Non-rotating stabilizer for raise boring

Details Non-rotating stabilizer for raise boring Non-rotating stabilizer for raise boring

E - Fixed Constructions

21

B

255/28

E21B 17/10 (2006.01) E21B 7/28 (2006.01) E21B 10/28 (2006.01) E21D 3/00 (2006.01)

Patent

CA 1131612

4273-A NON-ROTATING STABILIZER FOR RAISE BORING Abstract of the Disclosure A non rotating stabilizer for raise boring having a diameter substantially equal to the raise head and which is positioned below the raise head so as to follow it as the hole is bored is disclosed. A second raise head having a larger diameter than the stabilizer may be positioned below the stabilizer.

358819

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