CN213750349U - Deep well electric spark focus - Google Patents

Abstract

The utility model discloses a deep well electric spark source, including the central control case, the top of central control case is provided with the master control case, one side fixed surface of central control case installs power input interface, one side of central control case is provided with the winch, the surface of winch is provided with electrically conductive sliding ring, one side of winch is provided with the pulley, one side of electrically conductive sliding ring is provided with the rotor limit, one side on rotor limit is provided with the stator limit. The utility model discloses an energy storage electric capacity is closely adjacent with the excitation probe part, and the energy of loss is low on the cable, and this system excitation energy reaches 20KJ, through increasing energy storage electric capacity, can also extend to bigger excitation energy, and depth of detection can reach more than 5000 meters, and the like product appears in the present internal not yet development, has filled the blank in internal deep well electric spark focus field, and the emission probe is high temperature resistant, stand wear and tear, anticorrosive, and it is high to arrange the energy conversion rate in the sealed rubber bag that fills with salt solution in.

Description

Deep well electric spark focus

Technical Field

The utility model relates to an oil well logging technical field specifically is deep well electric spark focus.

Background

The electric spark source is one type of electric energy source. It uses capacitor to add the stored electric energy to the electrode placed in the water in advance, because the discharge effect produces sparks, the instantaneous high temperature and high thermal arc heats the surrounding medium-water, quickly forms high pressure steam, releases energy to cause vibration. The electric spark seismic source mainly comprises a control box, a capacitance box and electrodes, the auxiliary equipment is few, the volume is small, the transportation and the transportation are convenient, and when the electric spark seismic source is excited in a deep well, if a capacitor ground energy storage mode is adopted, the energy lost on a cable of a plurality of kilometers in the well is very large under the condition of excitation in the underground electrodes, and the excitation effect is poor.

At present, an electric spark source device and a system thereof of a deep well electric spark source related patent CN201921385097.7 disclose a device for underground energy storage and ground control of the electric spark source, and the problem of energy loss of a deep well cable is well solved by charging an underground energy storage capacitor through ground transportation and kilovolt high voltage. The drawback of this scheme is that can bear several kilovolts's high pressure on the well cable, can have certain potential safety hazard, and bearing tensile ability is relatively poor simultaneously, and the switch damages easily when the high-pressure of system discharges, excites the big gun head and arouses stability relatively poor under the special condition such as deep well anhydrous, contain crude oil, mud, and wearing and tearing are great in the use, and high temperature resistant high pressure performance is relatively poor, and when stranded conductor dish rotated, the winding problem of well cable under the high pressure can be met.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a deep well electric spark focus to solve the problem that proposes in the above-mentioned background device.

In order to achieve the above object, the utility model provides a following scheme:

the deep well electric spark source comprises a central control box, wherein a main control box is arranged at the top of the central control box, a power input interface is fixedly arranged on the surface of one side of the central control box, a winch is arranged on one side of the central control box, a conductive sliding ring is arranged on the surface of the winch, a pulley is arranged on one side of the winch, a rotor edge is arranged on one side of the conductive sliding ring, a stator edge is arranged on one side of the rotor edge, a main control box connecting port is arranged on one side of the stator edge, a well descending cable is arranged on one side of the conductive sliding ring, an outer layer steel armor is arranged on the surface of the well descending cable, an inner layer steel armor is arranged on the inner side of the outer layer steel armor, a shielding layer is arranged on the inner side of the inner layer steel armor, a control core is arranged around the inner side of the shielding layer, an insulating layer is arranged on the inner side of the control core, and a high-voltage core is arranged on the inner side of the insulating layer, the one end and the central control case of cable go down the well are connected, the cable goes down the well and pulley roll connection, the one end fixed mounting of cable goes down the well has the probe, the inboard of probe is provided with energy storage capacitor, high-pressure discharge switch is installed through high-pressure connector block to energy storage capacitor's one end, inside one side fixed mounting of high-pressure discharge switch has reset spring, reset spring's one end fixed mounting has the coil, one side fixed mounting of high-pressure discharge switch has arouses the big gun head, the inboard fixed mounting of top probe of energy storage capacitor has the power that steps up.

As a further aspect of the present invention: the sensor comprises a probe and is characterized in that a first seismic wave receiving sensor and a second seismic wave receiving sensor are fixedly mounted in the probe respectively, and a temperature sensor and a pressure sensor are fixedly mounted in the probe close to one end of a downhole cable respectively.

