CN105952426B - A kind of de-plugging of well increasing device based on liquid electric pulse shock wave - Google Patents
A kind of de-plugging of well increasing device based on liquid electric pulse shock wave Download PDFInfo
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- CN105952426B CN105952426B CN201610471227.3A CN201610471227A CN105952426B CN 105952426 B CN105952426 B CN 105952426B CN 201610471227 A CN201610471227 A CN 201610471227A CN 105952426 B CN105952426 B CN 105952426B
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
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Abstract
The invention discloses a kind of de-plugging of well increasing device based on liquid electric pulse shock wave, including surface power supply control device, logging cable and underground liquid electric pulse shock wave transmitter.Liquid electric pulse shock wave transmitter is placed at the oil reservoir perforation of underground by logging cable during work, by controlling surface power supply control device to set the number and repetition rate of liquid electric pulse shock wave.Tamper at liquid electric pulse shock wave bombardment oil reservoir perforation, makes it broken into oily cylinder, releases the blocking at perforation.Liquid electric pulse shock wave is propagated by sheath to radial direction simultaneously, the oil reservoir rock acted at perforation, increases its crack, and then strengthen the permeability of crude oil.Perforation, which blocks releasing and formation fractures increase, can dramatically increase the crude output of oil well.The liquid electric pulse shock wave de-plugging of well method for increasing of the present invention is compared with the methods of traditional chemical plugging removal, pressure break de-plugging, belong to the removal and stimulation method of pure physical means, have the characteristics that simple operation, significant effect, environmentally friendly and cost are cheap, and be expected to be extended to the exploitation such as shale gas, mineral products field.
Description
Technical field
The invention belongs to High-Voltage Technology, Pulse Power Techniques and oil-gas mining field, it is based on more particularly, to one kind
The de-plugging of well increasing device of liquid electric pulse shock wave.
Background technology
During oil exploitation, due to containing a large amount of sandstones and gelatin substance in crude oil, easily penetrated after exploiting for a long time
Hole plug, well oil output is caused to decline.Some oil wells are because oil content is low and it is serious to block, using the method for removing blockage of routine
Cost is higher, is rejected as dry well.The old filed annual production of more than 30 years accounts for the 70% of global yield in the world at present, stone
75% comes from old filed in oily incremental reserves.New old filed there is a situation where because of contamination and plugging and the underproduction to some extent, old
It is especially serious in oil field.China's oil well geology is sandy, and oil reservoir is thin and mining depth is deeper, according to statistics the existing up to ten thousand mouthfuls of oil wells in China
Because blocking without oil-producing.
Conventional de-plugging of well Means To Increase Production mainly includes chemical plugging removal, pressure break de-plugging, ultrasonic wave de-plugging etc..Chemical plugging removal
Method for increasing implementing process is complicated, and chemical substance stores, transports more danger the activity duration, it is necessary to longer, and bring
Ecological problem (such as underground water pollution) constrains the extensive use of this method.Pressure break removal and stimulation method operation technique is complicated,
Serious underground water pollution is brought, hydraulic fracturing method for removing blockage is prohibitted the use of by European Union member countries such as France at present.Ultrasonic wave solution
Blocking method structure is relatively simple, and operation technique is simple, but is difficult to produce strong ultrasonic wave, plugging removal effect inside deep-well
It is limited.
The content of the invention
The defects of for existing block releasing technique, it is an object of the invention to provide it is a kind of it is simple in construction, operation technique is simple,
Environmentally friendly, the cheap de-plugging of well increasing device based on liquid electric pulse shock wave of cost.
The invention provides a kind of de-plugging of well increasing device based on liquid electric pulse shock wave, including：Confession positioned at ground
Controller for electric consumption, the liquid electric pulse shock wave transmitter for being arranged at underground and for connecting power supply control apparatus and liquid electric pulse
The logging cable of shock wave transmitter；Liquid electric pulse shock wave transmitter is used to produce high intensity shock wave and focus on to external radiation to propagate,
Act on around oil well, realize oil well production increasing.
Wherein, specific work process is as follows：Plugging removal and stimulation job specification is formulated according to oil well situation and field demand；Utilize
Underground liquid electric pulse shock wave transmitter is transported at oil reservoir perforation by logging cable；Underground is controlled by surface power supply control device
Liquid electric pulse shock wave transmitter at least exports a not good liquor electric pulse shock wave, and bombardment perforation blocks and periphery rock stratum；Utilize well logging electricity
Underground liquid electric pulse shock wave transmitter is risen from well head by cable, completes this plugging removal and stimulation operation.
