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AssigneeCabot Corporation
InventorsWilliam J. Benton, Neal F. Magri, James R. VonKrosigk, Michael T. Pelletier
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An aqueous-based composition containing cesium formate and at least one chelating agent is described. Methods of removing scaling deposits, which may include alkaline earth metal sulfates, present on surfaces, including porous media, such as alkaline earth metal sulfate buildup in a well bore, is also described, wherein the method includes contacting the alkaline earth metal sulfate with the compositions of the present invention to remove the scaling deposits. A completion fluid containing at least one alkali metal formate, at least one acid and/or at least one chelating agent, and optionally at least one surfactant or mutual solvent is also described. Methods of removing a filter cake from a well bore surface, which may include weighting agents such as calcium carbonate, is also described, wherein the method includes contacting the filter cake with the completion fluid of the present invention.
An aqueous-based composition comprising cesium formate and at least one chelating agent.
A method to remove scaling deposits present on a well bore surface comprising contacting said scaling deposits with an aqueous-based composition comprising at least one alkali metal formate and at least one chelating agent, wherein said composition is introduced while recovery of hydrocarbons is occurring from said well bore.
A completion fluid comprising at least one alkali metal formate and at least one acid or chelating agent or both and optionally containing at least one surfactant or mutual solvent, or both.
A spent completion fluid comprising at least one alkali metal formate, at least one acid or chelating agent or both, and a dissolved or solubilized filter cake, and optionally, at least one surfactant or mutual solvent, or both.
Dependencies are inferred from the claim text.