Cable extension-cord box for submersible-motor cable line

FIELD: electrical engineering; electrical connections to supply power to submersible pump motor for extracting stratum liquid.

SUBSTANCE: proposed cable extension-cord box of submersible motor cable line that suffers in operation high hydrostatic pressure and temperature has box proper accommodating cable fixed in position by means of fastening member; cable has conductors and terminal block provided with holes to receive cable lugs and conductors connected to them; at least one of joints between cable conductors and lugs is disposed in terminal block hole at distance L ≥ 0.5 d, where d is cable conductor diameter, from butt-end surface of block disposed closer to supporting member additionally installed in cable box and provided with holes to receive cable conductors.

EFFECT: enhanced reliability and service life, enlarged functional capabilities of device.

20 cl, 8 dwg, 1 tbl

 

The invention relates to electrical engineering and can be used, in particular, in electrical connections intended for the supply of electricity to the electric motors of submersible pumps for the extraction of the reservoir fluid.

Known electrical connector, cable plug which consists of an insulator made of an elastic material such as rubber, with tightly defined therein contact elements and covering the insulator, a metal shell mounted on the cable, and the sealing elements (A.S. USSR №680090, H 01 R 13/52, BI No. 30 1979) is similar.

The disadvantage of this design is the lack of reliability of the cable plugs due to low integrity of adhesive joints and low electric strength, the complexity of manufacturing and low manufacturability of the design of the fork that does not allow them to be used in installations using a submersible electric pumps for pressure-tight connection of supply cables for submersible motors, working in oil or water wells.

Known extension cable with coupler, with metal housing, soldered tin solder to cable extension cable, insulated conductor which is hermetically sealed in the housing with a rubber gasket sandwiched between the washers and nut. At the ends comprobadas the wires of the cable are fixed by means of threaded connections plug tips. Threaded connections allow us to recover the exact dimensions of the couplings when the shrinkage of the insulation of the cable and axial displacements themselves lived without alteration of the coupling. With the loss of tightness of the coupling can be restored by the preload of the seal through the washer nut (Ivanov V.N., Derishev VI and other "Borehole pumping units for oil extraction", M. sue, Izd-vo "Oil and gas state oil and gas University. After Gubkin, 2002, str-226) is similar.

The disadvantages of this design are

connection cable conductors with contact elements carried out outside the clutch housing cable extension, which does not allow to use it for the supply of electricity to the electric motors of submersible pumps, for example, for the production of reservoir fluid.

- use metal backup washer that when it compresses the rubber seal cuts into the insulation of the wires of the cable and reduces the dielectric strength;

- using a rubber seal, elasticity after compression causes the shrinkage of the insulation of the cable during operation in the well and, as a rule, loss of tightness;

- the use of time-consuming soldering armor of the cable to the clutch housing tin which records only the armor wires longitudinally move during bending of the cable and the clutch loses mounting dimensions;

- the design of a suitable coupling is only for cables with polymeric insulation.

The invention solves the problem of increasing the reliability and durability of the device when operating in conditions of high hydrostatic pressure and temperature, expanding its operational capabilities.

To achieve the technical result in the clutch cable extension cable line submersible electric motor, comprising a housing located therein secured with the locking element cable with conductors and nuts, which made the holes for the placement of tips and tendons attached to the cable, at least one of the joints of the wires of the cable and lugs located in the hole of the pad at a distance of L≥0,5d, where d is the diameter of the cable core from the end surface pads located closer to the support element, additionally installed in the clutch housing and containing holes to accommodate lived cable.

In the clutch cable extension support element may be made in the form of washers.

In the clutch cable extension support element may be made of insulating material.

In the clutch cable extension as insulating material may be used a material whose dielectric constant which is not less than the dielectric constant of the material of the cable strands.

In coupling cabeling the extension of the supporting element can be made of fiberglass or fiberglass or Teflon.

In the clutch cable extension holes in the block can be performed stepwise.

In the clutch cable extension, at least part of the holes in the pad may be in the form of a truncated cone and having a depth of N>d.

