Cutting element with wear resistant crown

Details Cutting element with wear resistant crown Cutting element with wear resistant crown

B - Operations, Transporting

22

F

255/69

B22F 7/06 (2006.01) B21K 5/02 (2006.01) E21B 10/56 (2006.01)

Patent

CA 1288416

Abstract of the Disclosure A cutting element adapted to be used in a rotary drill bit is made by positioning in an appropriately shaped die cavity a quantity of a mixture of tungsten carbide and 4 to 11 percent cobalt in the shape of a crown for defining an outer surface for a tip portion of the cutting element using a pressure of less than about 600 pounds per square inch; positioning in the cavity a quantity of a mixture of tungsten carbide and 12 to 17 percent cobalt sufficient to form almost all of a base portion and at least an inner part of the tip portion for the cutting element; pressing the two quantities of the mixtures together and into the die at pressures in the range of about 10 to 15 tons per square inch; and sintering the pressed insert to form the cutting element.

543227

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