A kind of special guide tube device of air explosion source can directional excitation direction

Abstract

The application relates to a guide pipe device capable of directional excitation direction for air explosion sources, and relates to the field of seismic wave excitation equipment. The device comprises a sealed shell, a mass block is horizontally arranged in the interior of the sealed shell, the mass block divides the interior of the sealed shell into an explosion chamber located above the mass block and a guide chamber located at the lower part of the mass block, an initiation assembly is arranged in the explosion chamber, a first weak structure is arranged on the side wall of the mass block, a second weak structure is arranged at the bottom of the sealed shell, and the projection of the first weak structure along the height direction falls in the second weak structure. The application has the effect of maximally reducing transverse damage during air explosion source excitation and improving the longitudinal wave excitation energy and transmission capacity of the air explosion source.

Description

Technical Field

[0001] This application relates to the field of seismic wave excitation equipment, and in particular to a guide tube device for a gas explosion source that can direct the excitation direction. Background Technology

[0002] Seismic exploration carries a wealth of information about the Earth's internal structure. It is widely used in shallow geological structures and mineral resource exploration; currently, over 80% of the world's oil and gas resources are discovered using methods that generate seismic waves from artificial sources.

[0003] To obtain high-quality seismic records, seismic exploration often employs explosive seismic sources. Domestic oil and gas field exploration uses millions of detonators and tens of thousands of tons of explosives annually. The use of explosive seismic sources carries extremely high safety risks and incurs significant additional safety management costs. National regulations mandate the use of digital detonators. Furthermore, the polluting gases generated after explosive seismic activation pose a threat to the environment.

[0004] Regarding the aforementioned technologies, the inventors believe that a large amount of lateral damage is generated when the gas explosion source detonates. Utility Model Content

[0005] In order to minimize lateral damage during the excitation of a gas explosion source and improve the longitudinal wave excitation energy and transmission capability of the gas explosion source, this application provides a guide tube device for a gas explosion source that can direct the excitation direction.

[0006] This application provides a guide tube device for a gas explosion vibration source, capable of directional excitation, which adopts the following technical solution:

[0007] A guide tube device for directional excitation of a gas explosion source includes a sealed outer shell. A mass block is horizontally disposed inside the sealed outer shell, dividing the interior of the sealed outer shell into an explosion chamber located above the mass block and a guide chamber located below the mass block. An initiation component is disposed in the explosion chamber. A first weak structure is disposed on the side wall of the mass block, and a second weak structure is disposed on the bottom of the sealed outer shell. The projection of the first weak structure along the height direction falls within the second weak structure.

[0008] Optionally, the detonation assembly includes an ignition head located inside the explosion chamber, the tip of which extends from the top of the sealed housing.

[0009] Optionally, an air inlet pipe is provided at the top of the sealed outer shell, the outlet end of the air inlet pipe is connected to the explosion chamber, and a one-way valve is provided at the inlet end of the air inlet pipe to control the entry of external gas into the air inlet pipe.

[0010] Optionally, the first weak structure includes a first groove formed on the mass block. The first groove is annular and coaxially arranged with the mass block. The depth of the first groove is less than the height of the mass block.

[0011] Optionally, the first groove includes a first upper groove portion opened on the top of the mass block and a first lower groove portion opened on the bottom of the mass block, with a gap between the first upper groove portion and the first lower groove portion.

[0012] Optionally, the second weak structure includes a second groove formed at the bottom of the sealing housing, the groove depth being less than the bottom wall thickness of the sealing housing, and the top of the second groove being spaced apart from the bottom inner wall of the sealing housing.

[0013] Optionally, the diameter of the second groove is not less than the diameter of the first groove.

[0014] Optionally, the sidewall thickness T of the sealing shell and the thickness t of the bottom wall of the sealing shell at the location where the second groove is formed conform to the following formula: T:t = 2~4:1.

[0015] Optionally, the sealed outer shell includes an intermediate tube opposite to the explosion chamber and a guide tube opposite to the guide chamber. A top cover is fixedly connected to the top end of the intermediate tube, and a plug is fixedly connected to the bottom end of the guide tube. The top cover, the intermediate tube, the guide tube, and the plug form a closed chamber.

