CN113363098A - Self-extinguishing arc discharge switch structure for underground operation - Google Patents
Self-extinguishing arc discharge switch structure for underground operation Download PDFInfo
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- CN113363098A CN113363098A CN202110337633.1A CN202110337633A CN113363098A CN 113363098 A CN113363098 A CN 113363098A CN 202110337633 A CN202110337633 A CN 202110337633A CN 113363098 A CN113363098 A CN 113363098A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
Abstract
A self-extinguishing arc discharge switch structure for downhole operations, comprising: an upper end electrode part, a lower end electrode part and an insulation arc quenching part; the upper end electrode part comprises an upper wiring end, an upper end electrode, a fixing nut, a set screw and a set nut. The lower electrode part comprises a lower wiring end, a lower electrode, a fixing nut, a set screw and a set nut. The insulating layer comprises an upper end insulating layer, a middle insulating layer, a lower end insulating layer and a C-shaped electromagnet. Through the structure, the device can ensure good sealing property and insulating property underground. The pulse discharge switch electrode material adopts tungsten-copper alloy, and has strong anti-corrosion capability. The discharge switch electrode gap is adjustable by utilizing the fixing nut and the fastening nut, so that the discharge voltage grade of the device is adjustable. A magnetic field is formed in a discharge area of the C-shaped electromagnet, electric arcs are easy to extinguish after being bent under the action of the magnetic field, the insulating recovery capacity between electrodes is enhanced, and meanwhile the service life of the switch electrode is prolonged.
Description
Technical Field
The invention belongs to the field of unconventional shale oil gas and pulse power, and particularly relates to a self-extinguishing arc discharge switch structure for underground operation.
Background
Shale oil and gas in China have the problems of complex geological conditions, deep burial depth, old stratum generation, deficient water resources and a lot of problems in shale oil and gas development. However, shale oil and gas resources in China are quite rich, the shale gas reserves reach 36.1 billion cubic meters, the first place in the world, the shale oil can be exploited by 50 billion tons, and the third place in the world is just behind Russia and the United states. With the progress of the technology, the development prospect of the shale oil gas in China is very wide.
In unconventional oil and gas development, a pulse power technology is utilized, high-pressure pulses with the same frequency as the natural frequency of a target reservoir are continuously applied to the target reservoir, and the target reservoir can enter a resonance state, so that the porosity of the reservoir is greatly improved, the development of reservoir fractures is promoted, the permeability is improved, and the aims of stable production and yield increase of shale oil and gas are fulfilled.
The shale oil and gas wells at home and abroad are usually provided with the discharge switches with nonadjustable electrodes when pulse power operation is carried out, the gaps of the discharge switches used in the method are fixed, the discharge voltage grade is nonadjustable, and proper discharge voltage cannot be selected according to different stratum characteristics. If the discharge voltage is changed, the discharge switch needs to be replaced, and the operation is complex. The discharge switch can adjust the discharge voltage level, can effectively act on a target reservoir stratum, causes reservoir stratum resonance, and reduces unnecessary energy loss.
In unconventional oil and gas development, a high-frequency high-voltage strong pulse is required to be used for continuously acting on a target reservoir for a long time, and the requirement on an electrode in a discharge switch is extremely high. The electrode material adopted by the discharge switch is tungsten-copper alloy, and the discharge switch has high hardness and strong anti-corrosion capability. The discharge switch electrode adopts an adjustable structure, so that the arc quenching capability is enhanced while the electrode loss is reduced to the maximum extent, and the service life of the electrode is prolonged.
In the underground construction operation, the equipment is required to have extremely high insulating and sealing performance. The pulse discharge switch adopts a three-layer insulation structure made of polytetrafluoroethylene materials, and in order to prevent discharge of a discharge switch electrode and an outer wall, a set screw made of polytetrafluoroethylene materials is adopted, so that the insulation is enhanced, the compression-resistant sealing performance is high, and the pulse discharge switch is suitable for various unconventional oil and gas well depths.
The invention relates to a self-extinguishing arc discharge switch structure for underground operation, which can ensure that the device has good sealing property and insulating property under the underground high-pressure condition. The pulse discharge switch electrode is made of high-electric-corrosion-resistance tungsten-copper alloy materials, and the gap of the switch electrode is adjustable by utilizing the fastening nut, so that the normal work of equipment is ensured, the energy loss is reduced to the maximum extent, and the service life of the discharge switch is prolonged.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the self-extinguishing arc discharge switch structure for underground operation is provided. The discharge voltage level of the high-voltage discharge switch is adjustable, electric arcs can be automatically extinguished, the insulation sealing performance is good, the high-voltage discharge switch can continuously work under the conditions of high dimensional voltage and high frequency, the energy loss is reduced to the maximum extent, and the service life of the discharge switch is prolonged.
The above object of the present disclosure is achieved by the following technical solutions:
a shale oil and gas well operation pulse discharge switch structure includes: an upper end electrode part, a lower end electrode part and an insulation arc quenching part; wherein the content of the first and second substances,
the upper end electrode part comprises an upper wiring end, an upper end electrode, a set screw and a set nut,
the upper electrode is adjusted in height through threads and fixed through a fastening nut,
the upper terminal is fixedly connected with the upper electrode,
the fixing nut is fixed by a set screw,
the upper end electrode is connected with the fixed nut through threads;
the lower end electrode part comprises a lower wiring end, a lower end electrode, a fixing nut, a set screw and a set nut,
the height of the lower electrode is adjusted through threads and is fixed through a fastening nut,
the lower terminal is fixedly connected with the lower electrode,
the fixing nut is fixed by a set screw,
the lower end electrode is connected with the fixed nut through threads;
the insulation arc-quenching part comprises an upper end insulation layer, a middle insulation layer, a lower end insulation layer and a C-shaped electromagnet,
the C-shaped electromagnet is arranged in the middle insulating layer,
the upper end insulating layer is connected with the middle insulating layer through threads,
the middle insulating layer of the upper end insulating layer is connected with the lower end insulating layer through threads;
preferably, the upper end electrode and the lower end electrode are made of tungsten-copper alloy.
Preferably, the gap between the adjustable electrode and the fixed electrode is 0.5-1.5 mm.
Preferably, the insulating layer is made of polytetrafluoroethylene.
Preferably, the upper end electrode and the lower end electrode fastening screw are made of stainless steel materials.
Preferably, the C-shaped electromagnet core is made of silicon steel materials.
Compared with the prior art, the beneficial effect that this disclosure brought does:
the discharge switch electrode material adopted by the invention is tungsten-copper alloy, and has high hardness and strong anti-corrosion capability. The electrode adopts adjustable structure, and the discharge voltage grade is adjustable, increases the life of switch. The insulating layer is made of polytetrafluoroethylene, and is of a three-layer structure, so that the voltage resistance level is high, and the insulating property is good. The electrified lead adopts a high-temperature-resistant copper lead, so that the electric conductivity is good and the durability is high.
The self-extinguishing arc discharge switch structure for underground operation provided by the invention can effectively overcome the defects of the traditional discharge switch, has good insulation recovery performance, improves the upper limit of pulse discharge frequency, reduces the loss of electrodes and prolongs the service life of the switch. The method can induce reservoir resonance by selecting different voltage levels for different target reservoirs, reduce unnecessary energy loss, greatly improve the porosity of the reservoir, promote the development of reservoir fractures, improve the permeability and achieve the aims of stable production and yield increase of shale oil gas.
Drawings
Fig. 1 is a block diagram of a downhole operated self-extinguishing discharge switch according to the present invention.
The reference numerals are explained below:
1-1, an upper terminal; 1-2, tightening a nut; 1-3, tightening a screw; 1-4, fixing a nut; 1-5, upper electrode; 2-1, a lower terminal; 2-2, tightening a nut; 2-3, tightening a screw; 2-4, fixing a nut; 2-5, lower end electrode; 3-1, an upper end insulating layer; 3-2, a middle insulating layer; 3-3, a lower end insulating layer; 3-4, C type electromagnet.
Fig. 2 is a C-shaped electromagnet in the structure of a self-extinguishing arc discharge switch for downhole operation.
The reference numerals are explained below:
4-1, electrifying a lead; 4-2 and an iron core.
Detailed Description
As shown in fig. 1, the present invention provides a self-extinguishing arc discharge switch structure for downhole operation, comprising: an upper end electrode part, a lower end electrode part and an insulation arc quenching part; wherein the content of the first and second substances,
the upper end electrode part comprises an upper wiring terminal 1-1, a set nut 1-2, a set screw 1-3, a fixed nut 1-4 and an upper end electrode 1-5,
the upper terminal 1-1 is fixedly connected with the upper electrode 1-5,
the upper end electrode 1-5 is adjusted in height through threads and is fixed with the fixing nut 1-4 through the fixing nut 1-2 and the fixing screw 1-3;
the adjustable electrode part comprises a lower wiring terminal 2-1, a set nut 2-2, a set screw 2-3, a fixed nut 2-4 and a lower electrode 2-5,
the lower terminal 2-1 is fixedly connected with the lower electrode 2-5,
the height of the lower electrode 2-5 is adjusted through threads, and the lower electrode is fixed with a fixing nut 2-4 through a fixing nut 2-2 and a fixing screw 2-3;
the insulating layer comprises an upper end insulating layer 3-1, a middle insulating layer 3-2, a lower end insulating layer 3-3 and a C-shaped electromagnet 3-4;
as shown in fig. 2, the C-shaped electromagnet includes a power-on wire 4-1 and an iron core 4-2;
the electrified lead 4-1 is wound and connected with the iron core 4-2;
preferably, the upper end electrode and the lower end electrode of the discharge switch are made of tungsten-copper alloy.
Preferably, the gap between the adjustable upper electrode and the lower electrode is 0.5-1.5 mm.
