Patent ID: 9290687
Filing Date: 2016-03-22
CPC Classification: C09K

Claim Text:
1. A loss circulation material for introduction into a drilling fluid, the material comprising a mixture of crumbled pellet particles of a plurality of grades, the crumbled pellet particles consisting essentially of wood fiber and moisture without an additional binder material, wherein each of said crumbled pellet particles comprises a particle diameter, further wherein said plurality of grades comprises a coarse particle grade, a medium particle grade, and a fine particle grade, wherein said particle diameter of said crumbled pellet particles of said coarse particle grade is greater than 0.0394 inches, further wherein said particle diameter of said crumbled pellet particles of said medium particle grade is between 0.0098 inches and 0.0394 inches, further wherein said particle diameter of said crumbled pellet particles of said fine particle grade is between 0.0029 inches and 0.0098 inches, wherein the crumbled pellet particles have a specific gravity greater than 1.0, and further wherein the crumbled pellet particles remain substantially integral when introduced into the drilling fluid.