Underground explosion digital monitoring instrument, method and equipment for explosion loosening

Abstract

The invention belongs to the technical field of petroleum drilling engineering, particularly relates to an explosion loosening underground explosion digital monitoring instrument, method and equipment, and aims to solve the problems that the explosion of underground explosive is misjudged on site, and engineering accidents are more complicated. The device comprises an explosion rod used for fixing a detonating cord and an electric detonator; the electronic ignition switch is used for controlling the detonation of the detonating cord according to the received ignition switch control signal; the explosion safety assembly is used for connecting the electric detonator and the weighting rod; the weighting rod is used for increasing the weight of the monitoring instrument; the three-dimensional vibration measurement short section is used for measuring an explosion vibration signal, measuring a cable head voltage value and converting the voltage value into an electric signal; the magnetic positioner is used for positioning the monitoring instrument and correcting the depth of the monitoring instrument so as to generate positioning and depth correction electric signals; and the cable head is used for connecting an instrument and a cable. According to the method, the subsequent redundant workload caused by complicated treatment of the drill jamming accident can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of drilling engineering technology, specifically relating to a digital monitoring instrument, method, and equipment for downhole explosions caused by explosive loosening. Background Technology

[0002] As oil exploration and development deepens, drilling becomes increasingly difficult. Drilling sticking accidents caused by geological or human factors occur frequently. After a sticking incident, it is urgent to remove the drill string above the sticking point in a timely manner to reduce accident losses. The explosive loosening technology uses a logging cable to send an explosive charge to a depth of several thousand meters in the well. The explosive charge is detonated on the surface, and the high temperature and high pressure vibration generated by the explosion on the drill string threads causes the drill string threads to loosen and retract instantly, achieving precise removal of the drill string at the expected depth. This simplifies accident handling procedures and reduces accident losses.

[0003] People on the surface cannot directly perceive the explosion of explosives thousands of meters deep in a well. They mainly rely on the applied counter-torque and changes in the weight of the drill string to indirectly determine whether the explosives have exploded. However, due to well inclination, well depth, and drill string structure, the applied counter-torque and changes in the weight of the drill string are not obvious. It can only be determined whether the explosives have exploded after the explosion loosening monitoring instrument is retrieved. If inappropriate measures are taken blindly, there is a risk that unexploded explosive charges at the wellhead may be accidentally detonated, causing an explosion and injury. Alternatively, before the explosion loosening monitoring instrument is retrieved from the wellhead, the on-site technicians may misanalyze the explosion of the downhole explosives and blindly adopt measures such as reversing the original drill string or moving the drill string, which may result in the drill string above the explosion point being reversed and the cable being crushed, making the accident more complicated. Summary of the Invention

[0004] To address the aforementioned problems in existing technologies, namely, the misjudgment of downhole explosive explosions by on-site technicians leading to the blind adoption of measures such as reversing the original drilling tools or moving the drilling tools, resulting in the drilling tools above the explosion point being reversed and the cables being damaged, further complicating the accident, this invention provides a digital monitoring instrument for downhole explosions involving loose connections. The monitoring instrument comprises, in sequence, an explosion rod, an explosion safety assembly, a weighted rod, a three-dimensional vibration measurement sub, a magnetic locator, and a cable head; the monitoring instrument operates under the control of a programmable power supply.

[0005] The explosive rod is used to fix the detonating cord and the electric detonator; the electric detonator is connected to the detonating cord, and the detonating cord is evenly distributed on the explosive rod;

[0006] The explosion safety assembly is used to connect the electric detonator and the weight rod, and to transmit and switch ignition switch signals; the explosion safety assembly includes an explosion safety trigger, which is connected to the detonating cord and the electric detonator. When the current of the ignition circuit is transmitted to the explosion safety trigger through the weight rod, the detonating cord and the electric detonator are detonated.

[0007] The weighting rod is used to increase the weight of the monitoring instrument. It contains a conductive circuit, which is used to transmit the current when the ignition circuit is turned on.

