US 12,140,582 B2
Multifunctional polysaccharide-based mud logging barcode tracers
Wei Wang, Quincy, MA (US); Sehoon Chang, Boston, MA (US); and Hooisweng Ow, Woburn, MA (US)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Nov. 9, 2021, as Appl. No. 17/522,445.
Prior Publication US 2023/0148198 A1, May 11, 2023
Int. Cl. G01N 33/24 (2006.01); G01N 21/64 (2006.01)
CPC G01N 33/24 (2013.01) [G01N 21/64 (2013.01); Y10T 436/13 (2015.01)] 15 Claims
OG exemplary drawing
 
1. A nanoparticle tag, comprising:
a natural polysaccharide;
a fluorescent dye;
superparamagnetic nanoparticles; and
a polymer shell, wherein the polymer shell comprises a derivative of phenyl methacrylate, hexyl methacrylate, or butyl methacrylate, or any combination thereof, and wherein the polymer shell encapsulates the natural polysaccharide, the fluorescent dye, and the superparamagnetic nanoparticles.