US 11,884,875 B2
Asphaltene dispersants
Rachael Cole, Sandnes (NO); Astrid Lone, Sandnes (NO); Neil David Feasey, Southampton (GB); and Tore Nordvik, Sandnes (NO)
Assigned to Cameron International Corporation, Houston, TX (US)
Appl. No. 17/618,263
Filed by Cameron International Corporation, Houston, TX (US)
PCT Filed Jun. 22, 2020, PCT No. PCT/US2020/038871
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2020/257747, PCT Pub. Date Dec. 24, 2020.
Claims priority of provisional application 62/864,658, filed on Jun. 21, 2019.
Prior Publication US 2022/0306927 A1, Sep. 29, 2022
Int. Cl. C09K 8/524 (2006.01); C09K 8/536 (2006.01)
CPC C09K 8/524 (2013.01) [C09K 8/536 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A composition comprising:
an asphaltene dispersant being a product of a reaction of a polyethyleneimine (PEI) dendrimer and one or more derivatizing reagents selected from the group consisting of fatty acids and aromatic acids, wherein the polyethyleneimine dendrimer has a weight average molecular weight of greater than or equal to 9 kDa, and wherein the asphaltene dispersant has a solubility in xylene of greater than or equal to 5%.
 
12. A method comprising:
emplacing in a wellbore a composition comprising an asphaltene dispersant, wherein the asphaltene dispersant is a product of a reaction of a polyethyleneimine (PEI) dendrimer and one or more derivatizing reagents selected from the group consisting of fatty acids and aromatic acids, wherein the polyethyleneimine dendrimer has a weight average molecular weight of greater than or equal to 9 kDa, and wherein the asphaltene dispersant has a solubility in xylene of greater than or equal to 5%.