In the clutch cable extension block may be made of a material with an electric resistance of at least 20 KV/mm

In the clutch cable extension block may be made of Teflon or a material based on PTFE.

In the clutch cable extension block may be made of carbon fiber.

In the clutch cable extension number of joints cable conductors and contact elements located at a depth of L does not exceed the number of cable cores.

In the clutch cable extension between the block and the supporting member can be placed, at least one sealing element.

In the clutch cable extension sealing element can be made in the form of washers.

In the clutch cable extension sealing element may be made of silicone or nitrile butadiene rubber.

In the clutch cable extension sealing element may be made of rubber based silicone elastomer.

In the clutch cable extension sealing elements may be made from materials with different coefficients of linear shrinkage.

The clutch cable is on the strip between the strip and the conductors can be placed element of heat-shrink material.

In the clutch cable extension as a heat shrinkable material may be used polyvinylidene Fluor.

The proposed device is illustrated in the drawings, figure 1-8.

Figure 1 shows a longitudinal section of the clutch cable extension cord with multiple sealing elements.

Figure 2-5 shows various embodiments of element I in figure 1.

Figure 6 shows a figure 1.

7 shows a view B in figure 1 (without the lid).

Fig 8 shows prepared for connection with cable lugs.

Clutch cable extension cable line submersible electric motor includes a housing 1 in which are located the cable with 2 conductors 3 and 4, secured with the locking element 5 and the pad 6 made in her holes 7 and 8 to accommodate the lugs 9 and 10, attached to the cores 3 and 4 of the cable 2. At least one of the joints 11 veins 3 and 4 of the cable 2 and the lugs 9 and 10 is, for example, in the hole 7 of the pad 6 at a distance of L≥0,5d from its end surface that is located closer to the additionally installed in the body 1 of the coupling of the supporting element 12. Between the support element 12 and the pad 6 is placed sealing elements (one or more) 13, 14 and 15. Clutch cable extension cable line submersible electric motor provided with a cover 16, which binds to the bosom 1 through the sealing element 17. Depending on the external conditions and design features of submersible electric motors constructive execution of the sealing element can be different and, in addition, the number of sealing elements may be more than one. Pad 6 is attached to the housing 1 by means of the fastening element 18, for example a nut.

The depth of the joints of the wires of the cable 2 and the tip in the hole 7 pads 6 on the distance L is proved as follows.

The placement of the joints at a depth of less than L will reduce the durability and reliability of the device due to the increased probability of breakdown of insulation between adjacent conductors and between the conductors and the housing. The maximum depth of the location of the joints is limited in each case, on the one hand, the reliability of the device, for example, his integrity, and on the other hand, the manufacturability of the device in General and housing in particular.

In the case of placement in the case 1 of several sealing elements 13, 14 and 15, they can be made of materials with different thermal expansion.

You can use the rubber seals of the homogeneous materials with coefficients of linear shrinkage not more than 2.5-3% and a temperature range from -60° (C) to (+350°). Otherwise, for EXT is tion temperature range storage and operating couplers cable extension cable is provided for use as rubber seals, rubber with different coefficients of linear shrinkage, including inverse.

In block 6, at least part of the holes may be in the form of a truncated cone. The conical shape of the holes in the socket of the coupling side of the cable is a constructive element, designed to improve the tightness of the product. Given the current allowable variation of geometric dimensions of the thickness of the insulating coating and the wires of the cable and hole sizes, the pads formed during their manufacture, reduces the tightness of the product. The use of conical holes eliminates this defect in the clutch Assembly.

In block 6 between the surface having a conical shape, and residential cable can be placed item 19 of termousazhivaemoy material. This is because during the cutting end of the cable when removing the lead sheath may be damaged insulation coating lived. The failure of cable extenders can occur as a result of the breakdown between conductors of this section by reason of the occurrence of leakage currents on the surface of the insulation. Heat shrink tubing protects the insulation layer of the cable strands, for example, from the lead sheath to the tip, thereby creating additional insulation lived and reducing the possibility of surface leakage currents. Heat resistant coating under heat shrink tube does not give conden aromatica moisture when heat-treated and enhances tight and insulating properties clutch cable extension cable line submersible electric motor.

