Cutter and Cutting Tool Incorporating the Same

• US 20110031035A1
• Filed: 08/07/2009
• Published: 02/10/2011
• Est. Priority Date: 08/07/2009
• Status: Active Grant

• Current Assignee: Baker Hughes Holdings LLC (Baker Hughes Company)
• Original Assignee: Baker Hughes Incorporated (Baker Hughes Company)
• Inventors: Stowe, Calvin J. II, Ponder, Andrew
• Granted Patent: US 8,689,911 B2
• Time in Patent Office: Days
• US Class Current: 175/430
• CPC Class Codes: E21B 10/573 characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element
• CPC Class Codes: E21B 29/06 Cutting windows, e.g. directional window cutters for whipstock operations E21B29/005 and E21B29/08 take precedence

Abstract

A cutter for a downhole cutting tool is disclosed. The cutter includes a cutter body having a cutting face, a peripheral sidewall flank, and a base. The base has a recessed channel that extends inwardly from the peripheral sidewall flank and provides an inlet opening therein. A downhole cutting tool employing the cutter is also disclosed. The cutting tool includes a tool body having a cutter face. The tool also includes a cutter body having a cutting face, a peripheral sidewall flank, and a base, the base having a recessed channel that extends inwardly from the peripheral sidewall flank and provides an inlet opening therein. The tool also includes a braze joint between the base and the bonding surface.

Claims

1. A cutter comprising a cutter body having a cutting face, a peripheral sidewall flank, and a base, the base having a recessed channel that extends inwardly from the peripheral sidewall flank and provides an inlet opening therein.

2. The cutter of claim 1, wherein the recessed channel has a depth, a width and a length.

3. The cutter of claim 2, wherein one of the one of the width or height varies along the length of the channel.

4. The cutter of claim 2, wherein both the width and height vary along the length of the channel.

5. The cutter of claim 2, wherein the height varies across the width of the channel.

6. The cutter of claim 5, wherein one of the one of the width or height varies along the length of the channel.

7. The cutter of claim 5, wherein both the width and height vary along the length of the channel.

8. The cutter of claim 2, wherein the width is at least three times the height.

9. The cutter of claim 2, wherein the channel has a longitudinal axis and the base of the channel has a longitudinally extending raised portion.

10. The cutter of claim 6, wherein the longitudinally extending raised portion has a height, and wherein the height of the raised portion is less than the height of the channel.

11. The cutter of claim 7, wherein the longitudinally extending raised portion comprises a plurality of adjoining portions of a plurality of adjoining longitudinally extending grooves.

12. The cutter of claim 1, wherein the recessed channel comprises a plurality of recessed channels, each extending inwardly from the peripheral sidewall flank and providing an inlet opening therein.

13. The cutter of claim 1, wherein the recessed channel is a cross-body channel that extends from the inlet opening to an outlet opening.

14. The cutter of claim 10, wherein the recessed channel has a depth, a width and a length.

15. The cutter of claim 11, wherein one of the one of the width or length varies along the length of the channel.

16. The cutter of claim 11, wherein both the width and length vary along the length of the channel.

17. The cutter of claim 1, wherein the cutting face has a protruding portion.

18. The cutter of claim 14, wherein the protruding portion is located on a periphery of the cutting face or a central portion of the cutting face, or a combination thereof.

19. The cutter of claim 1, wherein the base is substantially parallel to the cutting face.

20. The cutter of claim 1, wherein the periphery of the sidewall has an elliptical, rounded rectangle or circular shape.

21. A downhole cutting tool, comprising:

a cutting tool having a bonding surface;

a cutter body having a cutting face, a peripheral sidewall flank, and a base, the base having a recessed channel that extends inwardly from the peripheral sidewall flank and provides an inlet opening therein; and

a braze joint between the cutting face and the bonding surface.