Solid PCD cutter

Patent metadata

Field	Value
Publication number	US-9482056-B2
Application number	US-201213719326-A
Country	US
Kind code	B2
Filing date	Dec 19, 2012
Priority date	Dec 30, 2011
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

A cutting element may be formed by placing a plurality of diamond particles adjacent to a substrate in a reaction cell and subjecting the plurality of diamond particles to high pressure high temperature conditions to form a polycrystalline diamond body. The polycrystalline diamond body may have a cutting face area to thickness ratio ranging from 60:16 to 500:5 and at least one dimension greater than 8 mm.

First claim

What is claimed is:

1. A cutting element comprising a polycrystalline diamond body, wherein the polycrystalline diamond body comprises:
a cutting face;
a thickness of the polycrystalline body extending from the cutting face; and
a cutting face area to thickness ratio ranging from 60:16 to 500:5;
wherein the thickness of the polycrystalline body is greater than or equal to 8 mm and less than or equal to 16 mm.

2. The cutting element of claim 1 , wherein the cutting face has a diameter greater than or equal to 8 mm.

3. The cutting element of claim 1 , further comprising a substrate.

4. The cutting element of claim 3 , wherein the substrate comprises a first region adjacent to the diamond body and at least one additional region adjacent to the first region opposite from the diamond body, wherein the first region comprises hard particles having a smaller median grain size than hard particles of the at least one additional region.

5. The cutting element of claim 3 , wherein the substrate comprises a first region adjacent to the diamond body and a second region, wherein the first region comprises carbide particles ranging in size from about 2 microns to 3 microns, and wherein the second region ranges in size from about 4 microns to about 6 microns.

6. The cutting element of claim 1 , wherein the diamond body comprises thermally stable polycrystalline diamond.

7. The cutting element of claim 1 , wherein at least one acid infusion pathway is formed in the diamond body.

8. The cutting element of claim 1 , wherein the polycrystalline diamond body comprises boron additive.

9. The cutting element of claim 1 , wherein the polycrystalline diamond body has a bulk thermal conductivity of greater than 200 W/mK.

10. The cutting element of claim 1 , wherein the polycrystalline diamond body comprises a plurality of bonded together diamond grains and a carbonate solvent catalyst.

11. The cutting element of claim 1 , wherein the polycrystalline diamond body comprises a diamond gradient.

12. A drill bit, comprising:
a bit body having a rotational axis extending there through;
at least one cutter pocket formed in the drill bit; and
at least one cutting element positioned in the at least one cutter pocket, wherein the at least one cutting element comprises a polycrystalline diamond body, and wherein the polycrystalline diamond body comprises:
a cutting face;
a thickness of the polycrystalline diamond body extending from the cutting face to a distance within the cutter pocket; and
a cutting face area to thickness ratio ranging from 60:16 to 500:5;
wherein the thickness of the polycrystalline diamond body is greater than or equal to 8 mm and less than or equal to 16 mm; and
wherein the at least one cutting element is positioned in the at least one cutter pocket such that the cutting face faces in the direction of rotation of the drill bit.

13. The drill bit of claim 12 , wherein the at least one cutting element is fixed within the at least one cutter pocket.

14. The cutting element of claim 12 , wherein the at least one cutting element is rotatably mounted to the at least one cutter pocket.

15. A drill bit, comprising:
a bit body having a rotational axis extending there through;
at least one cutter pocket formed in the drill bit; and
at least one cutting element positioned in the at least one cutter pocket, wherein the at least one cutting element comprises a polycrystalline diamond body having a thickness greater than or equal to 8 mm and less than or equal to 16 mm and has a bulk thermal conductivity of greater than 100 W/mK;
wherein the at least one cutting element is positioned in the at least one cutter pocket such that the cutting face faces in the direction of rotation of the drill bit.

16. The drill bit of claim 15 , wherein the polycrystalline diamond body has a bulk thermal conductivity of greater than 200 W/mK.

17. The drill bit of claim 15 , wherein the at least one cutting element is fixed within the at least one cutter pocket.

18. The drill bit of claim 15 , wherein the at least one cutting element is rotatably mounted to the at least one cutter pocket.

Assignees

• Smith International

Inventors

• Eyre Ronald K
• Belnap John Daniel
• Zhang Youhe
• Shen Yuelin
• Shi Jibin
• Burhan Yuri

Classifications

• E21B10/46 Primary

  characterised by wear resisting parts, e.g. diamond inserts · CPC title

• C22C26/00

  Alloys containing diamond {or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes} · CPC title

• C04B35/52

  based on carbon, e.g. graphite · CPC title

• B22F2005/001

  Cutting tools, earth boring or grinding tool other than table ware · CPC title

• B22F7/008

  characterised by the composition · CPC title