Drilling device for drilling a core in deep drill holes

Details Drilling device for drilling a core in deep drill holes Drilling device for drilling a core in deep drill holes

1982-05-13

1984-06-05

Pate, III, William F.

Boring or penetrating the earth

With below-ground tool drive prime mover

Fluid rotary type

17237, 17317, E21B 402, E21B 2500

Patent

active

044523220

ABSTRACT:
In a core drilling apparatus wherein a core bit is driven by a hydraulically actuated Moineau type motor, control valve means are provided whereby drilling fluid can be directed through the core sleeve to remove debris from its interior, and, subsequently diverted outside of the core sleeve when drilling begins. Alternative constructions are shown whereby the flushing of the core sleeve can be accomplished with the motor drive in an inactive mode or in an operating mode.

REFERENCES:
patent: 2910273 (1951-10-01), Bor
patent: 2915285 (1959-12-01), Deily
patent: 2944792 (1960-07-01), Gros
patent: 3055440 (1962-09-01), Tiraspolsky et al.
patent: 3850194 (1974-11-01), Brown
patent: 3989114 (1976-11-01), Tschirky

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