Mill and pump-off sub

Details Mill and pump-off sub Mill and pump-off sub

E - Fixed Constructions

21

B

E21B 29/00 (2006.01) E21B 10/46 (2006.01) E21B 21/00 (2006.01) E21B 29/06 (2006.01) E21B 31/00 (2006.01) E21B 31/16 (2006.01)

Patent

CA 2552031

A downhole mill includes a plurality of cutters extending generally radially from a center region to a gage diameter, wherein the plurality of cutters includes a first serrated cutter blade having a plurality of peaks and valleys along its length. The plurality of cutters includes a second serrated cutter blade having a plurality of peaks and valleys along its length. The plurality of cutters includes a non-serrated cutter blade positioned upon the cutting face between the first serrated cutter blade and the second serrated cutter blade, wherein the peaks of the first serrated cutter blade is radially aligned with the valleys of the second serrated cutter blade. A pump-off sub configured to release a downhole mill includes a dovetail connection maintained by a c-ring in an expanded state.

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