[0008] A three-dimensional vibration measurement sub is used to measure the vibration values ​​of the monitoring instrument in the X, Y, and Z directions caused by the explosion shock wave generated by the detonating cord explosion in the well, measure the actual voltage value of the programmable power supply acting on the monitoring instrument after cable loss, and control the on / off of the ignition circuit based on the cable head voltage value; at the same time, the shock vibration value and cable head voltage value are converted into electrical signals and transmitted to the ground. When the ignition circuit is turned on, the current is transmitted to the detonating cord and electric detonator; a magnetic locator is used to locate and calibrate the depth of the monitoring instrument, generate positioning and depth calibration electrical signals and transmit them to the ground.

[0009] The cable head is used for the transition between the cable and the instrument. It connects the programmable power supply and the processing system via the cable, transmits the voltage of the programmable power supply to the entire monitoring instrument, and transmits the positioning and depth calibration electrical signals to the processing system.

[0010] In a preferred embodiment, the three-dimensional vibration measurement section includes a housing and a measurement and monitoring instrument core; the measurement and monitoring instrument core includes a main control board, a DC-DC power supply circuit, and a three-dimensional vibration sensor.

[0011] In a preferred embodiment, the main control board includes a cable head voltage monitoring circuit, a vibration sensor measurement circuit, a main control circuit, a cable drive circuit, and an electronic ignition switch circuit.

[0012] The vibration sensing and measurement circuit is used to transmit the vibration signal output by the three-dimensional vibration sensor to the amplifier after being blocked by capacitive coupling, and the amplified vibration signal enters the main control circuit.

[0013] The cable head voltage monitoring circuit is used to measure the actual voltage value applied to the monitoring instrument after the ground voltage has passed through cable loss;

[0014] The cable drive circuit is used to encode the vibration signal and cable head voltage value collected by the main control board using Manchester encoding, and then transmit them to the ground processing system.

[0015] The electronic ignition switch is used to control the current flow. When the measured cable head voltage is greater than 180V, the circuit to the detonator is turned on, thereby detonating the electric detonator attached to the detonator. When the measured cable head voltage is less than 180V, the circuit to the explosion safety fuse is turned off.

[0016] In a preferred embodiment, the electronic ignition switch is a control circuit combining P-MOS and N-MOS. When the cable head voltage is below 180V, the circuit to the detonator is closed; when the cable head voltage is above 180V, the current to the safety trigger is turned on, the electric detonator is detonated, and after 10 seconds of conduction, the circuit to the explosion safety trigger is automatically turned off.

[0017] In a preferred embodiment, the programmable power supply is used to power the detection and monitoring instrument, and the power supply voltage can be adjusted.

[0018] In a preferred embodiment, the processing system includes a signal separation circuit, a signal amplification circuit, a signal decoding circuit, and software;

[0019] The positioning and depth calibration electrical signals, the encoded vibration signals, and the encoded cable head voltage values ​​are separated by a signal separation circuit, amplified by a signal amplification circuit, and decoded by a signal decoding circuit before being transmitted to the software.

[0020] The software presents the cable head voltage value measured downhole, the vibration signals of the monitoring instrument in the X, Y, and Z axes, and the positioning and depth calibration electrical signals of the magnetic locator in the form of curves.

[0021] In a preferred embodiment, the three-dimensional vibration sensor is current-type, powered by constant current, and its vibration amplitude is directly proportional to the output current value. The vibration amplitude generated by the explosion impact received by the monitoring instrument is calibrated by the magnitude of the output current.

[0022] A second aspect of the present invention provides a digital monitoring method for downhole explosions caused by explosive loosening of the connection, based on the operation of the digital monitoring instrument for downhole explosions caused by explosive loosening of the connection described in section 1 above. The monitoring method includes:

[0023] The digital monitoring instrument for the explosion loosening well was sent down into the well using a logging winch.

[0024] The monitoring instrument is positioned and calibrated by a magnetic locator to obtain positioning and depth calibration electrical signals. Based on the obtained positioning and depth calibration electrical signals, the middle part of the detonating cord wrapped on the explosive rod is aligned with the drill thread.