As a further aspect of the present invention: the high-voltage connector comprises a male socket arranged at the joint of the parts in the probe, one side of the male socket is provided with a conductive connector, one side of the male socket is provided with a female socket, and one end of the female socket is provided with a conductive interface.

As a further aspect of the present invention: the probe comprises a plurality of sections of probe tubes, a boosting power supply, an energy storage capacitor, a high-voltage discharge switch and an excitation gun head are all arranged inside the probe tubes, any two adjacent sections in the probe tubes are electrically connected through a high-voltage connector, each section of probe tube is fastened and hermetically connected through two sections of outer tubes in T-shaped thread transmission, and a plurality of layers of O-shaped rings are designed between each section of probe tube to seal.

As a further aspect of the present invention: the inside of arousing the big gun head is provided with the rubber bag, the inside central point department fixed mounting of rubber bag has arousing electrode, and arouses one side of electrode and be provided with the steel inside lining.

As a further aspect of the present invention: the outer side of one end of the excitation electrode is provided with a negative electrode in a surrounding mode, the inner side of the negative electrode is provided with an insulating pad, and the inner side of the insulating pad is provided with a positive electrode.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an energy storage electric capacity and excitation probe part are closely adjacent, the energy of loss is low on the cable, this system excitation energy reaches 20KJ, through increasing energy storage electric capacity, can also expand to bigger excitation energy, the depth of detection can reach more than 5000 meters, at present domestic like product has not been developed yet, the blank in the deep well electric spark seismic source field in China has been filled up, the emission probe is high temperature resistant, stand wear and tear, corrosion resistant, arrange in the sealed rubber bag that fills with salt solution, energy conversion rate is high, arouse effectually, can arouse in no water coupling well, or the well that is full of crude oil, the application scope of the electric spark seismic source that makes is expanded, the stability of arousing in various complicated oil well liquid environments promotes by a wide margin, ground central control box adopts PLC intelligent control technology, control monitoring device and module are installed fixedly in engineering plastic box body, the fully sealed design, no high voltage terminal is exposed, the central control box inputs AC220V power supply to the underground, and controls and monitors the working state of underground devices and modules.

The utility model discloses because the rectification power that steps up is installed in the probe in the pit, ground central control case, cable do not have the high pressure to produce in the pit, and the security performance of operating personnel and system is promoted by a wide margin. Simultaneously in the power that steps up directly charge to condenser in the pit, charge efficiency and speed obtain promoting by a wide margin in the pit, and ground main control case adopts 485 communication cables to be connected with the central control case, and the main control computer adopts the low pressure power supply, with the high low pressure separation of central control case, all adopts the touch-sensitive screen operation, ensures operating personnel's absolute safety. The system is provided with the liquid crystal display screen, can operate and monitor the state of the whole system, automatically protects the system and alarms to display the alarm reason when a fault occurs, improves the automation degree and the safety of the electric spark focus device, makes a breakthrough in the aspects of the size structure and the performance of electric elements such as a high-voltage deep well cable, a high-voltage connector, a high-voltage conductive slip ring, a high-voltage discharge switch and the like, can be extended and used for other high-voltage deep well equipment, and can be used for vibration deblocking and recovery of the productivity of an old oil well due to the pulse pressure wave generated by a deep well high-power electric spark rate focus.

The utility model discloses but deep well high power electric spark rate focus wide application in oil exploration field, including VSP well logging, well-to-well seismic tomography, the one-shot many receipts of single well, the advance forecast in shaft bottom, fields such as earthquake reflection in the pit for find out reservoir thickness, oil and gas saturation, porosity isoparametric, lithology/sedimentary facies analysis, reservoir connectivity analysis etc. deep well high power electric spark rate focus also has extensive application prospect in earth deep resources seismic exploration such as coal field, mine in the pit.

Drawings

FIG. 1 is a schematic diagram of the components of a deep well electric spark source.

FIG. 2 is a schematic diagram of the probe portion of the deep well spark source.

FIG. 3 is a schematic diagram of the high voltage connector assembly of the deep well spark source.

FIG. 4 is a cross-sectional view of a downhole cable for a deep well spark source.

FIG. 5 is a schematic structural diagram of a high-voltage discharge switch part of a deep well electric spark source.

Fig. 6 is a schematic diagram of the internal structure of an excitation gun head of a deep well electric spark source.

Fig. 7 is a structural diagram of the excitation electrode part of the deep well electric spark seismic source.

