Raise drill apparatus

Details Raise drill apparatus Raise drill apparatus

1979-05-14

1982-02-16

Feldbaum, Ronald

Tool driving or impacting

Advance causing or controlling means

Motor causes or controls advance

173152, B23Q 5027, B23Q 5033

Patent

active

043155529

ABSTRACT:
A drilling apparatus includes a ground engaging base, a torque transmitting apparatus for engaging and transmitting torque to drill pipe, and hydraulic cylinders connected to the base for moving the torque transmitting apparatus back and forth along the drill pipe axis. The hydraulic cylinders are connected to the base and include open ends facing away from the base. A piston rod is movable in and projects outwardly from the open end of each cylinder. A guide tube surrounds and is connected to the outer end of each piston rod. The guide tubes include inner surface portions which overlap and slidingly engage outer surface portions of the cylinders and the torque transmitting apparatus is connected between the guide tubes.

REFERENCES:
patent: 2090854 (1937-08-01), Timbs
patent: 3220494 (1965-11-01), Cannon et al.
patent: 3454114 (1969-07-01), Poage
patent: 3490546 (1970-01-01), Hattrup et al.
patent: 3754605 (1973-08-01), Porter et al.
patent: 3797587 (1974-03-01), Klien
patent: 3850253 (1974-11-01), Lupton et al.
patent: 3857451 (1974-12-01), Williams

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