Patent ID: 8393417
Filing Date: 2013-03-12
Classification: E21B,Y10T

Abstract:
1. A sleeve comprising: a first end and a second end with a longitudinal passageway extending through the sleeve between the first end and the second end; a plurality of blades disposed on an exterior surface of the sleeve; the blades spaced from each other to form respective fluid flow paths disposed between adjacent blades, the respective fluid flow paths operable to communicate a fluid in a generally uphole direction; each blade having an exterior surface spaced radially from adjacent portions of the sleeve; a respective pad formed on the exterior surface of the at least one blade adjacent to an uphole portion of the at least one blade; each respective pad having an enlarged exterior surface as compared with the adjacent exterior surface of the associated blade; at least one blade having at least one channel extending through the blade; the channel operable to communicate with fluid flow paths disposed adjacent to the at least one blade at least one supporting structure disposed in the channel extending through the at least one blade; and each supporting structure extending between the interior surface of the at least one blade and adjacent portions of the exterior surface of the sleeve.