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US 6,550,556 B2Granted
Ultra hard material cutter with shaped cutting surface
AssigneeSmith International, Inc.
InventorsStewart Middlemiss, Ronald K. Eyre
Life of this patent
Estimating the term…
Abstract
A cutting layer is provided having a radially extending depression formed on the exposed surface of the cutting element's cutting layer. A corresponding depression may be formed on the substrate end surface below the depression formed on the cutting layer. Furthermore, secondary shallower depressions may be formed on the cutting layer. The cutting element is typically mounted in a drag bit such that the cutting layer radially extending depression makes contact with the earth formations.
Claims42
A cutting element comprising:
- a substrate having an interface surface and a substrate periphery;
- a substrate depression formed on the interface surface extending radially outward to the substrate periphery;
- an ultra hard material layer coupled to the interface surface and having an exposed surface and an ultra hard material layer periphery;
- and
- an ultra hard material layer depression formed on the exposed surface and extending radially outward along the exposed surface to the periphery of the ultra hard material layer, wherein the ultra hard material depression is aligned over the substrate depression.
2 more elements
A cutting element comprising:
- a substrate having an interface surface and a substrate periphery;
- an ultra hard material layer coupled to the interface surface and having an exposed surface and an ultra hard material layer periphery;
- and
- an ultra hard material layer depression formed on the exposed surface and extending radially outward to the periphery of the ultra hard material layer;
- and
- a plurality of secondary depressions formed abutting and surrounding said radially extending depression wherein each of said secondary depressions is abutting another one of said secondary depressions, and wherein the radially extending depression has a maximum depth and wherein each secondary depression has a maximum depth shallower than the maximum depth of the radially extending depression.
3 more elements
A cutting element comprising:
- a substrate;
- a transition layer formed over the substrate, the transition layer having a periphery and an interface surface;
- a transition layer depression formed on the interface surface extending radially outward to the periphery;
- an ultra hard material layer formed over the transition layer and having an exposed surface and an ultra hard material layer periphery;
- and
- an ultra hard material layer depression formed on the exposed surface and extending radially outward to the periphery of the ultra hard material layer.
3 more elements
A drag bit comprising a plurality of cutting elements, each cutting element comprising:
- a substrate having an interface surface and a substrate periphery;
- a substrate depression formed on the interface surface extending radially outward to the substrate periphery;
- an ultra hard material layer coupled to the interface surface and having an exposed surface and an ultra hard material layer periphery;
- and
- an ultra hard material layer depression formed on the exposed surface and extending radially outward along the exposed surface to the periphery of the ultra hard material layer, wherein the ultra hard material depression is aligned over the substrate depression.
2 more elements
A cutting element comprising:
- a substrate having an interface surface and a substrate periphery;
- a substrate depression formed on the interface surface extending to the substrate periphery;
- an ultra hard material layer coupled to the interface surface and having an exposed surface and an ultra hard material layer periphery;
- and
- an ultra hard material layer depression formed on the exposed surface and extending along the exposed surface to the periphery of the ultra hard material layer, wherein the ultra hard material depression is aligned over the substrate depression.
2 more elements
A cutting element comprising:
- a substrate having an interface surface and a substrate periphery;
- a substrate depression formed on the interface surface extending to the substrate periphery;
- an ultra hard material layer coupled to the interface surface and having an a first surface opposite a second surface and an ultra hard material layer periphery, wherein the second surface is further from the interface surface than the first surface;
- and
- an ultra hard material layer depression formed on the second surface and extending along the second surface to the periphery of the ultra hard material layer, wherein the ultra hard material depression is aligned over the substrate depression.
2 more elements
Dependencies are inferred from the claim text.