Delayed ignition initiation recognition apparatus, method, device, medium, and product

Abstract

The application relates to the technical field of perforating, in particular to a delay ignition and detonation identification device, method, apparatus, medium and product, wherein the device comprises a fuse, a differential pressure detection unit and a control unit; the fuse is arranged in a perforating gun and is used for generating a detonation signal in response to a shock wave of detonation; the differential pressure detection unit is arranged in a gun barrel of the perforating gun and is used for generating a differential pressure signal in response to mud entering the gun barrel; and the control unit is connected with the fuse and the differential pressure detection unit respectively and is used for generating an ignition signal in response to the detonation signal and the differential pressure signal; the cost of the delay ignition and detonation identification device is reduced.

Description

Technical Field

[0001] This invention relates to the field of perforation technology, and particularly to a delayed ignition detonation identification device, method, apparatus, medium, and product. Background Technology

[0002] The relevant delayed ignition detonation device consists of two parts: a diaphragm detonation device and a delayed detonation device. The diaphragm detonation device is expensive and is a disposable consumable that cannot be reused. There is a technical problem in this field: the high cost of delayed ignition detonation identification equipment. Summary of the Invention

[0003] This invention provides a delayed ignition detonation identification device, method, apparatus, medium, and product, which solves the technical problem of high cost of delayed ignition detonation identification devices.

[0004] In a first aspect, the present invention provides a delayed ignition detonation identification device, comprising: a fuse, a differential pressure detection unit, and a control unit; the fuse is disposed in a perforating gun and is used to generate an ignition signal in response to the shock wave of detonation; the differential pressure detection unit is disposed inside the barrel of the perforating gun and is used to generate a differential pressure signal in response to the entry of mud into the barrel; the control unit is connected to the fuse and the differential pressure detection unit respectively and is used to generate an ignition signal in response to the detonation signal and the differential pressure signal.

[0005] In some embodiments, the fuse is broken by the shock wave upon detonation, generating a detonation signal.

[0006] In some embodiments, the differential pressure detection unit includes a piston that moves after mud enters the barrel of the perforating gun to generate a differential pressure signal.

[0007] In some embodiments, the differential pressure detection unit further includes a contact switch connected to the piston for closing under the push of the piston to generate a differential pressure signal.

[0008] Secondly, the present invention provides a delayed ignition and detonation identification method based on any of the above-mentioned delayed ignition and detonation identification devices, the method comprising: detecting the detonation signal generated by the breakage of the fuse and the differential pressure signal generated by the entry of mud into the barrel; starting a delay after detecting the detonation signal and the differential pressure signal; generating an ignition signal after a preset delay time to detonate the next stage perforation.

[0009] In some embodiments, the method further includes: presetting the delay time of each stage of the perforation to achieve sequential detonation of the multi-stage perforation gun.

[0010] Thirdly, the present invention provides a delayed ignition detonation identification device, the device comprising: a detection module for detecting the detonation signal generated by the breakage of the fuse and the differential pressure signal generated by the entry of mud into the barrel; a delay module for starting a delay after detecting the detonation signal and the differential pressure signal; and an action module for generating an ignition signal after a preset delay time to detonate the next stage perforation hole.

[0011] Fourthly, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any of the delayed ignition detonation identification methods described above.

[0012] Fifthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the delayed ignition and detonation identification methods described above.

[0013] In a sixth aspect, the present invention provides a computer program product, including a computer program that, when executed by a processor, implements the steps of any of the delayed ignition and detonation identification methods described above.

[0014] This invention provides a delayed ignition detonation identification device, method, apparatus, medium, and product. The device includes: a fuse, a differential pressure detection unit, and a control unit. The fuse is disposed in a perforating gun and is used to generate an ignition signal in response to the shock wave of detonation. The differential pressure detection unit is disposed inside the barrel of the perforating gun and is used to generate a differential pressure signal in response to the entry of mud into the barrel. The control unit is connected to the fuse and the differential pressure detection unit respectively and is used to generate an ignition signal in response to the detonation signal and the differential pressure signal. This reduces the cost of the delayed ignition detonation identification device. Attached Figure Description

[0015] The invention will now be described in more detail with reference to embodiments and the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a delayed ignition and detonation identification device provided in an embodiment of this application;

[0017] Figure 2 This is a flowchart illustrating a delayed ignition and detonation identification method provided in an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the structure of a delayed ignition and detonation identification device provided in an embodiment of this application.

