Downhole Drill Bit Cutting Element with Chamfered Ridge

Patent metadata

Field	Value
Publication number	US-2019178038-A1
Application number	US-201916278272-A
Country	US
Kind code	A1
Filing date	Feb 18, 2019
Priority date	Apr 16, 2014
Publication date	Jun 13, 2019
Grant date	—

Abstract

A cutting element for a drill bit includes a body having a face at an end thereof. The face includes a ramp, a first side region, a second side region, and a ridge thereon. The ramp has a curved edge along a periphery of the face, a first side, and a second side. The first side and the second side extend from opposite ends of the curved edge and converge at a location along the face. The ridge extends along the face from a chamfer along a peripheral edge of the face to the location. The ridge is positioned between the first side region and the second side region. The first side region extends between the periphery, the ridge, and the first side. The second side region extends between the periphery, the ridge, and the second side. The ramp extends from the first side region to the second side region.

First claim

1 . A cutting element for a drill bit configured to drill a borehole in a subterranean formation, the cutting element comprising:
a body having a face at an end thereof, wherein the face includes a ramp, a first side region, a second side region, and a ridge thereon; wherein the ramp has a curved edge along a periphery of the face, a first side, and a second side, wherein the first side and the second side of the ramp extend from opposite ends of the curved edge and converge at a location along the face; wherein the ridge extends along the face from the periphery of the face to the location, wherein the ridge is positioned between the first side region and the second side region; wherein the first side region extends between the periphery, the ridge, and the first side of the ramp, wherein the second side region extends between the periphery, the ridge, and the second side of the ramp, and wherein the ramp extends from the first side region to the second side region.

2 . The cutting element of claim 1 , wherein the first side region and the second side region are convex.

3 . The cutting element of claim 2 , wherein the ramp is planar.

4 . The cutting element of claim 1 , wherein the first side region and the second side region are concave.

5 . The cutting element of claim 4 , wherein the ramp is planar.

6 . The cutting element of claim 1 , wherein the ramp is concave or convex.

7 . The cutting element of claim 1 , wherein a ramp angle α between the first side and the second side is 60° to 120°.

8 . The cutting element of claim 2 , wherein the ramp angle α is 90°.

9 . The cutting element of claim 1 , wherein a surface angle λ along the first side region between the ridge and the first side of the ramp is 135°.

10 . The cutting element of claim 30 , wherein the chamfer is disposed at a chamfer angle θ relative to a horizontal line, wherein the chamfer angle θ is 15° to 75°.

11 . (canceled)

12 . The cutting element of claim 1 , wherein the ramp, the first side, and the second slide sides slope upward moving from the periphery to the location.

13 . The cutting element of claim 1 , wherein the ridge has a length ranging from ⅓ to ⅔ of a diameter of the face.

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

15 . The cutting element of claim 1 , wherein the ridge has a width W that increases or decreases moving from the location to the periphery of the face.

16 . The cutting element of claim 1 , wherein the location is spaced from a center of the face.

17 . The cutting element of claim 30 , wherein the chamfer defines a leading cutting edge of the cutting element for engagement with a wall of the wellbore.

18 . 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 of claim 1 mounted to the bit body.

19 . A cutting element for a drill bit configured to drill a borehole in a subterranean formation, the cutting element comprising:
a substrate having a central axis; a cutting layer bonded to the substrate, wherein the cutting layer includes a face configured to engage the formation; wherein the face of the cutting layers comprises:
a ramp, a first side region, a second side region, and a raised ridge positioned between the first side region and the second side region;
wherein the ramp is defined by a periphery of the face, a first side extending along the first side region, and a second side extending along the second side region, wherein the first side and the second side of the ramp extend from the periphery of the face to a location along the face;
wherein the raised ridge extends along the face from the periphery of the face to the location;
wherein the first side region extends between the periphery of the face, the ridge, and the first side of the ramp, wherein the second side region extends between the periphery of the face, the ridge, and the second side of the ramp.

20 . The cutting element of claim 19 , wherein the first side region and the second side region are convex.

21 . The cutting element of claim 20 , wherein the ramp is planar.

22 . The cutting element of claim 19 , wherein the first side region and the second side region are concave.

23 . The cutting element of claim 22 , wherein the ramp is planar.

24 . The cutting element of claim 19 , wherein the ramp is concave or convex.

25 . The cutting element of claim 19 , wherein a ramp angle a between the first side and the second side is 60° to 120°.

26 . The cutting element of claim 19 , wherein the ramp, the first side, and the second slide sides slope upward moving from the periphery to the location.

27 . The cutting element of claim 19 , wherein the ridge has a length that is less than ½ a diameter of the face

28 . The cutting element of claim 19 , wherein the ridge has a width W that increases or decreases moving from the location to the periphery of the face.

29 . The cutting element of claim 19 , wherein the location is spaced from a center of the face.

30 . The cutting element of claim 1 , wherein a chamfer is disposed along the periphery of the face, and wherein the ramp extends from the chamfer to the location.

Assignees

• Nat Oilwell Dht Lp

Inventors

• Rahmani Reza

Classifications

• E21B10/5676

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

• E21B10/5673 Primary

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