# US 10,767,464 B2 · Insulator base for antenna assemblies > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,464 B2 - Document ID: US10767464B2 - Status: Granted - Kind: B2 - Application number: 16/461,770 - Filed: 2017-11-14 - Published: 2019-11-28 - Granted: 2020-09-08 - Earliest claimed: 2016-12-22 - Assignees: Halliburton Energy Services, Inc. - Applicants: Halliburton Energy Services, Inc. - Inventors: Jesse K. Hensarling; Alexei Korovin; Brian Mohon - Web page: https://patentgrep.com/patent/US10767464B2 ## CPC - E21B 47/017: Protecting measuring instruments - E21B 47/12: Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling - 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)} - G01V 3/30: operating with electromagnetic waves - H01Q 1/04: Adaptation for subterranean or subaqueous use - H01Q 7/00: Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - G01V: GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS (means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B29/02) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract Wellbore logging tools can include a coil antenna assembly that prevents breakage of a coil wire during downhole use under elevated pressure. The antenna assembly can include an insulator base used to help insulate the wires so elevated downhole pressures do not result in a short to a tool mandrel. The insulator base provides a recessed path for the in/out portions of the wire so manufacturing fixtures of the antenna assembly will not damage them. ## Claims ### Claim 1 A logging tool, comprising: a tool mandrel; a bobbin positioned about the tool mandrel; a coil including windings of a wire wrapped about the bobbin, the wire comprising a beginning portion and an end portion; and an insulator base having an end that radially interposes the tool mandrel and an end of the bobbin, the insulator base defining one or more wire channels in an upper surface of the insulator base that receive the beginning portion and the end portion of the wire, wherein the one or more wire channels exhibit a depth deep enough such that the wire rests below the upper surface when received within the one or more wire channels. ### Claim 2 (depends on 1) The logging tool of claim 1, wherein the insulator base comprises a dielectric material selected from the group consisting of a high temperature plastic, a thermoplastic, a polymer, a ceramic, an epoxy material, a composite material, and any combination thereof. ### Claim 3 (depends on 1) The logging tool of claim 1, wherein the one or more wire channels comprise a first wire channel that receives the beginning portion of the wire, and a second wire channel that receives the end portion of the wire. ### Claim 4 A logging tool, comprising: a tool mandrel; a bobbin positioned about the tool mandrel; a coil including windings of a wire wrapped about the bobbin, the wire comprising a beginning portion and an end portion; and an insulator base having an end that radially interposes the tool mandrel and an end of the bobbin, the insulator base defining one or more wire channels that receive the beginning portion and the end portion of the wire, wherein the insulator base further includes a service loop region. ### Claim 5 A logging tool, comprising: a tool mandrel; a bobbin positioned about the tool mandrel; a coil including windings of a wire wrapped about the bobbin, the wire comprising a beginning portion and an end portion; and an insulator base having an end that radially interposes the tool mandrel and an end of the bobbin, the insulator base defining one or more wire channels that receive the beginning portion and the end portion of the wire, wherein the bobbin is positioned within a saddle defined in the tool mandrel, and wherein the insulator base is positioned within a cavity defined in an outer radial surface of the saddle. ### Claim 6 (depends on 5) The logging tool of claim 5, wherein a depth of the cavity is sized to receive the insulator base such that an upper surface of the insulator base rests flush with or below the outer radial surface of the saddle. ### Claim 7 (depends on 5) The logging tool of claim 5, wherein the insulator base is secured within the cavity via at least one of an adhesive, an epoxy, an interference fit, one or more mechanical fasteners, or any combination thereof. ### Claim 8 (depends on 5) The logging tool of claim 5, wherein the insulator base comprises a dielectric material selected from the group consisting of a high temperature plastic, a thermoplastic, a polymer, a ceramic, an epoxy material, a composite material, and any combination thereof. ### Claim 9 A logging tool comprising: a tool mandrel having a cavity; an insulator base within the cavity and defining one or more wire channels in an upper surface of the insulator base that exhibit a depth deep enough such that a wire rests below the upper surface when received within the one or more wire channels; a bobbin positioned about the tool mandrel and an end of the insulator base; an electronics module positioned within the tool mandrel; and a coil including windings of the wire wrapped about the bobbin, wherein a beginning portion and an end portion of the wire extend within the one or more wire channels and to the electronics module and the one or more wire channels exhibit a depth deep enough such that a wire rests below the upper surface when received within the one or more wire channels. ### Claim 10 (depends on 9) The logging tool of claim 9, wherein the one or more wire channels comprise a first wire channel that receives the beginning portion of the wire, and a second wire channel that receives the end portion of the wire. ### Claim 11 A logging tool, comprising: a tool mandrel having a cavity; an insulator base within the cavity and defining one or more wire channels; a bobbin positioned about the tool mandrel and an end of the insulator base; an electronics module positioned within the tool mandrel; and a coil including windings of a wire wrapped about the bobbin, wherein a beginning portion and an end portion of the wire extend within the one or more wire channels and to the electronics module, wherein the insulator base further includes a service loop region. ### Claim 12 A logging tool, comprising: a tool mandrel having a cavity; an insulator base within the cavity and defining one or more wire channels; a bobbin positioned about the tool mandrel and an end of the insulator base; an electronics module positioned within the tool mandrel; a coil including windings of a wire wrapped about the bobbin, wherein a beginning portion and an end portion of the wire extend within the one or more wire channels and to the electronics module, wherein the bobbin is positioned within a saddle defined in the tool mandrel, and wherein the cavity is defined in an outer radial surface of the saddle. ### Claim 13 (depends on 12) The logging tool of claim 12, wherein a depth of the cavity is sized to receive the insulator base such that an upper surface of the insulator base rests flush with or below the outer radial surface of the saddle. ### Claim 14 (depends on 12) The logging tool of claim 12, wherein the insulator base is secured within the cavity via at least one of an adhesive, an epoxy, an interference fit, one or more mechanical fasteners, or any combination thereof. ### Claim 15 A method, comprising: positioning a bobbin about a tool mandrel and an end of an insulator base within a cavity of the tool mandrel; winding a wire about the bobbin; positioning a beginning portion and an end portion of the wire within one or more wire channels of the insulator base, wherein the one or more wire channels are defined in an upper surface of the insulator base and exhibit a depth deep enough such that the wire rests below the upper surface when received within the one or more wire channels; and coupling the beginning portion and the end portion to an electronics module within the tool mandrel. ### Claim 16 A method, comprising: positioning a bobbin about a tool mandrel and an end of an insulator base within a cavity of the tool mandrel; winding a wire about the bobbin; positioning a beginning portion and an end portion of the wire within one or more wire channels of the insulator base; and coupling the beginning portion and the end portion to an electronics module within the tool mandrel; wherein the bobbin is positioned within a saddle defined in the tool mandrel, and wherein the cavity is defined in an outer radial surface of the saddle. ### Claim 17 (depends on 16) The method of claim 16, wherein a depth of the cavity is sized to receive the insulator base such that an upper surface of the insulator base rests flush with or below the outer radial surface of the saddle.