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US 7,135,231 B1Granted
Process for incremental coating of proppants for hydraulic fracturing and proppants produced therefrom
AssigneeFairmont Minerals, Ltd.
InventorsA. Richard Sinclair, Syed Akbar, Patrick R. Okell
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Abstract
A high strength composite particle comprised of a series of incrementally applied resin microlayer coatings such that each of the microlayer partial coatings are interleaved with each other is described. Methods of making the composite particles, as well as methods of using such particles as a proppant in oil and gas well hydraulic fracturing are also described.
Claims7
A coated proppant produced according to a process comprising the steps:
- heating a proppant to a temperature between about 200° F. and 800° F.;
- applying a coupling agent onto the surface of the proppant;
- sputtering a resin coat onto at least a portion of the surface of the proppant;
- and
- sputtering a number n of additional resin coats onto the proppant in an incremental manner, such that the resultant coated particle has a plurality of interleaved partial resin coats fully coating the proppant.
2 more elements
A high strength, incrementally coated proppant comprising:
- a particulate substrate;
- and
- a number n of incremental partial resin coats covering the substrate by interleafing layers.
Dependencies are inferred from the claim text.