Cutting elements for rotary drill bits
AssigneeCamco International (UK) Limited
InventorNigel Dennis Griffin
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Abstract
A cutting element for a rotary drag-type drill bit comprises a body of polycrystalline diamond incorporating a binder-catalyst selected from iron group elements, such as iron, cobalt and nickel, or alloys thereof. The body of polycrystalline diamond is unsupported by an integral substrate. The cutting element may be mounted directly on the body of the drill bit, or may be brazed to a substrate of a different, less hard material which is in turn mounted on the drill bit.
Claims13
A cutting element for a rotary drag-type drill bit comprising a body of polycrystalline diamond incorporating a binder-catalyst selected from iron group elements or alloys thereof, said body being brazed to a substrate by use of a brazing alloy wherein the substrate comprises a body of diamond/tungsten carbide/binder-catalyst composite material.
A cutting element for a rotary drag-type drill bit comprising a body of polycrystalline diamond incorporating a binder-catalyst selected from iron group elements or alloys thereof, said body being brazed to a substrate by use of a brazing wherein the substrate comprises a body of diamond/tungsten carbide/binder-catalyst composite material and a body of cemented tungsten carbide brazed together by use of a brazing alloy.
Dependencies are inferred from the claim text.