Polymer enhanced foam workover, completion, and kill fluids
December 7, 2015. 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 Re32114 3530940 3637021 Composition and method for drilling a reservoir containing a high temperature aqueous liquid Viscosity-stabilized aqueous solutions Method for controlling permeability of subterranean formations Shear thickening well control fluid Highly stable alcohol foams and methods of forming and using such foams Stabilized aqueous foam systems and concentrate and method for making them Aqueous drilling and packer fluids InventorAssigneeApplicationNo. 568869 filed on 12/07/1995US Classes:166/294, Cement or consolidating material is organic or has organic ingredient166/309, Producing foam or gas in well by foaming or gas producing material507/202, Contains intended gaseous phase at entry into wellbore507/213, Polysaccharide is a xanthan (e.g., scleroglucans, etc.)507/215, Carboxyalkylcellulose (e.g., CMC, CMHEC, etc.)507/216, Hydroxyalkylcellulose (e.g., HEC, etc.)507/259, The sulfur is part of a sulfonate group507/925COMPLETION OR WORKOVER FLUIDExaminersPrimary: Suchfield, George A.Attorney, Agent or FirmInternational ClassesE21B 021/00E21B 033/13 E21B 043/00 AbstractPolymer enhanced foam fluid is utilized for completion, workover, and kill operations in wells penetrating subterranean formations. The foam is formed by appropriately adding a gas to an aqueous solution of a substantially noncrosslinked water soluble polymer and a surfactant. The solution and the foam are substantially free of crosslinking agents. The foam may be generated at the surface or in a wellbore.Other References
Field of SearchGraveling or filter formingWith piston separator Cement or consolidating material is organic or has organic ingredient Organic material is resin or resinous Producing foam or gas in well by foaming or gas producing material Liquid introduced from well top Contains intended gaseous phase at entry into wellbore Carbohydrate is polysaccharide Polysaccharide is a xanthan (e.g., scleroglucans, etc.) Carboxyalkylcellulose (e.g., CMC, CMHEC, etc.) Hydroxyalkylcellulose (e.g., HEC, etc.) Nitrogen is attached directly or indirectly to the acrylic acid monomer or derivative by nonionic bonding (e.g., acrylamide, acrylonitrile, etc.) The sulfur is part of a sulfonate group COMPLETION OR WORKOVER FLUID PACKER FLUID WELL CLEANING FLUID Spacing slug or preflush fluid |
| ||||||||||||||
