E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/042 (2006.01) E21B 17/10 (2006.01) E21B 21/10 (2006.01) E21B 23/00 (2006.01) E21D 21/00 (2006.01)
Patent
CA 2093138
-32- ABSTRACT DRILL PIPE In order to achieve improved flow properties for a flushing medium charged with rock particles freed during the drilling phase, an injection drilling anchor is proposed whose anchor rods (2), coupling members (3), injection valves (15), an intermediate member (9) containing a non-return valve, as well as drill head (1) are designed such that these components are connected one to the other below one another always by screw fittings, so that in the assembled state one has a fully homogeneous structure from the drill head (1) upwards. The drill head is characterised by an external thread extending uniformly over the full length and consequently has a uniform diameter, so that after drilling has taken place, starting from the mouth of the borehole, a spacer can be pushed within the borehole along the full length of the borehole over the anchor rods (2) to any desired point. The anchor rods (2) are provided over their full length with a uniform internal threading, so that a cutting to a particular length does not hinder their utility for use in the framework of the injection drilling anchor (1). The coupling members, the injection valves (15), intermediate member (9) and the drill head (1) for this purpose comprise tubular cylinders (20, 21; 10; 6) which correspond in terms of their internal and external threading with the anchor rods (2) and which each have a stop function for the positional screwing together of the parts. (Fig.1)
Gd-Anker Gruber-Dubel-Anker Gmbh
Kirby Eades Gale Baker
LandOfFree
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