Cutting elements having non-planar surfaces and tools incorporating the same
US-2019071933-A1 · Mar 7, 2019 · US
Cutting elements with reduced variable back rake angle
US12011773B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12011773-B2 |
| Application number | US-202117331358-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 26, 2021 |
| Priority date | May 27, 2020 |
| Publication date | Jun 18, 2024 |
| Grant date | Jun 18, 2024 |
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- Title
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Abstract
Official abstract text for this publication.
A drill bit for cutting formation comprises a bit body, a plurality of cutters, and a plurality of blades with pockets to accommodate the cutters, respectively. In an embodiment, the plurality of cutters comprise a substrate, an ultra-hard layer, a concave surface on the top of the ultra-hard layer, wherein the concave surface comprises a plurality of planar and curved surfaces.
First claim
Opening claim text (preview).
What is claimed is: 1. A cutter comprising: a substrate; an ultra-hard layer; a concave surface on top of the ultra-hard layer; and a chamfer extending from a periphery of the concave surface to a cutting edge at a side wall of the ultra-hard layer; and wherein the concave surface comprises a first flat surface, a second flat surface, a curved surface, and a third flat surface arranged radially in order from a cutting point to an opposite edge of the cutting point around a periphery of the concave surface. 2. The cutter of claim 1 , wherein the first flat surface has a tilted angle α, the second flat surface has a tilted angle β, and angle β is larger than angle α. 3. The cutter of claim 2 , wherein the third flat surface is parallel to a bottom surface of the cutter or has a tilted angle γ. 4. The cutter of claim 1 , wherein the ultra-hard layer is formed of polycrystalline diamond, cubic boron nitride, or other ultra-hard materials. 5. The cutter of claim 1 , wherein the concave surface is machined by electrical discharge machining methods, machined by laser processing, machined by grinding, machined by other material reduction methods, or net shaped from a sintering process. 6. A drill bit comprising at least one cutter of claim 1 . 7. A cutter comprising a substrate; an ultra-hard laver; and a concave surface on top of the ultra-hard laver; wherein the concave surface comprises a first flat surface, a first curved surface, a second curved surface, and a second flat surface arranged in order from a cutting point to an opposite edge of the cutting point around a periphery of the concave surface. 8. A cutter comprising a substrate; an ultra-hard laver; and a concave surface on top of the ultra-hard laver; wherein the ultra-hard layer comprises two cutting points on opposite sides around a periphery of the concave surface, where the concave surface comprises a first flat surface and a second flat surface on two sides of the cutting points, a third flat surface at the center of the concave surface, and a curved surface between the first flat surface and the second flat surface and the flat surface at the center of the concave surface. 9. The cutter of claim 8 , wherein the first flat surface and the second flat surface are slanted downwards to the periphery of the concave surface.
Assignees
Inventors
Classifications
- B23C5/202Primary
Plate-like cutting inserts with special form (special form related to securing of the insert B23C5/22) · CPC title
having a non planar or non circular cutting face · CPC title
curved · CPC title
Curved cutting edges · CPC title
characterised by conduits or nozzles for drilling fluids (for roller bits E21B10/18; for percussion drill bits E21B10/38) · CPC title
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Frequently asked questions
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- What does patent US12011773B2 cover?
- A drill bit for cutting formation comprises a bit body, a plurality of cutters, and a plurality of blades with pockets to accommodate the cutters, respectively. In an embodiment, the plurality of cutters comprise a substrate, an ultra-hard layer, a concave surface on the top of the ultra-hard layer, wherein the concave surface comprises a plurality of planar and curved surfaces.
- Who is the assignee on this patent?
- Cnpc Usa Corp, Beijing Huamei Inc
- What technology area does this patent fall under?
- Primary CPC classification B23C5/202. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 18 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).