[0019] In the accompanying drawings, the same parts are referred to by the same reference numerals, and the drawings are not drawn to scale. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention and to fully understand and implement the process of how the present invention uses technical means to solve technical problems and achieve corresponding technical effects, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. The embodiments of the present invention and the various features therein can be combined with each other without conflict, and the resulting technical solutions are all within the protection scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0023] The relevant delayed ignition detonation device consists of two parts: a diaphragm detonation device and a delayed detonation device. The diaphragm detonation device is expensive and is a disposable consumable that cannot be reused. There is a technical problem in this field: the high cost of delayed ignition detonation identification equipment.

[0024] The technical solution of this application will be described below with reference to specific embodiments.

[0025] Example 1

[0026] Figure 1 This is a schematic diagram of the structure of a delayed ignition detonation identification device provided in an embodiment of this application. Figure 1As shown in the technical solution of this embodiment, a delayed ignition detonation identification device is provided, including: a fuse, a differential pressure detection unit, and a control unit; the fuse is disposed in the perforating gun and is used to generate an ignition signal in response to the shock wave of detonation; the differential pressure detection unit is disposed in the barrel of the perforating gun and is used to generate a differential pressure signal in response to the mud entering the barrel; the control unit is connected to the fuse and the differential pressure detection unit respectively and is used to generate an ignition signal in response to the detonation signal and the differential pressure signal.

[0027] The technical problem to be solved in this embodiment is how to construct a low-cost, reusable delayed ignition and detonation identification device. In traditional oil and gas well perforation technology, the diaphragm detonation device used is expensive and a disposable consumable, and the multi-stage delayed detonation device is costly. Furthermore, traditional devices suffer from the problem of being disposable and costly. Therefore, there is a technical problem in the art that requires a low-cost and reusable ignition and detonation identification device.

[0028] The technical solution of this embodiment utilizes a delayed ignition detonation identification device comprising a fuse, a differential pressure detection unit, and a control unit. The fuse, located within the perforating gun, generates an initiation signal upon the generation of a shock wave during detonation. It is reusable, reducing costs compared to disposable baffle-based detonation devices. The differential pressure detection unit, located inside the perforating gun barrel, responds to the differential pressure signal generated by mud entering the barrel. The control unit, connected to both the fuse and the differential pressure detection unit, generates an ignition signal based on the detonation signal and the differential pressure signal. This device architecture avoids the use of expensive disposable baffle-based detonation devices, utilizing the coordinated operation of the fuse and the differential pressure detection unit to achieve detonation identification, thus constructing a reusable and low-cost device.

[0029] The technical solution of this embodiment brings significant technical benefits. First, in terms of cost, by using reusable fuses to detect the detonation signal, it avoids the need for new, expensive components each time the device is used, as is the case with traditional diaphragm detonation devices, greatly reducing long-term operating costs. For example, in multiple perforation operations, traditional diaphragm detonation devices require repurchase and installation each time, while the fuses in this device are very inexpensive, resulting in considerable cost savings for scenarios with frequent perforation operations. Second, in terms of reliability, the fuse and differential pressure detection unit work together to accurately determine the detonation state. The control unit is only triggered to generate an ignition signal when the fuse responds to the shock wave and the differential pressure detection unit detects the differential pressure signal generated by mud entering the barrel. This effectively avoids false detonations. For example, if only a single signal is detected, it may be a false signal caused by external interference or fuse malfunction. The dual-signal detection mechanism can effectively eliminate these interference factors, improving the safety of perforation operations. Finally, in terms of equipment reusability, the overall structural design of the device allows all components except the fuse to function in multiple perforation operations, reducing resource waste.

[0030] Example 2

[0031] Based on the above embodiments, the fuse is broken by the shock wave when it detonates, generating a detonation signal.

[0032] The technical problem this embodiment aims to solve is how to detect whether the previous stage perforation has been detonated. During the operation of a multi-stage perforating gun, it is necessary to accurately determine whether the previous stage perforating gun has been successfully detonated so that subsequent detonation operations can proceed smoothly.

[0033] The technical solution of this embodiment detects the detonation of the previous stage perforation gun by generating a detonation signal by breaking the fuse when it is detonated by the shock wave. In the complete technical solution, the fuse is placed between the two posts of the perforation gun. When the upper stage detonates and generates a shock wave, the energy of the shock wave is sufficient to break the fuse. The broken fuse transmits a short-circuit signal to the control unit through the through-wire of the current stage perforation gun. In this way, the control unit can receive the fuse breaking signal and thus determine that the previous stage perforation gun has been successfully detonated.

