CN106299787B

CN106299787B - A kind of downhole cable docking facilities

Info

Publication number: CN106299787B
Application number: CN201610680749.4A
Authority: CN
Inventors: 陈德兵
Original assignee: Wang Yanzeng
Current assignee: Wang Yanzeng
Priority date: 2016-08-17
Filing date: 2016-08-17
Publication date: 2019-01-29
Anticipated expiration: 2036-08-17
Also published as: CN106299787A

Abstract

The invention discloses downhole cable docking facilities, it include: lid, rectifying and voltage-stabilizing device, metal cap, coil, upper metal column, upper connection structure, lower connection structure, metab, lower connection structure and metab can be connected by lower cable with the motor of downhole submersible pumps by the present invention, and it is directly placed into underground, upper cable is connected with upper connection structure again, then upper connection structure and its each component that is connected are put into underground along oil pipe center together, by being powered for coil, so that metal cap and upper metal column generate electromagnetic attraction, and due to the self weight of upper cable and upper connection structure and its each component that is connected, so that metab is close to each other with metal cap bottom and docks, lower connection structure docks conduction with upper connection structure；Therefore, upper cable can be put into underground along oil pipe center with upper connection structure and its each component that is connected, to avoid cable by borehole wall extrusion damage, while also avoid the problems such as causing trouble of lost tool in hole with wall friction.

Description

A kind of downhole cable docking facilities

Technical field

The present invention relates to petroleum electric machinery field, in particular to a kind of downhole cable docking facilities.

Background technique

In oil field development, submersible electric pump is always an important component of artificial lift, in recent years latent oil The application of screw pump, linear motor is so that submersible electric pump DP technology technology is grown rapidly, and as inclined shaft quantity is continuously increased, Ground pumping production technique will gradually be substituted.

In the prior art, often will crude oil to underground pass through submersible electric pump and carry out up oil transportation, the installation of submersible electric pump Position powers to downhole electrical motor in 1000 meters of underground depth, submersible electric pump cable, and being in the method taken at present will on ground Cable couples with submersible electric pump, then cable is tied up on oil-pipe external wall by root, and submersible electric pump and cable are with oil pipe lower going-into-well together It is interior.

In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems:

Since oil pipe is had damage or hole deviation, cable is tied up goes into the well on oil-pipe external wall, easily causes cable bad and trouble of lost tool in hole, To cause down-hole accident, increase workover cost.

Summary of the invention

In order to solve the problems, such as that the prior art easily causes cable bad and trouble of lost tool in hole, the embodiment of the invention provides one kind Downhole cable docking facilities.The technical solution is as follows:

A kind of downhole cable docking facilities, for keeping upper cable and lower cable connection conductive, the downhole cable is to tipping Set includes: the lid for being internally provided with cavity, rectifying and voltage-stabilizing device, the metal cap of bottom opening, coil, upper metal column, upper company Binding structure, lower connection structure, metab, the lid spiral-lock are set in the top of the metal cap, the rectifying and voltage-stabilizing device It sets in the lid portion inside cavity, the coil, the upper connection structure are arranged in the metal cap, and the upper gold Belong to column be plugged in the coil, the upper cable first end connects to power supply, the upper cable second end respectively with it is described on Connection structure, rectifying and voltage-stabilizing device connection, and the rectifying and voltage-stabilizing device is connect with the coil, the lower connection structure It is arranged on the metab, the lower connection structure and the lower cable connection pass through the metab and the gold Belong to the docking of cover bottom, the lower connection structure is made to dock conduction with the upper connection structure.

Preferably, the upper connection structure includes socket, normally closed actuation button, locking device, the socket setting exists On the metal cap inner wall below the coil, and the socket be located at the metal cap inner wall and the upper metal column it Between, it connect, is provided in the socket axially parallel with the metal cap at the top of the upper cable second end and the socket Jack, the jack for accommodating the lower connection structure, be respectively arranged on the side wall of the jack it is described it is normally closed touch by Button, the locking device, the normally closed actuation button are all connected with the rectifying and voltage-stabilizing device, the coil.

