Gas well treatment compositions and methods
April 17, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re32302 3572440 Formation fracturing with stable foam Method of treating subterranean formations utilizing foamed viscous fluids Multipurpose aqueous foamer Reducing sludging during oil well acidizing Remedial treatment for coal degas wells Reducing sludging during oil well acidizing Well treatment compositions and method Well acidizing compositions and method Patent #: 5034140 InventorsAssigneeApplicationNo. 870546 filed on 04/17/1992US Classes:166/307, Attacking formation166/305.1, Placing fluid into the formation166/308.6, Foam (EPO)166/309, Producing foam or gas in well by foaming or gas producing material507/923Fracture acidizingExaminersPrimary: Suchfield, George A.Attorney, Agent or FirmInternational ClassesE21B 043/22E21B 043/26 E21B 043/27 AbstractAn additive for addition to conventional well treatment fluids to enhance the ability of the fluids to be recovered from subterranean formations, to generate a foam in association with the fluids and/or to enhance the ability of the fluids to remove water and other connate fluids interlocked with gas in the formations. The additive includes about 25% to about 50% by volume of a microemulsion generating component which forms an acid and/or water external microemulsion when added to the treatment fluid, and about 50% to about 75% by volume of a foaming agent component. The foaming agent component includes at least one nonionic surface active agent having an HLB of from 12 to 22. The additive is particularly suitable for addition to foam fracturing fluids useful for stimulating tight or otherwise unconventional gas formations. Also provided are a gas well treatment composition employing the inventive additive and a method of treating a subterranean formation in which the inventive composition is employed. |
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