Method and apparatus for obtaining a core sample at ambient pres

Details Method and apparatus for obtaining a core sample at ambient pres Method and apparatus for obtaining a core sample at ambient pres

1989-04-06

1990-08-21

Kisliuk, Bruce M.

Boring or penetrating the earth

Processes

Sampling of earth formations

175233, 175244, 7386311, 7386445, E21B 4906

Patent

active

049508440

ABSTRACT:
For use with a core sample tool removing a sample from a formation of interest, a sonde supported sample receiving chamber is disclosed. It includes a main valve for sample insertion into a cavity in a resilient sleeve. The sleeve is in a chamber connected by suitable valved passages to enable ambient pressure at the cavity to equal downhole pressure; by valve operation this pressure can be maintained after chamber removal and transfer.

REFERENCES:
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patent: 2456331 (1948-12-01), Sewell
patent: 2734719 (1956-02-01), Otway
patent: 3146837 (1964-09-01), Bridwell
patent: 3148740 (1964-09-01), Cauchois
patent: 4304122 (1981-12-01), Tentor
patent: 4317490 (1982-03-01), Milberger et al.
patent: 4425810 (1984-01-01), Simon et al.
patent: 4714119 (1987-12-01), Hebert et al.

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