Polycrystalline diamond cutter with improved geometry for cooling and cutting evacuation and efficiency and durability

Patent metadata

Field	Value
Publication number	US-2020340303-A1
Application number	US-202016927569-A
Country	US
Kind code	A1
Filing date	Jul 13, 2020
Priority date	Aug 27, 2015
Publication date	Oct 29, 2020
Grant date	—

Abstract

The present disclosure provides non-planar cutting tooth and a diamond drill bit. The non-planar cutting tooth comprises a base, a table connected to a top of the base. a concave shaped surface on the center portion of a top surface of the table; three cutting ridges with each extending from a vertex of the concave shaped surface to an outer edge of the top surface; three cutting bevels with each locating between two cutting ridges of the three cutting ridges; each of the three cutting ridges has a fillet.

First claim

What is claimed is:

1 . A cutting tooth comprising
a base; a table connected to a top of the base; a concave shaped surface on the center portion of a top surface of the table; three cutting ridges with each extending from a vertex of the concave shaped surface to an outer edge of the top surface; three cutting bevels with each locating between two cutting ridges of the three cutting ridges; wherein each of the three cutting ridges has a fillet.

2 . The cutting tooth of claim 1 , wherein the fillet has a round surface.

3 . The cutting tooth of claim 1 , wherein a top surface of the fillet is flat.

4 . The cutting tooth of claim 1 , wherein an interface between the base and the table is a plane.

5 . The cutting tooth of claim 1 , wherein an interface between the base and the table is a curved surface.

6 . The cutting tooth of claim 5 , wherein the table comprises three tips projecting into the base.

7 . The cutting tooth of claim 6 , wherein the three tips are below the three cutting ridges respectively.

8 . The cutting tooth of claim 1 , wherein the concave shaped surface is a conical depression.

9 . The cutting tooth of claim 8 , wherein an outer perimeter of the conical depression is a Reuleaux triangle.

10 . The cutting tooth of claim 8 , wherein an outer perimeter of the conical depression is a space curve through an intersection of a cone and a tetrahedron.

11 . The cutting tooth of claim 1 , wherein the concave shaped surface is an inverted tetrahedron.

12 . The cutting tooth of claim 1 , wherein the concave shaped surface is a tetrahedron frustum.

13 . The cutting tooth of claim 1 , wherein the concave shaped surface is a curved cone or a dome.

14 . The cutting tooth of claim 1 , wherein the concave shaped surface has a raised portion at the bottom thereof.

15 . The cutting tooth of claim 14 , wherein the raised portion has a depression at the center portion thereof.

16 . The cutting tooth of claim 1 , wherein the length of each of the cutting ridges is the same or different.

17 . The cutting tooth of claim 1 , further comprising a chamfer on the top of the table.

18 . The cutting tooth of claim 1 , wherein the base is made of tungsten carbide material.

19 . The cutting tooth of claim 1 , wherein the table is made of polycrystalline diamond.

20 . A drill bit comprising at least one cutting tooth of claim 1 .

Assignees

• Cnpc Usa Corp
• Beijing Huamei Inc

Inventors

• Cheng Chris
• Liu Hongtao
• Davila Javier
• Wang Xu
• Wang Yuxin
• Yang Zhenzhou
• Yang Xiongwen

Classifications

• E21B10/42 Primary

  Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits (characterised by wear resisting parts E21B10/46; by conduits or nozzles for drilling fluid E21B10/60; by detachable or adjustable parts E21B10/62) · CPC title

• E21B10/5673 Primary

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