[0034] The technical solution of this embodiment brings significant technical benefits. From an accuracy perspective, the signal generation method of the fuse being broken by the shock wave is very direct and clear. Under normal circumstances, the fuse will only break when the upper-level perforating gun detonates and generates a shock wave of sufficient intensity. From a timeliness perspective, once the shock wave is generated, the fuse will break immediately and transmit a signal, which the control unit can quickly receive with almost no delay, thus ensuring that subsequent detonation procedures can keep up in time. This timeliness is crucial in the sequential detonation process of multi-stage perforating guns. For example, if it is not determined in time that the upper-level perforating gun has detonated, it will lead to delays or chaos in the entire perforation operation. This solution can effectively avoid this situation, improving the efficiency and safety of the perforation operation.

[0035] Example 3

[0036] Based on the above embodiments, the differential pressure detection unit includes a piston that moves after the mud enters the barrel of the perforating gun to generate a differential pressure signal.

[0037] The technical problem this embodiment aims to solve is how to improve the detection reliability of the detonation of the previous stage perforation gun. In oil and gas well perforation operations, ensuring the reliability of the detection of the detonation of the previous stage perforation gun is crucial for the safety and smooth progress of the entire operation.

[0038] The technical solution of this embodiment improves the reliability of detecting the detonation of the previous stage perforation by incorporating a piston in the differential pressure detection unit. In the application example described later, the piston is located inside the barrel of the perforating gun. When mud enters the barrel of the perforating gun, the piston moves. Because the intrusion of mud into the barrel after detonation is an inevitable process, the movement of the piston is directly related to the intrusion of mud, so the movement of the piston can serve as a reliable signal source to generate a differential pressure signal. This signal generated by the physical process (mud pushing the piston) is closely related to the detonation and can more accurately reflect the detonation situation compared to a single fuse breakage signal detection method.

[0039] The technical solution of this embodiment brings significant technical benefits. In terms of reliability, the piston movement is based on the phenomenon of mud entering the barrel, which is an inevitable result of the perforating gun detonation. For example, in complex downhole environments, various interference factors exist, such as formation vibration and fluid fluctuations. However, mud only enters the barrel in large quantities to push the piston after the perforating gun has actually detonated, thus greatly reducing the possibility of misjudgment. Compared to relying on a single signal (such as fuse breakage), the pressure difference signal generated by piston movement more accurately reflects the detonation state of the perforating gun. From a stability perspective, the piston movement is a relatively stable physical process. As long as the equipment is working normally, the process of mud entering the barrel and pushing the piston is predictable and stable. This stability allows the detection system to work continuously and reliably, providing accurate detection signals stably during long-term or multiple perforation operations, thereby improving the safety and reliability of the entire perforation operation.

[0040] Example 4

[0041] Based on the above embodiments, the differential pressure detection unit further includes a contact switch, which is connected to the piston and is used to close under the push of the piston to generate a differential pressure signal.

[0042] The technical problem this embodiment aims to solve is how to generate differential pressure signals at low cost. During detonation detection, an economical and efficient method is needed to generate differential pressure signals in order to accurately determine the detonation state.

[0043] The technical solution of this embodiment generates a differential pressure signal at low cost by setting a contact switch connected to the piston in the differential pressure detection unit. In the application example described later, when mud enters the barrel of the perforating gun, the piston moves, pushing the contact switch connected to it to close, thereby generating a differential pressure signal. This method utilizes a simple mechanical structure (piston and contact switch), eliminating the need for complex electronic equipment or expensive sensors to generate differential pressure signals, effectively reducing costs.

[0044] The technical solution of this embodiment brings significant technical benefits. From a cost perspective, using a combination of piston and contact switch to generate differential pressure signals avoids the use of complex and expensive differential pressure sensors. For example, some high-precision differential pressure sensors are expensive and easily damaged in harsh downhole environments, requiring frequent replacements, which undoubtedly increases costs. In contrast, the piston and contact switch in this solution have a simple structure, low cost, and can adapt to the high-temperature environment downhole. Even if a failure occurs after repeated use, the cost of repair or replacement is relatively low. In terms of reliability, this mechanical structure has high stability. The movement of the piston directly drives the contact switch to close. As long as the design and manufacture of the piston and contact switch meet the requirements and can operate normally in the downhole environment, a stable differential pressure signal can be generated. Compared with some electronic signal generation methods, the mechanical structure is less affected by factors such as electromagnetic interference, thus generating differential pressure signals more reliably and providing stable signal support for detonation detection.