[0016] Optionally, the mass block is located at the connection point between the intermediate tube and the guide tube.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. Combustible gas and oxygen are unidirectionally introduced into the gas chamber through a gas pipe, with a one-way valve ensuring no gas leakage. When a longitudinal wave source needs to be activated, a gas explosion device is first buried at a certain depth, perpendicular to the horizontal plane. The ignition head extends from the top cover, receives high-voltage electrical energy, and generates an electric spark, causing the mixed gas to undergo laminar combustion and detonation. The intermediate chamber is where the gas is sealed. The ignition head receives high-voltage electrical energy, generates an electric spark, and causes the mixed gas to undergo laminar combustion and detonation. The mass block has double-sided slots, forming weak points. During activation, the mass block detaches, passes through the guide pipe, and strikes the bottom of the wellbore vertically. The plug is located at the bottom of the gas chamber, making the gas chamber a sealed device, and has a weak structure to ensure that only the plug is blown open by the airflow, forming a longitudinal wave in the buried medium. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the overall structure of a guide tube device for directional excitation of a gas explosion source, as described in an embodiment of this application.

[0020] Figure 2 This is a cross-sectional view of a guide tube device for directional excitation of a gas explosion source, as described in an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the sealed outer shell of a guide tube device for a directional excitation direction of a gas explosion source, as described in an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Sealed outer shell; 11. Intermediate tube; 12. Guide tube; 13. Top cover; 14. Plug; 15. Second weak structure; 151. Second groove; 2. Mass block; 21. First weak structure; 211. First groove; 3. Explosion chamber; 4. Guide chamber; 5. Air inlet pipe; 6. Detonation assembly. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0025] Seismic exploration carries a wealth of information about the Earth's internal structure. It is widely used in shallow geological structures and mineral resource exploration; currently, over 80% of the world's oil and gas resources are discovered using methods that generate seismic waves from artificial sources.

[0026] To obtain high-quality seismic records, seismic exploration often employs explosive seismic sources. Domestic oil and gas field exploration uses millions of detonators and tens of thousands of tons of explosives annually. The use of explosive seismic sources carries extremely high safety risks and incurs significant additional safety management costs. National regulations mandate the use of digital detonators. Furthermore, the polluting gases generated after explosive seismic activation pose a threat to the environment.

[0027] Regarding the aforementioned technologies, the inventors believe that a large amount of lateral damage is generated when the gas explosion source detonates.

[0028] In order to minimize lateral damage during the excitation of a gas explosion source and improve the longitudinal wave excitation energy and transmission capability of the gas explosion source, this application provides a guide tube device for a gas explosion source that can direct the excitation direction.

[0029] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0030] This application discloses a guide tube device for a gas explosion vibration source, capable of directional excitation. (Refer to...) Figure 1 , Figure 2 A directional excitation guide tube device for a gas explosion vibration source includes a sealed outer shell 1, which is a hollow cylindrical structure. The sealed outer shell 1 includes a central tube 11, and a guide tube 12 is coaxially arranged below the central tube 11. The guide tube 12 is fixedly connected to the central tube 11, and the interior of the guide tube 12 is in relative communication with the interior of the central tube 11. A top cover 13 is fixedly connected to the top of the central tube 11, completely sealing the top of the central tube 11. A plug 14 is fixedly connected to the bottom of the guide tube 12, completely sealing the interior of the guide tube 12. The top cover 13, the central tube 11, the guide tube 12, and the plug 14 together form a completely sealed chamber within the sealed outer shell 1.

[0031] A mass block 2 is installed at the internal connection point between the intermediate tube 11 and the guide tube 12. The outer wall of the mass block 2 is fixedly connected to the inner wall of the sealing shell 1. A gap is left between the top wall of the mass block 2 and the bottom wall of the upper cover 13 to form an explosion chamber 3, and a gap is left between the bottom wall of the mass block 2 and the top wall of the plug 14 to form a guide chamber 4. The explosion chamber 3 and the guide chamber 4 are separated by the mass block 2. The explosion chamber 3 is opposite to the upper intermediate tube 11, and the guide chamber 4 is opposite to the lower guide tube 12.

