Wells – Processes – Placing fluid into the formation
Patent
1989-10-17
1991-03-05
Suchfield, George A.
Wells
Processes
Placing fluid into the formation
134 41, 166242, 166902, 252 8553, 252 8555, 25238953, 427239, E21B 4102, E21B 4327
Patent
active
049970402
ABSTRACT:
An acid soluble mercury metal salt intensifier is provided to inhibit corrosion in conjunction with a corrosion inhibitor when a steel surface is present in an acid environment. The mercury metal salt may be a mercuric halide, such as mercuric chloride or may be a mercuric acetate, mercuric oxide, mercuric nitrate or mixtures of all of these. An acid soluble copper metal salt, such as cuprous halide, for example, cuprous chloride, copper acetate, cupric formate, cuprous nitrate and mixtures thereof, may also be present as a co-intensifier. In one application, the mercuric salt intensifier is used in a fluid for treatment of a subterranean well for the acid enhancement of production within the well by introduction of the fluid through a high alloy steel conduit positioned within the well. Methods of inhibiting acidic corrosion when steel surfaces are in an acid environment, particularly steel surfaces containing chrome, and methods of treating a subterranean well for enhanced production are also presented.
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Baker Hughes Incorporated
Suchfield George A.
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