# US 2016/0076355 A1 · Apparatuses and methods for obtaining at-bit measurements for an earth-boring drilling tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0076355 A1 - Document ID: US20160076355A1 - Status: Published application - Kind: A1 - Application number: 14/950,581 - Filed: 2015-11-24 - Published: 2016-03-17 - Earliest claimed: 2012-08-15 - Assignees: Baker Hughes Incorporated; Element Six Limited - Applicants: Baker Hughes Incorporated; Element Six Limited - Inventors: Danny E. Scott; Timothy Peter Mollart; John Robert Brandon - Web page: https://patentgrep.com/patent/US20160076355A1 ## CPC - E21B 49/003: {by analysing drilling variables or conditions (E21B49/005 takes precedence; systems specially adapted for monitoring a plurality of drilling variables or conditions E21B44/00)} - B22F 7/06: of composite workpieces or articles from parts, e.g. to form tipped tools {(B22F7/002 takes precedence)} - C22C 26/00: Alloys containing diamond {or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes} - E21B 10/55: with preformed cutting elements - E21B 10/56: Button-type inserts (E21B10/52 takes precedence) - E21B 10/567: with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts - E21B 12/00: Accessories for drilling tools - E21B 12/02: Wear indicators - E21B 44/00: Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions - E21B 47/00: Survey of boreholes or wells (monitoring pressure or flow of drilling fluid E21B21/08) - E21B 47/013: Devices specially adapted for supporting measuring instruments on drill bits - B22F 2005/001: {Cutting tools, earth boring or grinding tool other than table ware} - B22F 2005/005: {Article surface comprising protrusions} - E21B 10/54: the bit being of the rotary drag type, e.g. fork-type bits - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - C22C: ALLOYS (treatment of alloys C21D, C22F) ## Abstract An earth-boring drilling tool comprises a cutting element. The cutting element comprises a substrate, a diamond table, and at least one sensing element formed from a doped diamond material disposed at least partially within the diamond table. A method for determining an at-bit measurement for an earth-boring drill bit comprises receiving an electrical signal generated within a doped diamond material disposed within a diamond table of a cutting element of the earth-boring drill bit, and correlating the electrical signal with at least one parameter during a drilling operation. ## Claims ### Claim 1 An instrumented cutting element for use on an earth-boring tool, the instrumented cutting element comprising: a substrate; a diamond table bonded to the substrate and having a cutting surface; and at least one sensing element disposed at least partially within the diamond table, the at least one sensing element comprising a doped diamond material wherein the diamond table comprises at least one conduit comprising an electrical conductor coupled with the at least one sensing element and extending through at least a portion of the diamond table. ### Claim 2 (depends on 1) The instrumented cutting element of claim 1, wherein the at least one conduit extends along the cutting surface of the diamond table and in a direction at least substantially parallel to the cutting surface. ### Claim 3 (depends on 1) The instrumented cutting element of claim 1, wherein the doped diamond material includes polycrystalline diamond and a dopant selected from the group consisting of boron, phosphorus, and sulfur. ### Claim 4 (depends on 1) The instrumented cutting element of claim 1, wherein the doped diamond material is embedded within the diamond table. ### Claim 5 (depends on 1) The instrumented cutting element of claim 1, wherein the doped diamond material extends only partially through the diamond table. ### Claim 6 (depends on 1) The instrumented cutting element of claim 1, wherein the at least one conduit further comprises a dielectric material surrounding the electrical conductor and electrically isolating the electrical conductor from the diamond table. ### Claim 7 (depends on 1) The instrumented cutting element of claim 1, further comprising an electrical contact coupled with the substrate on a surface of the substrate opposite the diamond table. ### Claim 8 (depends on 1) The instrumented cutting element of claim 1, wherein the doped diamond material is formed in one of an annular shape, a linear shape, and a rectangular shape. ### Claim 9 (depends on 1) The instrumented cutting element of claim 1, wherein the at least one sensing element includes a plurality of sensing elements each comprising a doped diamond material disposed at least partially within the diamond table. ### Claim 10 (depends on 9) The instrumented cutting element of claim 9, wherein the sensing elements of the plurality of sensing elements are concentrically arranged. ### Claim 11 (depends on 1) The instrumented cutting element of claim 1, wherein the diamond table comprises polycrystalline diamond including inter-bonded diamond grains with interstitial spaces between the inter-bonded diamond grains, at least a portion of the interstitial spaces being at least substantially free of metal solvent catalyst material. ### Claim 12 (depends on 1) The instrumented cutting element of claim 1, wherein the at least one sensing element comprises two or more sensing elements and the at least one conduit comprises two or more conduits, wherein each conduit of the two or more conduits is coupled with a respective sensing element of the two or more sensing elements. ### Claim 13 An earth-boring tool, comprising: a tool body; and an instrumented cutting element attached to the tool body, the instrumented cutting element comprising: a substrate; a diamond table bonded to the substrate; and at least one sensing element disposed at least partially within the diamond table, the at least one sensing element comprising a doped diamond material and extending from an interface between the substrate and the diamond table and extending only partially through the diamond table. ### Claim 14 (depends on 13) The earth-boring tool of claim 13, wherein the earth-boring tool comprises an earth-boring rotary drill bit. ### Claim 15 (depends on 13) The earth-boring tool of claim 13, wherein the doped diamond material includes polycrystalline diamond and a dopant selected from the group consisting of boron, phosphorus, and sulfur. ### Claim 16 (depends on 13) The earth-boring tool of claim 13, further comprising an electrical conductor extending through at least a portion of the diamond table of the instrumented cutting element and coupled with the at least one sensing element. ### Claim 17 A method for obtaining a measurement at an earth-boring tool, the method comprising: receiving during at least one of a borehole drilling operation and a borehole enlarging operation through a subterranean formation an electrical signal through a conduit extending through a diamond table of the instrumented cutting element from a doped diamond material disposed at least partially within the diamond table of the instrumented cutting element attached to the earth-boring tool; and correlating at least one characteristic of the electrical signal with at least one parameter associated with the at least one of a borehole drilling operation and a borehole enlarging operation, wherein the correlating the at least one characteristic of the electrical signal with at least one parameter includes correlating the at least one characteristic of the electrical signal with at least one characteristic of the subterranean formation. ### Claim 18 (depends on 17) The method of claim 17, wherein correlating the at least one characteristic of the electrical signal with at least one parameter includes correlating at least one characteristic of the instrumented cutting element with the at least one characteristic of the electrical signal. ### Claim 19 (depends on 17) The method of claim 17, further comprising actively controlling the at least one of a borehole drilling operation and a borehole enlarging operation through the subterranean formation responsive to data derived from the electrical signal. ### Claim 20 (depends on 17) The method of claim 17, wherein receiving an electrical signal through a conduit extending through a diamond table of the instrumented cutting element comprising receiving the electrical signal through a conduit extending through a diamond table and along a cutting surface of the diamond table.