Preferably, the locking device includes fixed cylinder, spring, plush copper, perforation is provided on the side wall of the jack, The fixed cylinder is arranged in the perforation, and the plush copper and the spring are arranged inside the fixed cylinder, and described convex The closely described jack setting of head rest, the spring push the plush copper to protrude into the jack, and the plush copper is used for and the lower company The contact limit of binding structure.

Preferably, the lower connection structure includes sequentially connected insulated probe and the conductive body of rod from top to bottom, it is described One end on the conductive body of rod close to the insulated probe is provided with locking groove, and the conduction body of rod is arranged in the metab On, when the insulated probe and the conductive body of rod are inserted into the jack, the conduction body of rod is contacted with the side wall of the jack, The locking device is used to engage limit with the locking groove.

Preferably, the metab includes lower metal column and metal pedestal, the lower metal column is fixed on the metal On seat, on the lower metal column be provided with through-hole in the metal pedestal, the conduction body of rod is arranged in the lower metal column On through-hole in, described lower cable one end connect with the conductive body of rod lower end, and through-hole of the other end in metal pedestal extends to It is external.

Further, the downhole cable docking facilities further include upper insulation and sealing structure, the upper insulation and sealing structure The first insulated enclosure set and the first insulating seal, the first insulated enclosure set including connection are sleeved on outside the socket Wall, first insulating seal are located at below the socket, are provided on first insulating seal and connect with the jack Logical taper through slot, the lower connection structure pass through the taper through slot and enter the jack, taper through slot both ends internal diameter Difference is 1mm.

Further, the downhole cable docking facilities further include lower insulation and sealing structure, the lower insulation and sealing structure It from top to bottom include that the second insulated enclosure set of connection and third insulated enclosure set, second insulated enclosure cover and the third Insulated enclosure set is sleeved on the external wall of the conducting rod, and second insulated enclosure set is located on the lower metal column In through-hole, the outer diameter of the third insulated enclosure set is greater than the internal diameter of through-hole on the lower metal column, and third insulation is close Big envelope is stuck in the outside of through-hole on the lower metal column, and when the conduction body of rod is inserted into the jack, second insulation is close Big envelope and the first insulating seal palette.

Further, the downhole cable docking facilities further include centralising device, and the centralising device is arranged in the gold Belong between cover and the metab.

Preferably, the centralising device includes upper centralising device and lower centralising device, the upper centralising device setting exists The metal cap bottom, the lower centralising device are arranged at the top of the metab, the upper centralising device with it is described lower right Middle device contraposition cooperation.

Preferably, the upper centralising device is multiple upper teeth that the metal cap bottom peripheral edge is arranged in, Mei Geshang The tooth top of teeth is provided with protrusion, and the lower centralising device is multiple lower teeth that the metab top perimeter is arranged in, The bottom of the tooth of each lower teeth is provided with the groove with the male cooperation, and the upper teeth and the lower teeth contraposition cooperate, institute It states and is provided with drainage hole on centralising device.

Technical solution provided in an embodiment of the present invention has the benefit that

Lower connection structure and metab can be connected by lower cable with the motor of downhole submersible pumps by the present invention, and directly Be put into underground, then upper cable be connected with upper connection structure, then by upper connection structure and its be connected each component together along Oil pipe center is put into underground, by being powered for coil, so that metal cap and upper metal column generate electromagnetic attraction, with lower connection structure And metab attraction is close, and due to the self weight of upper cable and upper connection structure and its each component that is connected, so that metal bottom Seat is close to each other with metal cap bottom and docks, and achievees the purpose that lower connection structure docks conduction with upper connection structure；The present invention Docking conduction can be completed in underground by electromagnetic attraction and self gravity in upper and lower two parts, and therefore, upper cable and upper connection are tied Structure and its each component that is connected can be put into underground along oil pipe center, so that cable be avoided to keep away by borehole wall extrusion damage, while also Exempt from the problems such as causing trouble of lost tool in hole with wall friction, prevent the generation of down-hole accident, save operating cost, increases economic benefit； In addition, the configuration of the present invention is simple, use is safe, easy to operate, actually uses with the obvious advantage.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.

