E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 29/06 (2006.01) B23C 3/00 (2006.01) B23C 5/00 (2006.01) E21B 7/08 (2006.01)
Patent
CA 2606907
A mill assembly includes a shaft; a lead mill secured to a first end of the shaft, the lead mill including a first body having a plurality of first blades and a plurality of first cutters having substantially cylindrical bodies secured to the plurality of first blades; and a second mill secured to the shaft a selected distance from the lead mill, the second mill including a second body having a plurality of second blades and a plurality of second cutters having substantially cylindrical bodies secured to the plurality of blades.
Patil Harshad
Perschke Malcolm
Smart & Biggar
Smith International Inc.
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