Linear Brushless Contact Slip For High Pressure and High Temperature Downhole Application |
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申请号 | US15518061 | 申请日 | 2014-11-18 | 公开(公告)号 | US20170298697A1 | 公开(公告)日 | 2017-10-19 |
申请人 | Halliburton Energy Services, Inc.; | 发明人 | Kar Ki Loh; | ||||
摘要 | A linear electrical contact slip structure for conducting electricity between two regions of a tool string while deployed within a wellbore. The linear electrical contact slip maintains an electrical connection between a piston structure and a collar structure, where either structure can be a stroker section or a stator section, and where the electrical connection is maintained when the stoker section is either stationary or in motion. The electrical connections between the piston and collar are grouped along the interior hollow surface of the collar, corresponding to contacts on the exterior of the piston head. The piston and collar are configured to prevent relative rotational motion, but to allow relative linear motion, by use of projections from the piston that match grooves in the collar. | ||||||
权利要求 | That which is claimed is: |
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说明书全文 | This disclosure relates to apparatus and systems for forming electrical connections, for either or both of conducting electricity and transmitting signals, between regions of a tool string deployed in hydrocarbon wells and other wells. In conventional wellbore or reservoir fluidic systems, a rotating slip ring can be used to transmit electrical current or signal from one region of a tool string to another region of a tool string deployed within a wellbore. The rotation of the slip ring, and in particular the contact of “brushes” between the rotating structure and non-rotating structure where the slip ring is located on the tool string, allows for the transmission of electricity across elements which are not necessarily moving in the same direction as each other. Traditionally, electrical connections to conductive elements such as brushes in a slip ring can be subject to tension and wear, particularly in high temperature or high pressure environments. Further, such structures can be isolated from the wellbore environment, requiring additional pressure control for the structure. Illustrative aspects of the present disclosure are described in detail below with reference to the following drawing figures. Certain aspects of the present disclosure relate to an electrical connection structure for a tool string, mandrel, or other such tubing apparatus deployed in a wellbore environment. As disclosed herein, a linear contact slip structure can include a collar and a piston, where the collar and piston are configured to move linearly in relation to each other, where one of either the collar or piston is the stator (static) section and the other is the stroker (dynamic) section. Each of the collar and piston have electrical contacts arranged to align such that an electrical connection is maintained between the stator section and the stroker section as either of the piston or collar move in a linear direction. Further, the structure of the piston includes a set of key projections extending outward from the longitudinal axis of the piston which match and couple with keyway grooves or channels in the collar structure, thereby maintaining a relative linear motion between the piston and collar without significant relative rotational motion between the two structures. The configuration of the collar and piston allow for an electrical connection between two regions of a tool string without the use either of brushes or a closed section as commonly known and used with rotary slip rings in the industry. Moreover, the linear motion of the electrical contact slip disclosed herein provides both for the use of wiring that does not require an amount of slack in the wire that can be physically challenging to accommodate and for a dynamic motion that avoids a degree of deformation wear that can damage such wiring. In many applications, the control of pressure on tools, sensors, or other apparatus along a tool string when deployed within a wellbore can be critical to maintain the operability of such tools, sensors, or apparatus. In some structures, a closed or pressure-isolated system is required to ensure operation of internal structures, such as electrical connections. In aspects of the present disclosure, the linear electrical contact slip has a collar structure which is hollow to receive and provide a range of motion for a piston. Such a structure can accordingly be also exposed or open to the surrounding wellbore environment, including the fluids, temperatures, and pressures within the wellbore. As the linear electrical contact slip of the present disclosure does not have a need to maintain a specifically controlled pressure for the operation of the electrical connections between a piston and collar, the linear electrical contact slip structure can function in relatively higher pressure environments than rotary contact slips known in the industry which need a closed, pressure-controlled system or contact interface. In further applications, the amount of wiring required for an electrical connection between two regions of a tool string deployed in a wellbore needs to include a length of slack to account for either or rotational and linear motion of either or both of the two regions of the tool string. For example, with a rotary contact