Fig. 1 is a kind of structural schematic diagram of downhole cable docking facilities provided in an embodiment of the present invention；

Fig. 2 is A-A cross-sectional view in Fig. 1；

Fig. 3 is the rectifying and voltage-stabilizing device connection schematic diagram that further embodiment of this invention provides；

Fig. 4 is the structural schematic diagram for the metal cap that further embodiment of this invention provides；

Fig. 5 is the structural schematic diagram for the upper metal column that further embodiment of this invention provides；

Fig. 6 is the structural schematic diagram for the upper connection structure that further embodiment of this invention provides；

Fig. 7 is the structural schematic diagram for the normally closed actuation button that further embodiment of this invention provides；

Fig. 8 is the structural schematic diagram for the locking device that further embodiment of this invention provides；

Fig. 9 is the structural schematic diagram for the upper insulation and sealing structure that further embodiment of this invention provides；

Figure 10 is the cross-sectional view for the metal pedestal that further embodiment of this invention provides；

Figure 11 is the top view for the metal pedestal that further embodiment of this invention provides；

Figure 12 is the structural schematic diagram for the lower connection structure that further embodiment of this invention provides；

Figure 13 is the structural schematic diagram for the lower insulation and sealing structure that further embodiment of this invention provides；Wherein: 1 lid, 11 Upper cable, 12 lower cables,

13 rectifying and voltage-stabilizing devices, 131 diodes, 132 electrolytic capacitors, 133 voltage-stabiliser tubes,

2 metal caps,

21 coils,

Metal column on 22,

23 wire guides, 24 tapped through holes, 25 limiting grooves,

Connection structure on 3,

31 sockets, 32 jacks,

33 normally closed actuation buttons,

331 stroke levers, 332 shells, 333 moving contacts switch, 334 buffer springs,

34 locking devices, 341 fixed cylinders, 342 springs, 343 plush coppers,

Insulation and sealing structure on 4,

41 first insulated enclosure sets, 42 first insulating seals, 43 taper through slots,

5 lower connection structures,

51 insulated probes, the 52 conductive bodies of rod, 53 locking grooves,

6 lower insulation and sealing structures,

61 second insulated enclosure sets, 62 third insulated enclosure sets,

7 metabs, 71 lower metal columns, 72 metal pedestals,

8 centralising devices,

81 protrusions, 82 drainage holes, 83 grooves, 84 teeth.

Specific embodiment

To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention Formula is described in further detail.

As shown in Figure 1, the embodiment of the invention provides a kind of downhole cable docking facilities, for making upper cable 11 under Cable 12 connects conduction, and the downhole cable docking facilities include: the lid 1 for being internally provided with cavity, rectifying and voltage-stabilizing device 13, the metal cap 2 of bottom opening, coil 21, upper metal column 22, upper connection structure 3, lower connection structure 5, metab 7, it is described At the top of the metal cap 2, the rectifying and voltage-stabilizing device 13 is arranged in 1 internal cavities of lid 1 spiral-lock of lid, described Coil 21, the upper connection structure 3 are arranged in the metal cap 2, and the upper metal column 22 is plugged in the coil 21 Interior, upper 11 first end of cable connects to power supply, upper 11 second end of cable respectively with the upper connection structure 3, described Rectifying and voltage-stabilizing device 13 connects, and the rectifying and voltage-stabilizing device 13 is connect with the coil 21, and the lower setting of connection structure 5 exists On the metab 7, the lower connection structure 5 is connect with the lower cable 12, passes through the metab 7 and the metal The docking of 2 bottoms is covered, the lower connection structure 5 is made to dock conduction with the upper connection structure 3.

Wherein, in the embodiment of the present invention, the conducting wire perforation that current supply cable passes through, the top of lid 1 are provided at the top of lid 1 It is set as semicircle spherical shape, to bear bigger water pressure, the material of lid 1 selects electrical pure iron DT4C；

