Method and materials for hydaulic fracturing of wells
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United States of America Patent
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Jan 13, 2009
Grant Date -
Dec 8, 2005
app pub date -
Aug 5, 2005
filing date -
Sep 26, 2001
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Abstract
Hydraulic fracturing of wells by injecting a degradable polymer phase as a fracturing fluid is provided. Composition and degree of polymerization of the degradable polymer and the selection of additives may be varied to adjust the viscosity, degradation time and other properties of the fracturing fluid. Viscous degradable fluid or pellets of degradable polymer may be placed in a wellbore as an internal phase in a low viscosity carrier fluid. A polymer-continuous liquid phase may be formed at a selected location in the wellbore, usually near perforations, before the polymer phase is pressured into a formation to form a hydraulic fracture.
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