# US 11,299,937 B2 · High pressure dual electrical collet assembly for oil and gas applications > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,299,937 B2 - Document ID: US11299937B2 - Status: Granted - Kind: B2 - Application number: 17/005,758 - Filed: 2020-08-28 - Published: 2021-04-01 - Granted: 2022-04-12 - Earliest claimed: 2019-09-30 - Assignees: Halliburton Energy Services, Inc. - Applicants: Halliburton Energy Services, Inc. - Inventors: Robert William Gissler - Web page: https://patentgrep.com/patent/US11299937B2 ## CPC - E21B 17/0285: {characterised by electrically insulating elements} - H01B 5/14: comprising conductive layers or films on insulating-supports - E21B 17/003: {with electrically conducting or insulating means (E21B17/028 and E21B17/023 take precedence)} - E21B 33/0355: {Control systems, e.g. hydraulic, pneumatic, electric, acoustic, for submerged well heads} - E21B 33/0385: {electrical connectors} - H01B 7/0216: {Two layers} - H01B 7/046: {attached to objects sunk in bore holes, e.g. well drilling means, well pumps} - H01B 7/1895: {Internal space filling-up means} - H01B 7/20: Metal tubes, e.g. lead sheaths - H01R 13/111: {co-operating with pins having a circular transverse section} - H01R 13/187: with spring member in the socket - H01R 13/5221: {having cable sealing means} - H01R 13/521: {Sealing between contact members and housing, e.g. sealing insert} - H01R 2101/00: One pole - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS ## Abstract Downhole connection assemblies include a connector to receive a conductor and pin at opposite ends. The connector includes a first electrical collet, a separate second electrical collet and a sleeve. The first collet includes a first recess in a first end to receive the conductor and a second recess in a second end to receive the pin. The second collet is positioned around the pin and separated from the first collet. The sleeve is positioned around the pin, first collet and the second collet. Downhole cables include a center electrical conductor, a first insulator positioned around the center conductor, a second insulator positioned around the first insulator, and a pressure tube surrounding the second insulator. The cable further includes one or more slots extending axially along a length of the second insulator, or one or more slots extending axially along an inner diameter of the pressure tube. ## Claims ### Claim 1 A high-pressure electrical connection assembly for connecting an electrical conductor to an electrical pin for use in an oil and gas application, comprising: a housing having a bore therein to receive the electrical conductor; and a connector positioned within the bore to receive the electrical conductor in a first end and the electrical pin in a second end to thereby maintain electrical contact between the electrical conductor and electrical pin, wherein the connector comprises: a first electrical collet having a first recess in a first end to receive the electrical conductor and a second recess in a second end to receive the electrical pin, the first electrical collet being in electrical contact with the electrical pin; a second electrical collet to receive the electrical pin, the second electrical collet being separate from the first electrical collet and being in electrical contact with the electrical pin; and a sleeve positioned around the electrical pin, first electrical collet and the second electrical collet. ### Claim 2 (depends on 1) The high-pressure electrical connection assembly as defined in claim 1, wherein: the first electrical collect comprises contact faces on the second end which compress against the electrical pin; and the electrical pin comprises an upset diameter face which mates against the contact faces of the first electrical collet when the electrical pin is moved in a direction away from the electrical conductor. ### Claim 3 (depends on 1) The high-pressure electrical connection assembly as defined in claim 1, wherein the second electrical collet comprises a first end in contact with the sleeve and a second end compressed against electrical pin. ### Claim 4 (depends on 1) The high-pressure electrical connection assembly as defined in claim 1, wherein: the first electrical collet has a first resonance; and the second electrical collet has a second resonance different from the first resonance. ### Claim 5 (depends on 1) The high-pressure electrical connection assembly as defined in claim 1, further comprising: a first insulator positioned around the connector; and a boot seal positioned around the first insulator. ### Claim 6 (depends on 5) The high-pressure electrical connection assembly as defined in claim 5, further comprising a sapphire sleeve positioned around the electrical pin, the sapphire sleeve being axially separated from the sleeve along the electrical pin, wherein the first insulator and the boot seal each straddle the sleeve and sapphire sleeve. ### Claim 7 (depends on 6) The high-pressure electrical connection assembly as defined in claim 6, further comprising a shape memory shrink ring positioned around the sapphire sleeve to thereby secure the sapphire sleeve to the electrical pin. ### Claim 8 (depends on 1) The high-pressure electrical connection assembly as defined in claim 1, wherein the connection assembly is part of subsea or downhole completion string. ### Claim 9 A high-pressure electrical connection assembly for connecting an electrical conductor to an electrical pin for use in an oil and gas application, comprising: a housing having a bore therein to receive the electrical conductor; and a connector positioned within the bore to receive the electrical conductor in a first end and the electrical pin in a second end, wherein the connector comprises: a first electrical collet in electrical contact with the electrical conductor and the electrical pin; and a second electrical collet in electrical contact with the electrical pin, the second electrical collet being separate from the first electrical collet. ### Claim 10 (depends on 9) The high-pressure electrical connection assembly as defined in claim 9, further comprising a sleeve positioned around the electrical pin, first electrical collet and the second electrical collet. ### Claim 11 (depends on 10) The high-pressure electrical connection assembly as defined in claim 10, wherein the second electrical collet comprises a first end in contact with the sleeve and a second end compressed against the electrical pin. ### Claim 12 (depends on 10) The high-pressure electrical connection assembly as defined in claim 10, further comprising a sapphire sleeve positioned around the electrical pin, wherein the sapphire sleeve is axially separated from the sleeve along the electrical pin. ### Claim 13 (depends on 12) The high-pressure electrical connection assembly as defined in claim 12, further comprising a shape memory shrink ring positioned around the sapphire sleeve to thereby secure the sapphire sleeve to the electrical pin. ### Claim 14 (depends on 9) The high-pressure electrical connection assembly as defined in claim 9, wherein: the first electrical collect comprises contact faces on the second end which compress against the electrical pin; and the electrical pin comprises an upset diameter face which mates against the contact faces of the first electrical collet when the electrical pin is moved in a direction away from the electrical conductor. ### Claim 15 (depends on 9) The high-pressure electrical connection assembly as defined in claim 9, wherein: the first electrical collet has a first resonance; and the second electrical collet has a second resonance different from the first resonance. ### Claim 16 (depends on 9) The high-pressure electrical connection assembly as defined in claim 9, further comprising: a first insulator positioned around the connector; and a boot seal positioned around the first insulator. ### Claim 17 (depends on 9) The high-pressure electrical connection assembly as defined in claim 9, wherein the connection assembly is part of subsea or downhole completion string. ### Claim 18 A method to fabricate a high-pressure electrical connection assembly for connecting an electrical conductor to an electrical pin for use in an oil and gas application, the method comprising: providing a housing having a bore therein to receive the electrical conductor; and providing a connector positioned within the bore to receive the electrical conductor in a first end and the electrical pin in a second end, wherein the connector comprises: a first electrical collet in electrical contact with the electrical conductor and the electrical pin; and a second electrical collet in electrical contact with the electrical pin, the second electrical collet being separate from the first electrical collet. ### Claim 19 (depends on 18) The method of claim 18, further comprising: providing the first electrical collect with contact faces that compress against the electrical pin; and providing the electrical pin with an upset diameter face that mates against the contact faces of the first electrical collet when the electrical pin is moved in a direction away from the electrical conductor. ### Claim 20 (depends on 18) The method of claim 18, wherein: a configuration of the first electrical collet is selected such that the first electrical collet has a first resonance; and a configuration of the second electrical collet is selected such that the second electrical collet has a second resonance different from the first resonance frequency.