Further, liquid electric pulse shock wave transmitter includes：The high temperature capacitor unit that coaxially sets gradually, pulse compression
Unit and liquid electric pulse shock wave generation unit；Wherein, high voltage converting unit is used to low-voltage AC passing through full-bridge or half-bridge
Rectifier system exports high direct voltage；High temperature capacitor unit is used for whole electric fluxs of storing liquid pulse electro discharge；Pulse compression list
Member is used to the energy moment of high temperature capacitor unit being applied to liquid electric pulse shock wave generation unit；Liquid electric pulse shock wave generation unit
Propagated for producing high intensity shock wave and being focused on to external radiation, act on around oil well, realize oil well production increasing.
Wherein, high temperature capacitor unit uses impulse capacitor, is resistant to more than 80 DEG C of underground high temperature.In latter embodiment
In embodiment, using metallization film capacitor, maximum operating temperature is 120 DEG C, and corresponding whole de-plugging of well increasing device is most
Big depth of implements is 4000m.
Its high temperature capacitor unit can use the form of multi-stage cascade, can flexibly be selected according to the job requirements of different oil wells
The parameters such as capacitance, select suitable shock strength.
Further, high temperature capacitor unit includes the impulse capacitor of multi-stage cascade.
Further, pulse compression unit includes pulse compression switch and its control loop；Control loop is used for when height
Output when warm capacitor cell charges to setting voltage is so that the trigger signal that pulse compression switch turns on rapidly；Pulse compression switchs
For after its conducting being applied into liquid electric pulse shock wave generation unit the energy moment of high temperature capacitor unit.
Further, pulse compression switch is gas switch, Triggered Vacuum Switch or other high voltage solid switches.
Further, its liquid electric pulse shock wave generation unit sparking electrode can use rod-plate electrode form, electrode material
Material can use stainless steel, tungsten copper electrode or other electrode materials of resistance to ablation.The paraboloid of revolution is designed to around discharging gap, can be risen
To shock wave focus directional effect, shock wave is set to improve shock wave de-blocking joint-forming effect to radial propagation.
Wherein, the course of work of liquid electric pulse shock wave generation unit is：Liquid electric shock ripple discharging gap is under action of high voltage
Breakdown, by pulse high current, strength shock wave is produced in the electric discharge liquid of weak compressibility in glued membrane sheath, and outwards propagate；
Glued membrane sheath is expanded under strength Shock Wave, and shock wave is delivered in oil well, is acted on and is blocked perforation and periphery rock stratum.
Further, the liquid electric pulse shock wave generation unit includes metal outer cylinder, bar electrode, the plate electricity being coaxially disposed
Pole, insulating fixing piece, glued membrane sheath and electric discharge liquid；The geometric center of metal outer cylinder and plate electrode using the axis of bar electrode as
Axle center is coaxially distributed, and plate electrode can be placed in the bottom inner portion of the metal outer cylinder as negative electrode and be threadably secured just,
Metal outer cylinder, plate electrode, bar electrode are dipped in electric discharge liquid, and electric discharge liquid makes it can with external environment by the sealing of glued membrane sheath
By isolation；Bar electrode is closely connected with insulating fixing piece by screw thread；Glued membrane sheath be used for by the metal outer cylinder, bar electrode,
Plate electrode and insulating fixing piece are strictly enclosed so that the electric discharge liquid is not influenceed by oil well complex fluid environment.
Further, metal outer cylinder uses same high-strength metal material, such as stainless steel, can bear underground height
Static pressure and chemicals attack, and be avoided that because electrochemical reaction caused by different metal material is corroded.
Further, the plate electrode and the insulating fixing piece are paraboloid of revolution structure, meet parabola side
Journey y2=a (x+b)；Wherein y is the axis of sparking electrode, and x is paraboloidal horizontal axis of symmetry line, and a, b are constant, according to sharp
Sphere of action and the operating distance optimization of ripple determine.
Further, the parabola in insulating fixing piece bottom adds surface breakdown distance, for improving electrically absolutely
Edge intensity；And the horizontal median axis of discharging gap is located exactly in the paraboloidal focus of plate electrode and insulating fixing piece composition.
