Stable breaker-crosslinker-polymer complex and method of use...

Details Stable breaker-crosslinker-polymer complex and method of use... Stable breaker-crosslinker-polymer complex and method of use...

E - Fixed Constructions

21

B

E21B 43/22 (2006.01) C09K 8/68 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2203349

A preferred novel breaker-crosslinker-polymer complex and a method for using the complex in a fracturing fluid to fracture a subterranean formation that surrounds a well bore by pumping the fluid to a desired location within the well bore under sufficient pressure to fracture the surrounding subterranean formation. The complex may be maintained in a substantially non--reactive state by maintaining specific conditions of pH and temperature, until a time at which the fluid is in place in the well bore and the desired fracture is completed. Once the fracture is completed, the specific conditions at which the complex is inactive are no longer maintained. When the conditions change sufficiently, the complex becomes active and the breaker begins to catalyze polymer degradation causing the fracturing fluid to become sufficiently fluid to be pumped from the subterranean formation to the well surface.

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