2006.01) E21D 21/00 (2006.01)

Patent

CA 2081681

ABSTRACT OF THE DISCLOSURE A boring tube has at least one tubular base body having a throughgoing longitudinal passage and an outer side and a coil arranged on the outer side of the base body and extending over its whole length. The coil has a pitch of 1 m - 3 m and a radial width which starting from the outer side of the base body is at least 10 mm. -28-

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