Drilling device

Details Drilling device Drilling device

1982-03-26

1985-07-02

Novosad, Stephen J.

Boring or penetrating the earth

With below-ground tool drive prime mover

With below-ground feed means

175 99, 175308, 175405, E21B 2510

Patent

active

045262420

ABSTRACT:
A drilling device which can be lowered in a drill hole consists of a drive device, a drill which is rotated by this drive device and a clamping device formed as a unit which can be engaged with the inside wall of the drill hole and serves to transfer the torque of the drive to the drill. The drill consists of a ring-shaped housing, the outside diameter of which corresponds with the diameter of the drill hole and the upper part of is closed off by a plate. The housing contains several cutting tools which are equipped with bore crowns which serve to cut out a drill core and which are arranged at uniform distances and parallel with the longitudinal axis of the drilling device. Using additional drive devices, the cutting tools are designed to impart impact impulses and/or additional rotational movements in an axial direction. All drive devices are fluid actuated in such a manner that the clamping device is actuated initially and the drill is subsequently activated by the increasing pressure of the fluid medium.

REFERENCES:
patent: 2054255 (1936-09-01), Howard
patent: 2541785 (1951-02-01), Smith
patent: 3790213 (1974-02-01), Grable
patent: 4102411 (1978-07-01), Webb et al.
patent: 4102415 (1978-07-01), Cunningham

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