US5316095A — Drill bit cutting element with cooling channels

Claim 1

Independent Claim 79 words

A diamond cutting element for boring a subterranean formation, comprising: a diamond layer including a front face and a rear face; substrate means secured to said rear face; a peripheral contact zone on said diamond layer for engaging said subterranean formation; and at least one internal channel including an outlet proximate said peripheral contact zone, said at least one internal channel extending along the boundary between said rear face and said substrate means as said channel approaches said outlet.

Claim 2

Dependent Claim 79 words

A diamond cutting element for boring a subterranean formation, comprising: a diamond layer including a front face and a rear face; substrate means secured to said rear face; a peripheral contact zone on said diamond layer for engaging said subterranean formation; and at least one internal channel including an outlet proximate said peripheral contact zone, said at least one internal channel extending along the boundary between said rear face and said substrate means as said channel approaches said outlet.

Claim 3

Dependent Claim 22 words

The diamond cutting element of claim 1, further including a feed passage for providing fluid to said at least one internal channel.

Claim 4

Dependent Claim 22 words

The diamond cutting element of claim 1, wherein said at least one channel is disposed at least partially in said diamond layer.

Claim 5

Dependent Claim 22 words

The diamond cutting element of claim 1, wherein said at least one channel is disposed at least partially in said substrate means.

Claim 6

Dependent Claim 27 words

The diamond cutting element of claim 1, wherein said at least one channel is defined at least in part between said diamond layer and said substrate means.

Claim 7

Dependent Claim 41 words

The diamond cutting element of claim 1, wherein said at least one channel comprises a plurality of channels having outlets disposed along said peripheral contact zone, and further including at least one cross-channel extending between at least two of said channels.

Claim 8

Dependent Claim 19 words

The diamond cutting element of claim 6, wherein said at least one cross-channel communicates with all of said channels.

Claim 9

Dependent Claim 38 words

The diamond cutting element of claim 1, wherein said at least one channel comprises a plurality of channels having outlets disposed along said peripheral contact zone and disposed in substantially mutually parallel relationship as they approach said outlets.

Claim 10

Dependent Claim 33 words

The diamond cutting element of claim 1, wherein said at least one channel comprises a plurality of channels having outlets disposed along said peripheral contact zone and diverging as they approach said outlets.

Claim 11

Dependent Claim 24 words

The diamond cutting element of claim 1, wherein said at least one channel comprises a plurality of channels extending from a common plenum means.

Claim 12

Dependent Claim 33 words

The diamond cutting element of claim 1, further including a cleaning aperture in addition to said at least one channel outlet extending from the interior of said cutting element to said front face.

Claim 13

Dependent Claim 34 words

The diamond cutting element of claim 1, further including a cleaning aperture extending from the interior of said cutting element to a location remote from said peripheral contact zone and adjacent said front face.

Claim 14

Dependent Claim 26 words

The diamond cutting element of claim 1, wherein said at least one channel contacts said rear face and extends through the rear of said substrate means.

Claim 15

Dependent Claim 14 words

The diamond cutting element of claim 1, wherein said diamond layer is substantially planar.

Claim 16

Dependent Claim 13 words

The diamond cutting element of claim 1, wherein said diamond layer is arcuate.

Claim 17

Dependent Claim 13 words

The diamond cutting element of claim 1, wherein said diamond layer is ridged.

Claim 18

Dependent Claim 15 words

The diamond cutting element of claim 1, wherein said diamond layer is of non-uniform thickness.

Claim 19

Dependent Claim 71 words

An earth boring drill bit, comprising: a bit body including a face; at least one diamond cutting element having a peripheral cutting edge and disposed on said bit face; an internal fluid passage in said bit body leading to said at least one diamond cutting element; a plurality of channels in said diamond cutting element in communication with said internal fluid passage and having outlets disposed along said peripheral cutting edge.

Claim 20

Dependent Claim 71 words

An earth boring drill bit, comprising: a bit body including a face; at least one diamond cutting element having a peripheral cutting edge and disposed on said bit face; an internal fluid passage in said bit body leading to said at least one diamond cutting element; a plurality of channels in said diamond cutting element in communication with said internal fluid passage and having outlets disposed along said peripheral cutting edge.

Claim 21

Dependent Claim 37 words

The earth boring drill bit of claim 18, wherein said at least one diamond cutting element comprises a diamond layer having a front face and a rear face, and a non-diamond substrate secured to said rear face.

Claim 22

Dependent Claim 16 words

The earth boring drill bit of claim 19, wherein said channels are defined in said substrate.

Claim 23

Dependent Claim 17 words

The earth boring drill bit of claim 19, wherein said channels are defined in said diamond layer.

Claim 24

Dependent Claim 23 words

The earth boring drill bit of claim 18, wherein said channels are defined partially in said diamond layer and partially in said substrate.

Claim 25

Dependent Claim 20 words

The earth boring drill bit of claim 18 wherein said channels are defined between said diamond layer and said substrate.

Claim 26

Dependent Claim 23 words

The earth boring drill bit of claim 18, wherein said substrate includes an aperture therein for communicating said channels with said fluid passage.

Claim 27

Dependent Claim 18 words

The earth boring drill bit of claim 18, further including a plenum extending to all of said channels.

Claim 28

Dependent Claim 41 words

The earth boring drill bit of claim 19, further including a cleaning aperture in communication with said internal fluid passage extending from the interior of said cutting element through said front face at a location remote from said peripheral cutting edge.

Claim 29

Dependent Claim 42 words

The earth boring drill bit of claim 19, further including a cleaning aperture in communication with said internal fluid passage extending from the interior of said cutting element to a location remote from said peripheral cutting edge and adjacent said front face.

Claim 30

Independent Claim 59 words

A method of cooling a diamond cutting element on an earth boring drill bit, comprising: providing a diamond cutting element having a peripheral cutting edge; contacting the earth with said peripheral cutting edge; and providing a flow of cooling fluid through said cutting element to said peripheral cutting edge at a plurality of locations along said peripheral cutting edge.

Claim 31

Independent Claim 59 words

A method of cooling a diamond cutting element on an earth boring drill bit, comprising: providing a diamond cutting element having a peripheral cutting edge; contacting the earth with said peripheral cutting edge; and providing a flow of cooling fluid through said cutting element to said peripheral cutting edge at a plurality of locations along said peripheral cutting edge.

Claim 32

Dependent Claim 23 words

The method of claim 28, wherein said cooling fluid is provided to said peripheral cutting edge at a plurality of laterally adjacent locations.

Claim 33

Dependent Claim 41 words

The method of claim 28, wherein said diamond cutting element comprises a diamond layer affixed to a substrate, and further including the step of providing a flow of cooling fluid along the boundary zone between said diamond layer and said substrate.

Claim 34

Dependent Claim 53 words

A diamond cutting element for boring a subterranean formation, comprising: a diamond layer disposed on a substrate; at least one internal channel extending through said cutting element to the periphery thereof, said at least one internal channel extending at least in part along the boundary zone between said diamond layer and said substrate.

Claim 35

Dependent Claim 53 words

A diamond cutting element for boring a subterranean formation, comprising: a diamond layer disposed on a substrate; at least one internal channel extending through said cutting element to the periphery thereof, said at least one internal channel extending at least in part along the boundary zone between said diamond layer and said substrate.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1997-05-30	1997-11-29	1998-05-31	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2001-05-30	2001-11-29	2002-05-31	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2005-05-30	2005-11-29	2006-05-31	$7700.00	Window Closed / Lapsed

Drill bit cutting element with cooling channels

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