Resin coated proppants with antimicrobial additives
AssigneeAgienic, Inc.
InventorsAnoop Agrawal, Donald R. Uhlmann, Nicholas R. Krasnow
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Abstract
Proppants are used in oil and gas extraction, particularly in fracking operations. The invention relates to resin coated proppants. The coatings on proppants have antimicrobial materials incorporated within these coatings. The antimicrobially active agents are incorporated in a concentration less than 20% by weight of the coatings or the active agent from these coatings can be released from these coatings in the environment of the proppants.
Claims22
An oil field proppant comprising frac sand or an aluminum oxide-containing particulate wherein said proppant is coated with a polymeric coating containing an antimicrobial material wherein the weight percent of the antimicrobial material is about 0.1 to 20% as compared to the weight of said polymeric coating so that the polymeric coating releases the antimicrobial material or a component of the antimicrobial material with antimicrobial properties under conditions present in an oil well, thereby providing antimicrobial activity in the well.
A method of providing antimicrobial activity in an oil well, the method comprising:
- supplying a proppant particle comprising a frac sand or an aluminum oxide-containing particulate into the oil well, wherein the proppant is coated with a polymeric coating containing an antimicrobial material, wherein the antimicrobial material is about 0.1 to 20 wt. % as compared to the weight of said coating, whereby the antimicrobial material or a component of the antimicrobial material with antimicrobial properties is released under the conditions present in the oil well, thereby providing antimicrobial activity in the well.
A method of forming oil-field proppant particles coated with a polymeric coating containing an antimicrobial material, the method comprising:
- a) mixing said antimicrobial material with a polymeric coating formulation to form a polymeric coating mixture, wherein the antimicrobial material is about 0.1 to 20 wt. % as compared to the weight of said polymeric coating;
- b) coating said polymeric coating mixture onto the oil-field proppant particles;
- and
- c) drying or curing the polymeric coating mixture, such that said oil-field proppant particles are able to release antimicrobial material or a component of the antimicrobial material with antimicrobial properties under conditions present in an oil well.
A method of providing antimicrobial activity in an oil well, the method comprising supplying a proppant particle with a specific gravity of less than about 4 g/cm3 that is coated with a polymeric coating containing an antimicrobial material into the oil well,
- wherein the antimicrobial material is about 0.1 to 20 wt. % as compared to the weight of said polymeric coating, and
- wherein the antimicrobial material or a component of the antimicrobial material with antimicrobial properties is released under the conditions present in the oil well, thereby providing antimicrobial activity in the oil well.
Dependencies are inferred from the claim text.