Well treatment fluid compositions and methods for their use

Details Well treatment fluid compositions and methods for their use Well treatment fluid compositions and methods for their use

2006-01-10

2006-01-10

Kreck, John (Department: 3673)

Wells

Processes

Chemical inter-reaction of two or more introduced materials

C166S308400, C507S211000, C507S267000

Reexamination Certificate

active

06983801

ABSTRACT:
A well treatment fluid composition comprises a solvent (such as water), a polymer soluble or hydratable in the solvent, a crosslinking agent, an inorganic breaking agent, and an ester compound. Preferably, the hydratable polymer is a polysaccharide, such as galactomannan, cellulose, or derivatives thereof. The crosslinking agent is preferably a borate, titanate, or zirconium-containing compound. The inorganic breaking agent is preferably a metal-based oxidizing agent, such as an alkaline earth metal or transition metal-based oxidizing agent. The ester compound is preferably an ester of polycarboxylic acid, such as an ester of oxalate, citrate, or ethylenediamine tetraacetate. One example of a suitable ester compound is acetyl triethyl citrate.

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