Patent ID: 6780804
Filing Date: 2004-08-24
Classification: C04B,C09K,Y10S

Abstract:
A method of forming a proppant mixture comprising:combining a particulate material with a liquid to form a mixture; forming the mixture into spherical pellets; screening the pellets; and firing the pellets to provide a proppant mixture with a size distribution in which: 0-25% wt. % of the pellets have a diameter of from 1.0-1.18 mm; 20-38 wt. % of the pellets have a diameter of from 0.85-1.0 mm; 20-38 wt. % of the pellets have a diameter of from 0.71-0.85 mm; and 15-35 wt. % of the pellets have a diameter of from 0.60-0.71 mm.