Process and device for simultaneously drilling and lining a...

Details Process and device for simultaneously drilling and lining a... Process and device for simultaneously drilling and lining a...

E - Fixed Constructions

21

B

E21B 7/20 (2006.01) E02D 5/76 (2006.01) E21B 10/64 (2006.01) E21D 20/00 (2006.01) E21D 21/00 (2006.01)

Patent

CA 2271655

In a process for drilling, in particular rotary percussion or percussion drilling, and lining holes in the ground or rocks, a hole (13) is percussion and/or rotation drilled by a cutter (1,2,3) mounted on boring rods (9) and a lining is formed by a jacket tube (5). During drilling, at least one jacket tube (5,5') coupled to the cutter (1,2) is drawn in the axial direction by the cutter (1,2,3) into the bore hole (13) and once drilling is finished, the cutter (3) is at least partially removed from the jacket tube (5,5') together with the boring rods (9). In a device for drilling, in particular percussion or rotary percussion drilling, and lining holes in the ground or rocks, a cutter (1,2,3) mounted on boring rods (9) drills a bore hole by percussion and/or rotary drilling. The cutter (1,2,3) is divided in the radial direction. At least one jacket tube (5,5') which surrounds the boring rods (9) is located at the end of the cutter (3) away from the drilling surface, around the outer circumference of the cutter (3), and is form-fittingly joined to the cutter (1) by at least one coupling element (6) so as to be drawn in the longitudinal direction of the bore hole (13).

Selon ce procédé de forage, notamment de forage percutant ou roto-percutant, et de revêtement de trous creusés dans le sol ou des matières rocheuses, on creuse un trou (13) par un mouvement percutant et/ou rotatif au moyen d'une couronne à diamants (1, 2, 3) montée sur un train de tiges (9) et on forme un revêtement au moyen d'une gaine tubulaire (5). Pendant le forage, au moins une gaine tubulaire (5, 5') couplée à la couronne de diamants (1, 2, 3) est axialement tirée par la couronne de diamants (1, 2, 3) dans le trou (13) et une fois le forage achevé, la couronne de diamants (3) est retirée au moins en partie avec le train de tiges (9) de la gaine tubulaire (5, 5'). Dans le dispositif de forage décrit, notamment de forage percutant ou roto-percutant, et de revêtement de trous creusés dans le sol ou des matières rocheuses, une couronne de diamants (1, 2, 3) montée sur un train de tiges (9) creuse un trou de forage par un mouvement percutant et/ou rotatif. La couronne de diamants (1, 2, 3) est divisée en deux parties dans le sens radial. Au moins une gaine tubulaire (5, 5') qui entoure le train de tiges (9) est située autour de la circonférence extérieure de la couronne de diamants (3), à son extrémité opposée à la surface de forage, et est reliée par liaison de forme à la couronne de diamants (1) par au moins un élément d'accouplement (6) de façon à être entraînée par traction dans le sens longitudinal du trou de forage (13).

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