CN117148422A - High-power underground seismic source - Google Patents
High-power underground seismic source Download PDFInfo
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- CN117148422A CN117148422A CN202210562129.6A CN202210562129A CN117148422A CN 117148422 A CN117148422 A CN 117148422A CN 202210562129 A CN202210562129 A CN 202210562129A CN 117148422 A CN117148422 A CN 117148422A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
- G01V1/04—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
- G01V1/104—Generating seismic energy using explosive charges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/10—Aspects of acoustic signal generation or detection
- G01V2210/12—Signal generation
- G01V2210/121—Active source
- G01V2210/1212—Shot
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/10—Aspects of acoustic signal generation or detection
- G01V2210/12—Signal generation
- G01V2210/129—Source location
- G01V2210/1299—Subsurface, e.g. in borehole or below weathering layer or mud line
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a high-power underground seismic source, which comprises a detonation device, a gun body, a detonating cord, a plurality of perforated bullets and a bullet frame, wherein the detonation device is positioned at the upper end of the high-power underground seismic source and is connected with the gun body so as to detonate the high-power underground seismic source; the inner cavity of the gun body is hollow so as to protect the detonating cord, the plurality of perforated bullets and the bullet frame which are arranged in the gun body; the detonating cord is wound on the outer side of the bullet rack and connected with each perforated bullet for conducting explosion of the plurality of perforated bullets; the plurality of open hole bullets are respectively fixed on the inner side of the bullet frame and are energy sources of the high-power underground seismic source, and vibration waves are provided by excitation and detonation; the bullet frame is positioned in the gun body to fix the plurality of open-pore bullets to be evenly distributed. The high-power underground seismic source solves the defects of weak energy and short propagation distance of the conventional underground seismic source, obtains high-quality underground geophysical data, and realizes three-dimensional geological high-resolution imaging of an object-oriented oil reservoir.
Description
Technical Field
The invention relates to the technical field of geophysics, in particular to a high-power underground seismic source.
Background
The underground geophysical technology comprises an interwell earthquake, a VSP, a reverse VSP and an underground three-dimensional earthquake, and is an effective method for lithology analysis, reservoir description and oilfield development due to the advantages of being closer to a detection target, effectively avoiding a low-speed zone and the like. The development technology is required to solve the problems that the transverse range of a target layer is larger, the resolution ratio in the transverse direction is higher, the energy requirement on a seismic source is larger, the propagation distance is longer, the direct wave is easy to identify, the reflected wave energy is stronger, and the signal-to-noise ratio of data is higher. However, the downhole seismic source is one of the bottlenecks that limit the development of downhole geophysical technology.
The underground seismic sources comprise pulse type seismic sources and controllable type seismic sources, wherein the pulse type seismic sources comprise explosive pulse type seismic sources, underground arc discharge pulse seismic sources, electric spark seismic sources, underground heavy hammer seismic sources, underground air gun seismic sources and drill bit seismic sources. The explosive source has strong downhole environment adaptability when excited, has larger energy when excited, is simple to operate, can work under the conditions of high temperature and high pressure, and easily has damage to the well wall. The controllable seismic source comprises an underground track type controllable seismic source, an underground piezoelectric controllable seismic source, an underground inflatable controllable seismic source, an underground hydraulic controllable seismic source and the like, and has the advantages of low construction cost, safety, environmental protection, flexible construction organization, manual control of excitation signals and the like, but has weaker energy, narrower bandwidth and short propagation distance in stratum.
The seismic source in the well has the characteristics of large energy, small volume, no damage to the well wall, high temperature and high pressure resistance, repeated excitation, easy construction, strong adaptability and the like.
