Patent ID: 7244693
Filing Date: 2007-07-17
Classification: C09K,Y10S

Abstract:
1. A method for the treatment of a hydrocarbon well, which method comprises administering, down said well, polymeric particles impregnated with a well treatment chemical or precursor or generator thereof, wherein said particles have a pore volume of at least 20%, and are prepared by a process which comprises: (A) preparing an aqueous dispersion of polymer particles containing from 0.05 to 10 times by volume, based on the polymer, of one or more first material(s) having a water-solubility of <10 (B) adding a partly water soluble second material, having a water-solubility of at least ten times that of said first material(s), under conditions which prevent or hinder transport of said first material(s) through the aqueous phase, whereby said second material diffuses into the polymer particles swelled with said first material(s) and increases the volume of said particles by from 20 to 1000 times, based on the polymer.