[0045] Example 5

[0046] Figure 2 This is a flowchart illustrating a delayed ignition and detonation identification method provided in an embodiment of this application, as shown below. Figure 2 As shown, in the technical solution of this embodiment, a delayed ignition and detonation identification method based on any of the delayed ignition and detonation identification devices in the above embodiments is provided. The method includes: detecting the detonation signal generated by the fuse breaking and the pressure difference signal generated by the mud entering the barrel; after detecting the detonation signal and the pressure difference signal, starting a delay; and generating an ignition signal after a preset delay time to detonate the next stage perforation.

[0047] The technical problem this embodiment aims to solve is how to perform delayed ignition detonation identification. In the operation of multi-stage perforating guns, an accurate and effective method is needed to perform delayed ignition detonation identification to ensure that each stage of the perforating gun detonates in a predetermined sequence and time interval.

[0048] The technical solution of this embodiment detects the detonation signal generated by fuse breakage and the pressure difference signal generated by mud entering the barrel. Once both signals are detected, a delay is initiated. After a preset delay time, the next perforation stage is detonated for delayed ignition detonation identification. In the application example described later, the fuse breakage signal indicates that the previous perforation stage has detonated, and the pressure difference signal generated by mud entering the barrel further confirms the detonation status. After receiving these two signals, the control unit starts timing according to the preset delay time. When the delay ends, it controls the high-voltage output to detonate the detonator, thus completing the delayed ignition detonation identification process.

[0049] The technical solution of this embodiment brings significant technical benefits. In terms of accuracy, the dual-signal detection mechanism ensures the accuracy of detonation identification. Delay and subsequent detonation operations only begin when the detonation signal generated by the fuse breaking and the differential pressure signal generated by the mud entering the barrel occur simultaneously. This embodiment constructs a safety system requiring dual verification; only when both conditions are met can the next operation proceed, effectively avoiding misjudgments. For example, in complex downhole environments, various interference signals may appear. If detonation identification relies solely on a single signal, it is easily affected by these interference signals, leading to false detonations. However, dual-signal detection can effectively eliminate these interferences. In terms of flexibility, by presetting the delay time, the detonation time interval of each perforating gun can be flexibly adjusted according to different construction requirements. For example, different formation structures or perforation layouts require different detonation time intervals to achieve the optimal perforation effect. This solution can easily meet these diverse needs by preset parameters. From a safety perspective, this delayed ignition and detonation identification method ensures that all levels of perforating guns detonate in the predetermined order and time, avoiding safety accidents caused by chaotic detonation sequence or detonation too early or too late, and improving the safety of the entire perforation operation.

[0050] Example 6

[0051] Based on the above embodiments, the method further includes: presetting the delay time of each stage of the perforation to achieve sequential detonation of the multi-stage perforation gun.

[0052] The technical problem this embodiment aims to solve is how to achieve sequential detonation of multi-stage perforating guns. In oil and gas well perforation operations, multi-stage perforating guns need to be detonated sequentially according to a preset order to achieve the desired perforation effect, which requires an effective control method.

[0053] The technical solution of this embodiment achieves sequential detonation of multi-stage perforating guns by pre-setting the delay time for each stage of perforation. In the application example described later, after the first-stage perforating gun detonates, a delay device installed between the two perforating guns is triggered. The control unit times the perforating guns according to the preset delay time. After the set delay is reached, the next stage perforating gun is detonated, thus completing the subsequent tubing perforation operations in a predetermined order. The delay time for each stage can be the same or different to adapt to different construction requirements.

[0054] The technical solution of this embodiment brings significant technical benefits. From a construction perspective, by pre-setting a delay duration to achieve sequential detonation of multi-stage perforating guns, the perforation sequence and time intervals can be precisely controlled according to different formation conditions and perforation requirements. For example, in some complex formations, it is necessary to first perforate at a specific location, and then perforate at an adjacent location after a certain period to achieve optimal oil and gas extraction. This solution can meet this requirement by pre-setting an appropriate delay duration, making perforation operations more scientific and rational. From a safety perspective, this sequential detonation method effectively avoids the safety hazards caused by simultaneous detonation of multiple perforating guns or chaotic detonation sequences. For example, if multiple perforating guns detonate simultaneously, excessive impact force will be generated, damaging downhole equipment and the wellbore. Detonation according to a predetermined sequence can disperse the impact force, ensuring the safety of downhole operations. From an operational convenience perspective, the pre-set delay duration makes operation simpler and more intuitive. Operators can set the delay time of each perforating gun according to the construction design plan before the equipment is installed. During the operation, the equipment can automatically detonate according to the preset sequence and time, reducing the possibility of manual intervention and operation errors, and improving operation efficiency.

