Method for cleaning a core sample from a subterranean formation

Details Method for cleaning a core sample from a subterranean formation Method for cleaning a core sample from a subterranean formation

1986-07-30

1987-08-18

Levy, Stewart J.

Cleaning and liquid contact with solids

Processes

Using sequentially applied treating agents

B08B 3000

Patent

active

046875239

ABSTRACT:
A core sample from a subterranean formation is injected with an aqueous fluid and a pressurized gas which is soluble in the aqueous fluid. The fluid pressure is maintained within the core sample for a predetermined soak period. The core sample is then rapidly depressurized to atmospheric pressure so that gas is very rapidly or dynamically evolved out of solution within the core sample and rapidly transports solid contaminant particles to the outer surface of the core sample where they may be removed.

REFERENCES:
patent: 2371645 (1945-03-01), Aitchison et al.
patent: 2617719 (1952-11-01), Stewart
patent: 3325309 (1967-06-01), Sutula et al.
patent: 3839899 (1974-10-01), McMillen
patent: 4380930 (1983-04-01), Podhrasky et al.

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