Bridge wire, detection circuit and perforating gun for initiation detection

Abstract

This utility model relates to the field of perforation gun technology, disclosing a bridge wire, detection circuit, and perforation gun for detonation detection. The bridge wire for detonation detection includes: a first bridge head, a first bridge rod, a bridge bend, a second bridge rod, and a second bridge head connected sequentially. The first bridge head is connected to one end of the first bridge rod, the other end of the first bridge rod is connected to one end of the bridge bend, the other end of the bridge bend is connected to one end of the second bridge rod, and the other end of the second bridge rod is connected to the second bridge head. The first and second bridge heads are used to fix the bridge wire, the bridge bend is used to lock onto the detonator, the first and second bridge rods are used to connect the bridge bend and the bridge head together, and the bridge wire is conductive to be disconnected by the shock wave of detonation. The bridge wire, detection circuit, and perforation gun provided by this utility model solve the problems of high cost, complex structure, and poor reliability in the prior art, achieving safe and stable detection of detonation.

Description

Technical Field

[0001] This utility model relates to the field of perforation gun technology, and in particular to a bridge wire for detonation detection, a detection circuit, and a perforation gun. Background Technology

[0002] In perforation operations, monitoring the detonation signal is a crucial step in ensuring operational safety and efficiency. Traditional detonation monitoring methods primarily employ physical or mechanical approaches, which suffer from numerous drawbacks: high cost, complex structure, poor reliability, and difficulty in guaranteeing signal accuracy and equipment stability during electrical signal conversion. For instance, using accelerometers requires pre-collecting downhole detonation vibration signals and setting thresholds based on signal magnitude, resulting in significant upfront work. Furthermore, the mechanical nature of accelerometers makes them susceptible to damage from the shockwave generated by the explosion, leading to unreliable signal monitoring.

[0003] Therefore, how to design a reliable and safe detonation detection structure is an urgent problem to be solved. Utility Model Content

[0004] The purpose of this utility model is to provide at least one bridge wire for detonation detection, which can at least solve the technical problems of simple detonation structure and convenient installation, and at least achieve the technical effects of reducing costs and simplifying structure.

[0005] To address the aforementioned technical problems, at least one embodiment of this application provides a bridge wire for detonation detection, comprising: a first bridge head, a first bridge rod, a bridge bend, a second bridge rod, and a second bridge head connected in sequence; the first bridge head is connected to one end of the first bridge rod, the other end of the first bridge rod is connected to one end of the bridge bend, the other end of the bridge bend is connected to one end of the second bridge rod, and the other end of the second bridge rod is connected to the second bridge head; the first bridge head and the second bridge head are used to fix the bridge wire, the bridge bend is used to lock onto the detonator, the first bridge rod and the second bridge rod are used to connect the bridge bend and the bridge head together, and the bridge wire is conductive and is designed to be disconnected by the shock wave of detonation during detonation.

[0006] At least one embodiment of this application also provides a bridge wire detection circuit for detonation detection, which solves the problem that traditional detection signals are difficult to guarantee accuracy and equipment stability, and improves the accuracy and stability of detonation detection.

[0007] To solve the above-mentioned technical problems, at least one embodiment of this application provides a bridge wire detection circuit for detonation detection, including: a voltage follower sub-circuit and a voltage setting sub-circuit connected to each other, used to detect whether the bridge wire is open, the input terminal of the voltage follower sub-circuit is connected to the output terminal of the voltage setting sub-circuit and serves as the input terminal of the detection circuit, and the output terminal of the voltage follower sub-circuit serves as the output terminal of the detection circuit; the input terminal of the voltage follower sub-circuit is used to connect to one end of the bridge wire, and the other end of the bridge wire is grounded.

[0008] At least one embodiment of this application also provides a perforation gun, including the detonation detection bridge wire and the detonation detection bridge wire detection circuit as described above, which solves the technical problems of high cost, complex structure and poor reliability of detonation detection in the prior art, and realizes safe and stable detonation detection.

[0009] The embodiments of this application provide a bridge wire, detection circuit, and perforation gun for detonation detection. Compared with the prior art, the use of a bridge wire and a bridge wire detection circuit solves the problem that the mechanical mechanism of the acceleration sensor in the prior art is easily damaged by the shock wave generated by the explosion, resulting in unreliable signal monitoring.

[0010] In addition, the first bridge head has the same structure as the second bridge head, which is a ring with a central through hole for fixing the bridge wire.