[0032] Reference Figure 2 , Figure 3 The guide chamber 4 is filled with compressed gas formed by a mixture of combustible gas and oxygen. This compressed gas is injected through an intake assembly located on the upper cover 13. The intake assembly includes an intake pipe 5, with its intake end located above the upper cover 13 and its outlet end located inside the explosion chamber 3. The intake pipe 5 connects the outside world to the interior of the explosion chamber 3. A one-way valve is also installed at the intake end of the intake pipe 5. This one-way valve controls the gas flow direction, ensuring that the gas inside the intake pipe 5 flows only in one direction, reducing the possibility of compressed gas leaking out of the explosion chamber 3.

[0033] An initiation assembly 6 is also installed inside the explosion chamber 3. The initiation assembly 6 is used to control the explosion inside the explosion chamber 3. The initiation assembly 6 includes an ignition head. The ignition end of the ignition head is located inside the explosion chamber 3, and the top of the ignition head passes through the interior from above. The ignition head is used to receive high-voltage electrical energy and form an electric spark at the ignition end of the ignition head to initiate the explosion of the compressed gas inside the explosion chamber 3.

[0034] The top cover 13 has a connector positioned relative to the air intake pipe 5 and the ignition head. The connector is the mounting component for the air pipe and the ignition head. A seal is provided at the connector and connection point to ensure that there is no air leakage at the connector.

[0035] The sidewall of the mass block 2 is provided with a first weak structure 21, and the bottom cover 14 is provided with a second weak structure 15. The first weak structure 21 is used so that when the ignition head ignites the interior of the explosion chamber 3, the impact generated by the explosion inside the explosion chamber 3 can be separated from the sealing shell 1 through the first weak structure 21, causing the mass block 2 to move toward the side away from the explosion chamber 3, and then impact the cover 14 through the guide chamber 4. The cover 14 is separated from the sealing shell 1 through the second weak structure 15, and the mass block 2 and the impact generated by the explosion are directionally excited to the outside, and the excitation is directed toward the axis of the sealing shell 1, thereby minimizing the lateral damage during the excitation of the gas explosion source and improving the longitudinal wave excitation energy and transmission capability of the gas explosion source.

[0036] The first weak structure 21 includes a first groove 211 formed on the mass block 2. The groove depth of the first groove 211 is less than the thickness of the mass block 2, thereby preventing the explosion chamber 3 located above the mass block 2 and the guide chamber 4 located below the mass block 2 from being connected relative to each other.

[0037] In some embodiments, the first groove 211 is an annular structure, and the first groove 211 is coaxially arranged with the mass block 2. The first groove 211 is formed on the top wall or bottom wall of the mass block 2.

[0038] In some other embodiments, the first groove 211 is an annular structure and is coaxially arranged with the mass block 2. The first groove 211 includes a first upper groove portion formed on the top wall of the mass block 2 and a first lower groove portion formed on the bottom wall of the mass block 2. A gap is left between the bottom of the first upper groove portion and the bottom of the first lower groove portion, so that the sum of the groove depth of the first upper groove portion and the groove depth of the first lower groove portion is less than the thickness of the mass block 2.

[0039] The second weak structure 15 includes a second groove 151, which is formed on the bottom wall of the plug 14, and the depth of the second groove 151 is less than the thickness of the plug 14. In some embodiments, the second groove 151 is an annular structure and is coaxially arranged with the plug 14. The diameter of the second groove 151 is not less than the diameter of the first groove 211, so that after an explosion, the mass block 2 can pass through the position of the plug 14.

[0040] In some embodiments, the thickness of the sidewall of the sealing housing 1 is greater than the thickness of the plug 14, and the thickness of the sidewall of the sealing housing 1 is greater than the thickness of the plug 14 relative to the second groove 151. Furthermore, the thickness T of the sidewall of the sealing housing 1 and the thickness t of the plug 14 relative to the second groove 151 satisfy the following ratio: T:t = 2 to 4:1. In a specific embodiment, the thickness T of the sidewall of the sealing housing 1 and the thickness t of the plug 14 relative to the second groove 151 satisfy the following ratio: T:t = 3:1.

[0041] Taking into account pressure resistance and the possibility of directional excitation, the gas chamber of the gas explosion source is preferably made of steel and fabricated by welding. The longitudinal wave excitation chamber consists of an upper cover 13, an intermediate pipe 11, a mass block 2, a guide pipe 12, and a plug 14. The mass block 2 has grooves on both sides to form a weak point. During excitation, the mass block 2 detaches and strikes the bottom of the wellbore vertically, generating a longitudinal wave.