[0055] Example 7

[0056] Figure 3 This is a schematic diagram of the structure of a delayed ignition and detonation identification device provided in an embodiment of this application, as shown below. Figure 3 As shown, in the technical solution of this embodiment, a delayed ignition detonation identification device is provided. The device includes: a detection module for detecting the detonation signal generated by the fuse breaking and the pressure difference signal generated by the mud entering the barrel; a delay module for starting a delay after detecting the detonation signal and the pressure difference signal; and an action module for generating an ignition signal after a preset delay time to detonate the next stage perforation hole.

[0057] The technical problem to be solved in this embodiment is how to construct a low-cost, reusable delayed ignition and detonation identification device. In traditional oil and gas well perforation technology, the diaphragm detonation device used is expensive and a disposable consumable, and the multi-stage delayed detonation device is costly. Furthermore, traditional devices suffer from the problem of being disposable and costly. Therefore, there is a technical problem in the art that requires a low-cost and reusable ignition and detonation identification device.

[0058] The technical solution of this embodiment utilizes a delayed ignition detonation identification device comprising a fuse, a differential pressure detection unit, and a control unit. The fuse, located within the perforating gun, generates an initiation signal upon the generation of a shock wave during detonation. It is reusable, reducing costs compared to disposable baffle-based detonation devices. The differential pressure detection unit, located inside the perforating gun barrel, responds to the differential pressure signal generated by mud entering the barrel. The control unit, connected to both the fuse and the differential pressure detection unit, generates an ignition signal based on the detonation signal and the differential pressure signal. This device architecture avoids the use of expensive disposable baffle-based detonation devices, utilizing the coordinated operation of the fuse and the differential pressure detection unit to achieve detonation identification, thus constructing a reusable and low-cost device.

[0059] The technical solution of this embodiment brings significant technical benefits. First, in terms of cost, by using reusable fuses to detect the detonation signal, it avoids the need for new, expensive components each time the device is used, as is the case with traditional diaphragm detonation devices, greatly reducing long-term operating costs. For example, in multiple perforation operations, traditional diaphragm detonation devices require repurchase and installation each time, while the fuses in this device are very inexpensive, resulting in considerable cost savings for scenarios with frequent perforation operations. Second, in terms of reliability, the fuse and differential pressure detection unit work together to accurately determine the detonation state. The control unit is only triggered to generate an ignition signal when the fuse responds to the shock wave and the differential pressure detection unit detects the differential pressure signal generated by mud entering the barrel. This effectively avoids false detonations. For example, if only a single signal is detected, it may be a false signal caused by external interference or fuse malfunction. The dual-signal detection mechanism can effectively eliminate these interference factors, improving the safety of perforation operations. Finally, in terms of equipment reusability, the overall structural design of the device allows all components except the fuse to function in multiple perforation operations, reducing resource waste. Other technical features of this embodiment correspond to those of the above embodiments, and will not be repeated here.

[0060] Example 8

[0061] In the technical solution of this embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory. The processor executes the computer program to implement the steps of any of the delayed ignition detonation identification methods in the above embodiments.

[0062] In the technical solution of this embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of any of the delayed ignition and detonation identification methods described in the above embodiments.

[0063] In the technical solution of this embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of any of the delayed ignition and detonation identification methods described in the above embodiments.

[0064] The processor may include, but is not limited to, one or more processors or microprocessors. Each processor may be implemented as an Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor, or other electronic component, for performing the methods in the above embodiments. The computer-readable storage medium may be implemented by any type of volatile or non-volatile storage device or a combination thereof, and may include, but is not limited to, random access memory (RAM), read-only memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, computer storage media (e.g., hard disk, floppy disk, solid-state drive, removable disk, CD-ROM, DVD-ROM, Blu-ray disc, etc.).

