Patent ID: 9157281
Filing Date: 2015-10-13
Classification: E21B

Abstract:
1. A downhole tool comprising a main body having: (a) a longitudinal axis; (b) an outer surface; and (c) a plurality of channels formed into said outer surface, said channels dividing the main body into a plurality of blade sections corresponding in number to the number of channels; wherein each of at least two of the blade sections has one or more cartridge pockets formed into the outer surface thereof, each cartridge pocket being configured to receive a tool cartridge having a cylindrical inner surface for housing a tool insert having a cylindrical side surface portion complementary to the cylindrical inner surface, the cylindrical side surface portion having a centroidal axis, such that the tool insert is confined to rotate, by the cylindrical inner surface, about a rotational axis transverse to, and offset from, the longitudinal axis of the main body, the rotational axis being coincident with the centroidal axis of the cylindrical side surface portion of the tool insert.