US 11,739,248 B2
Temporary blockage of fluid boundary between higher and lower fluid conductivity formations
Nick Koster, Ellisville, MO (US)
Assigned to DPIP, LLC, Ellisville, MO (US)
Appl. No. 17/270,682
Filed by DPIP, LLC, Ellisville, MO (US)
PCT Filed Aug. 26, 2019, PCT No. PCT/US2019/048130
§ 371(c)(1), (2) Date Feb. 23, 2021,
PCT Pub. No. WO2020/041790, PCT Pub. Date Feb. 27, 2020.
Claims priority of provisional application 62/722,721, filed on Aug. 24, 2018.
Prior Publication US 2021/0340426 A1, Nov. 4, 2021
Int. Cl. C09K 8/516 (2006.01); C09K 8/502 (2006.01); C09K 8/565 (2006.01); E21B 33/13 (2006.01); E21B 37/06 (2006.01); E21B 37/08 (2006.01); E21B 47/06 (2012.01)
CPC C09K 8/502 (2013.01) [C09K 8/516 (2013.01); C09K 8/565 (2013.01); E21B 33/13 (2013.01); E21B 37/06 (2013.01); E21B 37/08 (2013.01); E21B 47/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A composition for temporarily blocking fluid flow between conductivity zones comprising:
a plurality of particles having at least one measurable dimension between 2 and 1,000 μm, wherein the particle comprises a core and a protective coating material surrounding the core, wherein the core comprises a polymer selected from polycaprolactone (PCL), poly (lactic-co-glycolic acid) (PLGA), and poly-lactic acid (PLA), and pores that reduce the particles' density, and the coating material comprises silica; and
a solvent comprising one or more of toluene, xylene, hexane, and benzene.