[0065] Computer-readable storage media may also store at least one computer-executable program / instruction, such as computer-readable instructions. Computer-readable storage media include, but are not limited to, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory. Computer-readable storage media may include, for example, read-only memory (ROM), hard disk, flash memory, etc. For example, a non-transitory computer-readable storage medium may be connected to a computing device such as a computer, and then, when the computing device executes the computer-readable instructions stored on the computer-readable storage medium, the various methods described above can be performed.

[0066] In addition, the computer device may also include (but is not limited to) a data bus, an input / output (I / O) bus, a display, and input / output devices (e.g., a keyboard, mouse, speakers, etc.). The processor can communicate with external devices via the I / O bus through a wired or wireless network. In one embodiment, the at least one computer-executable instruction may also be compiled into or comprise a software product / computer program product, wherein one or more computer-executable instructions, when executed by the processor, perform the steps of the various functions and / or methods in the embodiments described herein.

[0067] Example 9

[0068] Based on the above embodiments, this embodiment provides an application example.

[0069] Current ignition delay detonation devices consist of two parts: a diaphragm detonation device and a delay detonation device. The diaphragm detonation device is expensive, a disposable consumable, and cannot be reused. Sometimes, there are 5 to 6 clusters of oil injection holes at a time, and the cost of the multi-stage delay detonation device alone can reach 50,000 to 60,000 yuan. The detonation tube delay time is 10 minutes ± 1 minute, which is fixed and makes it difficult to flexibly select the delay time according to construction requirements. The high cost of ignition delay devices is a technical problem in this field.

[0070] Therefore, there is a need to design a reusable, cost-effective, and time-adjustable delayed ignition device. This invention designs an initiation identification device that determines whether the barrel has successfully detonated by detecting two signals: the shock wave signal generated during initiation and the pressure difference between the liquid columns inside and outside the barrel after penetration.

[0071] In some related technologies, a bidirectional delayed detonation transmission device for oil and gas well perforation is provided, including a main body and two independent ignition delayed detonation transmission systems, namely a symmetrical combination of a diaphragm igniter, a delayed detonation transmitter, and a bidirectional detonation transmission system. Regardless of which end the detonation wave triggers the device from, one of the ignition delayed detonation transmission systems will be activated, realizing the bidirectional delayed detonation transmission function of delayed detonation products for oil and gas wells, and removing technical obstacles to achieving dual-initiation in perforation processes using delayed detonation products.

[0072] However, the relevant technology still uses time-delay baffles for perforation of oil and gas wells to achieve delayed detonation of the perforation. These baffles are expensive and are disposable. At the same time, the time-delay detonation tube is a pyrotechnic item, which is subject to strict civil explosive control, has high storage and transportation costs, and a long registration and certification period.

[0073] In some related technologies, perforation failures are frequently encountered during oil and gas well perforation operations, mainly due to initiation failure. To improve the success rate of perforation operations, it is necessary to monitor the initiation status. Currently, most technologies employ two methods for initiation monitoring: vibration pressurization and pressure pulse.

[0074] The vibration pressurization method refers to the first-stage explosive being detonated by a shear piston. After the first stage detonates, each electronically delayed detonation section receives an extremely high vibration signal indicating detonation. A pressure sensor measures the signal value, and if it exceeds a set threshold, this serves as the detonation trigger condition. The pressure pulse method involves installing a pressure sensor above the electronically delayed detonation section and using a series of pressure pulses from the ground as the detonation command.

[0075] However, the vibration pressurization method requires the detection of vibration signals, the magnitude of which is uncertain; the pressure pulse method is uncertain whether the pressure sensor will be damaged during the explosion, and if the detonation monitoring process only monitors the liquid column pressure difference signal and ignores the shock wave signal, problems with the gun barrel sealing surface may cause external mud to slowly enter, generating an incorrect liquid column pressure difference signal, thereby causing a false detonation.

[0076] The purpose of this invention is to solve the technical problems existing in the above-mentioned technologies and to design an electronic delayed ignition and detonation identification device. The aim is to design a reusable delayed ignition and detonation identification device that reduces costs, allows for flexible selection of the detonation delay time, and ensures safety and reliability without the need for a delay partition.

[0077] Figure 1 This is an electronic delayed ignition and detonation identification device provided in an embodiment of the present invention. For example... Figure 1 As shown, to achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0078] The electronic delayed ignition detonation identification device includes a fuse (100), a sieve plate (200), a buffer section (300), a contact switch (400), a control circuit, and a through wire (500). These components work together to achieve control of the detonation state detection.