slip that can travel a distance along the length of a tool string concurrently with rotating around a tool string, the amount of slack required in the wiring can cause the wiring to have a length equivalent to 150% or more of the linear distance the rotary contact slip can move. The amount of slack in the wiring can thereby add complexity to the tool string or rotary contact slip structure, increasing the volume of a structure holding the wiring in either or both of length or width (which can increase the diameter of the tool string as a whole). In alternative aspects of the present disclosure, either the piston or the collar of the linear electrical contact slip can be the stroker section, with the complementary structure being the stator section in a given aspect. In other words, aspects of the present disclosure can be constructed and operated to have the piston be the stroker section (i.e. the moving, dynamic structure) while the collar is the stator section (i.e. a static structure) of the linear electrical contact slip. Conversely, aspects of the present disclosure can be constructed and operated to have the collar be the stroker section (i.e. the moving, dynamic structure) while the piston is the stator section (i.e. a static or stationary structure) of the linear electrical contact slip. The determination to configure either the piston of the collar of the linear electrical contact slip as the stroker can be based on the individual design requirements of a tool string or environmental conditions of a wellbore. In further aspects, the linear electrical contact slip can be configured to switch the function and motion of either or both of the collar and piston when deployed downhole. In other words, a tool string with a linear electrical contact slip can be deployed in a wellbore with the piston configured to be the stroker section and the collar configured to be the stator section, and while deployed, the linear electrical contact slip can be controlled to switch the piston to be the stator section and the collar to be the stroker section, or vice versa. Further aspects of the present disclosure provide for a scalable structure, due in part to the linear configuration of the components. In some aspects, the linear electrical contact slips described herein can have an overall diameter (equivalent to the diameter of the collar structure) of from about one-and-a-half to about four inches (1.5″-4″). In other aspects, the linear electrical contact slips described herein can have an overall diameter that is greater than four inches (>4″). The number of contacts between a stator section and a stroker section can be determined by the diameter of any given linear electrical contact slip. In contrast, rotary slip rings as known in the industry can be limited in gauge or diameter. Similarly, the linear electrical contact slips described herein can be constructed to have an overall length that meets a needed or desired length of extension within a wellbore. In some aspects, a linear electrical contact slip can have a length of from about five inches to about forty inches (5″-40″) when retracted, i.e. the position where the piston structure is most surrounded by the collar structure, and the linear electrical contact slip is at its shortest. In other aspects, a linear electrical contact slip can have a length that is greater than forty inches (>40″) when retracted. When extended, i.e. at the position where the piston structure is least surrounded by the collar structure, and the linear electrical contact slip is at its longest, a linear electrical contact slip can have a length of extension where the extension ratio is 1:1 In other words, the stator section and the stroker section can be of equal length such that the length of the linear electrical contact slip when fully extended is double the length of the linear electrical contact slip when retracted. Accordingly, a linear electrical contact slip having a retracted length of about five inches (5″) would have an extended length of about ten inches (10″). Similarly, a linear electrical contact slip having a retracted length of about forty inches (40″) would have an extended length of about eighty inches (80″). In some aspects, the rate at which the linear electrical contact slip can extend or retract the stroker section can be about five inches per second (5″/sec). In further contrast to rotary slip rings as known in the industry, the linear electrical contact slip of the present disclosure provides for a structure that reduces debris formation. The rotation of rotary slip rings when deployed downhole can lead to the formation of debris due to the friction and motion of a rotary slip ring with surrounding earth strata. Such debris can settle, wedge, or reside in between the casing of a rotary slip ring and another section of the tool string assembly, thereby creating a blockage that can slow or stop the movement of the rotary slip ring and function of the tool string. Similarly, other debris from the wellbore or wellbore drilling process can settle, wedge, or reside in between the casing of a rotary slip ring and another section of the tool string assembly, with a similar result and challenge to operation. The linear electrical contact slip of the present disclosure can reduce the occurrence of such blockage and related slowing or stoppage due to either or both of the linear motion of the linear electrical contact slip, or the hollow structure of the linear