Apparatus for hard rock sidewall coring a borehole

Details Apparatus for hard rock sidewall coring a borehole Apparatus for hard rock sidewall coring a borehole

1985-10-25

1987-12-22

Novosad, Stephen J.

Boring or penetrating the earth

Boring without earth removal

Combined with earth removal

175 58, 175 78, E21B 2502, E21B 4906

Patent

active

047141190

ABSTRACT:
A core drilling mechanism in an elongate housing is rotated from a vertical storage position to a horizontal operable position. This permits the transport downhole of a drilling mechanism of sufficient longitudinal dimension to drill a core sample of substantial length perpendicular to the borehole sidewall. A fixed slotted plate and hydraulically actuated rotatable drive plate control the motion of the drilling mechanism, which is stored vertically for descent and ascent, and rotated 90-degrees and moved outward for core drilling. After a core sample is drilled, the drilling mechanism is tilted upward to break off the core, and then returned to its vertical storage position.

REFERENCES:
patent: 4354558 (1982-10-01), Jageler et al.
patent: 4396074 (1983-08-01), Jageler et al.
patent: 4449593 (1984-05-01), Jageler et al.
patent: 4461360 (1984-07-01), Mount, II

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