Polysaccharide Containing Well Treatment Compositions and Methods of Using Same
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United States of America Patent
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Issued Date -
Jun 11, 2009
app pub date -
Dec 7, 2007
filing date -
Dec 7, 2007
priority date (Note) -
Abandoned
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Abstract
Loss of wellbore fluids (such as drilling fluids, completion fluids and workover fluids) into the flow passages of a subterranean formation during well drilling, cementing, completion and workover operations may be reduced or eliminated by introducing into the wellbore in communication with the formation a suspension of a polysaccharide in a aqueous fluid. The aqueous fluid contains water and a delayed viscosification material or agent. Hydration of the polysaccharide may be delayed until after introduction of the composition into the formation. A fluid-impermeable barrier is thereby formed.
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