Fig. 8 is a schematic structural diagram of a conductive slip ring part of a deep well electric spark seismic source.

Shown in the figure: 1. a power input interface; 2. a master control box; 3. a central control box; 4. a winch; 5. a pulley; 6. a downhole cable; 7. an energy storage capacitor; 8. a high voltage discharge switch; 9. exciting the gun head; 10. a high voltage connector; 11. a high pressure core; 12. outer steel armor; 13. a return spring; 14. a coil; 15. an excitation electrode; 16. a steel lining; 17. a rubber bladder; 18. a negative electrode; 19. a positive electrode; 20. an insulating pad; 21. A conductive slip ring; 22. a rotor edge; 23. a stator side; 24. the main control box is connected with a port; 25. a first seismic wave receiving sensor; 26. a second seismic wave receiving sensor; 27. inner steel armor; 28. a temperature sensor; 29. a conductive joint; 30. a male socket is inserted; 31. a female socket is inserted; 32. a conductive interface; 33. a probe; 34. a shielding layer; 35. a control core; 36. an insulating layer; 37. a boost power supply; 38. a pressure sensor.

Detailed Description

The embodiments of the present invention will be described in detail and fully with reference to the accompanying drawings, which are included to illustrate and explain the principles of the invention. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary device personnel in the field without creative work belong to the protection scope of the present invention.

Referring to fig. 1-8, in the embodiment of the present invention, a deep well electric spark source includes a central control box 3, a main control box 2 is disposed on the top of the central control box 3, a power input interface 1 is fixedly mounted on a side surface of the central control box 3, the ground central control box 3 integrates the functions of charging, boosting, discharging, exciting, state monitoring, fault early warning, self-checking, safety protection, etc. of the system, in order to ensure the safety of the operator, the central control box 3 is not directly operated, but the whole set of source system is controlled by the man-machine interface of the main control box 2, the main control box 2 controls high voltage and high-low voltage separation by low voltage in a manner of PLC technology and 485 communication, etc., the ground control system transmits AC 220V-power which is externally input to the underground, the underground boosting power converts AC 220V-input into DC5000V-10000V high voltage DC power output, the high-voltage direct current directly charges a plurality of groups of underground high-voltage capacitors, when a ground control system detects that the underground high-voltage capacitors store energy and reach a preset voltage value, a charging power supply automatically stops charging, a ground main control system controls an underground high-speed discharge switch to be instantly conducted when being excited, the energy stored by the high-voltage capacitors is instantly emitted through an underground excitation gun head, one side of a central control box 3 is provided with a winch 4, the surface of the winch 4 is provided with a conductive sliding ring 21, one side of the winch 4 is provided with a pulley 5, one side of the conductive sliding ring 21 is provided with a rotor edge 22, one side of the rotor edge 22 is provided with a stator edge 23, one side of the stator edge 23 is provided with a main control box connecting port 24, one side of the conductive sliding ring 21 is provided with a well descending cable 6, the surface of the well descending cable 6 is provided with an outer steel armor 12, the inner side of the outer steel armor 12 is provided with an inner steel armor 27, and the inner side of the inner steel armor 27 is provided with a shielding layer 34, the inner side of the shielding layer 34 is provided with a control core 35 in a surrounding mode, the inner side of the control core 35 is provided with an insulating layer 36, the inner side of the insulating layer 36 is provided with a high-voltage core 11 which is thickened for transmitting high voltage and adopts a silver plating process, the voltage resistance of the control core is 10KV, the voltage resistance of 8 groups of cores outside is designed to be 1KV, the insulating layer is mainly used for transmitting control signals, the insulating layer is designed between a middle 1 core and a peripheral 8-core cable, the thickness of the insulating layer is specially thickened to enable the insulating layer to be capable of resisting the voltage of 10KV, 6 cores in 8 cores outside are common cable cores, any 2 cores in 6 cores are ground 0V negative poles, the rest 4 core wires are control signal wires, 2 groups of cores in 8 cores are optical fibers, 2 groups of optical fibers are mainly used for transmitting data or signals at high speed, and the optical fiber transmission can effectively avoid high-voltage interference on a line.