Further, glued membrane sheath is corroded using oil resistant, and operating temperature is higher than 200 DEG C, and elongation is more than 200%
Material.
Further, the material of glued membrane sheath is fluorubber or polyethylene film.
By the contemplated above technical scheme of the present invention, compared with prior art, the present invention has following beneficial effect
Fruit：
(1) present invention produces shock wave based on liquid pulse electro discharge, belongs to pure physics de-plugging Means To Increase Production, dirty in the absence of environment
The problems such as dye.
(2) liquid electric pulse shock wave transmitter of the invention is located in glued membrane sheath, can effectively prevent sandstone etc. to liquid electricity
The blocking of discharging gap, securely and reliably.The paraboloid of revolution is designed to around discharging gap, shock wave focus directional effect can be played,
Shock wave is set to improve shock wave de-blocking joint-forming effect to radial propagation.
(3) capacitor cell of the invention can cascade capacitor cell, disclosure satisfy that under different static pressure, heterogeneity liquid medium
Liquid pulse electro discharge characteristic, as needed produce varying strength shock wave.
(4) the de-plugging of well increasing device shell based on liquid electric pulse shock wave of the invention uses stainless steel, can bear
High static pressure, while electrochemical reaction caused by can avoiding different metal material is corroded.
Brief description of the drawings
Fig. 1 is the structural representation of the de-plugging of well increasing device provided in an embodiment of the present invention based on liquid electric pulse shock wave
Figure.
Fig. 2 is underground liquid electricity arteries and veins in the de-plugging of well increasing device provided in an embodiment of the present invention based on liquid electric pulse shock wave
The structural representation of impulse wave launcher.
Fig. 3 is in the de-plugging of well increasing device provided in an embodiment of the present invention based on liquid electric pulse shock wave between liquid discharge of electricity
Gap and the structural representation of glued membrane sheath.
Fig. 4 is provided in an embodiment of the present invention based on the typical voltage of liquid electric pulse shock wave de-plugging of well increasing device, electricity
Stream and shock wave waveform diagram.
Fig. 5 (a) is in the prior art in the schematic diagram of laboratory simulation de-plugging of well effect；(b) it is the embodiment of the present invention
There is provided based on liquid electric pulse shock wave de-plugging of well increasing device laboratory simulation de-plugging of well effect schematic diagram.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Significantly yield-increasing technology is that modern high technology is theoretical to oil based on liquid electric pulse shock wave principle --- pulse
Power technology is applied to the development technique in oil gas field, by producing strength liquid electric pulse shock wave in underground oil layer section, solves oil removing
Field perforation blocks, and increase formation fractures promote the infiltration of oil, realize volume increase.This method is pure physics Means To Increase Production, is relatively passed
For the method for removing blockage of system, in the absence of problem of environmental pollution, while have that safe and efficient, construction technology is simple, the activity duration is short
The features such as.This method coal bed gas, shale gas exploitation in also have broad application prospects.
Fig. 1 shows the structure of the de-plugging of well increasing device provided in an embodiment of the present invention based on liquid electric pulse shock wave,
For convenience of description, the part related to the embodiment of the present invention is illustrate only, existing details are as follows：
A kind of de-plugging of well increasing device based on liquid electric pulse shock wave provided by the invention, including the power supply positioned at ground
Control device 101, logging cable 102 and the liquid electric pulse shock wave transmitter 103 for being arranged at underground；Liquid electric pulse shock wave transmitter
103 connect power supply control apparatus 101 by logging cable 102.
In embodiments of the present invention, the workflow of the de-plugging of well increasing device based on liquid electric pulse shock wave is：
Plugging removal and stimulation job specification is formulated according to oil well situation and field demand；
Underground liquid electric pulse shock wave transmitter 103 is transported at oil reservoir perforation 104 using logging cable 102；
Underground liquid electric pulse shock wave transmitter 103 is controlled at least to export not good liquor electricity by surface power supply control device 101
Pulse shock wave, bombardment perforation blocks and periphery rock stratum；
Underground liquid electric pulse shock wave transmitter 103 is risen from into well head using logging cable 102, this plugging removal and stimulation is completed and makees
Industry.
In embodiments of the present invention, surface power supply control device 101 can use 220V/50Hz, 380V/50Hz or other
AC and DC power supply, it is converted into voltage of intermediate frequency and underground liquid electric pulse shock wave transmitter 103 is transferred to by logging cable 102.
