Dual cutting mill

Details Dual cutting mill Dual cutting mill

E - Fixed Constructions

21

B

E21B 11/00 (2006.01) E21B 10/08 (2006.01) E21B 29/00 (2006.01)

Patent

CA 2324705

A rotating tool for milling or drilling in a well bore, having one or more rotating cutting structures, with each cutting structure rotating about its own axis, and with the cutting structures rotating about the axis of the tool. The rotational axis of the tool is offset from the axis of at least one cutting structure, with the axis of the tool passing through that cutting structure. This ensures that the cutting structure which spans the axis of the tool rotates independently of the tool, to prevent the existence of a zero velocity point on the cutting face of the tool.

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