Wells – Processes – Providing porous mass of adhered filter material in well
Patent
1989-09-22
1991-09-17
Suchfield, George A.
Wells
Processes
Providing porous mass of adhered filter material in well
166280, 166281, 166295, 428407, 523131, E21B 4304, E21B 43267
Patent
active
050486080
ABSTRACT:
A composition and method for consolidating proppant or gravel for propping fractures about, or for gravel packs for sand control in, wells in subterranean formations characterized by an improvement in which there is used a urethane quasi prepolymer consisting of dipropylene glycol and excess polymeric methylene diphenylene diisocyanate in a diluent, allowing to stand to form oligomers of polyurethane chains and admixing the urethane quasi prepolymer and diluent with a proppant and oil-based frac fluid and admixing a catalyst with the admixture of proppant and prepolymer and allowing to stand in the fractures, or well, until consolidation occurs. Also disclosed are specific examples of satisfactory frac fluids, diluents and catalysts and appropriate procedures for consolidation in one- or two-passes.
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Raghavan Durai N.
Wiser-Halladay Robin
Atlantic Richfield Company
Fails James C.
Mantooth Geoffrey A.
Suchfield George A.
Zobal Arthur F.
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