E - Fixed Constructions – 21 – D
Patent
E - Fixed Constructions
21
D
61/65
E21D 11/00 (2006.01) E21D 9/10 (2006.01) E21D 9/12 (2006.01)
Patent
CA 1047264
OMNIDIRECTIONAL DRILLING SYSTEM Abstract of the Disclosure A drilling or tunneling system in which a first, relatively large diameter bore is made, the loosened material is mixed with a stabilizing material, and a plurality of smaller permanent ducts are formed behind the boring unit. Power, control information, stabilizing material and excess material are conveyed to and from the unit by means of a series of mobile carrier units which travel through the smaller ducts and which function in the manner of an endless conveyor.
229952
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