[0042] Combustible gas and oxygen are unidirectionally introduced into the gas chamber through the inlet pipe 5, and a one-way valve ensures that the gas does not leak out. When it is necessary to generate a longitudinal wave source, a gas explosion device is first buried at a certain depth, making the device perpendicular to the horizontal plane. The ignition head is led out from the top cover 13, receives high-voltage electrical energy, and generates an electric spark, causing the mixed gas to undergo laminar combustion and detonation. The intermediate pipe 11 is the place where the gas is sealed. The ignition head receives high-voltage electrical energy, generates an electric spark, and causes the mixed gas to undergo laminar combustion and detonation. The mass block 2 has double-sided slots to form a weak point. During activation, the mass block 2 detaches, passes through the guide pipe 12, and strikes the bottom of the wellbore vertically. The plug 14 is located at the bottom of the gas chamber, making the gas chamber a sealed device, and has a weak structure to ensure that only the plug 14 is blown open by the airflow, forming a longitudinal wave in the buried medium.

[0043] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A guide tube device for directional excitation of a gas explosion source, characterized in that: The device includes a sealed outer shell (1), inside which a mass block (2) is horizontally arranged. The mass block (2) divides the interior of the sealed outer shell (1) into an explosion chamber (3) located above the mass block (2) and a guide chamber (4) located below the mass block (2). An initiation assembly (6) is arranged in the explosion chamber (3). A first weak structure (21) is provided on the side wall of the mass block (2), and a second weak structure (15) is provided at the bottom of the sealed outer shell (1). The projection of the first weak structure (21) along the height direction falls within the second weak structure (15).

2. The guide tube device for directional excitation of a gas explosion source according to claim 1, characterized in that: The detonation assembly (6) includes an ignition head located inside the explosion chamber (3), the top of which extends from the top of the sealed housing (1).

3. The guide tube device for directional excitation of a gas explosion source according to claim 2, characterized in that: An air inlet pipe (5) is provided at the top of the sealed outer shell (1). The outlet end of the air inlet pipe (5) is connected to the explosion chamber (3). A one-way valve is provided at the inlet end of the air inlet pipe (5). The one-way valve controls the entry of external gas into the air inlet pipe (5).

4. The guide tube device for directional excitation of a gas explosion source according to claim 1, characterized in that: The first weak structure (21) includes a first groove (211) formed on the mass block (2). The first groove (211) is an annular structure and is coaxially arranged with the mass block (2). The groove depth of the first groove (211) is less than the height of the mass block (2).

5. The guide tube device for directional excitation of a gas explosion source according to claim 4, characterized in that: The first groove (211) includes a first upper groove portion opened on the top of the mass block (2) and a first lower groove portion opened on the bottom of the mass block (2), with a gap between the first upper groove portion and the first lower groove portion.

6. The guide tube device for directional excitation of a gas explosion source according to claim 4, characterized in that: The second weak structure (15) includes a second groove (151) formed at the bottom of the sealing shell (1). The groove depth of the second groove (151) is less than the bottom wall thickness of the sealing shell (1). The top of the second groove (151) is spaced from the bottom inner wall of the sealing shell (1).

7. The guide tube device for directional excitation of a gas explosion source according to claim 6, characterized in that: The diameter of the second groove (151) is not less than the diameter of the first groove (211).

8. The guide tube device for directional excitation of a gas explosion source according to claim 6, characterized in that: The side wall thickness T of the sealing shell (1) and the thickness t at the position where the second groove (151) is opened on the bottom wall of the sealing shell (1) conform to the following formula: T:t=2~4:

1.

9. The guide tube device for directional excitation of a gas explosion source according to claim 1, characterized in that: The sealed outer shell (1) includes an intermediate tube (11) opposite to the explosion chamber (3) and a guide tube (12) opposite to the guide chamber (4). The top end of the intermediate tube (11) is fixedly connected to a top cover (13), and the bottom end of the guide tube (12) is fixedly connected to a plug (14). The top cover (13), the intermediate tube (11), the guide tube (12) and the plug (14) form a closed chamber.

10. The guide tube device for directional excitation of a gas explosion source according to claim 9, characterized in that: The mass block (2) is located at the connection point between the intermediate tube (11) and the guide tube (12).

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