Clutch cable extension cable line submersible electric motor are collected in the following sequence.

First, prepare the ends of the cable 2 to connect with the lugs 9 and 10, which arches veins 3 and 4 of the cable 2 under the molding unit, cut off the ends of the cable at an equal distance from the reservation, compare the length of all the wires of the cable and removed from the conductor insulation. Each strand thread, followed by connection of the cores 3 and 4 of the cable 2 and the lugs 9 and 10. On the insulation 3 and 4 is applied, temperature-resistant coating, install heat shrinkable elements 19 on the veins, are shrinking and install the clutch housing. After that, in case 1 clutch set supporting element 12 and the sealing elements, the number of which is determined on the basis of the technological features of manufacture and use of these devices and their working conditions. Set on the lugs 9 and 10, block 6. Put the lid 16 and tighten the nut 18. After Assembly, the device is checked for leaks and tested high voltage. After which the device is fixed cable 2 in the housing 1 by means, for example, a polymer compound, and pour it into the body 1 of the coupling to the support element 12, which may be performed, for example, in the form of a washer.

The inventive clutch cable will extend the La cable line submersible electric motor intended for supply of electricity to the electric motors of submersible pumps for mining, reservoir fluid and can provide the claimed technical result when the following operating conditions.

The reservoir fluid is a mixture of oil, produced water and gas with a maximum density of 1500 kg/cm3.

The temperature of the pumping fluid is not more than 160°C.

Working voltage cable with insulation of EGM - W.

Operating temperature (-60) to (+200)°C.

Features cable extenders, made on the basis of the cables listed in table No. 1.

0,27
Table No. 1.
Technical

features

cable

extension
Type

cable*
Length of cable extension (m)
17253035404550
Resistance

isolation,

not less IOM
1 and 21470001000008300071400625005600050000
382400560004670040000350003100028000
Maximum

leakage current,

µa
1 and 20,10,150,180,210,240,3
30,180,280,320,380,430,480,54
* type of cable, extension cable (1 - KBP-90, 2 - KPPP-120, 3 - APAP-230).

The use of the proposed cable extension cable line submersible electric motor allows you to increase its durability, including, in conditions of significant quantities of hydrostatic pressure and temperature of the pumped medium, for example the reservoir fluid, not less than 30% compared to similar devices of the same purpose.

1. Clutch cable extension cable line submersible electric motor comprising a housing in which are secured with the locking element cable with conductors and pad with holes in it to accommodate the contact elements and tendons attached to the cable, wherein at least one of the joints of the wires of the cable and the contact elements located in the hole of the pad at a distance of L≥0.5 d, where d is the diameter of the cable core from the end surface pads located closer to the additionally installed in the clutch housing and containing holes to accommodate the wires of the cable support element.

2. Clutch cable extension according to claim 1, the call is connected with the fact, that the supporting element is made in the form of washers.

3. Clutch cable extension according to claim 1, characterized in that the supporting element is made of an electrically insulating material.

4. Clutch cable extension according to claim 3, characterized in that, as the insulating material used material, the dielectric constant of which is not less than the dielectric constant of the material of the cable strands.

5. Clutch cable extension according to claim 1, characterized in that the supporting element is made of fiberglass, or fiberglass, or PTFE.

6. Clutch cable extension according to claim 1, characterized in that the holes in the block are executed step.

7. Clutch cable extension according to claim 6, characterized in that at least part of the holes in the block has the shape of a truncated cone.

8. Clutch cable extension according to claim 7, characterized in that the depth is made in the block hole, having a cone shape, is N>d.