[0025] Turn on the programmable power supply, adjust the voltage to 90V, and monitor the status of the monitoring instrument in real time through the software of the processing system.

[0026] Determine the continuity and integrity of the cable and monitoring instruments based on the cable head voltage value displayed by the software;

[0027] When the monitoring instrument and cable are fully connected, adjust the voltage of the programmable power supply to 180V, which is the detonation voltage of the detonator. The detonator detonates and then the detonating cord is detonated.

[0028] The detonation status of electric detonators and detonating cords is determined based on the curve changes displayed by the software. All measured curves are displayed digitally.

[0029] A third aspect of the present invention provides a digital monitoring device for downhole explosions caused by loosening of the plug, comprising:

[0030] At least one processor; and a memory communicatively connected to at least one of the processors; wherein the memory stores instructions executable by the processor to implement the above-described digital monitoring method for explosive loosening in wells.

[0031] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions for execution by the computer to implement the above-described digital monitoring method for explosion loosening in wells.

[0032] The beneficial effects of this invention are:

[0033] (1) This invention can monitor the continuity of the downhole monitoring instrument circuit in real time and record the explosion of the downhole explosive when the detonation is loosened. The explosive power can be displayed according to the magnitude of the three-dimensional impact vibration of the monitoring instrument, so that the site can judge in time whether the detonating cord has been detonated. The amount of explosive required for different types of detonation can be determined by analyzing the magnitude of the explosion impact vibration.

[0034] (2) The downhole explosion monitoring system of the present invention can analyze the working status of downhole monitoring instruments and the explosion situation of explosives in real time. Before unexploded explosives leave the wellhead, corresponding safety measures can be taken to eliminate the possibility of accidental detonation, thereby improving the safety of this technology.

[0035] (3) The present invention can also provide decision-making basis for the next step of the on-site technicians in advance. By adopting this system, the subsequent redundant workload caused by the complexity of stuck drill accidents can be reduced. Attached Figure Description

[0036] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0037] Figure 1 This is a schematic diagram of a digital monitoring instrument for explosive loosening of well plugs according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of a three-dimensional vibration measurement section according to an embodiment of the present invention;

[0039] Figure 3This is a schematic diagram of a cable head voltage monitoring circuit according to an embodiment of the present invention;

[0040] Figure 4 This is a circuit diagram of a three-dimensional vibration sensor according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of an electronic ignition switch circuit according to an embodiment of the invention;

[0042] Figure 6 This is a schematic diagram of the structure of a computer system used to implement the methods, systems, and devices of this application. Detailed Implementation

[0043] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] This invention provides a digital monitoring instrument for downhole explosions caused by loosening of the connection. The monitoring instrument includes, in sequence, an explosion rod, an explosion safety assembly, a weighted rod, a three-dimensional vibration measurement sub, a magnetic positioning device, and a cable head. The monitoring instrument operates under the control of a programmable power supply.

[0046] The explosive rod is used to fix the detonating cord and the electric detonator; the electric detonator is connected to the detonating cord, and the detonating cord is evenly distributed on the explosive rod;

[0047] The explosion safety assembly is used to connect the electric detonator and the weight rod, and to transmit and switch ignition switch signals; the explosion safety assembly includes an explosion safety trigger, which is connected to the detonating cord and the electric detonator. When the current of the ignition circuit is transmitted to the explosion safety trigger through the weight rod, the detonating cord and the electric detonator are detonated.

[0048] The weighting rod is used to increase the weight of the monitoring instrument. It contains a conductive circuit, which is used to transmit the current when the ignition circuit is turned on.

[0049] A three-dimensional vibration measurement sub is used to measure the vibration values ​​of the monitoring instrument in the X, Y, and Z directions caused by the explosion shock wave generated by the detonating cord explosion in the well, measure the actual voltage value of the programmable power supply acting on the monitoring instrument after cable loss, and control the on / off of the ignition circuit based on the cable head voltage value; at the same time, the shock vibration value and cable head voltage value are converted into electrical signals and transmitted to the ground. When the ignition circuit is turned on, the current is transmitted to the detonating cord and electric detonator; a magnetic locator is used to locate and calibrate the depth of the monitoring instrument, generate positioning and depth calibration electrical signals and transmit them to the ground.