electrical contact slip collar, which can allow some particulate matter or debris to pass through the linear electrical contact slip instead of blocking or jamming the interface between the linear electrical contact slip and other sections of a tool string. Moreover, the manufacturability of linear electrical contact slip structures, relative to rotary slip rings known in the industry can be less complicated and more consistent in quality. In particular contrast to rotary slip rings, the linear electrical contact slip is “brushless”, not requiring individual brush structures to maintain an electrical connection as one structure rotates relative to another. The size limitations on a rotary slip ring (relating to the size limitations of a wellbore) limits the size of its brushes, and thus the amount of current that can be consistently conducted through a rotary slip ring. The elimination of such brush structures reduces the relative complexity of the linear electrical contact slip and allows for a greater degree of scalability due to the linear nature of the contact regions described herein. The illustrative examples discussed herein are given to introduce the reader to the general subject matter discussed here and are not intended to limit the scope of the disclosed concepts. The following sections describe various additional aspects and examples with reference to the drawings in which like numerals indicate like elements, and directional descriptions are used to describe the illustrative aspects. The following sections use directional descriptions such as “uphole,” “upward,” “downhole,” “downward,” “inward,” “outward,” etc. in relation to the illustrative aspects as they are depicted in the figures, the uphole direction being toward the surface of the well, the downhole direction being toward the toe of the well, the inward direction being toward the longitudinal axis (which can also be referred to as the “primary axis” or “centerline”) of the tool string, casing, or mandrel, and the outward direction being away from the longitudinal axis of the tool string, casing, or mandrel. Further, portions of structural elements described herein can be referred to by their general orientation when deployed, e.g. an uphole end or downhole end. Similarly, portions of structural elements described herein can be referred to by their interior (inward facing) and exterior (outward facing) surfaces. Like the illustrative aspects, the numerals and directional descriptions included in the following sections should not be used to limit the present disclosure. In some aspects, the collar 110 can be oriented toward the uphole end of the wellbore 102, and can be coupled to an uphole tool string section 114. The uphole tool string section 114 can include uphole electrical leads 116 which can be electrically coupled to the linear electrical contact slip 108, and in particular aspects electrically coupled to the collar 110. The uphole electrical leads 116 can connect to other structures or sensors uphole along the tool string 106, and can further connect to a power source, a control interface, or other apparatus at the surface 103 of the wellbore 102. The piston 112 can be oriented toward the downhole end of the wellbore 102 (i.e. towards the toe of the well), and can be coupled to a downhole tool string section 118. The downhole tool string section 118 can include downhole electrical leads 120 which can be electrically coupled to the linear electrical contact slip 108, and in particular aspects electrically coupled to the piston 112. The downhole electrical leads 120 can connect to other structures or sensors downhole along the tool string 106. When a linear electrical contact slip 108 is deployed in a wellbore 102, either the collar 110 or the piston 112 can be the stator section or the stroker section. As illustrated in In alternative aspects, as shown in It is appreciated that, regardless of the orientation of the linear electrical contact slip 108, either the uphole end or downhole end of the of the linear electrical contact slip 108 can be considered a first end or a second end when referring to components of the linear electrical contact slip 108 such as, for example, the electrical leads, which may be referred to as a first set of electrical leads and a second set of electrical leads. Similarly, it is appreciated that regardless of whether a piston 112 structure or a collar 110 structure is a stroker section, the movement and range of motion of a stroker section between a base retracted position and a max extended position is overlapping with and within the length of a counterpart stator section. The structure of the piston electrical contact regions 214 can have a lead angle along the longitudinal axis of each piston electrical contact region 214, at both ends of the stroker electrical contact region 214. Where the collar electrical contact regions 216 are canted coils, the lead angle of the piston electrical contact region 214 structure can ensure the gradual deformation of the canted coil springs as the piston structure 204 moves in either linear direction (i.e. uphole or downhole) along the length of the linear electrical contact slip 200. The degree of deflection on a canted coil spring helps to ensure positive electrical contact as well as to lower any friction created between the piston electrical contact regions 214 and the collar electrical contact regions 216 during the linear motion. In some aspects, the collar