E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/08 (2006.01) E21B 7/06 (2006.01) E21B 29/06 (2006.01)
Patent
CA 2200938
A whipstock for guiding a cutting tool within a cased borehole. The whipstock having a guide surface for guiding engagement with the cutting tool. The guide surface having a first taper with the axis of the whipstock and a greater taper with the axis of the whipstock at the point that the center of the cutting tool reaches the inside diameter of the wall of the casing thereby more quickly moving the center point of the cutting tool across the wall of the casing.
Nairn Gregory S.
Swearingen Bruce D.
Deeth Williams Wall Llp
Smith International Inc.
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