Core retainer for sidewall core tools

Details Core retainer for sidewall core tools Core retainer for sidewall core tools

1984-09-27

1987-05-26

Novosad, Stephen J.

Boring or penetrating the earth

With means movable relative to tool to receive, retain, or...

175249, E21B 2506

Patent

active

046677534

ABSTRACT:
A hollow truncated cone made from material with elastic properties which expands around a core being cut from the sidewall of a borehole drilled in the earth with a core cutting means rigidly connected to a core barrel. The hollow truncated core is held in position inside the core barrel such that it does not rotate with the core cutting means during the cutting of a core.

REFERENCES:
patent: 2251679 (1941-08-01), Kinnear
patent: 3807234 (1974-04-01), Duperon
patent: 4059293 (1977-11-01), Sipler
patent: 4156469 (1979-05-01), Laskey
patent: 4400267 (1983-08-01), Brose

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