In embodiments of the present invention, logging cable can use special oil well cable, using special halter and underground
Liquid electric pulse shock wave transmitter 103 is connected, and has transmission electric energy and weight-bearing function.
In embodiments of the present invention, can by the use of logging cable 102 itself inductance and resistance as protection element, without
Apply new current-limiting protection element.
In embodiments of the present invention, underground liquid electric pulse shock wave transmitter 103 includes high voltage converting unit 201, high temperature
Capacitor cell 202, pulse compression unit 203 and liquid electric pulse shock wave generation unit 204；Unit both ends are provided with connecing for speciality
Mouthful, the interface can not only be coordinated by the screw thread of interface strictly seals unit, ensures that unit is in coaxial configuration,
Increase its mechanical strength；And ensure good electrical connection between the unit of liquid electric pulse shock wave transmitter 103.
Wherein, high voltage converting unit 201 uses intermediate frequency step-up transformer combination full-bridge or Half bridge rectifier scheme, utilizes height
Warm capacitor cell 202 is used as filter unit, and high temperature capacitor unit 202 is charged into setting voltage in design time.
High temperature capacitor unit 202 uses impulse capacitor, is resistant to more than 80 DEG C of underground high temperature.It is real in latter embodiment
Apply in example, using metallization film capacitor, maximum operating temperature is 120 DEG C, the maximum of corresponding whole de-plugging of well increasing device
Depth of implements is 4000m.
Pulse compression unit 203 includes pulse compression switch and its control loop.
As one embodiment of the present of invention, pulse compression switch can use gas switch, Triggered Vacuum Switch or other
High voltage solid switch.Once high temperature capacitor unit 202 charges to setting voltage, control loop output trigger signal, make pulse
Compression switch is turned on rapidly, and the energy moment of high temperature capacitor unit 202 is applied into liquid electric pulse shock wave generation unit 204.
Liquid electric pulse shock wave generation unit 204 is based on liquid electricity gap discharge mode, and outside uses glued membrane sheath, can avoided
Silt blocks shock wave generation gap during underground work.Glued membrane has oil resistant corrosion, and operating temperature is higher than 200 DEG C, and elongation is more than
200%.
The sparking electrode of liquid electric pulse shock wave generation unit 204 can use rod-plate electrode form, and electrode material can use not
Become rusty steel, tungsten copper electrode or other electrode materials of resistance to ablation.The typical structure composition of liquid electric pulse shock wave generation unit 204 includes gold
Belong to outer barrel 301, bar electrode 302, plate electrode 303, insulating fixing piece 304, glued membrane sheath 305 and electric discharge liquid 306.Efficient liquid electricity
The unit of pulse shock wave generation unit 204 is coaxial configuration, is easy to realize slitless connection with pulse compression unit 203, subtracts
Small-pulse effect transmission loss and raising mechanical strength.
Wherein plate electrode 303, insulating fixing piece 304 are designed to the paraboloid of revolution, and bar electrode 302 and insulating fixing piece
304 are closely connected by screw thread.The parabola of the bottom of insulating fixing piece 304 adds surface breakdown distance, improves electric insulation
Intensity；The paraboloidal focus that the horizontal median axis of discharging gap is located exactly at plate electrode 303 and insulating fixing piece 304 forms,
The shock wave that gone directly according to linear reflective law, caused by liquid electric pulse arc discharge can be radiated radially with reflected shock wave, effectively be carried
Impulse intensity of wave at high shock wave focus orientation, while the coaxial result of bar electrode 302, plate electrode 303 and insulating fixing piece 304
The overall mechanical strength of shock wave transmitter can be lifted, reduces the damage to insulation fabric part.Parabola equation is y2=a (x+
b)……(1)；Wherein, a, b are constant, are determined according to the sphere of action of shock wave and operating distance optimization.
Wherein glued membrane sheath 305 is corroded using oil resistant, and operating temperature is higher than 200 DEG C, and elongation is more than 200% material,
For example fluorubber, polyethylene film etc., glued membrane sheath 305 can be by metal outer cylinder 301, bar electrode 302, plate electrode 303 and insulation
Fixture 304 is strictly closed, and ensures that the electric discharge liquid 306 in parabolic cavity is not influenceed by oil well complex fluid environment, can
Reduce the energy leakage of Preliminary breakdown process, improve the stability of liquid electric pulse arc discharge and its intensity of shock wave.