structure 202 can have end coupling regions 218 on either or both ends of the collar structure 202 that allow the collar structure 202 to couple with uphole and downhole tool string sections. In such aspects, the end coupling regions 218 can be threaded to mechanically couple with complementary uphole and downhole tool string sections. In further aspects, the collar structure 202 can include exterior casing 220 that can provide additional protection for the first set of electrical leads 208, collar electrical contact regions 216, and overall piston structure 204 from the wellbore environment. Similarly, The piston head 316 can further include at least one key projection 324 which is configured to match with and fill in a keyway (not shown) in the collar body 306. The one or more key projections 324 of the piston head 316, due to being maintained in a specific orientation within the keyways of the collar body 306, thereby prevent rotational motion of either the stroker section or the stator section relative to each other, further operating to maintain the electrical connection between the elements of the collar structure 302 and the piston body 304 as the stroker section moves with linear motion 326. The interface of one or more piston electrical contacts 320 with one or more canted coils 310 reflects the lead angle along the longitudinal axis of each piston electrical contact 320 which can provide for gradual deformation of the canted coil 310 springs as the piston body 304 moves in either linear direction. The degree of deflection on a canted coil 310 spring in part allows for a contact force that helps to ensure positive electrical contact between the piston electrical contacts 320 and the canted coils 310 during the linear motion. In some aspects, the electrical contact between the piston electrical contacts 320 and the canted coils 310 can allow for a stable and consistent passage of current of up to thirty Amperes (30 A). The collar body 404 can have collar electrical leads 409 embedded within the material of the collar body, with embedded collar wiring 411 electrically connecting one or more of the contact slip housings 408 with one or more of the collar electrical leads 409. In some aspects, each contact slip housing 408 can be coupled through embedded collar wiring 411 to a single collar electrical lead 409. In other aspects, two or more contact slip housings 408 can be coupled through embedded collar wiring 411 to a single collar electrical lead 409. The distribution of electrical connections between the contact slip housings 408 and collar electrical leads 409 can be arranged to increase or otherwise control the conductivity of the electrical connection formed by the electrical connections between the contact slip housings 408 and collar electrical leads 409. An increase of conductivity between the contact slip housings 408 and collar electrical leads 409 can provide for relatively high power draw applications. Depending on the orientation and arrangement of a linear electrical contact slip, the collar electrical leads 409 can be a part of either uphole electrical leads or downhole electrical leads. In further aspects, the embedded collar wiring 411 can be an electrically conductive element such as a filament, an electrical bridge, an electrical tangency, or other metallic connection between a contact slip housing 408 and a collar electrical lead 409. The collar structure 400 is further formed to have a hollow space, referred to as a collar core 406, in which a piston structure can reside and move with a linear motion. Due to the designed architecture of the collar core 406 in the collar structure 400, electrically non-conductive hydraulic oil can pass through the collar structure 400 (and around any piston structure) in uphole and downhole directions. Therefore, the linear electrical contact slip of the present disclosure does not experience any pressure differential between the uphole end and downhole end of the collar structure 400. Similarly, the linear electrical contact slip of the present disclosure does not experience any pressure differential between the collar core 406 of the collar structure 400 and the region of a wellbore surrounding the collar structure 400. Accordingly, the linear electrical contact slip of the present disclosure can withstand the high pressures experienced in oil-filled wellbore applications without the need to actively control the pressure of the electrical contact regions, and without concern of structural collapse or failure of the linear electrical contact slip due to high pressures. The piston structure 414 can further electrically couple the piston electrical contacts 418 to piston electrical leads 419 via embedded piston wiring 417 embedded within the piston structure 414. In some aspects, each piston electrical contact 418 can be coupled through embedded piston wiring 417 to a single piston electrical lead 419. In other aspects, two or more piston electrical contacts 418 can be coupled through embedded piston wiring 417 to a piston electrical lead 419. In further aspects, the piston electrical leads 419 can further connect to the a conductive metal housing 422 surrounding the interior surface of the piston structure 414, and which can define a hollow space, referred to as a piston core 424, of the piston head 416 and connected piston shaft. Either or both of the piston electrical leads 419 and conductive metal housing 422 can extend along the piston