# US 2014/0152458 A1 · Inductive connection > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0152458 A1 - Document ID: US20140152458A1 - Status: Published application - Kind: A1 - Application number: 14/130,757 - Filed: 2012-06-19 - Published: 2014-06-05 - Earliest claimed: 2011-07-06 - Assignees: Interwell Technology AS - Inventors: Espen Hiorth; Bjørnar Svenning - Web page: https://patentgrep.com/patent/US20140152458A1 ## CPC - E21B 47/13: by electromagnetic energy, e.g. radio frequency - E21B 17/0283: {characterised by the coupling being contactless, e.g. inductive} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A well pipe for inductive connection to a well tool includes a tubular pipe string and an inductive pipe element. The pipe string includes an inner pipe wall defining a longitudinal opening, where a compartment is provided radially in a radial groove of the inner pipe wall and the inductive pipe element is provided in the compartment. The well tool includes a tool body and an inductive tool element provided in a groove provided radially on the outside of the tool body. The inductive tool element is connected to the tool body by a connection device, where the inductive tool element is movable between a run state and a set state, where the inductive tool element is provided in the groove in the run state and where the inductive tool element is radially protruding from the groove in the set state. ## Claims ### Claim 1 Well pipe for inductive connection to a well tool, comprising: a tubular pipe string comprising an inner pipe wall defining a longitudinal opening, where a compartment is provided radially in the inner pipe wall; an inductive pipe element provided in the compartment, where the inductive pipe element is connected to an electric pipe circuit; wherein the compartment is provided in a radial groove of the inner pipe wall. ### Claim 2 (depends on 1) The well pipe according to claim 1, where the inductive pipe element comprises a primary core body and a primary winding wound around the primary core body. ### Claim 3 (depends on 2) The well pipe according to claim 2, where the primary winding is wound around the primary core body along a primary winding axis, where the primary winding axis is parallel to a central axis of the well pipe. ### Claim 4 (depends on 2) The well pipe according to claim 2, where the primary core body comprises a top leg element, a primary leg element and a bottom leg element, where the primary winding is wound around the primary leg element. ### Claim 5 (depends on 2) The well pipe according to claim 2, where the primary core body has a shape that resembles the capital letter I in a Serif font. ### Claim 6 (depends on 1) The well pipe according to claim 1, where the inductive pipe element is separated from the longitudinal opening by a protective sheet made of a protective material. ### Claim 7 (depends on 1) The well pipe according to claim 1, where the well pipe comprises a wire channel, where the inductive pipe element is connected to the electric pipe circuit by wires provided in the wire channel. ### Claim 8 (depends on 1) The well pipe according to claim 1, wherein a plurality of inductive pipe elements are provided in the well pipe. ### Claim 9 (depends on 8) The well pipe according to claim 8, wherein said plurality of inductive pipe elements are evenly distributed along circumferences of said well pipe. ### Claim 10 Well tool for inductive connection to a well pipe, comprising: a tool body, where a groove is provided radially on the outside of the tool body; and an inductive tool element provided in the groove of the tool body; wherein the inductive tool element is connected to the tool body by a connection device, where the connection device allows the inductive tool element to be movable between a run state and a set state, where the inductive tool element is provided in the groove in the run state and where the inductive tool element is radially protruding from the groove in the set state. ### Claim 11 (depends on 10) The well tool according to claim 10, where the connection device comprises: a first pivotable arm having a first end pivotably connected to a first connection element of the tool and a second end pivotably connected to a first end of the inductive tool element; and a second pivotable arm having a first end pivotably connected to a second element of the tool and a second end pivotably connected to a second end of the inductive tool element. ### Claim 12 (depends on 11) The well tool according to claim 11, where at least one of the first connection element and the second connection element is movable in an axial direction in relation to the tool body. ### Claim 13 (depends on 10) The well tool according to claim 10, where the inductive tool element is connected to an electric tool circuit by means of a conductor provided within the first or second pivotable arm. ### Claim 14 (depends on 10) The well tool according to claim 10, where the inductive well element comprises a secondary core body and a secondary winding wound around the secondary core body. ### Claim 15 (depends on 14) The well tool according to claim 14, where the secondary winding is wound around the secondary core body along a secondary winding axis, where the secondary winding axis is parallel to a central axis of the well tool. ### Claim 16 (depends on 14) The well tool according to claim 14, where the secondary core body comprises a top leg element, a secondary leg element and a bottom leg element, where the secondary winding is wound around the secondary leg element. ### Claim 17 (depends on 14) The well tool according to claim 14, where the secondary core body has a shape that resembles the capital letter I in a Serif font. ### Claim 18 (depends on 14) The well tool according to claim 14, where the inductive tool element comprises an outer protective sheet made of a protective material. ### Claim 19 A system for providing inductive connection comprising: a well pipe comprising: a tubular pipe string having an inner pipe wall defining a longitudinal opening, where a compartment is provided radially in a radial groove in the inner pipe wall, and an inductive pipe element provided in the compartment, where the inductive pipe element is connected to an electric pipe circuit; and a well tool comprising: a tool body, where a groove is provided radially on the outside of the tool body, and an inductive tool element provided in the groove of the tool body, wherein the inductive tool element is connected to the tool body by a connection device, where the connection device allows the inductive tool element to move between a run state and a set state, where the inductive tool element is provided in the groove in the run state, wherein the inductive tool element is protruding radially out from the groove of the well tool and into the groove of the well pipe in the set state; and wherein the inductive pipe element and the inductive tool element are longitudinally and rotationally aligned in a communication position in the set state.