In application number: in the Chinese patent application of CN20090015021. X, a seismic prospecting explosive source by a reverse vertical seismic profile method is related, and the seismic source consists of a safety mechanism body, a piston type detonator seat, a pressure spring, a detonator, a rubber protector, a booster device, a reducer union, a detonating cord device, a shell, a buffer material, a detonating powder column, a main explosive and a centralizer. The safety mechanism body is internally provided with a piston type detonator seat and a rubber protector, the detonator and a pressure spring are arranged in the piston type detonator seat, the lower end of the safety mechanism body is connected with a reducing joint, the lower end of the safety mechanism body is connected with a shell filled with a buffer material, a detonating cord device and an initiating explosive column, and all the connecting parts are sealed by adopting high-temperature resistant sealing parts. The invention adopts a brittle metal shell, a pressed high-density high-temperature resistant explosive is arranged in the brittle metal shell, the explosive amount of the explosive can be increased or decreased and regulated according to the energy requirement of exploration, and the energy of explosion can be transmitted to the ground for receiving through an oil well casing and a well cementation cement sheath.
In application number: in the chinese patent application CN90110093.5, a shallow layer source gun and a source bomb are involved, the source bomb is mounted in the gun chamber of the source gun, and the shell of the source bomb is composed of paper tube, copper base and plug pad. One end of the shell is provided with primer with core rod and powder, the other end is provided with bullet, and the middle is provided with powder. A sealing gasket is arranged between the propellant powder and the gunpowder and between the propellant powder and the bullet. The gun bore of the seismic source gun is fixed on a connecting screw, a trigger is arranged in the connecting screw, an insulating sleeve is arranged between the trigger and the connecting screw, and an end cover is arranged at the end of the gun body. The invention has the advantages of concentrated energy excitation in one direction, high frequency, abundant energy, strong layering capability, good repeatability and additivity, and safety, reliability and flexibility in use.
In application number: in the US patent application of US 146608, it is contemplated that the seismic source device 10 includes a body 12, a cover 22, an actuator 24 and a shuttle 26. The main body 12 includes a main chamber 14 formed therein and adapted to receive compressed air. The actuator 24 is preferably a solenoid actuated valve that can be quickly opened and closed in response to an electrical signal. The seismic source equipment 10 includes a solenoid bore 38 located within the fill channel 34 to enable fluid communication between the fill channel 34 and a solenoid chamber 40. The solenoid valve orifice 38 and solenoid chamber 40 are configured to provide a rapid burst of high pressure air. When the actuator 24 is opened to initiate movement of the shuttle 26, the flow of air from the main fill passage 34 and the main chamber 14 into the actuator 24 is simultaneously restricted by the actuator 24 so that the pressure in the main chamber 14 remains high enough to emit the proper air bubble and does not prevent the shuttle 26 from closing. A spring chamber 44 containing compressed air or mechanical springs provides a closing force bearing on a surface 46 of the shuttle 26. A shut-off chamber 68 is disposed circumferentially between the shuttle 26 and the cover 22 and is adapted to receive a portion of the released air to provide additional closing force on the shuttle 26 as it is launched from the main chamber 14 toward the seismic source equipment 10 during firing. The water seal mechanism 74 prevents ambient fluid from flowing into the shut-off chamber 68 prior to combustion.
The prior art is greatly different from the invention, the technical problem which is needed to be solved by the user cannot be solved, and a novel high-power underground seismic source is invented for the purpose.
Disclosure of Invention
The invention aims to provide a high-power underground seismic source capable of obtaining high-quality underground geophysical data and realizing three-dimensional geological high-resolution imaging of a target oil reservoir.
The aim of the invention can be achieved by the following technical measures: the high-power underground seismic source comprises an initiating device, a gun body, a detonating cord, a plurality of perforated bullets and a bullet frame, wherein the initiating device is positioned at the upper end of the high-power underground seismic source and connected with the gun body so as to initiate the high-power underground seismic source; the inner cavity of the gun body is hollow so as to protect the detonating cord, the plurality of perforated bullets and the bullet frame which are arranged in the gun body; the detonating cord is wound on the outer side of the bullet rack and connected with each perforated bullet for conducting explosion of the plurality of perforated bullets; the plurality of open hole bullets are respectively fixed on the inner side of the bullet frame and are energy sources of the high-power underground seismic source, and vibration waves are provided by excitation and detonation; the bullet frame is positioned in the gun body to fix the plurality of open-pore bullets to be evenly distributed.
