Downhole Drill Bit Cutting Element with Chamfered Ridge

Patent metadata

Field	Value
Publication number	US-2017030144-A1
Application number	US-201515302445-A
Country	US
Kind code	A1
Filing date	Apr 16, 2015
Priority date	Apr 16, 2014
Publication date	Feb 2, 2017
Grant date	—

Abstract

A cutting element for a drill bit is advanceable into a subterranean formation to form a wellbore. The cutting element includes an element body having a face at an end thereof, and a ridge. The element body has a face at an end thereof. The face has a ramp and a pair of side regions thereon. The ramp has a curved edge along a periphery of the face and two sides. Each of the two sides extends from opposite ends of the curved edge and converges at a location along the face. The face has a chamfer along a peripheral edge thereof. The ridge is between the chamfer and the location. Each of the pair of side regions is positioned on opposite sides of the ridge and extends between the periphery, the ridge, and one of the two sides of the ramp whereby the chamfer engages a wall of the wellbore and extrudate is drawn along the pair of side regions.

First claim

What is claimed is:

1 . A cutting element for a drill bit, the drill bit advanceable into a subterranean formation to form a wellbore, the cutting element comprising:
an element body having a face at an end thereof, the face having a ramp and a pair of side regions thereon, the ramp having a curved edge along a periphery of the face and two sides, each of the two sides extending from opposite ends of the curved edge and converging at a location along the face, the face having a chamfer along a peripheral edge thereof; and a ridge between the chamfer and the location, each of the pair of side regions positioned on opposite sides of the ridge and extending between the periphery, the ridge, and one of the two sides of the ramp whereby the chamfer engages a wall of the wellbore and extrudate is drawn along the pair of side regions.

2 . (canceled)

3 . (canceled)

4 . The cutting element of claim 1 , wherein a ramp angle is defined between the sides of the ramp.

5 . The cutting element of claim 4 , wherein the ramp angle is 60 to 90 degrees.

6 . The cutting element of claim 1 , wherein a surface angle is defined along the side regions between the ridge and the one of the two sides of the ramp.

7 . The cutting element of claim 7 , wherein the surface angle is 135 degrees.

8 . The cutting element of claim 1 , wherein a chamfer angle is defined between a horizontal line and a face of the chamfer.

9 . The cutting element of claim 10 , wherein the side angle is 45 degrees.

10 . The cutting element of claim 1 , wherein the ramp and the sides incline along the periphery.

11 . The cutting element of claim 10 , wherein the ramp and the side regions incline at an angle of 10 degrees.

12 . The cutting element of claim 1 , wherein at least one of the ramp and the side regions are flat.

13 . The cutting element of claim 1 , wherein at least one of the ramp and the side regions have a curved surface.

14 . The cutting element of claim 1 , wherein the location is positioned about a center of the face.

15 . The cutting element of claim 1 , wherein the location is positioned a distance from a center of the face.

16 . The cutting element of claim 1 , wherein the sides are along a radius of the face.

17 . The cutting element of claim 1 , wherein the ridge is along a radius of the face.

18 . (canceled)

19 . (canceled)

20 . The cutting element of claim 1 , wherein the ridge has a length ½ of a diameter of the face.

21 . The cutting element of claim 1 , wherein the ridge has a length less than ½ of a diameter of the face.

22 . The cutting element of claim 1 , wherein the ridge has a width that narrows away from a center of the face.

23 . The cutting element of claim 1 , wherein the ridge has a width that widens away from a center of the face.

24 . The cutting element of claim 1 , wherein the chamfer extends along the periphery between 10 and 360 degrees of the periphery of the face.

25 . The cutting element of claim 1 , wherein the chamfer defines a leading edge of the cutting element for engagement with a wall of the wellbore.

26 . Cancelled

27 . A drill bit advanceable into a subterranean formation to form a wellbore, the drill bit comprising:
a bit body; and at least one cutting element disposable in the bit body, the at least one cutting element comprising: an element body having a face at an end thereof, the face having a ramp and a pair of side regions thereon, the ramp having a curved edge along a periphery of the face and two sides, each of the two sides extending from opposite ends of the curved edge and converging at a location along the face, the face having a chamfer along a peripheral edge thereof; and a ridge between the chamfer and the location, each of the pair of side regions positioned on opposite sides of the ridge and extending between the periphery, the ridge, and one of the two sides of the ramp whereby the chamfer engages a wall of the wellbore and extrudate is drawn along the pair of side regions.

28 . The drill bit of claim 27 , wherein the bit body has blades extending radially therefrom.

29 . The drill bit of claim 27 , wherein the bit body has at least one socket to receive the at least one cutting element therein.

30 . (canceled)

31 . (canceled)

32 . (canceled)

Assignees

• Nat Oilwell Dht Lp

Inventors

• Rahmani Reza

Classifications

• E21B10/5673 Primary

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

• E21B10/5676

  having a cutting face with different segments, e.g. mosaic-type inserts · CPC title