[0079] The buffer sub 300 consists of components such as a buffer piston, a shock-absorbing spring, a piston rod, and a buffer sub housing. It can effectively buffer the impact force generated during detonation and protect the stability of the device.

[0080] The success of detonation is determined by detecting two key signals: a shock wave signal and a liquid column pressure difference signal. The shock wave signal is detected by the breakage of a designed fuse, while the liquid column pressure difference signal is detected by the internal liquid column pressure difference generated after mud enters the barrel. This dual-signal detection mechanism avoids misjudgments that may occur with single-signal detection, thereby improving the accuracy of detonation identification.

[0081] During initiation, the barrel penetration generates a shock wave signal, and external mud enters the gun body, pushing the buffer piston until the contact switch closes, thus completing the ignition circuit. When the control unit detects the fuse tripping signal, it confirms that the first stage has been successfully initiated, thereby triggering the control unit to start timing. The combination of these two signals provides double protection for initiation, ensuring the reliability of the initiation process.

[0082] The control circuit of the control unit, through preset parameters such as detonation delay time, ignition voltage, and voltage boost delay, starts timing upon receiving a trigger signal indicating fuse tripping. Once the voltage boost delay time is complete, voltage boosting begins, and the ignition voltage is maintained within the preset range. When the detonation delay timer ends, the high-voltage output is controlled, achieving detonation of the detonator.

[0083] The electronic delayed ignition and detonation identification device of the present invention, through the above-mentioned technical solution, not only solves the problems of high cost, single use, and inflexible delay time in the prior art, but also significantly improves the safety and efficiency of perforation operations through innovative structural design and control strategy.

[0084] The embodiments adopted according to the technical solution of the present invention are as follows: The embodiments of the electronic delayed ignition detonation identification device of the present invention are as follows:

[0085] The entire system consists of key components such as fuses, screen plates, buffer pistons, contact switches, and control circuits. First, a multi-stage perforating gun is fed into the target formation via a continuous tubing system. The fuse is positioned between the two posts of the perforating gun, outside the screen plate. When the previous stage explodes, the resulting shock wave breaks the fuse. After the fuse breaks, a short-circuit signal is transmitted to the control unit through the through-line of the current perforating gun, causing the control unit to receive a fuse disconnection signal.

[0086] The buffer sub is composed of components such as a buffer piston, a shock-absorbing spring, a piston rod, and a buffer sub housing. It can effectively buffer the impact force generated during detonation and protect the stability of the device.

[0087] Instead of the traditional time-delay baffle, the first section uses a pressurization method. When the pressure reaches a preset value, the first perforation gun detonates. After detonation, mud enters the well and pushes the buffer piston, closing the contact switch.

[0088] Upon detonation, a shock wave signal is first generated, which is detected by the breakage of the designed fuse. Secondly, after the mud enters the barrel of the perforating gun through the screen tube, a liquid column pressure differential signal is generated, which pushes the buffer piston, closes the contact switch, and enables the control unit to receive the pressure differential signal.

[0089] During the explosion, the fuse is cut, generating a trigger signal. Upon detecting the fuse disconnection signal, the control unit confirms that the first stage has detonated and begins timing. Based on a preset delay, it controls the ignition of the electronic detonator of the next-stage perforating gun, achieving inter-stage delayed detonation. After the first-stage perforating gun detonates, the delay device installed between the two perforating guns is triggered. After the set delay is reached, the second-stage perforating gun is detonated, and this detonation process achieves inter-stage delayed detonation, completing subsequent tubing perforation operations. The delay durations of each stage can be the same or different to achieve sequential detonation of multiple perforating guns.

[0090] Through the above embodiments, the electronic delayed ignition detonation identification device of the present invention not only improves the safety and reliability of perforation operations, but also achieves precise control of the detonation time through intelligent control, thus meeting diverse construction requirements.

[0091] The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many modifications based on the teachings of this invention without departing from its spirit, and all such modifications are within the scope of protection of this invention.

[0092] The electronic delayed ignition and detonation identification device of this invention is reusable, significantly reducing long-term operating costs compared to traditional disposable delay partitions. It overcomes the limitations of fixed delay times in traditional devices, allowing for flexible design and selectable detonation delay times, providing greater flexibility to adapt to different perforation construction requirements. Through a dual-signal detection mechanism—simultaneously detecting the shock wave signal through fuse melting and the liquid column pressure difference signal through a buffer piston—it avoids misjudgments that may be caused by a single signal, preventing the risk of accidental detonation and thus improving operational safety. In the device design, the breaking of the fuse generates a reliable detonation signal, which, combined with the liquid column pressure difference signal, ensures that ignition is only triggered when a true detonation occurs, enhancing the accuracy and reliability of detonation identification.