The aim of the invention can be achieved by the following technical measures:
the open-pore bomb comprises a shell, a main charge and a shaped charge liner, wherein the shell is positioned outside the open-pore bomb and provides a storage space for the main charge; the main charge is positioned in the shell, and the explosion of the main charge generates energy output; the liner is positioned on the inner side of the shell to restrict the energy output direction of the main charge after explosion.
The shaped charge liner is made of aluminum and is conical in shape.
The open-pore bullet adopts a common open-pore bullet or a high-temperature open-pore bullet according to well temperature conditions.
The detonating cord comprises a coating, a braided wire and a drug core, wherein the coating is positioned on the outer layer of the detonating cord so as to protect the braided wire and the drug core; the braided wire is positioned at the middle layer of the detonating cord to restrict the even distribution of the flux core; the explosive core is positioned on the inner layer of the detonating cord, and the explosive explosion of the explosive core detonates each open-pore bullet.
The detonating cord adopts a detonating cord for the low-shrinkage high-detonation-velocity oil and gas well, and normal-temperature detonating cord or high-temperature detonating cord is selected according to well temperature conditions.
The spring frame is made of ductile metals such as steel, aluminum and copper.
The detonation device adopts an electric energy detonation device.
The initiating device comprises a wire, an aluminum sleeve, a magnetic ring, a bridge wire, an ignition charge, an initiating charge and an explosive, wherein the wire is positioned at the top end of the initiating device and is used for receiving and transmitting electric energy to the bridge wire; the aluminum sleeve is a shell of the detonating device and protects all elements inside; the magnetic ring is positioned between the bridge wire and the aluminum sleeve to isolate the electric energy carried by the bridge wire from being released outwards; the bridge wire is positioned between the lead and the ignition powder, receives the electric energy carried by the lead, and is heated to excite the ignition powder; the ignition powder wraps the tail end of the bridge wire, and the ignition powder is detonated after being ignited by the bridge wire; the initiating explosive is positioned at the top end of the explosive and detonates the explosive after being detonated by the initiating explosive; the explosive is positioned at the tail end of the initiating device, and after being detonated by the initiating device, the explosive is violently exploded to detonate the detonating cord.
Compared with the traditional seismic source, the high-power underground seismic source has the advantages of larger energy of the dosage per unit volume, wider controllable range of the dosage and higher temperature and pressure resistant index. Through tubular column connection and transportation, a plurality of seismic sources can be simultaneously lowered into the well and respectively excited without mutual interference. The cable pulls the instrument in pit and the submerged joint of detonating device, then through the operation of ground instrument excitation, the excitation mode is more reliable and stable, and excitation time, excitation order are controllable, have more advantages.
The high-power underground seismic source solves the defects of weak energy and short propagation distance of the conventional underground seismic source, obtains high-quality underground geophysical data, and realizes three-dimensional geological high-resolution imaging of an object-oriented oil reservoir.
Drawings
FIG. 1 is a block diagram of one embodiment of a high power down hole seismic source of the present invention;
FIG. 2 is a cross-sectional view of an open bomb according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a detonating cord according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of an electrical energy initiating device in an embodiment of the invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, and/or combinations thereof.
The following are several specific examples of the application of the present invention.
Example 1
In a specific embodiment 1 to which the present invention is applied, the high power down hole seismic source of the present invention includes a perforating gun, perforated bullets, detonating cords and a bullet holder, the perforated bullets are fixed on the bullet holder, the detonating cords are connected in series, and the bullet holder is placed inside the perforating gun. Each group of perforating guns is a seismic source, the groups of perforating guns are connected through oil pipes or empty guns, a plurality of seismic sources can be simultaneously lowered into the well, and the distance between the seismic sources can be adjusted according to requirements.