As shown in figure 4, metal cap 2 is circle ring iron core, material selects DT4C, and top peripheral is provided with connection screw thread, even Connect screw thread to connect with the connection screw thread of lid 1, be provided with wire guide 23 and tapped through hole 24 at the top of circle ring iron core, wire guide 23 with Just cable conductor passes through, and six wire guides 23 are generally arranged, and tapped through hole 24 is used for solid across bolt and upper metal column 22 Fixed, circle ring iron core internal cavities place coil 21 and upper connection structure 3, moreover, 2 inner wall of metal cap is additionally provided with limiting groove 25, limiting groove 25 is also provided on corresponding upper 22 outer wall of metal column, and a gasket is fixed in two limiting grooves 25 and is fixed Part, gasket fixing piece are connected and fixed with upper connection structure 3, when guaranteeing that lower connection structure 5 is connect with upper connection structure 3, upper connection Structure 3 is not extracted；Cylinder iron core can be used in upper metal column 22, and top is also equipped with wire guide 23 and tapped through hole 24, leads The wire guide 23 of string holes 23 and circle ring iron core corresponds, and the tapped through hole 24 of tapped through hole 24 and circle ring iron core is connected by bolt Fixation is connect, cylinder iron core Fillers selection neodymium iron boron Nd2Fe14B is viscous by neodymium iron boron powder and filler, plastic cement or low-melting-point metal etc. Knot agent uniformly mixes, then the compound Nd-Fe-B permanent magnet made of the methods of compression, extruding or injection moulding；

As shown in Figure 1, coil 21 is provided with upper and lower two coils 21, the rated direct voltage of the coil 21 is 340V, preferably, 21 material of the coil selects enameled wire SWG, the radius R1 of coil 21 to be set as 9mm, R2 is set as The thickness H of 20mm and coil 21 is 11mm；The height of the coil 21 is 80mm, line footpath 0.78mm, conducting wire copper core Diameter is 0.72mm, section 0.4072mm², D.C. resistance is 43 Ω/Km, and skeleton width per cm twines 12.8 circles, can also root According to actual conditions flexible setting；

As shown in figure 3, rectifying and voltage-stabilizing device 13 is provided with rectifier diode, electrolytic capacitor, voltage-stabiliser tube, preferably, institute Rectifier diode selection IN4007 type germanium diode is stated, specified forward direction operating current is 1A, reverse withstand voltage 1000V；The electrolysis Capacitance selection ITA/RTCD139, parameter are 340v4700uf electrolytic capacitor；The voltage-stabiliser tube selects two pole of U1ZB330-Z pressure stabilizing Pipe exports DC voltage 340V, power 1W, and circuit board uses PCB substrate copper-clad plate, and each element connection is as shown in figure 3, it is inputted Alternating voltage 380V exports DC voltage 340V；

Lower connection structure 5 and metab 7 can be connected by lower cable with the motor of downhole submersible pumps by the present invention, and straight It connects and is put into underground, be generally placed at 1000 meters of underground, diameter 60mm oil pipe can be put into well, then by upper cable 11 and upper connection Structure 3 is connected, and upper connection structure 3 and its each component that is connected then are put into underground along oil pipe center together, when being put into depth After degree reaches oil-immersed pump depth, after test insulation resistance is greater than 10M Ω, power turn-on switch is powered to coil 21, so that golden Belong to cover 2 and upper metal column 22 generate electromagnetic attraction, attract with lower connection structure 5 and metab 7 it is close, and due to upper cable 11 With the self weight of upper connection structure 3 and its each component that is connected so that metab 7 is close to each other with 2 bottom of metal cap and docks, Achieve the purpose that lower connection structure 5 docks conduction with upper connection structure 3；Connection structure 5 and upper connection structure 3 under general measure Between insulation resistance be greater than 10M Ω can be 21 power transmission of coil, by electromagnet generate 1000N electromagnetic attraction；In the present invention Docking conduction can be completed in underground by electromagnetic attraction and self gravity in lower two parts, and therefore, upper cable 11 is tied with upper connection Structure 3 and its each component that is connected can be put into underground along oil pipe center, so that cable be avoided to keep away by borehole wall extrusion damage, while also Exempt to cause the trouble of lost tool in hole problems such as cable whereabouts or other borehole wall clasts with wall friction, prevents the generation of down-hole accident, save Operating cost increases economic benefit；In addition, the configuration of the present invention is simple, use is safe, easy to operate, actually uses with the obvious advantage.

As shown in fig. 6, also can be found in Fig. 2, preferably, the upper connection structure 3 includes socket 31, normally closed actuation button 33, locking device 34, the socket 31 is arranged on 2 inner wall of the metal cap below the coil 21, and the socket 31 Between 2 inner wall of metal cap and the upper metal column 22, connect at the top of upper 11 second end of cable and the socket 31 It connects, is provided in the socket 31 and is used to accommodate the lower company with the axial parallel jack 32 of the metal cap 2, the jack 32 Binding structure 5, is respectively arranged with the normally closed actuation button 33, the locking device 34 on the side wall of the jack 32, it is described often Actuation button 33 is closed to be all connected with the rectifying and voltage-stabilizing device 13, the coil 21.