shaft to a terminus at an opposing end of the piston. Depending on the orientation and arrangement of a linear electrical contact slip, the piston electrical leads 419 can be a part of either uphole electrical leads or downhole electrical leads. In further aspects, the embedded piston wiring 417 can be an electrically conductive element such as a filament, an electrical bridge, an electrical tangency, or other metallic connection between a piston electrical contact 418 and a piston electrical lead 419. Considered in combination, As further illustrated in The collar body 504 can have collar electrical leads 509 embedded within the material of the collar body, with embedded collar wiring 511 electrically connecting one or more of the contact slip housings 508 with one or more of the collar electrical leads 509. In some aspects, each contact slip housing 508 can be coupled through embedded collar wiring 511 to a single collar electrical lead 509. In other aspects, two or more contact slip housings 508 can be coupled through embedded collar wiring 511 to a single collar electrical lead 509. The distribution of electrical connections between the contact slip housings 508 and collar electrical leads 509 can be arranged to increase or otherwise control the conductivity of the electrical connection formed by the electrical connections between the contact slip housings 508 and collar electrical leads 509. An increase of conductivity between the contact slip housings 508 and collar electrical leads 509 can provide for relatively high power draw applications. Depending on the orientation and arrangement of a linear electrical contact slip, the collar electrical leads 509 can be a part of either uphole electrical leads or downhole electrical leads. In further aspects, the embedded collar wiring 511 can be an electrically conductive element such as a filament, an electrical bridge, an electrical tangency, or other metallic connection between a contact slip housing 508 and a collar electrical lead 409. The collar structure 500 is further formed to have a hollow space, referred to as a collar core 506, in which a piston structure can reside and move with a linear motion. Due to the designed architecture of the collar core 506 in the collar structure 500, electrically non-conductive hydraulic oil can pass through the collar structure 500 (and around any piston structure) in uphole and downhole directions. Therefore, the linear electrical contact slip of the present disclosure does not experience any pressure differential between the uphole end and downhole end of the collar structure 500. Similarly, the linear electrical contact slip of the present disclosure does not experience any pressure differential between the collar core 506 of the collar structure 500 and the region of a wellbore surrounding the collar structure 500. Accordingly, the linear electrical contact slip of the present disclosure can withstand the high pressures experienced in oil-filled wellbore applications without the need to actively control the pressure of the electrical contact regions, and without concern of structural collapse or failure of the linear electrical contact slip due to high pressures. The piston structure 514 can further electrically couple the piston electrical contacts 518 to piston electrical leads 519 via embedded piston wiring 517 embedded within the piston structure 514. In some aspects, each piston electrical contact 518 can be coupled through embedded piston wiring 517 to a single piston electrical lead 519. In other aspects, two or more piston electrical contacts 518 can be coupled through embedded piston wiring 517 to a piston electrical lead 519. In further aspects, the piston electrical leads 519 can further connect to the a conductive metal housing 522 surrounding the interior surface of the piston structure 514, and which can define a hollow space, referred to as a piston core 524, of the piston head 516 and connected piston shaft. Either or both of the piston electrical leads 519 and conductive metal housing 522 can extend along the piston shaft to a terminus at an opposing end of the piston. Depending on the orientation and arrangement of a linear electrical contact slip, the piston electrical leads 519 can be a part of either uphole electrical leads or downhole electrical leads. In further aspects, the embedded piston wiring 517 can be an electrically conductive element such as a filament, an electrical bridge, an electrical tangency, or other metallic connection between a piston electrical contact 518 and a piston electrical lead 519. Considered in combination, As further illustrated in The collar body 604 can have collar electrical leads 609 embedded within the material of the collar body, with embedded collar wiring 611 electrically connecting one or more of the contact slip housings 608 with one or more of the collar electrical leads 609. In some aspects, each contact slip housing 608 can be coupled through embedded collar wiring 611 to a single collar electrical lead 609. In other aspects, two or more contact slip housings 608 can be coupled through embedded collar wiring 611 to a single collar electrical lead 609. The distribution of electrical connections between the contact slip housings 608 and collar electrical leads 609 can be arranged to increase or otherwise control the conductivity of the electrical connection formed by the electrical connections between the contact slip housings 608 and collar