Patent ID: 7998907
Filing Date: 2011-08-16
Classification: C09K,E21B,Y10T

Abstract:
1. A selectively configured porous particulate material comprising: a porous particulate material, a chemical treatment applied to the porous particulate material, and a fluid encapsulated or entrapped within the pores of the porous particulate material; wherein the encapsulated or entrapped fluid has an apparent specific gravity (ASG) lower than the ASG of the porous particulate material and the ASG of the chemical treatment; wherein the porous particulate material is selected from the group consisting of polyolefins, styrene-divinylbenzene copolymers and polyalkylacrylate esters; wherein the selectively configured porous particulate material exhibits crush resistance under a closure stress of from about 250 to 10,000 psi and has an ASG less than or equal to 2.4; and wherein the selectively configured porous particulate is capable of maintaining said ASG when employed in well treatment compositions.