As shown in figure 8, preferably, the locking device 34 include fixed cylinder 341, spring 342, plush copper 343, it is described insert Perforation is provided on the side wall in hole 32, the fixed cylinder 341 is arranged in the perforation, the plush copper 343 and the spring 342 It is arranged inside the fixed cylinder 341, and the plush copper 343 is arranged close to the jack 32, the spring 342 pushes institute It states plush copper 343 to protrude into the jack 32, the plush copper 343 is used to contact limit with the lower connection structure 5.

Wherein, as shown in fig. 7, being provided with the normally closed touch switch stroke vertical with jack 32 on 32 side wall of jack Lever cavity, locking device chamber are respectively used to accommodate normally closed actuation button 33 and locking device 34；Normally closed actuation button 33 is existing Technology, outer dimension need actual conditions flexible setting according to the present invention, are provided with stroke lever 331, shell 332, dynamic touching Head switch 333, buffer spring 334, stroke lever 331 are sequentially contacted with moving contact switch 333, buffer spring 334, and are all provided with It sets inside shell 332, specifically when connection, the input terminal of rectifying and voltage-stabilizing device 13 is connect with upper cable 11, rectifying and voltage-stabilizing device 13 two output ends, wherein one end is welded and fixed with one end of moving contact switch 333 and connect, moving contact switch 333 it is another End is welded and fixed with one end of coil 21 to be connect, and the other end of coil 21 and the another output of rectifying and voltage-stabilizing device 13 are welded It is fixedly connected, circuit, the disconnection of moving contact switch 333 is collectively formed in rectifying and voltage-stabilizing device 13, moving contact switch 333 and coil 21 It can control the disconnection of coil 21；It is provided with screw thread outside shell 332, is connect admittedly by screw thread with the through-hole of 32 side wall of jack Fixed, 331 one end of stroke lever is arranged close to jack 32, and the other end abuts the moving contact switch 333 of button, it is generally the case that slow It rushing spring 334 and is in extended state, jack 32 is protruded into 331 end of stroke lever, when connection structure 5 protrudes into jack 32 instantly, under Connection structure 5 pushes stroke lever 331 mobile, i.e., promotion moving contact switch 333 is mobile to 334 side of buffer spring, at this point, making It obtains moving contact switch 333 to disconnect, so that two coils 21 power off, and stops generating electromagnetic field, both completed docking in this way, Solve the problems, such as that coil 21 is electrified for a long time power consumption again；Normally closed actuation button 33 touches stroke and is set as 1mm, stroke lever 331 Diameter be traditionally arranged to be 2mm；The sagitta of the plush copper 343 of locking device 34 is equal with the stroke of moving contact switch 333, jack 32 Fillers selection red copper, inner wall are silver-plated.

As shown in figure 12, preferably, the lower connection structure 5 from top to bottom include sequentially connected insulated probe 51 with The conductive body of rod 52, it is described conduction the body of rod 52 on close to the insulated probe 51 one end be provided with locking groove 53, the conduction The body of rod 52 is arranged on the metab 7, when the insulated probe 51 is inserted into the jack 32 with the conductive body of rod 52, institute State the conductive body of rod 52 to contact with the side wall of the jack 32, be used for conductive communication, the plush copper 343 of the locking device 34 be used for The engaging of locking groove 53 limit.

Wherein, the conductive body of rod 52 is generally using conductive copper rod, and the taper of the tip of insulated probe 51 is 62 °, length 4.5mm, outer diameter are consistent with the conductive outer diameter of copper rod.12 partial filler of the lower cable selection red copper being connect with the conductive body of rod 52, outside Portion's wall is silver-plated, 51 Fillers selection polyether-ether-ketone PEEK of insulated probe, is molded moulding by casting.

