Colloidal and colloidal-like systems in aqueous, clay-based fluids
First Claim
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1. A fluid composition for downhole use in a well, comprising:
- an aqueous liquid as the continuous phase;
one or more surfactants;
aphrons; and
one or more viscosifiers selected from the group of palygorskite-sepiolite clay family members consisting of palygorskite, tuperssuatsiaite, yofortierite, kalifersite, sepiolite, falcondoite, loughlinite and mixtures thereof, wherein the composition has a pH of from about 7 to about 12.
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Abstract
The present invention generally relates to improved clay-based compositions comprising colloidal or colloidal-like phases (e.g., emulsions, aphrons) and methods of using those compositions. The compositions generally comprise an aqueous continuous phase, one or more palygorskite-sepiolite group clays, one or more surfactants, aphrons and optionally one or more Aphron Stabilizers. The compositions of the present invention are capable of being used in high-pressure applications.
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Citations
43 Claims
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1. A fluid composition for downhole use in a well, comprising:
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an aqueous liquid as the continuous phase; one or more surfactants; aphrons; and one or more viscosifiers selected from the group of palygorskite-sepiolite clay family members consisting of palygorskite, tuperssuatsiaite, yofortierite, kalifersite, sepiolite, falcondoite, loughlinite and mixtures thereof, wherein the composition has a pH of from about 7 to about 12. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A fluid composition for downhole use in a well, comprising:
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an aqueous liquid as the continuous phase; one or more surfactants; aphrons; and one or more viscosifiers selected from the group of palygorskite-sepiolite clay family members consisting of palygorskite, tuperssuatsiaite, yofortierite, kalifersite, sepiolite, falcondoite, loughlinite and mixtures thereof, wherein the composition can be continuously recirculated. - View Dependent Claims (12, 13, 14)
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15. A process for drilling or servicing a wellbore in a subtenanean formation wherein a drilling or servicing fluid is circulated in the wellbore, comprising:
utilizing as the drilling or servicing fluid an aqueous liquid as the continuous phase, one or more surfactants, aphrons, and one or more viscosifiers selected from the group of palygorskite-sepiolite clay family members consisting of, palygorskite, tuperssuatsiaite, yofortierite, kalifersite, sepiolite, falcondoite, loughlinite and mixtures thereof. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A fluid composition for downhole use in a well, comprising:
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an aqueous liquid as the continuous phase; one or more surfactants; aphrons; one or more aphron stabilizers; and one or more viscosifiers selected from the group of palygorskite-sepiolite clay family members consisting of, palygorskite, tuperssuatsiaite, yofortierite, kalifersite, sepiolite, falcondoite, loughlinite and mixtures thereof. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification