CN105952426A - Oil well plug removal and output increase device based on hydro-electric pulse shock waves - Google Patents
Oil well plug removal and output increase device based on hydro-electric pulse shock waves Download PDFInfo
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- CN105952426A CN105952426A CN201610471227.3A CN201610471227A CN105952426A CN 105952426 A CN105952426 A CN 105952426A CN 201610471227 A CN201610471227 A CN 201610471227A CN 105952426 A CN105952426 A CN 105952426A
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- shock wave
- electric pulse
- pulse shock
- plugging
- liquid
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses an oil well plug removal and output increase device based on hydro-electric pulse shock waves. The oil well plug removal and output increase device comprises a ground power supply control device, a logging cable and an underground electric pulse shock wave transmitter. During working, the logging cable enables the underground electric pulse shock wave transmitter to be arranged at an underground oil layer perforation, and the times and repeating frequency of the hydro-electric pulse shock waves are set by controlling the ground power supply control device. The hydro-electric pulse shock waves impact an obstruction at the oil layer perforation and crush the obstruction so as to enter an oil tube and remove a plug at the perforation. Meanwhile, the hydro-electric pulse shock waves are propagated towards the radial direction through a sheath, act on an oil storage rock stratum at the perforation to increase crack s and further improve the permeability of crude oil. The crude oil output of an oil well can be remarkably increased through perforation plug removal and rock stratum crack increase. Compared with traditional chemical plug removal, fracturing plug removal and other methods, an oil well plug removal and output increase method based on the hydro-electric pulse shock waves is a pure physical plug removal and output increase method, has the advantages of being simple in operation, remarkable in effect, environmentally friendly, low in cost and the like and is expected to be applied to the fields of exploitation of shale gases, mineral products.
Description
Technical field
The invention belongs to High-Voltage Technology, Pulse Power Techniques and oil-gas mining field, more specifically,
Relate to a kind of de-plugging of well increasing device based on liquid electric pulse shock wave.
Background technology
During oil exploitation, owing to crude oil containing a large amount of sandstones and gelatin substance, exploit for a long time
The most easily occur that perforation blocks, cause well oil output to decline.Some oil wells is owing to oil content is low and blocks up
Plug is serious, uses conventional method for removing blockage relatively costly, is rejected and becomes dry well.At present the most in the world 30
Old filed annual production more than year accounts for the 70% of whole world yield, and in oil incremental reserves, 75% from always
Oil field.There is the situation of the underproduction because of contamination and plugging in new old filed, outstanding in old filed to some extent
It is serious.China's oil well geology is rocky, and oil reservoir is thin and mining depth is relatively deep, and China goes up according to statistics
Ten thousand mouthfuls of oil wells are because blocking is without oil-producing.
Conventional de-plugging of well Means To Increase Production mainly includes chemical plugging removal, pressure break de-plugging, ultrasound wave de-plugging
Deng.Chemical plugging removal method for increasing implementing process is complicated, and chemical substance storage, transport are more dangerous, need
Activity duration that will be longer, and the ecological problem (such as underground water pollution etc.) brought constrains the party
The extensive application of method.Pressure break removal and stimulation method operation technique is complicated, brings serious underground water pollution,
Fracturing method for removing blockage is prohibitted the use of by European Union member countries such as France at present.Ultrasound wave method for removing blockage is tied
Structure is relatively simple, and operation technique is simple, but is difficult to produce strong ultrasound wave inside deep-well,
Plugging removal effect is limited.
Summary of the invention
For the defect of existing block releasing technique, it is an object of the invention to provide a kind of simple in construction, work
De-plugging of well based on the liquid electric pulse shock wave volume increase that industry technique is simple, environmentally friendly, with low cost
Device.
The invention provides a kind of de-plugging of well increasing device based on liquid electric pulse shock wave, including: position
Power supply control apparatus in ground, it is arranged at the liquid electric pulse shock wave emitter of down-hole and for even
Connect power supply control apparatus and the logging cable of liquid electric pulse shock wave emitter；Liquid electric pulse shock wave emitter
For producing high intensity shock wave and focusing on propagation, around effect oil well, it is achieved oil well production increasing to external radiation.
Wherein, specific works process is as follows: formulates plugging removal and stimulation according to oil well situation and field demand and makees
Industry specification；Logging cable is utilized to be transported at oil reservoir perforation by underground liquid electric pulse shock wave emitter；Logical
Cross surface power supply control device control underground liquid electric pulse shock wave emitter and at least export a not good liquor electric pulse
Shock wave, bombardment perforation blocking and periphery rock stratum；Logging cable is utilized to be launched by underground liquid electric pulse shock wave
Device emersion well head, completes this plugging removal and stimulation operation.
Further, liquid electric pulse shock wave emitter includes: the high temperature capacitor list coaxially set gradually
Unit, pulse compression unit and liquid electric pulse shock wave generation unit；Wherein, high voltage converting unit is used for
Low-voltage AC is exported high direct voltage by full-bridge or Half bridge rectifier mode；High temperature capacitor unit is used for
Store whole electric fluxs of liquid pulse electro discharge；Pulse compression unit is for by the energy of high temperature capacitor unit
Amount moment is applied to liquid electric pulse shock wave generation unit；Liquid electric pulse shock wave generation unit is used for producing height
Intensity shock wave also focuses on propagation, around effect oil well, it is achieved oil well production increasing to external radiation.
Wherein, high temperature capacitor unit uses impulse capacitor, it is possible to tolerate the down-hole high temperature of more than 80 DEG C.
In latter embodiment embodiment, using metallization film capacitor, maximum operating temperature is 120 DEG C, corresponding
The maximum operation degree of depth of whole de-plugging of well increasing device is 4000m.
Its high temperature capacitor unit can be to use the form of multi-stage cascade, can be according to the operation need of different oil wells
Ask and select the parameters such as capacitance flexibly, 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 controls loop；Control back
Road makes the conducting rapidly of pulse compression switch for the output when high temperature capacitor unit charges to setting voltage
Triggering signal；The energy moment of high temperature capacitor unit is executed after turning at it by pulse compression switch
It is added to liquid electric pulse shock wave generation unit.
Further, pulse compression switch is gas switch, Triggered Vacuum Switch or other high voltage
Solid switch.
Further, its liquid electric pulse shock wave generation unit sparking electrode can use rod-plate electrode shape
Formula, electrode material can use rustless steel, tungsten copper electrode or other electrode material of resistance to ablation.Discharging gap
Around be designed to the paraboloid of revolution, shock wave focus directional effect can be played, make shock wave to radial propagation,
Shock wave de-blocking joint-forming effect can be improved.
Wherein, the work process of liquid electric pulse shock wave generation unit is: liquid electric shock ripple discharging gap is at height
Puncture under voltage effect, by pulse high current, in glued membrane sheath in the electric discharge liquid of weak compressibility
Produce strength shock wave, and outwards propagate；Glued membrane sheath expands under strength Shock Wave, is passed by shock wave
It is delivered in oil well, acts on blocking perforation and periphery rock stratum.
Metal outer cylinder that further, described liquid electric pulse shock wave generation unit includes being coaxially disposed,
Bar electrode, plate electrode, insulating fixing piece, glued membrane sheath and electric discharge liquid；Metal outer cylinder and plate electrode
Geometric center be coaxially distributed with the axis of bar electrode for axle center, and plate electrode just may be used as negative electrode
It is placed in the bottom inner portion of described metal outer cylinder and is threadably secured, metal outer cylinder, plate electrode, rod electricity
The most all being dipped in electric discharge liquid, electric discharge liquid is sealed by glued membrane sheath and makes it reliably isolate with external environment；
Bar electrode and insulating fixing piece are by screw thread compact siro spinning technology；Glued membrane sheath for by described metal outer cylinder,
Bar electrode, plate electrode and insulating fixing piece are strictly enclosed so that described electric discharge liquid is not complicated by oil well
The impact of liquid environment.
Further, metal outer cylinder all uses same high-strength metal material, such as rustless steel, energy
Enough bear down-hole high static state pressure and chemicals attack, and be avoided that owing to different metal material causes
Electrochemical reaction corrosion.
Further, described plate electrode and described insulating fixing piece are paraboloid of revolution structure, full
Foot parabola equation y2=a (x+b)；Wherein y is the axis of sparking electrode, and x is paraboloidal
Horizontal axis of symmetry line, a, b are constant, and sphere of action and operating distance optimization according to shock wave determine.
Further, the parabola in insulating fixing piece bottom adds surface breakdown distance, is used for
Improve electrical insulation strength；And the horizontal median axis of discharging gap is located exactly at plate electrode and insulation is fixing
In the paraboloidal focus of part composition.
Further, glued membrane sheath uses resistance to oil corrosion, and operating temperature is higher than 200 DEG C, and percentage elongation
Material more than 200%.
Further, the material of glued membrane sheath is fluorubber or polyethylene film.
By the above technical scheme that the present invention is contemplated, compared with prior art, the present invention have with
Under beneficial effect:
(1) present invention produces shock wave based on liquid pulse electro discharge, belongs to pure physics de-plugging Means To Increase Production,
There is not the problems such as environmental pollution.
(2) the liquid electric pulse shock wave emitter of the present invention is positioned at glued membrane sheath, it is possible to effectively prevent sand
The blocking to liquid discharge of electricity gap such as stone, safe and reliable.The paraboloid of revolution it is designed to around discharging gap,
Shock wave focus directional effect can be played, make shock wave to radial propagation, shock wave de-blocking joint-forming effect can be improved.
(3) capacitor cell of the present invention can cascade capacitor cell, it is possible to meets different static pressure, different one-tenth
Divide the liquid pulse electro discharge characteristic under liquid medium, produce the shock wave of varying strength as required.
(4) the de-plugging of well increasing device shell based on liquid electric pulse shock wave of the present invention uses stainless
Steel, it is possible to bearing high static pressure, the electrochemical reaction that different metal material simultaneously can be avoided to cause is rotten
Erosion.
Accompanying drawing explanation
Fig. 1 is the de-plugging of well increasing device based on liquid electric pulse shock wave that the embodiment of the present invention provides
Structural representation.
Fig. 2 is in the de-plugging of well increasing device based on liquid electric pulse shock wave that the embodiment of the present invention provides
The structural representation of underground liquid electric pulse shock wave emitter.
Fig. 3 is in the de-plugging of well increasing device based on liquid electric pulse shock wave that the embodiment of the present invention provides
Liquid discharge of electricity gap and the structural representation of glued membrane sheath.
Fig. 4 is the typical based on liquid electric pulse shock wave de-plugging of well increasing device of embodiment of the present invention offer
Voltage, electric current and shock wave waveform diagram.
Fig. 5 (a) is the schematic diagram in prior art in laboratory simulation de-plugging of well effect；B () is
It is oily in laboratory simulation based on liquid electric pulse shock wave de-plugging of well increasing device that the embodiment of the present invention provides
The schematic diagram of well plugging removal effect.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And embodiment, the present invention is further elaborated.Should be appreciated that described herein specifically
Embodiment only in order to explain the present invention, is not intended to limit the present invention.
Oil significantly yield-increasing technology based on liquid electric pulse shock wave principle is that modern high technology is theoretical
Pulse Power Techniques are applied to the development technique in oil gas field, strong by producing at downhole oil interval
Power liquid electric pulse shock wave, releases oil field perforation blocking, increases formation fractures and promotes the infiltration of oil, it is achieved
Volume increase.The method is physics Means To Increase Production purely, for more traditional method for removing blockage, there is not ring
Environment pollution problem, has the features such as safe and efficient, construction technology is simple, the activity duration is short simultaneously.Should
Method coal bed gas, shale gas exploitation in also have broad application prospects.
Fig. 1 shows de-plugging of well based on the liquid electric pulse shock wave volume increase dress that the embodiment of the present invention provides
The structure put, for convenience of description, illustrate only the part relevant to the embodiment of the present invention, existing detailed description
As follows:
A kind of based on liquid electric pulse shock wave the de-plugging of well increasing device that the present invention provides, including being positioned at
The power supply control apparatus 101 on ground, logging cable 102 and be arranged at down-hole liquid electric pulse shock wave launch
Device 103；Liquid electric pulse shock wave emitter 103 connects power supply control apparatus 101 by logging cable 102.
In embodiments of the present invention, the workflow of de-plugging of well increasing device based on liquid electric pulse shock wave
Cheng Wei:
Plugging removal and stimulation job specification is formulated according to oil well situation and field demand；
Utilize logging cable 102 that underground liquid electric pulse shock wave emitter 103 is transported to oil reservoir perforation 104
Place；
Underground liquid electric pulse shock wave emitter 103 is controlled the most defeated by surface power supply control device 101
Go out a not good liquor electric pulse shock wave, bombardment perforation blocking and periphery rock stratum；
Utilize logging cable 102 that underground liquid electric pulse shock wave emitter 103 is risen from well head, complete this
Secondary plugging removal and stimulation operation.
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, be converted into voltage of intermediate frequency by logging cable 102
It is transferred to underground liquid electric pulse shock wave emitter 103.
In embodiments of the present invention, logging cable can use special oil well cable, uses special horse
Tap is connected with underground liquid electric pulse shock wave emitter 103, has transmission electric energy and weight-bearing function.
In embodiments of the present invention, it is possible to use the inductance of logging cable 102 self and resistance are as guarantor
Protection element, it is not necessary to apply new current-limiting protection element.
In embodiments of the present invention, underground liquid electric pulse shock wave emitter 103 includes that high voltage conversion is single
Unit 201, high temperature capacitor unit 202, pulse compression unit 203 and liquid electric pulse shock wave generation unit 204；
Unit two ends have the interface of speciality, this interface not only by the threaded engagement of interface by each
Unit strict seal, it is ensured that unit is in coaxial configuration, increases its mechanical strength；And ensure
Electrical connection good between liquid electric pulse shock wave emitter 103 unit.
Wherein, high voltage converting unit 201 uses intermediate frequency booster transformer to combine full-bridge or Half bridge rectifier
Scheme, utilize high temperature capacitor unit 202 as filter unit, by high temperature capacitor list within the design time
Unit 202 charges to setting voltage.
High temperature capacitor unit 202 uses impulse capacitor, it is possible to tolerate the down-hole high temperature of more than 80 DEG C.
In latter embodiment embodiment, using metallization film capacitor, maximum operating temperature is 120 DEG C, corresponding
The maximum operation degree of depth of whole de-plugging of well increasing device is 4000m.
Pulse compression unit 203 includes pulse compression switch and controls loop.
As one embodiment of the present of invention, pulse compression switch can use gas switch, Laser triggered
Switch or other high voltage solid switch.Once high temperature capacitor unit 202 charges to setting voltage, control
Loop processed output triggers signal, makes the conducting rapidly of pulse compression switch, by high temperature capacitor unit 202
Energy moment is applied to 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 employing glued membrane protects
Set, it is possible to when avoiding underground work, silt blocking shock wave occurs gap.Glued membrane has resistance to oil corrosion, work
Making temperature and be higher than 200 DEG C, percentage elongation is more than 200%.
Liquid electric pulse shock wave generation unit 204 sparking electrode can be to use rod-plate electrode form, electrode material
Material can use rustless steel, tungsten copper electrode or other electrode material of resistance to ablation.Liquid electric pulse shock wave produces single
The typical structure composition of unit 204 includes metal outer cylinder 301, bar electrode 302, plate electrode 303, insulation
Fixture 304, glued membrane sheath 305 and electric discharge liquid 306.High-efficient liquid electric pulse shock wave generation unit 204
Unit be coaxial configuration, it is simple to realize slitless connection with pulse compression unit 203, reduce arteries and veins
Rush loss and improve mechanical strength.
Wherein plate electrode 303, insulating fixing piece 304 are designed to the paraboloid of revolution, and bar electrode 302
With insulating fixing piece 304 by screw thread compact siro spinning technology.The parabola of insulating fixing piece 304 bottom increases
Surface breakdown distance, improves electrical insulation strength；The horizontal median axis of discharging gap is located exactly at plate
Electrode 303 and the paraboloidal focus of insulating fixing piece 304 composition, according to linear reflective law, liquid
The through shock wave that electric pulse arc discharge produces can radially radiate with reflected shock wave, is effectively improved shock wave
Focus on the bow wave intensity at orientation, bar electrode 302, plate electrode 303 and insulating fixing piece 304 simultaneously
Coaxial result can promote the overall mechanical strength of shock wave emitter, reduce the damage to insulation fabric part.
Parabola equation is y2=a (x+b) ... (1)；Wherein, a, b are constant, according to shock wave
Sphere of action and operating distance optimization determine.
Wherein glued membrane sheath 305 uses resistance to oil corrosion, and operating temperature is higher than 200 DEG C, and percentage elongation is more than
The material of 200%, such as fluorubber, polyethylene film etc., glued membrane sheath 305 can by metal outer cylinder 301,
Bar electrode 302, plate electrode 303 and insulating fixing piece 304 are strictly closed, it is ensured that in parabolic cavity
Electric discharge liquid 306 do not affected by oil well complex fluid environment, the energy of Preliminary breakdown process can be reduced
Reveal, improve stability and the intensity of shock wave thereof of liquid electric pulse arc discharge.
The work process 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, protects at glued membrane
Produce strength shock wave in set in the electric discharge liquid of weak compressibility, and outwards propagate；
Glued membrane sheath expands under strength Shock Wave, is delivered in oil well by shock wave, acts on blocking
Perforation and periphery rock stratum.
The oil well solution based on liquid electric pulse shock wave provided for the further description embodiment of the present invention
Stifled increasing device, in conjunction with accompanying drawing and instantiation, details are as follows:
As it is shown in figure 1, present invention de-plugging of well increasing device based on liquid electric pulse shock wave includes ground
Power supply control apparatus 101, logging cable 102 and underground liquid electric pulse shock wave emitter 103.Ground supplies
Controller for electric consumption 101 can use the alternating current generator of 220V/50Hz as power supply, electromotor
Power be not less than 10kW, transport, easy to operate.Surface power supply controls device 101 by 220V/50Hz
Power-frequency voltage be changed into the voltage of intermediate frequency of 1.8kV/1kHz.Logging cable 102 uses FEP insulation to hold
Lotus detection cable, model is WFEP-16.5, and rated voltage is 6kV, and cable resistance is 30 Ω/km.
Logging cable 102 other end is connected with underground liquid electric pulse shock wave emitter 103 by halter.
The external diameter of underground liquid electric pulse shock wave emitter 103 is 102mm, and total length is 5.7m.Wherein
It is 30kV that high voltage converting unit 201 exports DC voltage.The single-stage electric capacity of high temperature capacitor unit 202
Amount is 1.5 μ F, and rated voltage is 30kV.The present embodiment uses 2 grades of cascades, high temperature capacitor unit
Capacitance be 3.0 μ F, specified energy storage is 1.35kJ, and operating temperature ratings is 120 DEG C, and the life-span is more than
10000 times.Pulse compression unit 203 uses Triggered Vacuum Switch, and rated voltage is 30kV, maximum
Current peak is 50kA, and charge transfer quantity is more than 100kC.The output control signal of trigger control unit
Amplitude is 15kV, and rising edge is less than 0.5 μ s.
Liquid electric pulse shock wave generation unit 204 uses stainless steel discharge electrode.The material of glued membrane sheath is stretched
Long rate is 350%, and stabilized operating temperature is 300 DEG C.As it is shown on figure 3, design around its sparking electrode
Becoming the paraboloid of revolution, parabola equation is: y2=20 (x+5) ... (2)；Underground liquid electric pulse
The basic parameter of shock wave emitter 103 is: rated voltage is 30kV, specified energy storage is 1.35kJ, outward
Footpath is 102mm, a length of 5.7m, operating frequency are 5-10 beat/min, the maximum operation degree of depth is 4km,
Life-span is more than 10000 times (removable parts device can extend the life-span).
Fig. 4 show the typical case of the de-plugging of well increasing device based on liquid electric pulse shock wave of the present embodiment
Liquid discharge of electricity voltage, electric current and shock wave waveform.The peak-peak of discharge current is 14kA, cycle of oscillation
It is 33 μ s.Wherein the horizontal range of shock wave measurement probe distance shock wave emitter center position is 17cm,
Measuring the shock strength obtained is 6MPa, and pulsewidth is about 40 μ s, and shock wave transfer rate in a liquid is about
For 1500m/s.
Fig. 5 show the de-plugging of well increasing device based on liquid electric pulse shock wave of the present embodiment in experiment
Room simulation oil well plugging removal and stimulation design sketch.Cement tube simulation oil well structure, inside is rustless steel inner core,
Surface has the hole of a diameter of 20mm, analogue perforation.The thickness of outside water mud layer is 12mm, passes through
After one not good liquor electric pulse Shock Wave, the plugging hole 100% in sphere of action is dredged.
The de-plugging of well increasing device based on liquid electric pulse shock wave of the present embodiment, its workflow is:
Plugging removal and stimulation job specification is formulated according to oil well situation and field demand；
Utilize logging cable 102 that underground liquid electric pulse shock wave emitter 103 is transported to oil reservoir perforation 104
Place；
Control underground liquid electric pulse shock wave emitter by surface power supply control device 101 and at least export one
Not good liquor electric pulse shock wave, bombardment perforation blocking and periphery rock stratum；
Utilize logging cable 102 that underground liquid electric pulse shock wave emitter 103 is risen from well head, complete this
Secondary plugging removal and stimulation operation.
As it will be easily appreciated by one skilled in the art that and the foregoing is only presently preferred embodiments of the present invention,
Not in order to limit the present invention, all made within the spirit and principles in the present invention any amendment, etc.
With replacement and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a de-plugging of well increasing device based on liquid electric pulse shock wave, it is characterised in that including:
The power supply control apparatus (101) being positioned at ground, liquid electric pulse shock wave emitter (103) being arranged at down-hole,
And be used for connecting described power supply control apparatus (101) and described liquid electric pulse shock wave emitter (103)
Logging cable (102)；Described liquid electric pulse shock wave emitter (103) is used for producing high intensity shock wave
And focus on propagation by focusing on cavity to external radiation, after glued membrane, bombard oil well, it is achieved oil well production increasing.
2. de-plugging of well increasing device as claimed in claim 1, it is characterised in that described liquid electricity arteries and veins
Bow wave emitter (103) including: the high voltage converting unit (201) that coaxially sets gradually, high temperature
Capacitor cell (202), pulse compression unit (203) and liquid electric pulse shock wave generation unit (204)；
Described high voltage converting unit (201) is for passing through full-bridge or Half bridge rectifier side by low-voltage AC
Formula output high direct voltage；
Described high temperature capacitor unit (202) is for storing whole electric fluxs of liquid pulse electro discharge；
Described pulse compression unit (203) is for executing the energy moment of high temperature capacitor unit (202)
It is added to liquid electric pulse shock wave generation unit (204)；
Described liquid electric pulse shock wave generation unit (204) is used for producing high intensity shock wave and gathering to external radiation
Burnt propagation, around effect oil well, it is achieved oil well production increasing.
3. de-plugging of well increasing device as claimed in claim 2, it is characterised in that described high-temperature electric
Hold unit (202) and include the impulse capacitor of multi-stage cascade.
4. de-plugging of well increasing device as claimed in claim 2, it is characterised in that described pulse pressure
Contracting unit (203) includes pulse compression switch and controls loop；
Described control loop makes for exporting when high temperature capacitor unit (202) charges to setting voltage
The triggering signal of described pulse compression switch conducting rapidly；
Described pulse compression switch was used for the energy moment of high temperature capacitor unit (202) after it turns on
It is applied to described liquid electric pulse shock wave generation unit (204).
5. de-plugging of well increasing device as claimed in claim 4, it is characterised in that described pulse pressure
Contracting switch is gas switch, Triggered Vacuum Switch or other high voltage solid switch.
6. the de-plugging of well increasing device as described in any one of claim 2-5, it is characterised in that institute
State metal outer cylinder (301), bar electrode that liquid electric pulse shock wave generation unit (204) includes being coaxially disposed
(302), plate electrode (303), insulating fixing piece (304), glued membrane sheath (305) and electric discharge liquid
(306)；
The geometric center of described metal outer cylinder (301) and described plate electrode (303) is with described bar electrode
(302) axis is that axle center is coaxially distributed, and described plate electrode (303) just may be used as negative electrode
It is placed in the bottom inner portion of described metal outer cylinder (301) and is threadably secured, described metal outer cylinder (301),
Described plate electrode (303), described bar electrode (302) are all dipped in described electric discharge liquid (306), described
Electric discharge liquid (306) is sealed by glued membrane sheath (305) and makes it reliably isolate with external environment；
Described bar electrode (302) and described insulating fixing piece (304) are by screw thread compact siro spinning technology；
Described glued membrane sheath (305) for by described metal outer cylinder (301), described bar electrode (302),
Described plate electrode (303) and described insulating fixing piece (304) are strictly enclosed so that described electric discharge liquid
Body (306) is not affected by oil well complex fluid environment.
7. de-plugging of well increasing device as claimed in claim 6, it is characterised in that described plate electrode
(303) and described insulating fixing piece (304) is paraboloid of revolution structure, parabola equation is met
y2=a (x+b)；Wherein, y is the axis of sparking electrode, and x is paraboloidal horizontal axis of symmetry
Line, a, b are constant, and sphere of action and operating distance optimization according to shock wave determine.
8. de-plugging of well increasing device as claimed in claim 7, it is characterised in that in described insulation
The parabola of fixture (304) bottom adds surface breakdown distance, is used for improving electrical insulation strength；
And the horizontal median axis of discharging gap is located exactly at described plate electrode (303) and described insulating fixing piece
(304) in the paraboloidal focus formed.
9. de-plugging of well increasing device as claimed in claim 6, it is characterised in that described glued membrane protects
Set (305) uses resistance to oil corrosion, and operating temperature is higher than 200 DEG C, and the material that percentage elongation is more than 200%.
10. de-plugging of well increasing device as claimed in claim 9, it is characterised in that described glued membrane
The material of sheath (305) is fluorubber or polyethylene film.
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| CN108049852A (en) * | 2017-11-07 | 2018-05-18 | 华中科技大学 | Frscturing device and method based on liquid electric pulse shock wave and chemical agent augmented injection |
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| CN109403937A (en) * | 2018-11-05 | 2019-03-01 | 清华四川能源互联网研究院 | A kind of blast wave generating apparatus of oil/gas well and well production increment method using shock wave |
| CN110107272A (en) * | 2019-03-20 | 2019-08-09 | 南京帕尔斯电气科技有限公司 | A kind of high cumulative electrical pulse blocking removing device and operating method |
| CN110107272B (en) * | 2019-03-20 | 2021-07-09 | 南京帕尔斯电气科技有限公司 | High-energy-gathering electric pulse blockage removing device and operation method |
| CN113473819A (en) * | 2021-07-30 | 2021-10-01 | 武汉华工融军科技有限公司 | Cooling system of liquid-electricity pulse shock wave petroleum yield increasing device |
| CN113914822A (en) * | 2021-09-23 | 2022-01-11 | 武汉华工融军科技有限公司 | Shock wave discharge electrode, shock wave transmitter and unblocking system suitable for unblocking |
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