Preferably, the insulating layer is made of polytetrafluoroethylene.
Preferably, the upper end electrode and the lower end electrode fastening screw are made of stainless steel materials.
Preferably, the C-shaped electromagnet core is made of silicon steel materials.
The discharge switch electrode material adopted by the invention is tungsten-copper alloy, and has high hardness and strong anti-corrosion capability. The electrode adopts adjustable structure, and the discharge voltage grade is adjustable, increases the life of switch. The insulating layer is made of polytetrafluoroethylene, and is of a three-layer structure, so that the voltage resistance level is high, and the insulating property is good. The iron core of the electromagnet is made of silicon steel materials, so that the electromagnet is easier to magnetize and demagnetize quickly, and has good control performance.
The self-extinguishing arc discharge switch structure for underground operation provided by the invention can effectively overcome the defects of the traditional discharge switch, has good insulation recovery performance, improves the upper limit of pulse discharge frequency, reduces the loss of electrodes and prolongs the service life of the switch. The method can induce reservoir resonance by selecting different voltage levels for different target reservoirs, reduce unnecessary energy loss, greatly improve the porosity of the reservoir, promote the development of reservoir fractures, improve the permeability and achieve the aims of stable production and yield increase of shale oil gas.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the present invention without departing from the technical spirit of the present invention.
Claims (4)
1. A self-extinguishing arc discharge switch structure for downhole operation is characterized by comprising the following structures: an upper end electrode part, a lower end electrode part and an insulation arc quenching part; the upper end electrode part comprises an upper wiring end, an upper end electrode, a set screw and a set nut; the lower end electrode part comprises a lower wiring end, a lower end electrode, a fixing nut, a set screw and a set nut; the insulating layer comprises an upper end insulating layer, a middle insulating layer, a lower end insulating layer and a C-shaped electromagnet.
2. The structure of a self-extinguishing arc discharge switch for downhole operations as claimed in claim 1, wherein the upper and lower electrodes are made of a high hardness and high corrosion resistance tungsten-copper alloy.
3. The structure of a self-extinguishing arc discharge switch for downhole operations as claimed in claim 1, wherein the upper electrode and the lower electrode are adjustable in gap distance by means of a tightening nut.
4. A self-extinguishing discharge switch structure for downhole operation according to claim 1, wherein the arc extinguishing capability of the insulation arc extinguishing portion can be adjusted by other circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337633.1A CN113363098A (en) | 2021-03-30 | 2021-03-30 | Self-extinguishing arc discharge switch structure for underground operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337633.1A CN113363098A (en) | 2021-03-30 | 2021-03-30 | Self-extinguishing arc discharge switch structure for underground operation |
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| CN113363098A true CN113363098A (en) | 2021-09-07 |
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| CN202110337633.1A Pending CN113363098A (en) | 2021-03-30 | 2021-03-30 | Self-extinguishing arc discharge switch structure for underground operation |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001118450A (en) * | 1999-10-14 | 2001-04-27 | Matsushita Electric Works Ltd | Contact device |
| US20100157501A1 (en) * | 2008-12-18 | 2010-06-24 | Tdk Corporation | ESD protection device and composite electronic component of the same |
| JP2010177164A (en) * | 2009-02-02 | 2010-08-12 | Toyota Motor Corp | Extinguishing device |
| US20120200376A1 (en) * | 2011-02-08 | 2012-08-09 | Lsis Co., Ltd | Vacuum interrupter for vacuum circuit breaker |
| CN104903985A (en) * | 2012-12-05 | 2015-09-09 | 西门子公司 | Switching device |
| CN209056432U (en) * | 2018-11-23 | 2019-07-02 | 上海为鹏科技有限公司 | A kind of high power DC electric switch |
| CN110821432A (en) * | 2019-10-24 | 2020-02-21 | 中国石油大学(华东) | Pulse discharge switch structure for downhole operation |
-
2021
- 2021-03-30 CN CN202110337633.1A patent/CN113363098A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001118450A (en) * | 1999-10-14 | 2001-04-27 | Matsushita Electric Works Ltd | Contact device |
| US20100157501A1 (en) * | 2008-12-18 | 2010-06-24 | Tdk Corporation | ESD protection device and composite electronic component of the same |
| JP2010177164A (en) * | 2009-02-02 | 2010-08-12 | Toyota Motor Corp | Extinguishing device |
| US20120200376A1 (en) * | 2011-02-08 | 2012-08-09 | Lsis Co., Ltd | Vacuum interrupter for vacuum circuit breaker |
| CN104903985A (en) * | 2012-12-05 | 2015-09-09 | 西门子公司 | Switching device |
| CN209056432U (en) * | 2018-11-23 | 2019-07-02 | 上海为鹏科技有限公司 | A kind of high power DC electric switch |
| CN110821432A (en) * | 2019-10-24 | 2020-02-21 | 中国石油大学(华东) | Pulse discharge switch structure for downhole operation |
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Application publication date: 20210907 |
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