Gun body: the gun head or middle joint, gun tail are connected up and down, and a bullet rack and a perforated bullet are arranged in the gun head or middle joint and gun tail for protecting the perforated bullet, the bullet rack, the detonating cord, the detonator and other parts arranged in the gun head or middle joint from being influenced by complex environments such as underground high pressure, acid, alkali, vibration, impact and the like. Reliable detonation of the initiating explosive devices such as the perforating bullet and the like is guaranteed, and perforating is completed. The gun body has an outer diameter of 45-200 mm, a gun length of 2-5 m, and a perforation density of about 8-25 perforations per meter, and can be selected according to different well structures and different underground depths of a seismic source, and the perforation density of the perforated bullets is adjusted according to energy design requirements. The wall thickness of the preset opening of the gun body is 6-10mm, the integral pressure resistance is not affected, and the vibration source attenuation can be reduced to the greatest extent.
Spring frame: the frame material should have sufficient structural integrity to withstand the explosive forces of the explosive to avoid being cracked or broken during operation. Useful materials are: ductile metals such as steel, aluminum, copper, etc.
Opening bullet: the open-pore bullet consists of a shell, an aluminum-based shaped charge liner, an explosion-propagation medicine and a main charge, wherein the aluminum-based shaped charge liner is conical, and the cone angle is 85-130 degrees. The shaped charge cover of the perforated bomb is divided into an upper part and a lower part, wherein the upper two buses are in a straight line shape, the included angle of the two buses is between 85 and 110 degrees, the lower bus is an arc line, and the angle of the axial conical surface is between 90 and 135 degrees. After the perforated bomb is detonated, the main charge detonates and crushes the shaped charge cover to form high-temperature high-pressure high-speed jet penetrating perforating gun body, but because of the structural design, the energy decays quickly, no longer continues to apply work to penetrate the sleeve, the energy is exhausted in the well liquid and the sleeve, and vibration generated by perforation is transmitted to the ground through stratum, the sleeve and the well liquid respectively and is received by a ground acquisition system, so that the effect of a seismic source in the well is achieved. The open-pore bullets can be classified into common open-pore bullets and high-temperature open-pore bullets according to temperature resistance indexes, and can be selected according to well temperature conditions.
Detonating cord: the detonating cord is composed of a explosive core, a braided wire and a coating, the detonating velocity is 8000-12000m/s, and the detonating cord is divided into normal temperature detonating cord and high temperature detonating cord according to temperature resistance index, and can be selected according to well temperature conditions.
Source excitation: the source excitation is classified into impact type, pressure type and electric energy type.
Example 2
In a specific embodiment 2 to which the present invention is applied, in order to achieve stable and reliable detonation of a downhole seismic source, the present invention mainly uses electric energy to excite the seismic source.
The electric energy excitation source can be divided into two types of electric energy rod excitation and cable traction horse faucet excitation:
(1) Excitation of an electric energy rod: the upper end of each group of the seismic sources is connected with a set of electric energy detonating device, the excitation of the top-level seismic sources can be divided into throwing electric energy rods and pumping electric energy rods, the throwing electric energy rods are suitable for underground seismic source excitation in wells with well inclination smaller than 45 degrees, the pumping electric energy rods are suitable for underground seismic source excitation in wells with well inclination larger than 45 degrees, after the top-level seismic sources are excited, the tail electric energy delay detonating device is started to excite secondary seismic sources, and the secondary seismic sources are sequentially circulated to excite multiple groups of seismic sources one by one.
(2) Cable traction horse tap excitation: the cable traction horse tap excites a seismic source in the well, and two types of cable traction horse tap butt joint and pumping horse tap butt joint can be adopted according to well condition. In a well with well deviation smaller than 45 degrees, a cable directly pulls a cock, conveys a seismic source to reach a target position, and then detonates through ground instrument operation to excite the seismic source in the well; in wells with well deviation greater than 45 degrees, the cable pulls the horse-head through the vertical well section, the ground is pumped by water flow before entering the highly-inclined section or the horizontal section, the underground horse-head and the underground seismic source are pushed to reach the target position, and then detonation is carried out through a ground instrument, so that the underground seismic source is excited. Under the condition, in order to ensure the exertion of the energy of the seismic source to a greater extent and reduce the damage to the sleeve, the righting and current limiting devices are additionally arranged on the nylon and the gun body. In addition, the excitation mode is not suitable for the condition that a plurality of groups of seismic sources are simultaneously lowered into the well, and only a single seismic source can be lowered into the well in sequence for cyclic construction.
