Patent ID: 9441462
Filing Date: 2016-09-13
CPC Classification: B29C,B29K,B29L,B82Y,C08J,E21B

Claim Text:
1. A downhole filter comprising: an open cell foam; and nanoparticles disposed in the open cell foam and exposed within pores of the open cell foam, the nanoparticles being derivatized with a functional group including carboxy, epoxy, ether, ketone, amine, hydroxy, alkoxy, alkyl, aryl, aralkyl, alkaryl, lactone, functionalized polymeric or oligomeric groups, or a combination comprising at least one of the forgoing functional groups, and the functional group of the nanoparticles being selected such that the downhole filter selectively transmits polar or non-polar fluids; wherein the pores are open cells forming flow channels through the open cell foam and the size of the nanoparticles is selected such that the size of the pores of the open cell foam is about 0.75 μm to about 1000 μm.