One end of a well descending cable 6 is connected with a central control box 3, the well descending cable 6 is connected with a pulley 5 in a rolling way, one end of the well descending cable 6 is fixedly provided with a probe 33, the inner side of the probe 33 is provided with an energy storage capacitor 7 which is a cylindrical energy storage capacitor 7 with high energy storage density and is arranged in an energy storage section, the length of the built-in capacitor is 2500mm, the diameter of the built-in capacitor is 70mm, the length of the built-in capacitor is designed to be an anode and cathode outgoing line, the highest charging voltage U is 10KV, the capacitor is made of a temperature-resistant polyester film material and is resistant to 150 ℃, one end of the energy storage capacitor 7 is provided with a high-voltage discharge switch 8 in a clamping way through a high-voltage connector 10, a pair of moving and static contacts are arranged in the high-voltage discharge switch 8, the contact material is made of wear-resistant Cu-W-Wc with low shutoff value, therefore, under the condition that the switching performance is met, the overvoltage caused by shutoff in the switching process is reduced, and the service life of the high-voltage switch is prolonged, when a driving circuit supplies control voltage to an underground electromagnetic coil through a cable of thousands of meters, a cylindrical armature drives a propelling rod to enable a movable contact to be connected with a fixed contact in a high-voltage discharge switch 8, a permanent magnet is arranged in the front end of the armature, the armature is attracted by the permanent magnet after the connection, the coil can keep the closed state of the switch only by small current, the phenomenon that the coil is heated and burnt and damaged due to too long-time switch attraction is avoided, when the driving circuit is powered off, a built-in capacitor can reversely connect the positive electrode and the negative electrode of the coil, the magnetic force is reversely added with the thrust action of a spring, the propelling rod retreats to drive the contact to be disconnected, in addition, two ends of the driving circuit and the coil are provided with an anti-electromagnetic interference module, the condition that the driving cable and the high-voltage cable cannot work simultaneously can be overcome, a reset spring 13 is fixedly arranged on one side in the high-voltage discharge switch 8, and a coil 14 is fixedly arranged at one end of the reset spring 13, an excitation gun head 9 is fixedly arranged on one side of a high-voltage discharge switch 8, a boosting power supply 37 is fixedly arranged on the inner side of a probe 33 above an energy storage capacitor 7, a charging loop adopts AC 220V-commercial power or a single-phase generator with rated power of more than 5KW as an input power supply, the underground charging loop and the boosting power supply 37 directly perform constant-current charging energy storage on a high-voltage capacitor after converting AC220V input underground into high-voltage direct current, when the high-voltage capacitor is charged to a set voltage, the charging is stopped, a control system controls the high-voltage discharge switch to be instantly closed, the high-voltage electric energy stored in the capacitor is instantly discharged through a discharging loop, the high-voltage electric energy is punctured through a water gap between the anode and the cathode of the probe, namely the discharge is performed, the stored energy is discharged in a form of strong pulse current at an extremely short instant microsecond level, so that a surrounding medium is vaporized to form a high-temperature high-voltage area, thereby generating pressure shock waves to become seismic sources of seismic waves, in the present invention, the downhole boost rectified power supply converts AC220V into high voltage direct current to charge the downhole capacitor, the voltage U volts on the capacitor then increases, and if the capacitance of the capacitor is C farad, the energy W joules stored in the capacitor can be obtained by the following equation:

the energy storage size of the system is mainly related to the charging voltage of the capacitor and the capacitance capacity, so that in order to increase the energy storage capacity W joule of the capacitor, the energy storage size of the system needs to be increasedThe charging voltage and the electric capacity at the two ends of the capacitor are increased, the charging voltage is not too high for the safety of underground high-voltage operation, therefore, the energy storage capacity of the capacitor can only be increased, moreover, because the diameter of the petroleum drilling is generally very small, the size of the designed underground capacitor is restricted by the aperture, the inside of the probe 33 is respectively and fixedly provided with a first seismic wave receiving sensor 25 and a second seismic wave receiving sensor 26, the inside of the probe 33 close to one end of the underground cable 6 is respectively and fixedly provided with a temperature sensor 28 and a pressure sensor 38, the high-voltage connector 10 comprises a male plug seat 30 arranged at the connection position of the inner side part of the probe 33, one side of the male plug seat 30 is provided with a conductive connector 29, one side of the male plug seat 30 is plugged with a female plug seat 31, one end of the female plug seat 31 is provided with a conductive interface 32, and the conductive connectors 29 and the conductive interface 32 are three groups, the design of a contact pin type is adopted, the connector is divided into a male part and a female part, three connectors are arranged inside the connector, two connectors are two groups of high-voltage positive and negative electrode professional connectors, the voltage-resistant grade is improved by increasing the creepage distance of positive and negative electrodes, the contact area of a moving contact and a static contact and the current-carrying sectional area are increased to improve the charging and discharging current, the probe 33 comprises a plurality of sections of probe tubes, a boosting power supply 37, an energy storage capacitor 7, a high-voltage discharge switch 8 and an excitation gun head 9 are all arranged inside the probe tubes, any two adjacent sections in the probe tubes are electrically connected through a high-voltage connector 10, two sections of outer tubes are fastened and sealed through T-shaped thread transmission between each section of probe tubes, a plurality of layers of O-shaped rings are designed between each section of probe tube to seal up water, the connection stability and the sealing performance between the components can be improved, and a better protection effect on internal devices can be achieved.