9. Clutch cable extension according to claim 1, wherein the pad is made from a material with an electric resistance of at least 20 kV/mm

10. Clutch cable extension according to claim 1, wherein the pad is made of Teflon or a material based on PTFE.

11. Clutch cable extension according to claim 1, wherein the pad is made of carbon fiber.

12 Clutch cable extension according to claim 1, characterized in that the number of joints cable conductors and contact elements located at a depth of L does not exceed the number of cable cores.

13. Clutch cable extension according to claim 1, characterized in that between the block and the supporting member is placed at least one sealing element.

14. Clutch cable extension for item 13, characterized in that the sealing element is designed in the form of a washer.

15. Clutch cable extension for item 13, characterized in that the sealing element is made of silicone rubber.

16. Clutch cable extension for item 13, characterized in that the sealing element is made of on BNR rubber.

17. Clutch cable extension for item 13, characterized in that the sealing element is made of rubber based silicone elastomer.

18. Clutch cable extension for item 13, characterized in that the sealing elements are made of different materials with different coefficients of linear shrinkage.

19. Clutch cable extension according to claim 1, characterized in that between the block and conductors placed the element of heat-shrink material.

20. Clutch cable extension according to claim 19, characterized in that as the heat shrinkable material is polyvinylidene fluoride.



 

Same patents:

FIELD: electrical engineering.

SUBSTANCE: proposed junction module has independent connecting member inserted in jacks which are connected to modular members incorporated in operating and protective equipment of transformer substations and power distribution systems. Each connecting member has external flexible shroud accommodating conducting ring wherein plurality of conducting parts are installed and passed through ring channels. Mentioned conducting parts are assembled in bundle for its axial displacement and turning in ring which makes it possible to wire and connect them to respective contact leads provided in jacks and related to each of adjacent members.

EFFECT: eliminated leakage of protective gas during junction due to reliable sealing and insulation of joint.

6 cl, 7 dwg

FIELD: electrical engineering; drilling and servicing inclined and horizontal oil-gas wells.

SUBSTANCE: proposed cable connector specially designed to prevent ingress of conducting medium (drilling mud) into its interior thereby ensuring reliable insulation of contacts from environment and preventing electric current leakage (leakage resistance being minimum 50 - 100 Megohms), or poor contact between connector mating parts has pin section and jack section with contact members inside them, as well as membrane. Jack section is made in the form of cylindrical shroud with stepped inner space accommodating contacts made in the form of flexible split rings secured on flexible cross-arms, flexible membrane disposed at pin section joint, and spring-loaded sealing ring mounted within shroud for displacement. Inner space of jack section is filled with insulating liquid. Cylindrical pin section has conical end; diameter of pin cylindrical part is larger than inner diameter of sealing ring.

EFFECT: enhanced tightness and reliability of contact between mating parts of connector.

1 cl, 4 dwg

FIELD: cable jointing devices.

SUBSTANCE: cable jointing box provided with through duct to receive respective cable end mounts cup-shaped electric contact whose edge forms hold-down ring tightly enclosing reduced-diameter box section. Naked conducting member is placed between electric contact and box section. Hold-down ring is squeezed to tighten up joint between duct wall and cable sheath. Tightening sleeve is capable of holding two boxes, each being connected to cable through respective electric contacts. Sleeve provides for tight joint between interrelated cable parts in region bounded by sleeve and boxes.

EFFECT: enhanced quality of wire-to-cable joint.

8 cl, 10 dwg

FIELD: plug connectors for cables of subsurface workings of mines.

SUBSTANCE: proposed cable-terminating plug forms hollow plug socket of brass whose hollow section on cable end forms cable entry hole and has supporting collar that functions to support male connecting member projection in axial direction. Cable entry hole is provided with inner thread for turning in metal tetrahedron that has through hole for cable entry. Cable screen or armor can be placed between through hole and cable sheath to ensure adequate grounding of cable and cable plug. Inner space of plug socket is sealed by means of shaped part molded on cable sheath, on plug socket, and on polyhedron. Shaped part is also used for securing cable in axial direction on plug socket.

EFFECT: ability of long-time service in damp media due to reliable sealing attained by simple means.

