Method of cleaning a down hole casing string

Details Method of cleaning a down hole casing string Method of cleaning a down hole casing string

1998-08-13

1999-09-07

Bagnell, David J.

Wells

Processes

Cleaning or unloading well

151042, 166173, E21B 3700, B08B 902

Patent

active

059472030

ABSTRACT:
A method of cleaning the casing string comprises lowering the drill string with a cleaning apparatus thereon. The cleaning apparatus includes a mandrel, a wire brush member located in an opening in the mandrel, a spring, and a centralizer. The method includes urging the wire brush member against the inner diameter of the casing string and cleaning the inner diameter of the work string. Also, the casing string may have a highly deviated section so that a low side and a high side of the casing string is created. The method includes lifting the apparatus from the low side the inner diameter of the casing string with the centralizer and urging the wire brush member against the low side and the high side of the casing string with the spring.

REFERENCES:
patent: 2682069 (1954-06-01), Scriminger
patent: 3032114 (1962-05-01), Best
patent: 3824646 (1974-07-01), Jai
patent: 3827492 (1974-08-01), Hammon et al.
patent: 4438812 (1984-03-01), Hammon
patent: 4501322 (1985-02-01), Martin
patent: 4503578 (1985-03-01), McIntyre
patent: 5419397 (1995-05-01), Reynolds
patent: 5711046 (1998-01-01), Potter
patent: 5819353 (1998-10-01), Armell et al.

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