As shown in Figure 1, also can be found in Figure 10 and Figure 11, preferably, the metab 7 includes lower metal column 71 and gold Belong to seat 72, the lower metal column 71 is fixed in the metal pedestal 72, on the lower metal column 71 in the metal pedestal 72 It is provided with through-hole, the conduction body of rod 52 is arranged in the through-hole on the lower metal column 71, described lower 12 one end of cable and institute Conductive 52 lower end of body of rod connection is stated, the through-hole that the other end passes through in metal pedestal 72 extends to outside.

Wherein, annulus armature can be used in metal pedestal 72, and lower metal column 71 uses cylinder armature, in metal pedestal 72 in setting Recessed cavity, lower metal column 71 is placed in the cavities, by screw through fixation between metal pedestal 72 and lower metal column 71；Lower electricity 12 one end of cable is connect with 52 lower end of the conductive body of rod, and the through-hole that the other end passes through in metal pedestal 72 extends to outside and is connected to motor.

As shown in figure 9, further, 12 docking facilities of downhole cable further include upper insulation and sealing structure 4, described Upper insulation and sealing structure 4 includes the first insulated enclosure set 41 and the first insulating seal 42 of connection, first insulated enclosure Set 41 is sleeved on 31 outer wall of socket, and first insulating seal 42 is located at 31 lower section of socket, first insulation The taper through slot 43 being connected to the jack 32 is provided on seal 42, the lower connection structure 5 passes through the taper through slot 43 enter the jack 32, and the 43 both ends difference in internal diameters of taper through slot is 1mm.

Wherein, the Fillers selection polyether-ether-ketone PEEK of upper insulation and sealing structure 4, is formed by injection moulding process；Taper through slot 43 parts are provided with the gradient of 1mm difference, when so as to taper through slot 43 and crowded 61 pairs of the second insulated enclosure set, exclude insulation interlayer Water, reach reliable insulating effect.

As shown in figure 13, further, 12 docking facilities of downhole cable further include lower insulation and sealing structure 6, described Lower insulation and sealing structure 6 includes that the second insulated enclosure set 61 of connection covers 62, described second with third insulated enclosure from top to bottom Insulated enclosure set 61 is sleeved on 52 outer wall of the conductive body of rod with third insulated enclosure set 62, and second insulation Sealing shroud 61 is located in the through-hole on the lower metal column 71, and the outer diameter of the third insulated enclosure set 62 is greater than the lower metal The internal diameter of through-hole on column 71, and third insulated enclosure set 62 is stuck in the outside of through-hole on the lower metal column 71, it is described to lead When electric pole body 52 is inserted into the jack 32, the second insulated enclosure set 61 and 42 sealing paste of the first insulating seal It closes.

Wherein, lower 6 Fillers selection polyether-ether-ketone PEEK of insulation and sealing structure, by being molded moulding by casting；Third insulation is close Big envelope 62 is stuck in the bottom of through-hole on lower metal column 71, for limiting, prevents the conductive body of rod 52 to be detached from lower metal column 71 and leads to Hole.

As shown in Figure 1, also can be found in Fig. 4, Figure 10 and Figure 11, further, 12 docking facilities of downhole cable are also wrapped Centralising device 8 is included, the centralising device 8 is arranged between the metal cap 2 and the metab 7.

Preferably, the centralising device 8 includes upper centralising device 8 and lower centralising device 8, the upper centralising device 8 is set Set in 2 bottom of metal cap, the lower setting of centralising device 8 at 7 top of metab, the upper centralising device 8 with The contraposition of lower centralising device 8 cooperation.

Preferably, the upper centralising device 8 is multiple upper teeth 84 that 2 bottom peripheral edge of metal cap is arranged in, often The tooth top of a upper teeth 84 is provided with protrusion 81, and the lower centralising device 8 is 7 top perimeter of metab is arranged in more A lower teeth 84, the bottom of the tooth of each lower teeth 84 are provided with the groove 83 with raised 81 cooperation, the upper teeth 84 and institute The lower contraposition of teeth 84 cooperation is stated, is provided with drainage hole 82 on the upper centralising device 8.