The course of work of liquid electric pulse shock wave generation unit 204 is：
Liquid electric shock ripple discharging gap punctures under action of high voltage, by pulse high current, the weak compression in glued membrane sheath
Property electric discharge liquid in produce strength shock wave, and outwards propagate；
Glued membrane sheath is expanded under strength Shock Wave, and shock wave is delivered in oil well, is acted on and is blocked perforation and periphery
Rock stratum.
In order to which the further description de-plugging of well provided in an embodiment of the present invention based on liquid electric pulse shock wave increases production dress
Put, in conjunction with accompanying drawing and instantiation, details are as follows：
As shown in figure 1, the de-plugging of well increasing device of the invention based on liquid electric pulse shock wave includes surface power supply control dress
Put 101, logging cable 102 and underground liquid electric pulse shock wave transmitter 103.Surface power supply control device 101 can use 220V/
50Hz alternating current generator is not less than 10kW, transports, be easy to operate as power supply, the power of generator.Surface power supply control
220V/50Hz power-frequency voltage is changed into 1.8kV/1kHz voltage of intermediate frequency by device 101 processed.Logging cable 102 is exhausted using FEP
Edge charge bearing detecting cable, model WFEP-16.5, rated voltage 6kV, cable resistance are 30 Ω/km.Logging cable 102 is another
One end is connected by halter with underground liquid electric pulse shock wave transmitter 103.
The external diameter of underground liquid electric pulse shock wave transmitter 103 is 102mm, total length 5.7m.The conversion of its high voltage appearance is single
It is 30kV that member 201, which exports DC voltage,.The single-stage capacitance of high temperature capacitor unit 202 is 1.5 μ F, rated voltage 30kV.This
Using 2 grades of cascades in embodiment, the capacitance of high temperature capacitor unit is 3.0 μ F, and specified energy storage is 1.35kJ, operating temperature ratings
For 120 DEG C, the life-span is more than 10000 times.Pulse compression unit 203 uses Triggered Vacuum Switch, rated voltage 30kV, maximum electricity
Stream peak value is 50kA, and charge transfer quantity is more than 100kC.The output control signal amplitude of trigger control unit is 15kV, rising edge
Less than 0.5 μ s.
Liquid electric pulse shock wave generation unit 204 uses stainless steel discharge electrode.The material percentage elongation of glued membrane sheath is
350%, stabilized operating temperature is 300 DEG C.As shown in figure 3, the paraboloid of revolution is designed to around its sparking electrode, parabola equation
For：y2=20 (x+5) ... (2)；The basic parameter of underground liquid electric pulse shock wave transmitter 103 is：Rated voltage is 30kV, volume
Determine energy storage be 1.35kJ, external diameter 102mm, length 5.7m, working frequency are 5-10 beats/min, maximum operation depth be 4km,
Life-span is more than 10000 times (removable parts device can extend the life-span).
Fig. 4 show the typical liquid discharge of electricity electricity of the de-plugging of well increasing device based on liquid electric pulse shock wave of the present embodiment
Pressure, electric current and shock wave waveform.The peak-peak of discharge current is 14kA, and cycle of oscillation is 33 μ s.Wherein shock wave measurement probe away from
Horizontal range from shock wave transmitter center position is 17cm, and the shock strength for measuring to obtain is 6MPa, and pulsewidth is about 40 μ s, is swashed
The transfer rate of ripple in a liquid is about 1500m/s.
Fig. 5 show the de-plugging of well increasing device based on liquid electric pulse shock wave of the present embodiment in laboratory simulation oil well
Plugging removal and stimulation design sketch.Cement tube simulation oil well structure, inside is stainless steel inner cylinder, and surface is provided with a diameter of 20mm hole, mould
Intend perforation.The thickness of outside cement layer is 12mm, after a not good liquor electric pulse Shock Wave, the plugging hole in sphere of action
100% is dredged.
