Method of treating subterranean formations with carboxylated...

Details Method of treating subterranean formations with carboxylated... Method of treating subterranean formations with carboxylated...

2009-07-17

2011-10-04

Kugel, Timothy J. (Department: 1763)

Earth boring, well treating, and oil field chemistry

Well treating

Contains organic component

C507S217000, C507S922000, C166S305100, C166S308400

Reexamination Certificate

active

08030250

ABSTRACT:
The production of hydrocarbons from a subterranean formation is enhanced by use of a well treatment fluid which contains a carboxylated guar which may be prepared by reacting a guar source and a derivatizing agent of the formula X(CH2)nCOOH or alkali salts thereof, wherein X is selected from the group consisting of —OSO2CH3; —OSO2C2H5; —OTs, —Br, and —I and n is between from 1 to 4. The intrinsic viscosity of the carboxylated guar in 2% KCl at 27° C. is at least 750 mL/g and the degree of substitution (DS) of the carboxylated guar is typically between from about 0.02 to about 0.15.

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