The inside of the excitation gun head 9 is provided with a rubber bag 17, an excitation electrode 15 is fixedly installed at the inner center position of the rubber bag 17, the excitation electrode 15 is installed in the center of the rubber bag 17, the upper portion of a discharge electrode is connected with a high-voltage switch through a high-voltage connector 10, a positive electrode and a negative electrode are soaked in saline water of the bag, the conductivity of saline water is enhanced when the positive electrode and the negative electrode are blasted, the energy conversion rate is high, and in order to improve the strength of the rubber bag, a steel lining 16 is arranged on one side of the excitation electrode 15 to prevent the bag from being cracked when the electrode is excited. Meanwhile, in order to facilitate energy release, an elliptical energy release window and a plurality of small air holes are processed on the steel lining 16, a cathode 18 is arranged on the outer side of one end of an excitation electrode 15 in a surrounding mode, an insulating pad 20 is arranged on the inner side of the cathode 18, an anode 19 is arranged on the inner side of the insulating pad 20, a deep well electric spark source system provides two working modes, namely an inter-well mode and a single well mode, the first inter-well mode is usually used for cross-hole/cross-hole seismic CT or underground excitation ground receiving and detecting, a plurality of seismic detector strings are required to be arranged under the other well or seismic detector arrays are required to be arranged on the ground in the inter-well working mode, seismic wave signals generated by underground excitation of the deep well electric spark source are received by a plurality of underground or ground detectors, the detector signals are collected, recorded and stored through a multichannel seismograph, and in the working mode, the external trigger output signal on the deep well electric spark source main control box needs to be connected with the external trigger input of the seismograph to ensure that the seismic waves excited by the electric spark source are synchronously collected by the seismograph, and in the second single well mode, the seismic wave signals generated by the deep well electric spark source under the well are synchronously received and collected by a plurality of sensors in the electric spark source under-well probe 33, wherein the mode is commonly used for single-well one-shot double-receiving hole wall wave velocity test, single-shot single-receiving test, well bottom advanced prediction, single-hole reflection, well tube wave detection and the like, and is commonly used for detecting cracks, faults or layer interfaces in the range of a few meters to a few hundred meters around the well.

The working principle is as follows: when the petroleum logging is required to work, firstly, a main control box 2, a central control box 3 and a cable winch 4 of a deep well electric spark source are installed in a control chamber of a logging truck, the AC220V output of a generator is connected to the power input of the central control box 3, the main control box 2 is connected to the central control box 3 through a control line, the whole system is controlled through control software of the main control box 2, a plurality of sections of a downhole probe 33 of the deep well electric spark source are connected, a boosting power supply section 37 and an energy storage section are firstly placed on an installation support, two sections of axes are aligned, interfaces are aligned according to the sequence of male and female, whether an O-shaped sealing ring at the interface is complete or not is checked, the aging degree of the O-shaped sealing ring is checked, then two sections of outer tubes are fastened and sealed through screwing T-shaped threads, if two sections of energy storage are selected, a second section of energy storage probe is connected to a first section of energy storage probe, connecting by the same connecting method, selecting 1 section, 2 sections or a plurality of sections of energy storage tubes according to the required excitation energy, sequentially connecting a high-voltage discharge switch 8 probe tube and an excitation gun head 9 probe tube until the plurality sections of probe tubes are completely connected in sequence, connecting the outlet end of a high-voltage cable of the winch 4 with the upper end of the downhole probe 33 after the plurality sections of the downhole probe 33 are completely connected, lowering the whole probe 33 to a predetermined depth downhole by starting the winch 4 after the downhole cable 6 is completely connected with the probe 33, starting a generator, connecting an input power line, starting a power switch and an electric leakage protection switch of the central control box 3, starting operating software of the main control box 2, entering a setting interface, setting system parameters such as charging voltage, charging time, discharging time and the like, clicking a 'charging' button on a human-machine interface of the main control box 2, and starting to charge the underground probe 33 and the energy storage capacitor 7, stopping charging when the charging is carried out to the specified voltage, clicking a blasting button, closing an underground high-voltage discharge switch, and exciting the underground capacitor energy storage through a gun head to generate seismic waves. After the seismic source is excited at the depth, the underground probe 33 is lifted or lowered by controlling the ground winch 4, the depth is changed, and the charging and blasting are carried out again until the measurement of the whole well is finished.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalent substitutions can be made on the device embodiments described in the foregoing embodiments or on some of the device features thereof.

