Foamed gel completion, workover, and kill fluid
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 ReferencesMethod for controlling permeability of subterranean formations Shear thickening well control fluid Method of treating subterranean formations utilizing foamed viscous fluids Aqueous drilling and packer fluids Conformance improvement in a subterranean hydrocarbon-bearing formation using a polymer gel Polymers for use as filtration control aids in drilling muds Oil base drilling fluid composition Kill fluid for oil field operations Lost circulation fluid for oil field drilling operations Well kill treatment for oil field wellbore operations InventorAssigneeApplicationNo. 570178 filed on 12/07/1995US Classes:166/292, Using specific materials166/309Producing foam or gas in well by foaming or gas producing materialExaminersPrimary: Schoeppel, Roger J.Attorney, Agent or FirmForeign Patent References
International ClassE21B 033/13AbstractA process employing a foamed gel in a wellbore as a completion, workover, or kill fluid. The foamed gel is formed from an aqueous solvent, a water-soluble carboxylate-containing polymer crosslinked by a crosslinking agent containing a reactive transition metal cation, a surfactant, and an added gas. The foamed gel is placed in the wellbore, where it substantially prevents the flow of formation fluid into or out of the wellbore. The completion, workover, or kill operation is then performed. Alternatively, the foamed gel may be combined with another completion, workover, or kill fluid after commencing a wellbore operation.Other References
Field of SearchMaterial placed in pores of formation to treat resident fluid flowing into wellFluid flow causes pellet to block opening in wall of conduit Cementing, plugging or consolidating Using specific materials Cement or consolidating material contains inorganic water settable and organic ingredients Cement or consolidating material is organic or has organic ingredient Producing foam or gas in well by foaming or gas producing material | |