[0050] The cable head is used for the transition between the cable and the instrument. It connects the programmable power supply and the processing system via the cable, transmits the voltage of the programmable power supply to the entire monitoring instrument, and transmits the positioning and depth calibration electrical signals to the processing system.

[0051] To more clearly explain the digital monitoring instrument for downhole explosions caused by loosening of the plug in this invention, the following will be combined with... Figure 1 The steps in the embodiments of the present invention will be described in detail below.

[0052] The first embodiment of the present invention provides a digital monitoring instrument for downhole explosions involving loosening of the connection point. The monitoring instrument comprises, in sequence, an explosion rod, an explosion safety assembly, a weighted rod, a three-dimensional vibration measurement sub-section, a magnetic positioning system, and a cable head. Detailed descriptions of each module are as follows:

[0053] The explosive rod is used to fix the detonating cord and the electric detonator; the electric detonator is connected to the detonating cord, and the detonating cord is evenly distributed on the explosive rod;

[0054] The explosion safety assembly is used to connect the electric detonator and the weight rod, and to transmit and switch ignition switch signals; the explosion safety assembly includes an explosion safety trigger, which is connected to the detonating cord and the electric detonator. When the current of the ignition circuit is transmitted to the explosion safety trigger through the weight rod, the detonating cord and the electric detonator are detonated.

[0055] The weighting rod is used to increase the weight of the monitoring instrument. It contains a conductive circuit, which is used to transmit the current when the ignition circuit is turned on.

[0056] The three-dimensional vibration measurement section is used to measure the vibration values ​​of the monitoring instrument in the X, Y, and Z directions caused by the explosion shock wave generated by the explosion of the detonating cord in the well, measure the actual voltage value of the programmable power supply acting on the monitoring instrument after cable loss, and control the on / off of the ignition circuit according to the cable head voltage value; at the same time, it converts the shock vibration value and the cable head voltage value into electrical signals and transmits them to the ground. When the ignition circuit is turned on, the current transmitted to the detonating cord and electric detonator is conducted.

[0057] In this embodiment, the three-dimensional vibration measurement section includes a housing and a core of a measurement and monitoring instrument. The core of the measurement and monitoring instrument includes a main control board, a DC-DC power supply circuit, and a three-dimensional vibration sensor. The three-dimensional vibration sensor is current-type, powered by constant current, and its vibration amplitude is directly proportional to the output current value. The magnitude of the output current is used to calibrate the vibration amplitude generated by the explosion impact received by the monitoring instrument. The main control board includes a cable head voltage monitoring circuit, a vibration sensor measurement circuit, a main control circuit, a cable drive circuit, and an electronic ignition switch. The vibration sensing measurement circuit is used to send the vibration signal output by the three-dimensional vibration sensor to an amplifier after being capacitively coupled and DC blocked. The amplified vibration signal then enters the main control circuit.

[0058] like Figure 2 As shown, the cable head voltage value and the three-dimensional vibration sensor signal are processed and then enter the main control circuit. The cable drive circuit transmits the collected impact vibration signal, cable head voltage value, and other data to the ground through a single-core cable using Manchester encoding. The encoding rate is 20.83KHz, and the symbol period is T = 48us. The main control circuit controls the opening of the electronic ignition switch.

[0059] like Figure 3 The diagram shows a cable head voltage monitoring circuit used to measure the actual voltage value applied to the monitoring instrument after the ground voltage has passed through cable losses. Specifically, the cable head voltage is divided by a voltage divider resistor to form a measurable voltage of 0.7-3V. The divided signal is then followed by a primary amplifier. To prevent interference spikes on the cable head voltage from damaging the amplifier's input, a clamping protection diode is added. This diode has a protection voltage threshold of 4.3V. Exceeding this voltage triggers internal avalanche, clamping the voltage below 4.3V, which is lower than the amplifier's power supply voltage of 5V, thus protecting the amplifier's input. The amplifier's output signal is filtered by an RC filter circuit to reduce interference and jitter in the acquired signal. The bandwidth is F = 1 / (2πRC), and the calculated center frequency is 160Hz. The signal is then sent to the main controller (430 analog-to-digital converter) to obtain a digital value, which is then converted into the cable voltage value using a formula.

