Cutting element with non-planar cutting edges

Patent metadata

Field	Value
Publication number	US-2021002962-A1
Application number	US-202016918842-A
Country	US
Kind code	A1
Filing date	Jul 1, 2020
Priority date	Jul 3, 2019
Publication date	Jan 7, 2021
Grant date	—

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 one tooth with a reduced projected cutting area on a periphery of the table; and a plurality of undulating cutting ridges on the top of the table.

2 . The cutting element of claim 1 , further comprising at least two recessions formed into the periphery of the table, wherein each of the at least one tooth is formed in between two recessions of the at least two recessions.

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

4 . The cutting element of claim 2 , wherein the at least one tooth is rounded, sharp, or serrated.

5 . The cutting element of claim 2 , wherein the number of the at least one tooth is in the range of 1-20.

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

7 . The cutting element of claim 2 , wherein the at least two recessions are formed into an outer circumference of the table, wherein the at least two recessions begin at a working surface, extend perpendicular to the working surface, and slope gradually toward a lateral surface.

8 . The cutting element of claim 7 , wherein an angle between the lateral surface and the chamfer is about 30-60 degrees.

9 . The cutting element of claim 7 , wherein the working surface is a non-planar working surface.

10 . The cutting element of claim 9 , wherein the non-planar working surface includes a plurality of regional surfaces.

11 . The cutting element of claim 9 , wherein a center of the non-planar working surface is higher than or equal to an edge of the non-planar working surface.

12 . The cutting element of claim 10 , wherein the number of the plurality of regional surfaces is equal to that of the at least two recessions.

13 . The cutting element of claim 12 , wherein the non-planar working surface includes a first ridge between two adjacent regional surfaces.

14 . The cutting element of claim 13 , wherein the first ridge is a straight or curved line connecting the center of the non-planar working surface and a symmetric center of a tooth.

15 . The cutting element of claim 13 , wherein each of the two adjacent regional surfaces is a planar or a curved structure.

16 . The cutting element of claim 15 , wherein an angle between the two adjacent regional surfaces intersecting at the first ridge is in a range from 100 to 179.5 degrees.

17 . The cutting element of claim 16 , wherein the regional surface includes a second ridge.

18 . The cutting element of claim 17 , wherein the second ridge is a straight or curved line connecting the center of the working surface and the symmetric center of an adjacent tooth.

19 . The cutting element of claim 18 , wherein an angle between the two adjacent regional surfaces intersecting at the second ridge is in a range from 180.5 to 260 degrees.

20 . The cutting element of claim 1 , wherein a radius of the at least one tooth is in a range of 10%-100% of a radius of the cutting element.

Assignees

• Cnpc Usa Corp
• Beijing Huamei Inc

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