US 12,404,439 B2
Extended release asphaltene inhibitor composition
Ross Tomson, Sugar Land, TX (US); Paula Guraieb, Sugar Land, TX (US); Kristin Powell, Sugar Land, TX (US); and Rangana Jayawickramage, Sugar Land, TX (US)
Assigned to CHAMPIONX LLC, Sugar Land, TX (US)
Appl. No. 18/550,515
Filed by CHAMPIONX LLC, Sugar Land, TX (US)
PCT Filed Mar. 28, 2022, PCT No. PCT/IB2022/052856
§ 371(c)(1), (2) Date Sep. 14, 2023,
PCT Pub. No. WO2022/208322, PCT Pub. Date Oct. 6, 2022.
Claims priority of provisional application 63/167,445, filed on Mar. 29, 2021.
Prior Publication US 2024/0059948 A1, Feb. 22, 2024
Int. Cl. C09K 8/03 (2006.01); B82Y 30/00 (2011.01); B82Y 99/00 (2011.01); C09K 8/04 (2006.01); E21B 43/22 (2006.01)
CPC C09K 8/03 (2013.01) [C09K 8/04 (2013.01); B82Y 30/00 (2013.01); B82Y 99/00 (2013.01); C09K 2208/10 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A nanoparticle comprising a carrier material and an asphaltene inhibitor, wherein the asphaltene inhibitor is releasable from the carrier material,
wherein the nanoparticle has a core-shell structure comprising the asphaltene inhibitor and a porous shell comprising the carrier material,
wherein the nanoparticle has a diameter of 250 nm to 350 nm, the thickness of the shell is 50 nm to 150 nm, and at least 90 wt. % of the core, based on the total weight of the core, comprises the asphaltene inhibitor, and
wherein the shell comprises the asphaltene inhibitor on at least a portion of the shell surface and in the pores of the shell.