DRILL BIT CUTTER HAVING SHAPED CUTTING ELEMENT

• US 20180148978A1
• Filed: 06/18/2015
• Published: 05/31/2018
• Est. Priority Date: 06/18/2015
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Chen, Shilin
• Granted Patent: US 10,526,850 B2
• Time in Patent Office: Days
• CPC Class Codes: E21B 10/55 with preformed cutting elements
• CPC Class Codes: E21B 10/5673 having a non planar or non circular cutting face
• CPC Class Codes: E21B 10/5735 Interface between the substrate and the cutting element

Abstract

A drill bit cutter having a shaped cutting element is disclosed. The cutter includes a substrate having a fixed portion, and a rotating portion rotatably attached to the fixed portion. The cutter also includes a cutting element secured to the rotating portion of the substrate, the cutting element having a non-circular cross-section in a plane perpendicular to a cutter axis of the rotating cutting element, the cross-section having a radially symmetric shape.

Claims

1. A cutter for a drill bit, comprising:

a substrate for rotatably coupling to a body of the drill bit; and

a shaped cutting element secured to the substrate, the shaped cutting element having a radially symmetric, non-circular cross-section in a plane perpendicular to an axis of rotation of the substrate.

2. The cutter of claim 1, further comprising a base portion for fixing to the body of the drill bit, wherein the substrate is rotatably secured to the base portion.

3. The cutter of claim 2, wherein the base portion comprises a substrate material for bonding to the body of the drill bit.

4. The cutter of claim 3, wherein the base portion comprising the substrate material and the substrate rotatably secured to the base portion are generally aligned and have the same cross-sectional shape in a plane perpendicular to the axis of rotation of the substrate.

5. The cutter of claim 4, wherein:

the base portion further comprises a recess, the substrate positioned within the recess of the base portion; and

wherein the cutter further comprises a retainer rotatably securing the rotating portion of the substrate in the recess of the portion of the substrate.

6. The cutter of claim 1, the cross-section of the shaped cutting element having a regular polygonal shape.

7. The cutter of claim 1, the cross-section of the shaped cutting element having a concave shape including a plurality of teeth, each of the plurality of teeth having a circular shape.

8. A drill bit comprising:

a bit body;

a blade on an exterior portion of the bit body;

a rotating cutter on the blade and including;

a substrate for rotatably coupling to a body of the drill bit; and

a shaped cutting element secured to the substrate, the shaped cutting element having a radially symmetric, non-circular cross-section in a plane perpendicular to an axis of rotation of the substrate.

9. The drill bit of claim 8, the rotating cutter further comprising a base portion for fixing to the body of the drill bit, wherein the substrate is rotatably secured to the base portion.

10. The drill bit of claim 9, wherein the base portion comprises a substrate material for bonding to the body of the drill bit.

11. The drill bit of claim 10, wherein the base portion comprising the substrate material and the substrate rotatably secured to the base portion are generally aligned and have the same cross-sectional shape in a plane perpendicular to the axis of rotation of the substrate.

12. The drill bit of claim 11, wherein the base portion further comprises a recess, the substrate positioned within the recess of the base portion;

and wherein the cutter further comprises a retainer rotatably securing the rotating portion of the substrate in the recess of the portion of the substrate.

13. The drill bit of claim 8, the cross-section of the shaped cutting element having a regular polygonal shape.

14. The drill bit of claim 8, the cross-section of the shaped cutting element having a concave shape including a plurality of teeth, each of the plurality of teeth having a circular shape.

15. A drill bit comprising:

a bit body;

a blade on an exterior portion of the bit body;

a first cutter coupled to the blade and including;

a first substrate coupled to the blade; and

a first cutting element on the substrate, the first cutting element having a radially symmetric, non-circular cross-section in a plane perpendicular to a cutter axis of the first cutter.

16. The drill bit of claim 15, the first cutter located on a cone zone of the blade.

17. The drill bit of claim 15, further comprising a second cutter on the blade, the second cutter including:

a second substrate fixed to the blade; and

a second cutting element on the second substrate, the second cutting element having a circular cross-section about a cutter axis of the second cutter.

18. The drill bit of claim 15, the cross section having a regular polygonal shape.

19. The drill bit of claim 15, the cross section having a concave shape including a plurality of teeth.

20. The drill bit of claim 19, the plurality of teeth having a circular shape.