Well fluid and method of servicing a well
AssigneeBaker Hughes Incorporated
InventorsJinguo Zhang, Paul H. Javora, Jacob Gibson
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Abstract
A well servicing fluid for reducing polymer degradation is disclosed. The well servicing fluid is formulated with components comprising: at least one free radical scavenger, with the proviso that the free radical scavenger is not erythorbate, lignin or lignin derivatives; at least one polymer and an aqueous based solvent. Methods for servicing a well employing well servicing fluids of the present disclosure are also disclosed.
Claims49
A well servicing fluid for reducing polymer degradation, the well servicing fluid formulated with components comprising:
- at least one free radical scavenger, with the proviso that the free radical scavenger is not erythorbate, lignin or lignin derivatives;
- at least one polymer;
- and
- an aqueous based solvent.
A method of servicing a well with a well servicing fluid having reduced polymer degradation, the method comprising:
- providing a well servicing fluid formulated with components comprising at least one free radical scavenger, at least one polymer, and an aqueous based solvent;
- and
- introducing the well servicing fluid into the well,
- wherein the free radical scavenger results in reduced degradation of the polymer compared to the degradation that would occur for the same well servicing fluid without the free radical scavenger at the same temperature, and
- with the proviso that the free radical scavenger is not erythorbate, lignin or lignin derivatives.
The method of 27, wherein the at least one free radical scavenger is methyl ether hydroquinone.
The method of 27, wherein the at least one free radical scavenger is chosen from gallic acid, or methyl gallate.
The method of 27, wherein the at least one free radical scavenger is melatonin.
The method of 27, wherein the well servicing fluid further comprises erythorbate.
The method of 27, wherein the at least one polymer is a polysaccharide.
The method of 27, wherein the aqueous based solvent is a brine having a density of about 8.4 pounds per gallon or more.
The method of 27, wherein the at least one polymer is chosen from viscosifying polymers, fluid loss control polymers, or polymers to control fluid friction flow
A method of servicing a well with a well servicing fluid having reduced polymer degradation, the method comprising:
- providing a well servicing fluid formulated with components comprising at least one free radical scavenger chosen from melatonin, butylated hydroxytoluene, gallic acid or salts or esters thereof, lignin, lignin derivatives or hydroquinones, at least one polymer, and an aqueous based solvent;
- and
- introducing the well servicing fluid into the well,
- wherein the free radical scavenger results in reduced degradation of the polymer compared to the degradation that would occur for the same well servicing fluid without the free radical scavenger at the same temperature, and
- with the proviso that the well servicing fluid is not a clay-based fluid employed as a drilling fluid.
A well servicing fluid for reducing polymer degradation, the well servicing fluid formulated with components comprising:
- at least one free radical scavenger, wherein the free radical scavenger is not erythorbate;
- at least one polymer;
- and
- an aqueous based solvent,
- with the proviso that the well servicing fluid does not comprise clay in a concentration that is effective for significantly altering the viscosity of the well servicing fluid.
Dependencies are inferred from the claim text.