Methods and fluid compositions for depositing and removing...

Details Methods and fluid compositions for depositing and removing... Methods and fluid compositions for depositing and removing...

2006-01-10

2006-01-10

Kreck, John (Department: 3673)

Wells

Processes

Specific low fluid loss feature for fluid attacking formation

C166S312000, C166S278000

Reexamination Certificate

active

06983798

ABSTRACT:
The current invention provides methods of using and drilling and servicing fluid compositions for depositing and removing filter cake from the walls of a well bore. The compositions make use of particulate solid bridging agent comprised of a salt of an organic acid. The bridging particles are dissolvable by a clean-up solution comprised of a mild solvent that is less corrosive than the conventional strong mineral acids used for this purpose.

REFERENCES:
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patent: 5728652 (1998-03-01), Dobson et al.
patent: 6422314 (2002-07-01), Todd et al.
patent: 2001/0036905 (2001-11-01), Parlar et al.
patent: 1 178 099 (2002-02-01), None
patent: 1 223 207 (2002-07-01), None
Foreign Search Report and Opinion (PCT /GB2004/000685), Jun. 15, 2004.

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