Methods for treating a well using a treatment fluid...

Details Methods for treating a well using a treatment fluid... Methods for treating a well using a treatment fluid...

2009-05-20

2010-12-07

Kugel, Timothy J. (Department: 1796)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C166S305100, C507S213000, C507S239000, C507S244000, C507S268000, C507S269000, C507S277000

Reexamination Certificate

active

07846877

ABSTRACT:
Methods are provided for treating a portion of a well and include the steps of: (a) forming a treatment fluid comprising an aqueous solution, wherein the aqueous solution comprises: (i) water; (ii) a water-soluble polysaccharide; (iii) one or more water-soluble salts, wherein the one or more salts are selected and are in at least a sufficient concentration such that the water-salt solution has a density of at least 10 ppg; and (iv) urea; and (b) introducing the treatment fluid into the portion of the well. According to the inventions, the concentration of the urea in the water is in at least a sufficient concentration such that aqueous solution: (1) has a G′ of at least 2 Pa, or (2) is filterable. According to the inventions, an identical aqueous solution except with less than the sufficient concentration of the urea would not satisfy the above conditions.

REFERENCES:
patent: 2006/0157248 (2006-07-01), Hoefer et al.

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