13 cl, 3 dwg

The invention relates to the field of electrical engineering

The invention relates to energy, in particular, to electrical switching apparatus, and can be used in power plants operating in vacuum conditions, at elevated temperatures and providing a sealed connection, operating at temperatures up to 800With high mechanical loads

Plug connection // 2231184
The invention relates to a plug connection for connecting a cable in underground mining

The invention relates to antenna-feeder path and is designed to protect the RF connector, consisting of a socket and plug, and sealing cables in the wall socket and plug

The invention relates to a sealed shields cable splices and has a body made therein shaped hole

FIELD: plug connectors for cables of subsurface workings of mines.

SUBSTANCE: proposed cable-terminating plug forms hollow plug socket of brass whose hollow section on cable end forms cable entry hole and has supporting collar that functions to support male connecting member projection in axial direction. Cable entry hole is provided with inner thread for turning in metal tetrahedron that has through hole for cable entry. Cable screen or armor can be placed between through hole and cable sheath to ensure adequate grounding of cable and cable plug. Inner space of plug socket is sealed by means of shaped part molded on cable sheath, on plug socket, and on polyhedron. Shaped part is also used for securing cable in axial direction on plug socket.

EFFECT: ability of long-time service in damp media due to reliable sealing attained by simple means.

13 cl, 3 dwg

FIELD: cable jointing devices.

SUBSTANCE: cable jointing box provided with through duct to receive respective cable end mounts cup-shaped electric contact whose edge forms hold-down ring tightly enclosing reduced-diameter box section. Naked conducting member is placed between electric contact and box section. Hold-down ring is squeezed to tighten up joint between duct wall and cable sheath. Tightening sleeve is capable of holding two boxes, each being connected to cable through respective electric contacts. Sleeve provides for tight joint between interrelated cable parts in region bounded by sleeve and boxes.

EFFECT: enhanced quality of wire-to-cable joint.

8 cl, 10 dwg

FIELD: electrical engineering; drilling and servicing inclined and horizontal oil-gas wells.

SUBSTANCE: proposed cable connector specially designed to prevent ingress of conducting medium (drilling mud) into its interior thereby ensuring reliable insulation of contacts from environment and preventing electric current leakage (leakage resistance being minimum 50 - 100 Megohms), or poor contact between connector mating parts has pin section and jack section with contact members inside them, as well as membrane. Jack section is made in the form of cylindrical shroud with stepped inner space accommodating contacts made in the form of flexible split rings secured on flexible cross-arms, flexible membrane disposed at pin section joint, and spring-loaded sealing ring mounted within shroud for displacement. Inner space of jack section is filled with insulating liquid. Cylindrical pin section has conical end; diameter of pin cylindrical part is larger than inner diameter of sealing ring.

EFFECT: enhanced tightness and reliability of contact between mating parts of connector.

1 cl, 4 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed junction module has independent connecting member inserted in jacks which are connected to modular members incorporated in operating and protective equipment of transformer substations and power distribution systems. Each connecting member has external flexible shroud accommodating conducting ring wherein plurality of conducting parts are installed and passed through ring channels. Mentioned conducting parts are assembled in bundle for its axial displacement and turning in ring which makes it possible to wire and connect them to respective contact leads provided in jacks and related to each of adjacent members.

EFFECT: eliminated leakage of protective gas during junction due to reliable sealing and insulation of joint.

6 cl, 7 dwg

FIELD: electrical engineering; electrical connections to supply power to submersible pump motor for extracting stratum liquid.

SUBSTANCE: proposed cable extension-cord box of submersible motor cable line that suffers in operation high hydrostatic pressure and temperature has box proper accommodating cable fixed in position by means of fastening member; cable has conductors and terminal block provided with holes to receive cable lugs and conductors connected to them; at least one of joints between cable conductors and lugs is disposed in terminal block hole at distance L ≥ 0.5 d, where d is cable conductor diameter, from butt-end surface of block disposed closer to supporting member additionally installed in cable box and provided with holes to receive cable conductors.

