Filter cake removal fluid and method

Details Filter cake removal fluid and method Filter cake removal fluid and method

2005-05-03

2005-05-03

Walker, Zakiya (Department: 3672)

Wells

Processes

Cleaning or unloading well

C166S300000, C166S304000, C166S307000

Reexamination Certificate

active

06886635

ABSTRACT:
A method for removing filter cake from a subterranean borehole comprising drilling the borehole with a drilling fluid that includes additives to form a filter cake having an oxidation-degradable component, preferably a polysaccharide. The filter cake is contacted with a clear brine containing a mixture of a persulfate salt in a variable density brine to degrade the polymers within the filter cake. The persulfate mixture breaks down the filter cake in well bores having temperatures ranging from about 65° F. to 165° F. Concentration of the persulfate sets the pace of the reaction.

REFERENCES:
patent: 4250044 (1981-02-01), Hinkel
patent: 4594170 (1986-06-01), Brown et al.
patent: 4809783 (1989-03-01), Hollenbeck et al.
patent: 5164099 (1992-11-01), Gupta et al.
patent: 5253711 (1993-10-01), Mondshine
patent: 5373901 (1994-12-01), Norman et al.
patent: 6138760 (2000-10-01), Lopez et al.
patent: 6140277 (2000-10-01), Tibbles et al.
patent: 6143698 (2000-11-01), Murphey et al.
patent: 6357527 (2002-03-01), Norman et al.
patent: 20020036088 (2002-03-01), Todd
Syed Ali, et al., Oil & Gas Journal, Feb. 1, 1999, Alternative methods clean up filter cake.
Brad Todd, et al., Halliburton Best Practices Series, AADE 2001, Delayed Breakers for Horizontal Well Cleanup.

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