Precured coated particulate material

Details Precured coated particulate material Precured coated particulate material

E - Fixed Constructions

21

B

57/13, 117/48, 3

E21B 43/267 (2006.01) B01J 2/00 (2006.01) C09K 8/80 (2006.01) E21B 43/04 (2006.01)

Patent

CA 1279534

ABSTRACT OF THE DISCLOSURE The present invention relates to coated particulate matter wherein the particles are individually coated with a cured combination of phenolic/furan resin or furan resin to form a precured resin coating on a proppant such as sand, thereby substantially improving the chemical resistance of the proppant over one having a straight phenolic precured coating. Another embodiment of this invention involves the use of multiple resin coatings on the particulate matter to form a final layered coating containing the desired amount of cured resin. This multiple coating of particulate material results in a final coated product that has a smoother and more uniform surface than particulate material having its entire resin coating applied in a single operation. 26-14

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