Bit extension guide for sidewall corer

Details Bit extension guide for sidewall corer Bit extension guide for sidewall corer

1982-09-29

1984-07-24

Purser, Ernest R.

Boring or penetrating the earth

Means carried by housing insertable in inaccessible hole to...

175 58, 175 77, E21B 4906

Patent

active

044613601

ABSTRACT:
An apparatus for drilling a sidewall core from a borehole which has a cylindrical housing with an opening through which a core bit and barrel are extended and retracted. In a preferred embodiment there is a fixed plate on opposite sides of the bit motor with guide slots cut therethrough. A drive plate is provided adjacent each fixed plate having guide slots. The bit motor has two pins on each side which extend through the guide slots of the drive plate. Movement of the drive plates causes the bit motor to follow the designated path.

REFERENCES:
patent: 2198821 (1940-04-01), Jessup
patent: 4396074 (1983-08-01), Jageler et al.

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