Nondestructive method of measuring a region within an ultra-hard polycrystalline construction

• US 7,801,268 B1
• Filed: 07/06/2009
• Issued: 09/21/2010
• Est. Priority Date: 05/09/2006
• Status: Active Grant

• Current Assignee: Smith International Incorporated (Schlumberger NV)
• Original Assignee: Smith International Incorporated (Schlumberger NV)
• Inventors: Eyre, Ronald K., Mourik, Nephi
• Primary Examiner(s): Yun; Jurie
• Application Number:
  US12/498,239
• Time in Patent Office: 442 Days
• Field of Search: 378/4, 378/51, 378 53- 58, 378/62, 378/64, 378/89
• US Class Current: 378/54
• CPC Class Codes: G01B 15/02 for measuring thickness

Abstract

Methods for nondestructively measuring a characteristic within an ultra-hard polycrystalline construction comprises projecting a beam of energy from an emitter onto the construction. The energy is directed to a target region within the ultra-hard polycrystalline construction and passes through the construction where it is received by a detector. The target region can be within a diamond body of the construction, and can relate to an interface between two or more regions within the diamond body. The energy that is received by the detector is evaluated for the purpose of determining the desired measurement characteristic. In an example embodiment, the measured characteristic can be the interface of between two or more regions and the distance from a surface of the construction to the interface. The method can be used to generate an average distance within the construction, and to provide a visual image of the same in a nondestructive manner.

Claims

1. A method for determining a characteristic within a sintered polycrystalline diamond body, the method comprising the steps of:

projecting a beam of energy onto the sintered polycrystalline diamond body;

receiving energy from the sintered polycrystalline diamond body; and

determining the characteristic from the received energy.

2. The method as recited in claim 1 wherein the diamond body includes a top surface and a side surface, and wherein during the step of projecting, the beam of energy is projected onto the side surface of the diamond body.

3. The method as recited in claim 1 wherein the characteristic involves a region in the diamond body.

4. The method as recited in claim 3 wherein the region is substantially free of a catalyst material used to form the sintered polycrystalline diamond body.

5. The method as recited in claim 3 wherein the characteristic is a depth of the region.

6. The method as recited in claim 1 wherein the beam of energy is directed onto a surface of the body perpendicular to the beam.

7. The method as recited in claim 1 wherein the diamond body includes a substrate attached thereto to form a cutting element, and wherein the cutting element is attached to a bit used for drilling subterranean formations.

8. A method for determining a characteristic of a region within a sintered polycrystalline diamond body of an ultra-hard cutting element comprising a metallic substrate joined to the polycrystalline diamond body, the method comprising the steps of:

projecting x-ray wavelength energy onto a surface of the sintered polycrystalline diamond body;

receiving energy passing through the polycrystalline diamond body into a detecting source; and

determining the characteristic by evaluating the energy received by the detecting source.

9. The method as recited in claim 8 wherein the polycrystalline diamond body comprises a matrix phase of bonded-together diamond grains and interstitial regions interposed between the diamond grains.

10. The method as recited in claim 9 wherein during the step of projecting, x-ray wavelength energy is directed to a region of the polycrystalline diamond body that includes interstitial regions that are substantially free of a catalyst material used to form the polycrystalline diamond body.

11. The method as recited in claim 10 wherein the characteristic being determined involves the region of the polycrystalline diamond body substantially free of the catalyst material.

12. The method as recited in claim 11 wherein the characteristic is a depth of the region substantially free of the catalyst material.

13. The method as recited in claim 8 wherein the cutting element is attached to a bit used to drill subterranean formations, and wherein the x-ray wavelength energy is directed onto a side surface of the polycrystalline diamond body.

14. A system for determining a characteristic of an ultra-hard polycrystalline construction comprising a sintered polycrystalline diamond body attached to a substrate, the system comprising:

an emitter positioned to project a beam of energy onto a surface of the polycrystalline diamond body;

a detector positioned adjacent the polycrystalline diamond body to receive energy passing therethrough; and

means for determining the characteristic from the energy received by the detector.

15. The system as recited in claim 14 wherein the polycrystalline diamond body is interposed between the emitter and detector.

16. The system as recited in claim 14 wherein the emitter projects x-ray wavelength energy.

17. The system as recited in claim 14 wherein the polycrystalline diamond body includes a region that is substantially free of a catalyst material used to form the diamond body.

18. The system as recited in claim 17 wherein the characteristic being determined relates to the region substantially free of the catalyst material.

19. The system as recited in claim 18 wherein the characteristic is a depth of the region substantially free of the catalyst material.

20. The system as recited in claim 14 wherein the ultra-hard polycrystalline diamond construction is attached to a bit used for drilling subterranean formations.