electrical leads 609. An increase of conductivity between the contact slip housings 608 and collar electrical leads 609 can provide for relatively high power draw applications. Depending on the orientation and arrangement of a linear electrical contact slip, the collar electrical leads 609 can be a part of either uphole electrical leads or downhole electrical leads. In further aspects, the embedded collar wiring 611 can be an electrically conductive element such as a filament, an electrical bridge, an electrical tangency, or other metallic connection between a contact slip housing 608 and a collar electrical lead 609. The collar structure 600 is further formed to have a hollow space, referred to as a collar core 606, in which a piston structure can reside and move with a linear motion. Due to the designed architecture of the collar core 606 in the collar structure 600, electrically non-conductive hydraulic oil can pass through the collar structure 600 (and around any piston structure) in uphole and downhole directions. Therefore, the linear electrical contact slip of the present disclosure does not experience any pressure differential between the uphole end and downhole end of the collar structure 600. Similarly, the linear electrical contact slip of the present disclosure does not experience any pressure differential between the collar core 606 of the collar structure 600 and the region of a wellbore surrounding the collar structure 600. Accordingly, the linear electrical contact slip of the present disclosure can withstand the high pressures experienced in oil-filled wellbore applications without the need to actively control the pressure of the electrical contact regions, and without concern of structural collapse or failure of the linear electrical contact slip due to high pressures. The piston structure 614 can further electrically couple the piston electrical contacts 618 to piston electrical leads 619 via embedded piston wiring 617 embedded within the piston structure 614. In some aspects, each piston electrical contact 618 can be coupled through embedded piston wiring 617 to a single piston electrical lead 619. In other aspects, two or more piston electrical contacts 618 can be coupled through embedded piston wiring 617 to a piston electrical lead 619. In further aspects, the piston electrical leads 619 can further connect to the a conductive metal housing 622 surrounding the interior surface of the piston structure 614, and which can define a hollow space, referred to as a piston core 624, of the piston head 616 and connected piston shaft. Either or both of the piston electrical leads 619 and conductive metal housing 622 can extend along the piston shaft to a terminus at an opposing end of the piston. Depending on the orientation and arrangement of a linear electrical contact slip, the piston electrical leads 619 can be a part of either uphole electrical leads or downhole electrical leads. In further aspects, the embedded piston wiring 617 can be an electrically conductive element such as a filament, an electrical bridge, an electrical tangency, or other metallic connection between a piston electrical contact 618 and a piston electrical lead 619. Considered in combination, As further illustrated in The collar body 704 can have collar electrical leads 709 embedded within the material of the collar body, with embedded collar wiring 711 electrically connecting one or more of the contact slip housings 708 with one or more of the collar electrical leads 709. In some aspects, each contact slip housing 708 can be coupled through embedded collar wiring 711 to a single collar electrical lead 709. In other aspects, two or more contact slip housings 708 can be coupled through embedded collar wiring 711 to a single collar electrical lead 709. The distribution of electrical connections between the contact slip housings 708 and collar electrical leads 709 can be arranged to increase or otherwise control the conductivity of the electrical connection formed by the electrical connections between the contact slip housings 708 and collar electrical leads 709. An increase of conductivity between the contact slip housings 708 and collar electrical leads 709 can provide for relatively high power draw applications. Depending on the orientation and arrangement of a linear electrical contact slip, the collar electrical leads 709 can be a part of either uphole electrical leads or downhole electrical leads. In further aspects, the embedded collar wiring 711 can be an electrically conductive element such as a filament, an electrical bridge, an electrical tangency, or other metallic connection between a contact slip housing 708 and a collar electrical lead 709. The collar structure 700 is further formed to have a hollow space, referred to as a collar core 706, in which a piston structure can reside and move with a linear motion. Due to the designed architecture of the collar core 706 in the collar structure 700, electrically non-conductive hydraulic oil can pass through the collar structure 700 (and around any piston structure) in uphole and downhole directions. Therefore, the linear electrical contact slip of the present disclosure does not experience any pressure differential between the uphole end and downhole end of the collar structure 700. Similarly, the linear electrical contact slip of the present disclosure does not experience any pressure differential between the collar core 706 of the collar structure 700 and the