[0011] In addition, the first bridge pole and the second bridge pole have the same structure, which is a straight structure. The straight structure can connect the bridgehead and the bridge bend at the lowest cost.

[0012] In addition, the bridge bend is used to fit with the detonator, and the external structure of the fitting part with the cross section of the detonator is the same. The fitting structure with the detonator ensures that the detonation bridge wire is easy and stable to install.

[0013] In addition, the voltage follower sub-circuit includes an amplifier. The positive input terminal of the amplifier serves as the input terminal of the bridge wire detection circuit for detonation detection, and its negative input terminal is connected to its output terminal. The amplifier is configured as a follower to ensure the stability of signal transmission.

[0014] In addition, the voltage setting subcircuit includes a first resistor-capacitor series combination. One end of the first resistor-capacitor series combination is connected to the power supply, and the other end is connected to ground. The series connection point of the resistor-capacitor series combination serves as the output terminal of the voltage setting subcircuit, which is connected to the output terminal of the voltage follower subcircuit. The voltage setting subcircuit ensures the difference between the detection circuit when the bridge wire is open and when it is not open, thus ensuring the reliability of the detection.

[0015] In addition, the delay sub-circuit has its output terminal connected to the power supply terminal of the voltage follower sub-circuit, with one end connected to the power supply terminal and the other end grounded. The delay sub-circuit ensures the stability of the detection circuit during startup.

[0016] Additionally, the display sub-circuit, with one end connected to the output of the voltage follower sub-circuit and the other end connected to the power supply, is used to display the detonation status. Attached Figure Description

[0017] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0018] Figure 1 This is a schematic diagram of a bridge wire structure according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the bridge wire detection circuit structure according to an embodiment of the present invention;

[0020] Figure 3 This is a partial structural diagram of a perforating gun according to an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to enable readers to better understand this utility model. However, the technical solutions claimed by this utility model can be implemented even without these technical details and with various changes and modifications based on the following embodiments.

[0022] Example 1:

[0023] The present invention relates to a bridge wire for detonation detection.

[0024] Compared with the prior art, the embodiment of this utility model uses a bridge wire for detonation detection, which simplifies the detonation cost and thus solves the problem of unreliable signal monitoring caused by easy failure or sensor damage in existing mechanical detonation.

[0025] The following is a detailed description of the implementation details of this embodiment. The following content is only for the convenience of understanding and is not necessary for implementing this solution.

[0026] The present invention provides a bridge wire for detonation detection, such as... Figure 1 As shown, it includes: a first bridgehead, a first bridge pole, a bridge bend, a second bridge pole, and a second bridgehead connected in sequence. The first bridgehead is connected to one end of the first bridge pole, the other end of the first bridge pole is connected to one end of the bridge bend, the other end of the bridge bend is connected to one end of the second bridge pole, and the other end of the second bridge pole is connected to the second bridgehead.

[0027] The first and second bridge ends are used to fix the bridge wire to the target plate, the bridge bend is used to lock onto the detonating cord, the first and second bridge rods are used to connect the bridge bend to the bridge end, and the bridge wire is used to be disconnected by the shock wave of the detonation during the first stage of detonation.

[0028] The first and second bridgeheads have the same structure, consisting of a circular ring with a central through hole.

[0029] The first and second bridge poles have the same structure, which is a straight line.

[0030] The bridge bend is used to fit the detonator and is the same as the external structural part of the detonator's cross-section; in this application, it is arched.

[0031] The first bridgehead, the first bridge pole, the bridge bend, the second bridge pole, and the second bridgehead are all integrated into one structure.

[0032] Bridge wires are made of metal and have electrical conductivity.

[0033] The thickness of the first bridge abutment, the first bridge pillar, the bridge bend, the second bridge pillar, and the second bridge abutment is the same.

[0034] This embodiment provides a bridge wire for detonation detection, which uses a bridge bend to bypass the detonating cord and a bridge head to fix the bridge wire to the explosion-proof plate. Since the bridge wire can bypass the detonating cord, the detonating cord can cause the bridge wire to break during detonation. The breakage of the bridge wire can be used to detect detonation. Moreover, the bridge wire has a simple structure, thus solving the problems of high cost and complex structure of detonation devices, reducing the use of mechanical parts, and avoiding the problem of unreliable signal monitoring due to mechanical failure or sensor damage.