EFFECT: enhanced reliability and service life, enlarged functional capabilities of device.

20 cl, 8 dwg, 1 tbl

FIELD: devices for formation of electrical connections in vehicles; the repair kit is designated for repair of a failed electrical device of a vehicle connected to the vehicle electrical equipment system by several wires.

SUBSTANCE: the repair kit has a new electrical device installed instead of the failed one, several wires connected to the new electrical device and a built-up protective box designated for protection of the electrical connection made by joining of the wires of the new electrical device and the wires of the vehicle electrical equipment system. The built-up protective box has a body with several holes insulated from one another. The packing rings positioned in each hole of the body intended for arrangement of the new electrical device section of the connected respective wire of the vehicle electrical equipment system and the respective new electrical device form in fact a waterproof packing around the section of the wires connected to one another by joining. The protective built-up box has also a cover joined to the body. The claimed repair kit is preferably designated for replacement of the sensor of the content of oxygen in exhausted gases failed on the vehicle.

EFFECT: simplified aftersale servicing of the vehicle.

9 cl, 8 dwg

FIELD: electric engineering, possible use during drilling and operation of slanting and horizontal oil-gas wells.

SUBSTANCE: cable socket for operation in conductive environment consists of rod and socket parts with holding assembly. Holding assembly is positioned in rod part of socket and includes spring-loaded bushing, internal diameter of which is greater than external diameter of socket part body, and holding elements, held together by resilient ring and in casing, which is pressed by spring to internal shelf of rod part body. Rod part additionally contains rotary cutoff plate and lever connected thereto, pinned on an axis.

EFFECT: reliable holding of cable socket, and also reliable connection of rod and socket parts at low force, applied to cable with socket held on its end, while disconnection occurs at distance 200-500 meters from force application point.

2 dwg

Sealed plug // 2292102

FIELD: instrumentation engineering; space-rocket technology, aeronautical engineering, and advanced radio electronic devices.]

SUBSTANCE: proposed sealed plug has metal shroud that incorporates cylindrical part being jointed, rectangular flange, and cylindrical wiring tail, as well as glass insulator installed within shroud and reinforced by dowel pins. Shroud accommodates intermediate steel ring assembled by tight fit, its inner diameter being equal to outer one of glass insulator. Plug shroud is built of two parts of which first one has cylindrical part being jointed and front end of rectangular flange abutting against the latter and made of light-mass metal alloys whose coefficient of linear expansion is close to that of steel, as well as second end of rectangular flange abutting against cylindrical wiring tail, and cylindrical wiring tail, both made of steel.

EFFECT: reduced size and mass at high degree of plug tightness.

1 cl, 1 dwg

FIELD: electrical engineering.

SUBSTANCE: proposed printed-circuit conductor 1 is provided with a number of jacks 2 for same number of terminals 3 to which magnet wires 8 are drawn by means of tool 11 to form junction by passing magnet wires 8 through terminals 3. Each jack or cavity 2 is separated from adjacent one by means of transverse partitions 4 and 4' which makes it possible to introduce sealing compound into respective cavity 2 of jack up to level 12 below input step 10 of magnet wires and above edge of terminals 3 so as to ensure that mentioned terminals and junction points between them and magnet wires 8 are immersed in sealing compound to prevent oxidation at junction points.

EFFECT: enhanced effective life of sealing compound.

8 cl, 4 dwg

FIELD: electrical connector and method for connecting coaxial cable lead to terminal.

SUBSTANCE: proposed connector has nut incorporating receiving port for connection to terminal. Nut also has circular clip. Connector also has base member one of whose ends is provided with projection to be inserted through clip hole. Other end of base member incorporates part of inner surface. Connector also has support with flange and body. Support is free to move for compressing external cable conductor and shell with support body and part of inner surface to obtain distal compression. Tightening nut with terminal compresses projection between support flange and circular clip to obtain proximal tightness.

EFFECT: enhanced tightness, reduced manufacturing and maintenance charges.

10 cl, 11 dwg

Up!