region of a wellbore surrounding the collar structure 700. Accordingly, the linear electrical contact slip of the present disclosure can withstand the high pressures experienced in oil-filled wellbore applications without the need to actively control the pressure of the electrical contact regions, and without concern of structural collapse or failure of the linear electrical contact slip due to high pressures. The piston structure 714 can further electrically couple the piston electrical contacts 718 to piston electrical leads 719 via embedded piston wiring 717 embedded within the piston structure 714. In some aspects, each piston electrical contact 718 can be coupled through embedded piston wiring 717 to a single piston electrical lead 719. In other aspects, two or more piston electrical contacts 718 can be coupled through embedded piston wiring 717 to a piston electrical lead 719. In further aspects, the piston electrical leads 719 can further connect to the a conductive metal housing 722 surrounding the interior surface of the piston structure 714, and which can define a hollow space, referred to as a piston core 724, of the piston head 716 and connected piston shaft. Either or both of the piston electrical leads 719 and conductive metal housing 722 can extend along the piston shaft to a terminus at an opposing end of the piston. Depending on the orientation and arrangement of a linear electrical contact slip, the piston electrical leads 719 can be a part of either uphole electrical leads or downhole electrical leads. In further aspects, the embedded piston wiring 717 can be an electrically conductive element such as a filament, an electrical bridge, an electrical tangency, or other metallic connection between a piston electrical contact 718 and a piston electrical lead 719. Considered in combination, As further illustrated in While In some aspects, the present disclosure is directed to a linear electrical contact slip structure of a tool string, having: a piston structure, coupled to an uphole tool string section having uphole electrical leads, the piston structure providing one or more piston electrical contact regions that are electrically coupled to the uphole electrical leads; a collar structure, coupled to a downhole tool string section having downhole electrical leads, the collar structure providing one or more collar electrical contact regions that are electrically coupled to the downhole electrical leads; the one or more piston electrical contact regions and the one or more collar electrical contact regions arranged to maintain electrical communication where either of the piston structure or the collar structure are stationary or in motion. In particular aspects, the piston structure can be a stroker section and the collar structure can be a stator section. In alternative aspects, the collar structure can be a stroker section and the piston structure can be a stator section. In some aspects, the piston structure can have one or more key projections and one or more piston electrical contact regions, where the collar structure can have one or more keyways and one or more collar electrical contact regions. In other aspects, the piston structure can have three key projections and three groupings of piston electrical contact regions, where the collar structure can have three keyways and three groupings of collar electrical contact regions. In alternative aspects, the piston structure can have four key projections and four piston electrical contact regions, where the collar structure has four keyways and four collar electrical contact regions. In further aspects, the piston structure can have three key projections and two piston electrical contact regions, where the collar structure has three keyways and two collar electrical contact regions. In yet further aspects, the piston structure can have three key projections and four piston electrical contact regions, where the collar structure has three keyways and four collar electrical contact regions. In further aspects, one or more collar electrical contact regions can be canted coils. In other aspects, the present disclosure is directed to a linear electrical contact slip structure of a tool string, having: a collar structure, coupled to an uphole tool string section having uphole electrical leads, the collar structure providing one or more collar electrical contact regions that are electrically coupled to the uphole electrical leads; a piston structure, coupled to a downhole tool string section having downhole electrical leads, the piston structure providing one or more piston electrical contact regions that are electrically coupled to the downhole electrical leads; the one or more collar electrical contact regions and the one or more piston electrical contact regions arranged to maintain electrical communication where either of the collar structure or the piston structure are stationary or in motion. In particular aspects, the piston structure can be a stroker section and the collar structure can be a stator section. In alternative aspects, the collar structure can be a stroker section and the piston structure can be a stator section. In some aspects, wherein the piston structure can have one or more key projections and one or more piston electrical contact regions, where the collar structure can have one or more keyways and one or more collar electrical contact regions. In other aspects, the piston structure can have three key projections and three