[0093] This invention employs a dual detection method using shock wave signals and liquid column pressure difference signals, ensuring that detonation is only considered successful when both signals are present simultaneously. This mechanism is a core innovation of this invention, improving the accuracy and reliability of detonation identification.

[0094] The mechanism of generating a trigger signal by breaking a fuse is a key technical point of this invention, which ensures the accurate transmission of the detonation signal.

[0095] An electronic delayed ignition detonation identification device includes: (1) a fuse for detecting shock wave signals; (2) a differential pressure detection unit for detecting differential pressure signals; and (3) an electronic control circuit for receiving the two signals and triggering ignition when the two signals occur simultaneously.

[0096] The fuse is designed to break upon detonation to generate a detonation signal.

[0097] The differential pressure detection unit includes a piston that moves after the mud enters the barrel, generating a differential pressure signal.

[0098] The electronic control circuit includes: (1) a signal detection unit for detecting the signal generated by the fuse breakage and the differential pressure signal; (2) a timing unit for starting timing after receiving the two signals; and (3) an ignition control unit for controlling the ignition of the electronic detonator after a preset time.

[0099] The buffer section includes a buffer piston, a shock-absorbing spring, a piston rod, and a buffer section housing, which are used to buffer the impact force of the piston and generate an initiation trigger signal.

[0100] The device is designed to be reusable and does not rely on disposable consumables.

[0101] The device allows for flexible setting of the detonation delay time to adapt to different construction requirements.

[0102] The device also includes a contact switch, which, when mud enters, pushes a buffer piston to close the ignition circuit.

[0103] The device also includes an inter-stage delay detonation mechanism to enable sequential detonation of multi-stage perforating guns.

[0104] In the embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0105] It should be noted that, in this invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element limited by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0106] While the embodiments disclosed in this invention are as described above, the above content is merely for the purpose of facilitating understanding of this invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope disclosed in this invention; however, the scope of patent protection of this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A delayed ignition and detonation identification device, characterized in that, include: Fuse, differential pressure detection unit, control unit; The fuse is installed in the perforation gun and is used to generate an initiation signal in response to the shock wave of detonation. The differential pressure detection unit is installed inside the barrel of the perforating gun and is used to generate a differential pressure signal in response to the mud entering the barrel. The control unit is connected to the fuse and the differential pressure detection unit respectively, and is used to generate an ignition signal in response to the detonation signal and the differential pressure signal.

2. The delayed ignition and detonation identification device according to claim 1, characterized in that, The fuse is broken by the shock wave upon detonation, generating a detonation signal.

3. The delayed ignition and detonation identification device according to claim 1, characterized in that, The differential pressure detection unit includes: The piston moves after the mud enters the barrel of the perforating gun, generating a pressure differential signal.

4. The delayed ignition and detonation identification device according to claim 3, characterized in that, The differential pressure detection unit further includes: A contact switch, connected to the piston, is used to close under the push of the piston to generate a differential pressure signal.

5. A delayed ignition and detonation identification method based on the delayed ignition and detonation identification device according to any one of claims 1 to 4, characterized in that, The method includes: Detects the detonation signal generated by fuse breakage and the differential pressure signal generated by mud entering the barrel; Once the detonation signal and differential pressure signal are detected, a time delay begins. An ignition signal is generated after a preset delay to detonate the next stage of the perforation.

6. The delayed ignition and detonation identification method according to claim 5, characterized in that, The method further includes: The delay time of each perforation stage is preset to achieve sequential detonation of the multi-stage perforation gun.

7. A delayed ignition and detonation identification device based on any one of claims 1 to 4, characterized in that, The device includes: The detection module is used to detect the detonation signal generated by the fuse breaking and the differential pressure signal generated by the mud entering the barrel; The delay module is used to start a delay after the detonation signal and the differential pressure signal are detected; The action module is used to generate an ignition signal after a preset delay to detonate the next stage of the perforation.

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the delayed ignition detonation identification method according to any one of claims 5 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the delayed ignition detonation identification method according to any one of claims 5 to 6.

10. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the steps of the delayed ignition detonation identification method according to any one of claims 5 to 6.

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