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US 8,377,855 B2Granted
Methods and compositions for treating subterranean zones
AssigneeHalliburton Energy Services, Inc.
InventorsKeith A. Frost, Bradley L. Todd, Richard W. Pauls, Ian Robb
Life of this patent
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Abstract
Methods and compositions for breaking treatment fluids utilized in the stimulation of a subterranean formation.
Claims19
A treating fluid composition comprising:
- water, a viscosity increasing polymer and a water-soluble strongly delayed polymer breaker composition, comprising a hydrogen peroxide source, a ferrous ion source and a chelating agent, wherein the water soluble, strongly delayed polymer breaker composition comprises a molar ratio of the chelating agent to the ferrous ion source of from 3:1 to 6:1.
A treating fluid composition comprising:
- water and a water-soluble strongly delayed polymer breaker composition, comprising a hydrogen peroxide source, a ferrous ion source and a chelating agent, wherein the water soluble, strongly delayed polymer breaker composition comprises a molar ratio of the chelating agent to the ferrous ion source of from 3:1 to 6:1.
Dependencies are inferred from the claim text.