Crosslinking delaying agents for acid fluids

Details Crosslinking delaying agents for acid fluids Crosslinking delaying agents for acid fluids

E - Fixed Constructions

21

B

E21B 33/138 (2006.01) E21B 43/26 (2006.01) E21B 43/27 (2006.01)

Patent

CA 2455249

Fluids comprising an aqueous acid, synthetic polymer, metal crosslinking agent and lactic acid or a salt thereof have particular applicability in fracturing subterranean formations of an oil or gas well. The lactic acid acts as a delaying agent. As a result, crosslinking of the synthetic polymer and metal crosslinking agent typically occurs at a temperature of 100° F. or higher.

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