Compositions and methods for treatment of well bore tar
AssigneeHalliburton Energy Services, Inc.
InventorGregory P. Perez
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Abstract
Of the many compositions and methods provided herein, one method includes a method comprising: contacting tar resident in a well bore with a treatment fluid comprising a styrene-acrylate polymer; and allowing the styrene-acrylate polymer to interact with the tar to at least partially reduce the tendency of the tar to adhere to a surface. Another method provided herein includes a method for treating tar sand comprising: contacting the tar sand with a treatment fluid comprising an aqueous fluid and a styrene-acrylate polymer, the tar sand comprising tar and sand; and allowing the styrene-acrylate polymers to interact with the tar to at least partially separate the tar from the sand.
Claims14
A drilling fluid comprising:
- an aqueous base fluid,
- a latex emulsion comprising a nonionic copolymer consisting of:
- styrene or a substituted styrene, and methacrylate, wherein the nonionic copolymer is present in an amount in the range of from about 1% to about 10% by volume of the drilling fluid, and
- well bore tar that is not emulsified, wherein the nonionic copolymer coats or encapsulates the well bore tar such that the well bore tar is less tacky.
A drilling fluid comprising:
- an aqueous base fluid,
- a latex emulsion comprising a nonionic copolymer consisting of:
- styrene or a substituted styrene, and methacrylate, wherein the nonionic copolymer is present in an amount in the range of from about 1% to about 10% by volume of the drilling fluid
- a weighting agent, and
- well bore tar that is not emulsified, wherein the nonionic copolymer coats or encapsulates the well bore tar such that the well bore tar is less tacky.
A drilling fluid comprising:
- an aqueous base fluid,
- a latex emulsion comprising a nonionic copolymer consisting:
- of styrene or a substituted styrene, and methacrylate, wherein the nonionic copolymer is present in an amount in the range of about 1% to about 10% by volume of the aqueous treatment fluid,
- a surfactant,
- a viscosifying agent, and
- well bore tar, wherein the nonionic copolymer coats or encapsulates the well bore tar such that the well bore tar is less tacky,
- wherein the composition has a density in a range of from about 12 pounds per gallon to about 18 pounds per gallon.
Dependencies are inferred from the claim text.