Mobile drilling apparatus

Details Mobile drilling apparatus Mobile drilling apparatus

1983-10-25

1987-11-03

Kazenske, E. R.

Tool driving or impacting

Advance causing or controlling means

Motor causes or controls advance

173 28, E21B 302

Patent

active

047038128

ABSTRACT:
A mobile drilling apparatus having a support structure, a mast positioned on the support structure, a drill head and a hydraulic assembly vertically operable on and guided by the mast. The hydraulic assembly moves the drill head and includes lower hydraulic cylinders rigidly connected to the mast and upper cylinders, each mounted inside and connected rigidly to a tube. A piston rod with connected upper and lower pistons is movable within the upper and lower hydraulic cylinders. The drill head is connected to the lower portion of the tube.

REFERENCES:
patent: 3131776 (1964-05-01), Aune et al.
patent: 3228487 (1966-01-01), Failing
patent: 3282357 (1966-11-01), Bunn
patent: 3814194 (1974-06-01), Reich et al.
patent: 3958376 (1976-05-01), Campbell

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