Hydraulic drilling device

Details Hydraulic drilling device Hydraulic drilling device

1977-05-12

1979-01-16

Hafer, Robert A.

Tool driving or impacting

Means to drive tool about an axis

Means to hold and relatively rotate sections of tool shaft

173104, E21B 300

Patent

active

041344600

ABSTRACT:
This drilling device includes a hydraulic motor, coaxially surrounding the drill rod, for rotating the drill. The rotor of the motor directly rotates the drill, without the use of gears. Advantageously, the rotor includes a replaceable adapter sleeve that has a shape conforming to the peripheral shape of the drill. By replacing the sleeve, drill rods of different shape or size can be accommodated. The rotor may be of the wing cell type, wherein a plurality of radially moveable vanes or wings project radially from a circular rotor into contact with the inner wall of a non-circular cylinder wall. The vanes define cells within which the hydraulic fluid presses against the vanes so as to impart rotation to the rotor, sleeve and drill.

REFERENCES:
patent: 3103676 (1963-09-01), Kehaly
patent: 3166131 (1965-01-01), Worman
patent: 3472323 (1969-10-01), Hall
patent: 3701386 (1972-10-01), Feucht
patent: 3752241 (1973-08-01), Bent
patent: 3858666 (1975-01-01), Bailey et al.

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