[0060] like Figure 4The diagram shows the circuit diagram of a three-dimensional vibration sensor. A gravity accelerometer is installed inside the three-dimensional vibration sensor to convert the explosion impact vibration sensed by the monitoring instrument into an electrical signal. The three-dimensional vibration sensor is powered by a constant current voltage obtained by voltage division of the cable head voltage. The vibration amplitude is directly proportional to the output current value. The output current enters the vibration sensor measurement circuit. After being blocked by a capacitor, the output current enters the amplifier input terminal. To collect negative voltage signals, a 2.5V signal is also input at the input terminal for summation. The vibration sensor input range is -2.5V to 2.5V, and the amplifier output voltage range is 0-5V, within the range of the ADC. The operational amplifier used is an OP284, powered by a single power supply.

[0061] The cable drive circuit is used to encode the vibration signals and cable head voltage collected by the main control board using Manchester encoding, and then transmit them to the ground processing system.

[0062] like Figure 5 The diagram shows an electronic ignition switch circuit that controls the on / off state of the ignition voltage. When the cable voltage is below 180V, Q2 is in the off state, and Q1's Vgs = 0, so Q1 is also in the off state. When the cable voltage is above 180V and remains so for 3 seconds, Q2 turns on. The voltage divider circuit composed of R16, R15, and R18 makes Q1's Vgs = (-12V), so Q1 conducts, and the ignition voltage is output through DCOUT. Q1 turns off after conducting for 10 seconds.

[0063] The electronic ignition switch controls the current flow. When the measured cable head voltage is greater than 180V, the circuit to the detonator is activated, thus detonating the electric detonator attached to the detonator. When the measured cable head voltage is less than 180V, the circuit to the detonator is deactivated. In this embodiment, the electronic ignition switch is a control circuit combining a P-MOS transistor and an N-MOS transistor. When the cable head voltage is below 180V, the circuit to the detonator is deactivated; when the cable head voltage is greater than 180V, current flows to the detonator, igniting the electric detonator. After 10 seconds of activation, the circuit to the detonator automatically deactivates.

[0064] A magnetic locator is used to locate and calibrate the depth of the monitoring instrument, generating positioning and depth calibration electrical signals and transmitting them to the ground.

[0065] The cable head is used for the transition between the cable and the instrument. It connects the programmable power supply and the processing system via the cable, transmitting the voltage from the programmable power supply to the entire monitoring instrument, and transmitting the positioning and depth calibration electrical signals to the processing system.

[0066] In this embodiment, the programmable power supply is used to power the detection and monitoring instrument.

[0067] In this embodiment, the processing system includes a signal separation circuit, a signal amplification circuit, a signal decoding circuit, and software. The positioning and depth calibration electrical signals, the encoded vibration signals, and the encoded cable head voltage values ​​are separated by the signal separation circuit, amplified by the signal amplification circuit, and decoded by the signal decoding circuit before being transmitted to the software. The software presents the downhole measured cable head voltage values, the vibration signals of the monitoring instrument in the X, Y, and Z axes, and the positioning and depth calibration electrical signals of the magnetic locator in a curve format.

[0068] Although the steps in the above embodiments are described in the above order, those skilled in the art will understand that in order to achieve the effect of this embodiment, different steps do not need to be executed in such an order. They can be executed simultaneously (in parallel) or in a reverse order. These simple variations are all within the protection scope of this invention.

[0069] It should be noted that the monitoring instruments provided in the above embodiments are only illustrative examples of the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the modules or steps in the embodiments of the present invention can be further decomposed or combined. For example, the modules in the above embodiments can be merged into one module, or further divided into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the various modules or steps and are not considered as an improper limitation of the present invention.