In order to realize the simultaneous descending of a plurality of seismic sources into a well, the targets are respectively excited without mutual interference, the excitation mode is stable and reliable, the excitation time and the excitation sequence are controllable, the respective advantages of the two modes of electric energy excitation are combined, a plurality of groups of seismic sources are connected and conveyed into the well through a pipe column, after the seismic sources reach a target layer, a cable traction underground instrument is in submerged connection with an initiating device, and then the underground instrument is excited through the operation of a ground instrument.
Example 3
In a specific embodiment 3 to which the present invention is applied, as shown in fig. 1, fig. 1 is a block diagram of a high power down hole seismic source according to the present invention. The high-power underground seismic source comprises an initiating device 11, a gun body 12, a detonating cord 13, an open hole bullet 14 and a bullet frame 15. The detonation device 11 is positioned at the upper end of the seismic source in the well, connected with the gun body 12 through threads and used for detonating the seismic source; the inner cavity of the gun body 12 is hollow, and is internally provided with a detonating cord 13, an open-pore bullet 14 and a bullet frame 15, and is fixedly connected with the bullet frame 15 through jackscrews, so as to protect the detonating cord 13, the open-pore bullet 14 and the bullet frame 15 from being damaged by friction and impact in the process of going into a well; the detonating cord 13 is wound on the outer side of the bullet rack 15 and connected with each perforated bullet 14 for explosion propagation of the perforated bullet 14; the open hole bullet 14 is fixed on the inner side of the bullet frame 15 and is an energy source of a seismic source in a well, and vibration waves are provided by excitation and detonation; the bullet rack 15 is located in the gun body 12 and is used for fixing the perforated bullets 14 to be evenly distributed.
Fig. 2 is a cross-sectional view of the open-cell bomb 14 of fig. 1, including a housing 21, explosive 22, and liner 23. The shell 21 is positioned outside the open-pore bomb and provides storage space for the explosive 22; explosive charges 22 are located within the housing 21 and are the core energy source for the seismic source in the well, the explosion of which produces an energy output; liner 23 is positioned inside housing 21 to constrain the direction of energy output after detonation of explosive 22.
Fig. 3 is a cross-sectional view of the detonating cord 13 of fig. 1, including a coating 31, braided wire 32 and a drug core 33. The coating 31 is positioned on the outer layer of the detonating cord and is used for protecting the braided wire 32 and the drug core 33; the braided wire 32 is positioned in the middle layer of the detonating cord and used for restraining the uniform distribution of the drug core 33; the core 33 is positioned in the inner layer of the detonating cord and the explosion propagates each open cell bomb.
Fig. 4 is a cross-sectional view of the electrical energy initiating device 11 of fig. 1, including a wire 41, an aluminum sleeve 42, a magnetic ring 43, a bridge wire 44, an ignition charge 45, an initiating charge 46, and an explosive 47. The wire 41 is located at the top of the electrical energy initiating device, which receives and conducts electrical energy to the bridging wire 44; the aluminum sleeve 42 is the outer shell of the electric energy detonating device, protecting the internal components; the magnetic ring 43 is positioned between the bridge wire 44 and the aluminum sleeve 42, and the electric energy carried by the bridge wire 44 is isolated from being released outwards; the bridging wire 44 is located between the wire 41 and the ignition powder 45, and receives the electric energy carried by the wire 41, and the ignition powder 45 is excited by heating; the ignition charge 45 wraps the end of the bridgewire 44 and detonates the initiating charge 46 after being ignited by the bridgewire 44; the initiating explosive 46 is located at the top end of the explosive 47 and detonates the explosive 47 after being detonated by the initiating explosive 45; the explosive 47 is located at the end of the electrical energy initiating device and, after being detonated by the initiating explosive 46, violently explodes, propagating the lower initiating explosive device, i.e. the detonating cord 13.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but although the present invention has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solution described in the foregoing embodiment, or equivalents may be substituted for some of the technical features thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Other than the technical features described in the specification, all are known to those skilled in the art.
