US 11,912,938 B2
Coated proppants and methods of making and use thereof
Wengang Li, Dhahran (SA); Edreese Alsharaeh, Riyadh (SA); and Mohan Raj Krishnan, Riyadh (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA); and Alfaisal University, Riyadh (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA); and Alfaisal University, Riyadh (SA)
Filed on May 24, 2023, as Appl. No. 18/322,668.
Application 18/322,668 is a division of application No. 17/395,981, filed on Aug. 6, 2021, granted, now 11,702,587.
Prior Publication US 2023/0313027 A1, Oct. 5, 2023
Int. Cl. C09K 8/80 (2006.01)
CPC C09K 8/805 (2013.01) [C09K 2208/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of preparing a coated proppant, the method comprising:
preparing a first mixture comprising a polymerizable material, an initiator, and a crosslinker comprising divinyl benzene;
contacting the first mixture to a proppant particle to form a polymerization mixture;
heating the polymerization mixture to cure the polymerizable material and form a polymer-coated proppant particle comprising the proppant particle and a surface copolymer layer crosslinked via divinyl benzene;
preparing a second mixture comprising the polymer-coated substrate and an uncured resin; and
adding a curing agent to the second mixture to cure the uncured resin and form the coated proppant, the coated proppant comprising the proppant particle, the surface copolymer layer surrounding the proppant particle, and a resin layer surrounding the surface copolymer layer, the resin layer comprising a cured resin, and wherein:
the surface copolymer layer has an interpenetrating 3D-crosslinked polymer network structure surrounding the proppant particle;
the coated proppant has a fine production of from 0.1% to 10% at a closure stress of 10,000 psi.