Claims (6)

1. Deep well electric spark hypocenter, including central control box (3), its characterized in that: a master control box (2) is arranged at the top of the central control box (3), a power input interface (1) is fixedly installed on the surface of one side of the central control box (3), a winch (4) is arranged on one side of the central control box (3), a conductive sliding ring (21) is arranged on the surface of the winch (4), a pulley (5) is arranged on one side of the winch (4), a rotor edge (22) is arranged on one side of the conductive sliding ring (21), a stator edge (23) is arranged on one side of the rotor edge (22), a master control box connecting port (24) is arranged on one side of the stator edge (23), a well descending cable (6) is arranged on one side of the conductive sliding ring (21), an outer steel armor (12) is arranged on the surface of the well descending cable (6), an inner steel armor (27) is arranged on the inner side of the outer steel armor (12), and a shielding layer (34) is arranged on the inner side of the inner steel armor (27), the inner side of the shielding layer (34) is provided with a control core (35) in a surrounding manner, the inner side of the control core (35) is provided with an insulating layer (36), the inner side of the insulating layer (36) is provided with a high-voltage core (11), one end of the downhole cable (6) is connected with the central control box (3), the downhole cable (6) is in rolling connection with the pulley (5), one end of the downhole cable (6) is fixedly provided with a probe (33), the inner side of the probe (33) is provided with an energy storage capacitor (7), one end of the energy storage capacitor (7) is clamped and installed with a high-voltage discharge switch (8) through a high-voltage connector (10), one side of the interior of the high-voltage discharge switch (8) is fixedly provided with a reset spring (13), one end of the reset spring (13) is fixedly provided with a coil (14), one side of the high-voltage discharge switch (8) is fixedly provided with an excitation gun head (9), and a boosting power supply (37) is fixedly arranged in the upper probe (33) of the energy storage capacitor (7).

2. The deep well electric spark source as claimed in claim 1, wherein: a first seismic wave receiving sensor (25) and a second seismic wave receiving sensor (26) are fixedly mounted in the probe (33) respectively, and a temperature sensor (28) and a pressure sensor (38) are fixedly mounted in the probe (33) close to one end of the downhole cable (6) respectively.

3. The deep well electric spark source as claimed in claim 1, wherein: high pressure connector (10) is including setting up public seat of grafting (30) in probe (33) medial part junction, one side of public seat of grafting (30) is provided with conductive joint (29), female seat of grafting (31) is installed in the male seat of grafting (30) one side plug-in fit, the one end of female seat of grafting (31) is provided with electrically conductive interface (32).

4. The deep well electric spark source as claimed in claim 1, wherein: the probe (33) comprises a plurality of sections of probe tubes, the boosting power supply (37), the energy storage capacitor (7), the high-voltage discharge switch (8) and the excitation gun head (9) are arranged inside the probe tubes, any two adjacent sections in the probe tubes are electrically connected through a high-voltage connector (10), each section of probe tube is fastened and hermetically connected through two sections of outer tubes in T-shaped threaded transmission, and a plurality of layers of O-shaped rings are designed between each section of probe tube to seal up water.

5. The deep well electric spark source as claimed in claim 1, wherein: the rubber bag (17) is arranged inside the excitation gun head (9), an excitation electrode (15) is fixedly installed at the center of the inside of the rubber bag (17), and a steel lining (16) is arranged on one side of the excitation electrode (15).

6. The deep well electric spark source as claimed in claim 5, wherein: the cathode (18) is arranged on the outer side of one end of the excitation electrode (15) in a surrounding mode, the insulating pad (20) is arranged on the inner side of the cathode (18), and the anode (19) is arranged on the inner side of the insulating pad (20).

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