Drilling equipment, especially for use in underground mining

Details Drilling equipment, especially for use in underground mining Drilling equipment, especially for use in underground mining

1984-05-25

1986-12-02

Leppink, James A.

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

175 78, 173147, 464 19, E21C 100, E21C 500

Patent

active

046258159

ABSTRACT:
The invention relates to a drilling equipment whose annular bit (4) for cutting the rock located in the deepest point of the drill hole is provided with high-pressure water-jet nozzles and is connected via a flexible high-pressure hose pipe (13) with a high-pressure pump. In order to be able to drill with the aid of such a drilling equipment small-diameter drill holes of high directional stability, the invention proposes that the high-pressure hose pipe (13) be constructed to be rigid under torsion, non-rotatably connected to the annular bit (4) and the turning drive (24, 25) of the drilling machine (8) and to be journaled in a non-rotatable jacket tube (15) elastically deflectable from the extension position, said jacket tube being rigid in radial direction and guided in the area of the drill hole mouth in a deflecting device (7) and displaceable together with the high-pressure hose pipe (13) in its longitudinal direction.

REFERENCES:
patent: 1472782 (1923-11-01), Barber
patent: 2631821 (1953-03-01), Caldwell
patent: 2637527 (1953-05-01), Andrews
patent: 2644669 (1953-07-01), Curtis et al.
patent: 3149540 (1964-09-01), Lindgren et al.
patent: 3738433 (1973-06-01), O'Leary
patent: 3995700 (1976-12-01), Mayer
patent: 4007797 (1977-02-01), Jeter
patent: 4122936 (1978-10-01), Johnson
patent: 4149391 (1979-04-01), Driver
patent: 4368786 (1983-01-01), Cousins
patent: 4527639 (1985-07-01), Dickinson, III et al.

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