Claims (9)
1. The high-power underground seismic source is characterized by comprising an initiating device, a gun body, a detonating cord, a plurality of perforated bullets and a bullet frame, wherein the initiating device is positioned at the upper end of the high-power underground seismic source and is connected with the gun body so as to initiate the high-power underground seismic source; the inner cavity of the gun body is hollow so as to protect the detonating cord, the plurality of perforated bullets and the bullet frame which are arranged in the gun body; the detonating cord is wound on the outer side of the bullet rack and connected with each perforated bullet for conducting explosion of the plurality of perforated bullets; the plurality of open hole bullets are respectively fixed on the inner side of the bullet frame and are energy sources of the high-power underground seismic source, and vibration waves are provided by excitation and detonation; the bullet frame is positioned in the gun body to fix the plurality of open-pore bullets to be evenly distributed.
2. The high power down-hole seismic source of claim 1, wherein the open hole bullet comprises a housing, a main charge, and a liner, the housing being positioned outside the open hole bullet to provide storage space for the main charge; the main charge is positioned in the shell, and the explosion of the main charge generates energy output; the liner is positioned on the inner side of the shell to restrict the energy output direction of the main charge after explosion.
3. The high power down-hole seismic source of claim 2, wherein the liner is made of aluminum and is tapered in shape.
4. The high power downhole seismic source of claim 1, wherein the open-hole bomb is a conventional open-hole bomb or a high temperature open-hole bomb depending on well temperature conditions.
5. The high power down-hole seismic source of claim 1, wherein the detonating cord comprises a coating, braided wire and a core, the coating being located on an outer layer of the detonating cord to protect the braided wire and the core; the braided wire is positioned at the middle layer of the detonating cord to restrict the even distribution of the flux core; the explosive core is positioned on the inner layer of the detonating cord, and the explosive explosion of the explosive core detonates each open-pore bullet.
6. The high-power underground seismic source according to claim 1, wherein the detonating cord is a detonating cord for a low-shrinkage high-detonation-velocity oil-gas well, and the detonating cord is a normal-temperature detonating cord or a high-temperature detonating cord according to well temperature conditions.
7. The high power down-hole seismic source of claim 1, wherein the spring holder is made of ductile metals such as steel, aluminum, and copper.
8. The high power downhole seismic source of claim 1, wherein the initiation device is an electrical energy initiation device.
9. The high power downhole seismic source of claim 8, wherein the initiation device comprises a wire, an aluminum sleeve, a magnetic ring, a bridge wire, an ignition charge, an initiating charge, and an explosive charge, the wire being positioned at a top end of the initiation device that receives and conducts electrical energy to the bridge wire; the aluminum sleeve is a shell of the detonating device and protects all elements inside; the magnetic ring is positioned between the bridge wire and the aluminum sleeve to isolate the electric energy carried by the bridge wire from being released outwards; the bridge wire is positioned between the lead and the ignition powder, receives the electric energy carried by the lead, and is heated to excite the ignition powder; the ignition powder wraps the tail end of the bridge wire, and the ignition powder is detonated after being ignited by the bridge wire; the initiating explosive is positioned at the top end of the explosive and detonates the explosive after being detonated by the initiating explosive; the explosive is positioned at the tail end of the initiating device, and after being detonated by the initiating device, the explosive is violently exploded to detonate the detonating cord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210562129.6A CN117148422A (en) | 2022-05-23 | 2022-05-23 | High-power underground seismic source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210562129.6A CN117148422A (en) | 2022-05-23 | 2022-05-23 | High-power underground seismic source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117148422A true CN117148422A (en) | 2023-12-01 |
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ID=88885388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210562129.6A Pending CN117148422A (en) | 2022-05-23 | 2022-05-23 | High-power underground seismic source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117148422A (en) |
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2022
- 2022-05-23 CN CN202210562129.6A patent/CN117148422A/en active Pending
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