[0070] The second embodiment of the present invention provides a digital monitoring method for downhole explosions caused by explosive loosening of the connection. Based on the operation of the aforementioned digital monitoring instrument for downhole explosions caused by explosive loosening of the connection, the monitoring method includes:

[0071] The digital monitoring instrument for the explosion loosening well was sent down into the well using a logging winch.

[0072] The monitoring instrument is positioned and calibrated by a magnetic locator to obtain positioning and depth calibration electrical signals. Based on the obtained positioning and depth calibration electrical signals, the middle part of the detonating cord wrapped on the explosive rod is aligned with the drill thread.

[0073] Turn on the programmable power supply, adjust the voltage to 90V, and monitor the status of the monitoring instrument in real time through the software of the processing system.

[0074] Determine the continuity and integrity of the cable and monitoring instruments based on the cable head voltage value displayed by the software;

[0075] When the monitoring instrument and cable are fully connected, adjust the voltage of the programmable power supply to 180V, which is the detonation voltage of the detonator. The detonator detonates and then the detonating cord is detonated.

[0076] The detonation status of electric detonators and detonating cords is determined based on the curve changes displayed by the software. All measured curves are displayed digitally.

[0077] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process and related explanations of the methods described above can be found in the corresponding processes in the aforementioned instrument embodiments, and will not be repeated here.

[0078] A digital monitoring device for downhole explosions according to a third embodiment of the present invention includes:

[0079] At least one processor; and a memory communicatively connected to at least one of the processors;

[0080] The memory stores instructions that can be executed by the processor to implement the aforementioned digital monitoring method for explosion loosening in wells.

[0081] A fourth embodiment of the present invention provides a computer-readable storage medium storing computer instructions, which are executed by the computer to implement the above-described digital monitoring method for explosion loosening in underground mines.

[0082] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process and related descriptions of the devices and storage media described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0083] Those skilled in the art will recognize that the modules and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. The programs corresponding to the software modules and method steps can be placed in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art. To clearly illustrate the interchangeability of electronic hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the invention.

[0084] The following is for reference. Figure 6 It shows a schematic diagram of the structure of a computer system for implementing the methods, systems, and devices of this application. Figure 6The server shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0085] like Figure 6 As shown, the computer system includes a Central Processing Unit (CPU) 601, which can perform various appropriate actions and processes based on programs stored in Read Only Memory (ROM) 602 or programs loaded from storage section 608 into Random Access Memory (RAM) 603. The RAM 603 also stores various programs and data required for system operation. The CPU 601, ROM 602, and RAM 603 are interconnected via a bus 604. An Input / Output (I / O) interface 605 is also connected to the bus 604.

[0086] The following components are connected to I / O interface 605: an input section 606 including a keyboard, mouse, etc.; an output section 607 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 608 including a hard disk, etc.; and a communication section 609 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to I / O interface 605 as needed. A removable medium 611, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 610 as needed so that computer programs read from it can be installed into storage section 608 as needed.

[0087] Specifically, according to embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 609, and / or installed from removable medium 611. When the computer program is executed by central processing unit (CPU) 601, it performs the functions defined in the methods of this application. It should be noted that the computer-readable medium described above in this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in connection with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on a computer-readable medium can be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0088] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0089] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. 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 indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated 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 the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0090] The terms “first”, “second”, etc., are used to distinguish similar objects, not to describe or indicate a specific order or sequence.