The de-plugging of well increasing device based on liquid electric pulse shock wave of the present embodiment, its workflow are：
Plugging removal and stimulation job specification is formulated according to oil well situation and field demand；
Underground liquid electric pulse shock wave transmitter 103 is transported at oil reservoir perforation 104 using logging cable 102；
Underground liquid electric pulse shock wave transmitter is controlled at least to export a not good liquor electric pulse by surface power supply control device 101
Shock wave, bombardment perforation blocks and periphery rock stratum；
Underground liquid electric pulse shock wave transmitter 103 is risen from into well head using logging cable 102, this plugging removal and stimulation is completed and makees
Industry.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (8)
- A kind of 1. de-plugging of well increasing device based on liquid electric pulse shock wave, it is characterised in that including：Power supply control positioned at ground Device (101) processed, it is arranged at the liquid electric pulse shock wave transmitter (103) of underground and for connecting the power supply control apparatus (101) and the liquid electric pulse shock wave transmitter (103) logging cable (102)；The liquid electric pulse shock wave transmitter (103) For producing high intensity shock wave and focusing on propagation to external radiation by focusing on cavity, oil well is bombarded after glued membrane sheath, is realized Oil well production increasing；The liquid electric pulse shock wave transmitter (103) includes：The high voltage converting unit (201) that coaxially sets gradually, high-temperature electric Hold unit (202), pulse compression unit (203) and liquid electric pulse shock wave generation unit (204)；The high voltage converting unit (201) is used to low-voltage AC exporting direct current height by full-bridge or Half bridge rectifier mode Pressure；The high temperature capacitor unit (202) is used for whole electric fluxs of storing liquid pulse electro discharge；The pulse compression unit (203) is used to the energy moment of high temperature capacitor unit (202) being applied to liquid electric pulse shock wave Generation unit (204)；The liquid electric pulse shock wave generation unit (204) is used to produce high intensity shock wave and focus on to external radiation to propagate, effect oil Around well, oil well production increasing is realized；Glued membrane sheath (305) is corroded using oil resistant, and operating temperature is higher than 200 DEG C, and elongation is more than 200% material.
- 2. de-plugging of well increasing device as claimed in claim 1, it is characterised in that the high temperature capacitor unit (202) includes The impulse capacitor of multi-stage cascade.
- 3. de-plugging of well increasing device as claimed in claim 1, it is characterised in that the pulse compression unit (203) includes Pulse compression switch and its control loop；The control loop is used to export so that the pulse compression is opened when high temperature capacitor unit (202) charges to setting voltage Close the trigger signal turned on rapidly；The pulse compression is switched for after its conducting being applied into the liquid electricity energy moment of high temperature capacitor unit (202) Pulse shock wave generation unit (204).
- 4. de-plugging of well increasing device as claimed in claim 3, it is characterised in that the pulse compression switch is gas switch Or Triggered Vacuum Switch.
- 5. the de-plugging of well increasing device as described in claim any one of 1-4, it is characterised in that the liquid electric pulse shock wave production Metal outer cylinder (301) that raw unit (204) includes being coaxially disposed, bar electrode (302), plate electrode (303), insulating fixing piece (304), glued membrane sheath (305) and electric discharge liquid (306)；The geometric center of the metal outer cylinder (301) and the plate electrode (303) is using the axis of the bar electrode (302) as axle The heart is coaxially distributed, and the plate electrode (303) can be placed in the bottom inner portion of the metal outer cylinder (301) as negative electrode and lead to just Cross and be screwed, the metal outer cylinder (301), the plate electrode (303), the bar electrode (302) are dipped in the electric discharge liquid Body (306), the electric discharge liquid (306) make it reliably isolate with external environment by glued membrane sheath (305) sealing；The bar electrode (302) is closely connected with the insulating fixing piece (304) by screw thread；The glued membrane sheath (305) is used for the metal outer cylinder (301), the bar electrode (302), the plate electrode (303) Strictly it is enclosed so that the electric discharge liquid (306) not by the shadow of oil well complex fluid environment with the insulating fixing piece (304) Ring.
- 6. de-plugging of well increasing device as claimed in claim 5, it is characterised in that the plate electrode (303) and the insulation Fixture (304) is paraboloid of revolution structure, meets parabola equation y2=a (x+b)；Wherein, y is the axis of sparking electrode Line, x are paraboloidal horizontal axis of symmetry line, and a, b are constant, are determined according to the sphere of action of shock wave and operating distance optimization.
- 7. de-plugging of well increasing device as claimed in claim 6, it is characterised in that in the insulating fixing piece (304) bottom Parabola add surface breakdown distance, for improving electrical insulation strength；And the lucky position of horizontal median axis of discharging gap In in the paraboloidal focus that the plate electrode (303) and the insulating fixing piece (304) form.
- 8. de-plugging of well increasing device as claimed in claim 1, it is characterised in that the material of the glued membrane sheath (305) is Fluorubber or polyethylene film.
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