Wells – Processes – With indicating – testing – measuring or locating
Patent
1989-01-23
1990-10-09
Stoll, Robert L.
Wells
Processes
With indicating, testing, measuring or locating
166308, 252 8551, E21B 4326
Patent
active
049614665
ABSTRACT:
A controllable breaker for use in viscosified fluids utilized in the treatment of subterranean formations comprising a low molecular weight condensation product of hydroxyacetic acid with up to 15 wt % cocondensing compounds containing other hydroxy-, carboxylic-acid, or hydroxycarboxylic-acid moieties. The condensation product has an average molecular weight in the range of from about 200 to about 4000, a generally crystalline structure, a melting point above about 100.degree. C. and is substantially insoluble in the viscosified fluid at ambient temperatures. The breaker is admixed with the viscosified fluid in an amount sufficient to effect controlled breaking of the fluid upon being heated to a temperature above 70.degree. F. within a subterranean formation.
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Himes Ronald E.
Knox John A.
Geist Gary L.
Halliburton Company
Kent Robert A.
Stoll Robert L.
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