[0035] Example 2

[0036] The present invention provides a bridge wire detection circuit for detonation detection, including a voltage follower sub-circuit and a voltage setting sub-circuit connected to each other. The output terminal of the voltage setting sub-circuit is the input terminal of the voltage follower sub-circuit and is used to connect to one end of the bridge wire, while the other end of the bridge wire is grounded.

[0037] The voltage setting subcircuit includes a resistor and a capacitor connected in series. One end of the resistor is connected to the power supply, the series connection point of the resistor and capacitor is the output terminal of the voltage setting subcircuit, and the other end of the capacitor is grounded.

[0038] The voltage follower sub-circuit includes an amplifier. The positive input terminal of the amplifier serves as the input terminal of the voltage follower sub-circuit, the negative input terminal of the amplifier is connected to its output terminal, and the output terminal of the amplifier serves as the output terminal of the voltage follower sub-circuit, outputting the detonation detection signal.

[0039] A bridge wire detection circuit for detonation detection also includes a display sub-circuit and a delay start circuit. One end of the display sub-circuit is connected to the power supply, and the other end is connected to the output terminal of the voltage follower sub-circuit.

[0040] The display sub-circuit includes a current-limiting resistor and a light-emitting diode connected in series. One end of the current-limiting resistor is connected to the power supply terminal, and the other end is connected to the positive terminal of the light-emitting diode. The negative terminal of the light-emitting diode is connected to the output terminal of the amplifier.

[0041] One end of the delayed start circuit is connected to the power supply, its output is connected to the power supply of the amplifier, and its output is grounded. It is used for delayed start of the voltage follower sub-circuit.

[0042] Specifically, such as Figure 2 As shown, the two ports of the JP4 interface are used to connect to the two ends of the bridge wire, one port of the JP4 interface is grounded, and the other port is connected to the positive input terminal of the amplifier, one end of resistor R19, and one end of capacitor C16. The other end of resistor R19 is connected to the 3.3V power supply, and the other end of capacitor C16 is grounded. When there is no bridge wire on the two ports of the JP4 interface, resistor R19 and capacitor C16 are connected in series to set the positive input terminal of the amplifier to a high level. When there is a bridge wire on the two ports of the JP4 interface, due to the conductivity of the bridge wire, the positive input terminal of the amplifier is pulled low.

[0043] The negative input terminal of the amplifier is connected to the output terminal. Because the amplifier is set as a follower circuit, the voltage at its output terminal is equal to that at its positive input terminal. That is, when the positive input terminal of the amplifier is high, the output terminal is also high, and when the positive input terminal is low, the output terminal is also low, outputting a detection signal.

[0044] One end of resistor R27 is connected to the 3.3V power supply, and the other end is connected to the positive terminal of LED3. The negative terminal of LED3 is connected to the output terminal of the amplifier. When the output terminal of the amplifier is high, LED3 does not light up, and when the output terminal of the amplifier is low, LED3 lights up.

[0045] One end of resistor R16 is connected to the 3.3V power supply, and the other end is connected to the power supply of the amplifier and one end of capacitor C12. The other end of capacitor C12 is grounded.

[0046] The series combination of resistor R16 and capacitor C12, and the series combination of resistor R19 and capacitor C16, enables the amplifier to start with a delay upon power-up. Similarly, the series combination of resistor R19 and capacitor C16 enables the amplifier to achieve a delayed high level at the positive input terminal upon power-up.

[0047] This embodiment provides a bridge wire detection circuit for detonation detection. Under normal conditions, the bridge wire sets the input of the voltage follower sub-circuit to a low level, and its output also outputs a low level. When the bridge wire is open, the voltage setting sub-circuit sets the input of the voltage follower sub-circuit to a high level, and its output also outputs a high level. Detonation is detected by changing the output level. A display sub-circuit is used to indicate whether detonation has occurred. This achieves both detection and display of detonation, reducing interference and misoperation during signal transmission and improving operational safety.

[0048] Example 3

[0049] The embodiments of this utility model also provide a perforating gun, such as... Figure 3 As shown, it includes a bridge wire, a detonating cord, a flow-deflecting explosion-proof plate, and a detection circuit board. The flow-deflecting explosion-proof plate has a through hole in its center. The detonating cord passes through the through hole and is installed perpendicular to the flow-deflecting explosion-proof plate. The flow-deflecting explosion-proof plate has two mounting positions. One of the bridge ends of the bridge wire is fixed to one of the mounting positions. The bridge bend of the bridge wire is clamped around the periphery of the detonating cord. The detection circuit board is equipped with the bridge wire detection circuit for detonation detection described in this application.

