Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2008-05-27
2008-05-27
Gulakowski, Randy (Department: 1796)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C507S129000, C507S135000, C507S136000, C507S240000, C507S241000, C507S252000, C507S260000, C507S261000, C507S267000, C507S922000, C166S308200
Reexamination Certificate
active
07378378
ABSTRACT:
A method for increasing the rate of shear rehealing of fluids made with cationic, zwitterionic, and amphoteric viscoelastic surfactant fluid systems by adding an effective amount of a rheology enhancer package containing, for example a polyethylene glycol-polypropylene glycol block copolymer and a polynaphthalene sulfonate. The rheology enhancer package allows viscoelastic surfactant fluids to be used at lower viscoelastic surfactant concentrations in certain applications, for example certain oilfield treatments, for example fracturing and gravel packing. Preferred surfactants are betaines and quaternary amines.
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Chen Yiyan
Colaco Allwyn
Dahanayake Manilal
Lee Jesse C.
Li Fang
Cate David
Figueroa John J
Fonseca Darla
Gulakowski Randy
Nava Robin
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