Cutting element with non-planar cutting edges

Patent metadata

Field	Value
Publication number	US-11365589-B2
Application number	US-202016918842-A
Country	US
Kind code	B2
Filing date	Jul 1, 2020
Priority date	Jul 3, 2019
Publication date	Jun 21, 2022
Grant date	Jun 21, 2022

Abstract

A cutting element comprising a cylindrical substrate; a table bonded to the cylindrical substrate; at least one tooth with a reduced projected cutting area on a periphery of the table; and a plurality of undulating cutting ridges on a top of the table. The table can have a working surface and at least one lateral surface, and a chamfer formed therebetween. The working surface can be a non-planar working surface. For a given weight on the bit, the cutter will sink into the rock deeper which can lead to better stability and more effective rock removal.

First claim

What is claimed is:

1. A cutting element comprising
a cylindrical substrate;
a table bonded to the cylindrical substrate;
at least two teeth with each having a reduced projected cutting area on a periphery of the table;
a non-planar working surface including a plurality of regional surfaces on the top of table;
at least two recessions formed into the periphery of the table, with each of the at least two teeth being formed in between two recessions of the at least two recessions;
wherein the working surface includes a plurality of first ridges each connecting a center of the working surface and a symmetric center of a periphery of each of the at least two teeth, a plurality of second ridges with each connecting the center of the working surface and a symmetric center of a periphery between two adjacent teeth of the at least two teeth, and
wherein an angle between the two adjacent regional surfaces intersecting at one of the plurality second ridges is in a range from 180.5 to 260 degrees.

2. The cutting element of claim 1 , wherein the at least two recessions are located around a circumference of the table and extend down along a depth of the table.

3. The cutting element of claim 1 , wherein the at least one tooth is rounded, or sharp.

4. The cutting element of claim 1 , wherein the number of the at least two teeth is in the range of 2-20.

5. The cutting element of claim 1 , further comprising at least one lateral surface, and a chamfer formed between the at least one lateral surface and the working surface.

6. The cutting element of claim 5 , wherein an angle between the lateral surface and the chamfer is 30-60 degrees.

7. The cutting element of claim 1 , wherein a center of the non-planar working surface is higher than or equal to an edge of the non-planar working surface.

8. The cutting element of claim 1 , wherein at least one of the first ridges from among the plurality of first ridges is a straight line connecting the center of the non-planar working surface and the symmetric center of a tooth.

9. The cutting element of claim 1 , wherein each of the plurality of regional surfaces is a planar or a curved structure.

10. The cutting element of claim 9 , wherein an angle between the two adjacent regional surfaces intersecting at the first ridge is in a range from 100 to 179.5 degrees.

11. The cutting element of claim 1 , wherein at least one of the second ridges from among the plurality of second ridges is a straight line connecting the center of the non-planar working surface and the symmetric center of the periphery between two adjacent teeth of the at least two teeth.

12. The cutting element of claim 1 , wherein a radius of the each of the at least two teeth is less than a radius of the cutting element.

Assignees

• Cnpc Usa Corp
• Beijing Huamei Inc
• China Nat Petroleum Corp

Inventors

• Cheng Chris
• Yu Jiaqing
• Wang Xu
• Yang Xiongwen
• Liu Yu

Classifications

• E21B10/5673 Primary

  having a non planar or non circular cutting face · CPC title

• E21B10/55

  with preformed cutting elements · CPC title