groupings of piston electrical contact regions, where the collar structure can have three keyways and three groupings of collar electrical contact regions. In alternative aspects, the piston structure can have four key projections and four piston electrical contact regions, where the collar structure can have four keyways and four collar electrical contact regions. In further aspects, the piston structure can have three key projections and two piston electrical contact regions, where the collar structure has three keyways and two collar electrical contact regions. In yet further aspects, the piston structure can have three key projections and four piston electrical contact regions, where the collar structure has three keyways and four collar electrical contact regions. In some aspects, one or more collar electrical contact regions can be canted coils. In further aspects, the present disclosure is directed to a system for conducting electricity across a linear electrical contact slip structure, where the system has: a stator section, electrically coupled to a first set of electrical leads; a stroker section, mechanically coupled to the stator section and arranged to move within a range of motion relative to the stator section, and electrically coupled to a second set of electrical leads; where the first set of electrical leads pass through the stator section, and where the second set of electrical leads pass through the stroker section, such that the first set of electrical leads and the second set of electrical leads are electrically coupled and maintain electrical communication while the stroker section is either stationary or in motion. In some aspects, the motion of the stroker section relative to the stator section can be linear. In other aspects, the motion of the stroker section can be controlled to not rotate relative to the stator section. In further aspects, a current of up to 30 A can be conducted through the linear electrical contact slip structure. In some aspects, where the stroker section can be a piston structure that can be actuated to move relative to a collar structure that is a stator section. In other aspects, the stroker section can be a collar structure that can be actuated to move relative to a piston structure that is the stator section. The subject matter of aspects and examples of this patent is described here with specificity to meet statutory requirements, but this description is not necessarily intended to limit the scope of the claims. The claimed subject matter may be embodied in other ways, may include different elements or steps, and may be used in conjunction with other existing or future technologies. Throughout this description for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of examples and aspects of the subject matter disclosed herein. It will be apparent, however, to one skilled in the art that the many examples or aspects may be practiced without some of these specific details. In some instances, structures and devices are shown in diagram or schematic form to avoid obscuring the underlying principles of the described examples or aspects. This description should not be interpreted as implying any particular order or arrangement among or between various steps or elements except when the order of individual steps or arrangement of elements is explicitly described. With these aspects in mind, it will be apparent from this description that aspects of the described techniques may be embodied, at least in part, in software, hardware, firmware, or any combination thereof. It should also be understood that aspects can employ various computer-implemented functions involving data stored in a data processing system. That is, the techniques may be carried out in a computer or other data processing system in response executing sequences of instructions stored in memory. In various aspects, hardwired circuitry may be used independently, or in combination with software instructions, to implement these techniques. For instance, the described functionality may be performed by specific hardware components, such as a control unit for actuating a stroker section of a tool string system, containing hardwired logic for performing operations, or by any combination of custom hardware components and programmed computer components. The techniques described herein are not limited to any specific combination of hardware circuitry and software. The foregoing description of the disclosure, including illustrated aspects and examples has been presented only for the purpose of illustration and description and is not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Numerous different modifications, adaptations, and arrangements of the components depicted in the drawings or described above, as well as components and steps not shown or described, are possible. Similarly, some features and subcombinations are useful and may be employed without reference to other features and subcombinations. Examples and aspects of the subject matter have been described for illustrative and not restrictive purposes, and alternative examples or aspects will become apparent to those skilled in the art without departing from the scope of this disclosure. Accordingly, the present subject matter is not limited to the examples or aspects described above or depicted in the drawings, and various embodiments, examples, aspects, and modifications can be made without departing from the scope of the claims below. |