Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Patent
1992-10-21
1994-12-13
Geist, Gary
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
166308, 536114, 507903, 507922, E21B 4326
Patent
active
053727320
ABSTRACT:
Disclosed herein is a delayed crosslinking agent. This crosslinking agent contains a borate source and a water-soluble polysaccharide. Suggested borate sources include borax, boric acid, and sodium tetraborate. Guar gum, carboxymethylhydroxypropylguar, and hydroxypropylguar are recommended water-soluble polysaccharides. The borate source is present in an amount of from about 5 to about 30% percent by weight, calculated as B.sub.2 O.sub.3, of the water-soluble polysaccharide.
These delayed crosslinking agents are transported to the well site and admixed with an aqueous solution containing additional water-soluble polysaccharide. The delayed crosslinking agents re-equilibrate in the aqueous solution of the water-soluble polysaccharide. The resulting compositions are useful as fracturing fluids.
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Harris Phillip C.
Heath Stanley J.
Geist Gary
Halliburton Company
Kent Robert A.
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