Wherein, there are many implementations of centralising device 8, it is convenient for so that upper connection structure 3 and lower connection structure 5 are in underground It is smoothly aligned centering and docks conduction, and increase the contact area of iron core up and down.In the embodiment of the present invention, upper centralising device 8 For multiple upper teeth 84, lower centralising device 8 is multiple lower teeth 84, and upper teeth 84 cooperate with the lower contraposition of teeth 84, i.e., often A tip portion can regard convex triangle as, and bottom of the tooth part can regard recessed triangle as, and the apex angle of each triangle is set as 104 °, Base angle is 38 °, a height of 14mm；Drainage hole 82 there are three being generally arranged on convex triangle each of on upper centralising device 8, with Just when electromagnetic attraction drags top and the bottom of the present invention, the water energy inside device excludes faster.

Metal cap, upper metal column in the present invention and lower metal column and metal pedestal in metab, being all made of can lead to Cross the metal that electromagnetic induction generates electromagnetic attraction, such as iron, nickel, cobalt metal material；It can be according to reality in each gap of the present invention Insulating packing is added in border situation, and the insulating packing of upper and lower cable insulation, coil insulation and each gap selects PEEK, keeps its resistance to Temperature reaches 250 degrees Celsius or more, and dielectric strength reaches 1KV/mm.

In the embodiment of the present invention, the quantity of upper connection structure 3 and lower connection structure 5 is unlimited, may also set up it is multiple, uniformly point Cloth enhances the reliability of connection preferably, three can be respectively set.

Upper cable 11 and lower cable 12 are three-phase power line, and upper cable 11 is penetrated from the wire guide 23 at 1 top of lid, Pass through by the main power source wire guide 23 of metal cap 2 and the main power source wire guide 23 of upper metal column 22, then with the bottom of jack 32 Scolding tin is fixedly connected, and is drawn control power lead respectively from the bottom weld of the jack 32 of A phase and B phase, is passed through metal cap 2 The main power source wire guide 23 of main power source wire guide 23 and upper metal column 22, then pass through end with the power import of rectifying and voltage-stabilizing device 13 Son is fixedly connected；Two outlet terminals of rectifying and voltage-stabilizing device 13 draw two conducting wires respectively, are led by the main power source of metal cap 2 The main power source wire guide 23 of string holes 23 and upper metal column 22, then pass through scolding tin with 333, two coils 21 of moving contact switch respectively Etc. modes be fixedly connected.The connecting screw hole of metal pedestal 72 is fixedly connected with the connecting screw hole of lower metal column 71 by screw, lower exhausted Edge sealing structure 6 is fixed on the outer wall of the conductive body of rod 52 by casting, and penetrates on lower metal column 71 in through-hole, three-phase power line It by the main power source wire guide 23 of metal pedestal 72, is fixedly connected with the bottom of the conductive body of rod 52 by scolding tin, in institute of the invention There is all casting insulated filler in gap.

12 docking facilities of a kind of downhole cable provided by the invention, by above-mentioned limiting structure, preferably, the lid Infilling selection insulative water-proof glue is docked between 1 inner cavity gap and each component and fills up sealing, and when work, the top of jack 32 is injected Insulating oil is injected in conductive silicone grease, lower part, and the present invention is by upper cable 11 and oneself of upper connection structure 3 and its each component that is connected Weight, and connection structure 5 is pressed into jack 32 by under with the help of centralising device 8, the current-carrying part of jack 32 does not touch at this time The conductive body of rod 52 of lower connection structure 5, insulation resistance being isolated in insulating oil between upper connection structure 3 and lower connection structure 5 Under to reach 10M Ω.After power supply is powered, coil 21 generates electromagnetic field, under the electromagnetic force of 1000N, in 20-60mS Second insulated enclosure set 61 is drawn into the first insulating seal 42 of jack 32, connection structure 3 and lower connection structure are reached 5 smoothly complete the purpose of docking.Cable butt joint device provided in this embodiment is not occurred over 2 years by the utilization of 5 mouthfuls of wells Failure, the device are disposably put into, and can be reused, and the service life at 10 years or more, facilitates construction, saved production cost, Increase economic benefit.