[0050] During installation, the bridge wire is fixed to the mounting position of the flow-through explosion-proof plate. The bridge wire detection circuit outputs a low level. When the first stage of the perforation gun is detonated, the generated shock wave acts on the bridge wire, causing it to break. The bridge wire detection circuit then outputs a high level to detect the detonation.

[0051] This embodiment of a perforating gun features a simple and low-cost detonation detection structure. By using the breakage of the bridge wire as a detonation signal, it can effectively detect detonation and improve the safety and efficiency of perforating operations.

[0052] It should be understood that the terms "mechanism," "device," "component," etc., used in this application are merely one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they can be replaced by other expressions.

[0053] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention. In practical applications, the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification, and various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A bridge wire for use in initiating detection, characterized by include: The first bridgehead, the first bridge pole, the bridge bend, the second bridge pole, and the second bridgehead are connected in sequence. The first bridgehead is connected to one end of the first bridge pole, the other end of the first bridge pole is connected to one end of the bridge bend, the other end of the bridge bend is connected to one end of the second bridge pole, and the other end of the second bridge pole is connected to the second bridgehead. The first bridge head and the second bridge head are used to fix the bridge wire, the bridge bend is used to lock onto the detonator, the first bridge rod and the second bridge rod are used to connect the bridge bend and the bridge head together, and the bridge wire is conductive and is used to be disconnected by the shock wave of detonation during detonation.

2. A bridge wire for use in initiation detection according to claim 1, wherein The first bridgehead has the same structure as the second bridgehead, which is a ring with a central through hole.

3. A bridge wire for use in initiating detection according to claim 1, wherein The first bridge pole and the second bridge pole have the same structure, which is a straight structure.

4. A bridge wire for use in initiating detection according to claim 1, wherein The bridge bend is used to fit with the detonator, and the external structure of the part that fits with the cross section of the detonator is the same.

5. A bridge wire detection circuit for use in a detonation detection, characterized by include: The interconnected voltage follower sub-circuit and voltage setting sub-circuit are used to detect whether the bridge wire is open. The input terminal of the voltage follower sub-circuit is connected to the output terminal of the voltage setting sub-circuit and serves as the input terminal of the detection circuit. The output terminal of the voltage follower sub-circuit serves as the output terminal of the detection circuit. The input terminal of the voltage follower sub-circuit is connected to one end of the bridge wire, and the other end of the bridge wire is grounded.

6. A bridge wire detection circuit for use in a detonation detection system according to claim 5, wherein: The voltage follower sub-circuit includes an amplifier, the positive input terminal of which serves as the input terminal of the bridge wire detection circuit for detonation detection, and its negative input terminal is connected to its output terminal.

7. A bridge wire detection circuit for use in a detonation detection system according to claim 5, wherein: The voltage setting subcircuit includes a first resistor-capacitor series combination. One end of the first resistor-capacitor series combination is connected to the power supply, and the other end is connected to ground. The series connection point of the resistor-capacitor series combination serves as the output terminal of the voltage setting subcircuit and is connected to the output terminal of the voltage follower subcircuit.

8. A bridge wire detection circuit for use in a detonation detection system according to claim 5, wherein: It also includes a delay sub-circuit, the output of which is connected to the power supply of the voltage follower sub-circuit, with one end connected to the power supply and the other end grounded.

9. A bridge wire detection circuit for use in a detonation detection system according to claim 5, wherein: It also includes a display sub-circuit, one end of which is connected to the output of the voltage follower sub-circuit, and the other end is connected to the power supply.

10. A perforating gun, characterized by, The device includes a bridge wire, a detection circuit board, a detonating cord, and a flow-guiding explosion-proof plate as described in any one of claims 1-4. The detection circuit board is provided with a bridge wire detection circuit for detonation detection as described in any one of claims 5-9. The flow-guiding explosion-proof plate has a through hole at its center. The detonating cord passes through the through hole and is installed perpendicular to the flow-guiding explosion-proof plate. The flow-guiding explosion-proof plate has two mounting positions. One bridge head of the bridge wire is fixed to one mounting position. The bridge bend of the bridge wire is engaged with the periphery of the detonating cord.

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