The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims

1. a kind of downhole cable docking facilities, for keeping upper cable and lower cable connection conductive, which is characterized in that the underground electricity Cable docking facilities include: the lid for being internally provided with cavity, rectifying and voltage-stabilizing device, the metal cap of bottom opening, coil, upper metal Column, upper connection structure, lower connection structure, metab, the lid spiral-lock is in the top of the metal cap, the rectifying and voltage-stabilizing Device is arranged in the lid portion inside cavity, and the coil, the upper connection structure are arranged in the metal cap, and institute Metal column is stated to be plugged in the coil, the upper cable first end connects to power supply, the upper cable second end respectively with The upper connection structure, rectifying and voltage-stabilizing device connection, and the rectifying and voltage-stabilizing device is connect with the coil, the lower company Structure setting is connect on the metab, the lower connection structure and the lower cable connection, by the metab with The metal cap bottom docking, makes the lower connection structure dock conduction with the upper connection structure；

The upper connection structure includes socket, normally closed actuation button, locking device, and the socket is arranged in below the coil On the metal cap inner wall, and the socket is between the metal cap inner wall and the upper metal column, the upper cable Connect, is provided in the socket and the axial parallel jack of the metal cap, the jack use at the top of two ends and the socket In accommodating the lower connection structure, it is respectively arranged with the normally closed actuation button, the locking device on the side wall of the jack, The normally closed actuation button is all connected with the rectifying and voltage-stabilizing device, the coil；

The locking device includes fixed cylinder, spring, plush copper, and perforation is provided on the side wall of the jack, and the fixed cylinder is set It sets in the perforation, the plush copper and the spring are arranged inside the fixed cylinder, and the plush copper is inserted close to described Hole setting, the spring push the plush copper to protrude into the jack, and the plush copper is used to contact limit with the lower connection structure Position；

The lower connection structure includes sequentially connected insulated probe and the conductive body of rod from top to bottom, close on the conduction body of rod One end of the insulated probe is provided with locking groove, and the conduction body of rod is arranged on the metab, and the insulation is visited When needle and the conductive body of rod are inserted into the jack, the conduction body of rod is contacted with the side wall of the jack, the locking device For engaging limit with the locking groove；

The metab includes lower metal column and metal pedestal, and the lower metal column is fixed in the metal pedestal, the lower gold Belong on column be provided with through-hole in the metal pedestal, the conduction body of rod is arranged in the through-hole on the lower metal column, institute It states lower cable one end to connect with the conductive body of rod lower end, the through-hole that the other end passes through in metal pedestal extends to outside；

The downhole cable docking facilities further include upper insulation and sealing structure, and the upper insulation and sealing structure includes the first of connection Insulated enclosure set and the first insulating seal, the first insulated enclosure set are sleeved on the socket outer wall, first insulation Seal is located at below the socket, is provided with the taper through slot being connected to the jack, institute on first insulating seal It states lower connection structure and enters the jack across the taper through slot, taper through slot both ends difference in internal diameters is 1mm；

The downhole cable docking facilities further include lower insulation and sealing structure, and the lower insulation and sealing structure includes connecting from top to bottom The second insulated enclosure set and the third insulated enclosure set connect, the second insulated enclosure set are covered with third insulated enclosure set On the external wall of the conducting rod, and second insulated enclosure set is located in the through-hole on the lower metal column, and described the Three insulated enclosures set outer diameter be greater than the lower metal column on through-hole internal diameter, and the third insulated enclosure set be stuck in it is described under The outside of through-hole on metal column, when the conduction body of rod is inserted into the jack, the second insulated enclosure set and described first Insulating seal palette.

2. downhole cable docking facilities according to claim 1, which is characterized in that the downhole cable docking facilities also wrap Centralising device is included, the centralising device is arranged between the metal cap and the metab.

3. downhole cable docking facilities according to claim 2, which is characterized in that the centralising device includes upper centering dress It sets and is arranged with lower centralising device, the upper centralising device in the metal cap bottom, the lower centralising device is arranged in the gold Belong to base top, the upper centralising device and the lower centralising device contraposition cooperate.

4. downhole cable docking facilities according to claim 3, which is characterized in that the upper centralising device is setting in institute Multiple upper teeth of metal cap bottom peripheral edge are stated, the tooth top of each upper teeth is provided with protrusion, and the lower centralising device is setting In multiple lower teeth of the metab top perimeter, the bottom of the tooth of each lower teeth is provided with recessed with the male cooperation Slot, the upper teeth and the lower teeth contraposition cooperate, and are provided with drainage hole on the upper centralising device.