[0091] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0092] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A digital monitoring instrument for downhole explosions caused by loosening of the locking mechanism, characterized in that, The monitoring instrument includes, in sequence, an explosive rod, an explosive safety assembly, a weighted rod, a three-dimensional vibration measurement section, a magnetic locator, and a cable head; The explosive rod is used to fix the detonating cord and the electric detonator; the electric detonator is connected to the detonating cord, and the detonating cord is evenly distributed on the explosive rod; The explosion safety assembly is used to connect the electric detonator and the weight rod, and to transmit and switch ignition switch signals; the explosion safety assembly includes an explosion safety trigger, which is connected to the detonating cord and the electric detonator. When the current of the ignition circuit is transmitted to the explosion safety trigger through the weight rod, the detonating cord and the electric detonator are detonated. The weighting rod is used to increase the weight of the monitoring instrument. It contains a conductive circuit, which is used to transmit the current when the ignition circuit is turned on. A three-dimensional vibration measurement sub is used to measure the vibration values ​​of the monitoring instrument in the X, Y, and Z directions caused by the explosion shock wave generated by the detonating cord explosion in the well, measure the actual voltage value of the programmable power supply acting on the monitoring instrument after cable loss, and control the on / off of the ignition circuit based on the cable head voltage value; at the same time, the shock vibration value and cable head voltage value are converted into electrical signals and transmitted to the ground. When the ignition circuit is turned on, the current is transmitted to the detonating cord and electric detonator; a magnetic locator is used to locate and calibrate the depth of the monitoring instrument, generate positioning and depth calibration electrical signals and transmit them to the ground. The cable head is used for the transition between the cable and the instrument. It connects the programmable power supply and the processing system via the cable, transmits the voltage of the programmable power supply to the entire monitoring instrument, and transmits the positioning and depth calibration electrical signals to the processing system.

2. The digital monitoring system for downhole explosions caused by loosening of the connection as described in claim 1, characterized in that, The three-dimensional vibration measurement section includes a housing and a measurement and monitoring instrument core; the measurement and monitoring instrument core includes a main control board, a DC-DC power supply circuit, and a three-dimensional vibration sensor.

3. The digital monitoring system for downhole explosions caused by loosening of the connection as described in claim 2, characterized in that, The main control board includes a cable head voltage monitoring circuit, a vibration sensor measurement circuit, a main control circuit, a cable drive circuit, and an electronic ignition switch circuit. The vibration sensing and measurement circuit is used to transmit the vibration signal output by the three-dimensional vibration sensor to the amplifier after being blocked by capacitive coupling, and the amplified vibration signal enters the main control circuit. The cable head voltage monitoring circuit is used to measure the actual voltage value applied to the monitoring instrument after the voltage applied from the ground has passed through the cable loss; The cable drive circuit is used to transmit the vibration signals and cable head voltage values ​​collected by the main control board to the ground processing system after Manchester encoding. The electronic ignition switch is used to control the current flow. When the measured cable head voltage is greater than 180V, the circuit to the detonator is turned on, thereby detonating the electric detonator attached to the detonator. When the measured cable head voltage is less than 180V, the circuit to the explosion safety fuse is turned off.

4. The digital monitoring system for downhole explosions caused by loosening of the connection as described in claim 3, characterized in that, The electronic ignition switch is a control circuit of a combination of P-MOS and N-MOS transistors. When the cable head voltage is below 180V, the circuit to the explosion safety trigger is closed; when the cable head voltage is above 180V, the current to the detonator is turned on, the electric detonator is detonated, and the circuit to the explosion safety trigger is automatically turned off after 10 seconds of conduction.

5. The digital monitoring system for downhole explosions caused by loosening of the connection as described in claim 4, characterized in that, The programmable power supply is used to power the detection and monitoring instruments.

6. The digital monitoring system for downhole explosions caused by loosening of the connection as described in claim 5, characterized in that, The processing system includes a signal separation circuit, a signal amplification circuit, a signal decoding circuit, and software; The positioning and depth calibration electrical signals, the encoded vibration signals, and the encoded cable head voltage values ​​are separated by a signal separation circuit, amplified by a signal amplification circuit, and decoded by a signal decoding circuit before being transmitted to the software. The software presents the cable head voltage value measured downhole, the vibration signals of the monitoring instrument in the X, Y, and Z axes, and the positioning and depth calibration electrical signals of the magnetic locator in the form of curves.

7. The digital monitoring system for downhole explosions caused by loosening of the connection as described in claim 6, characterized in that, The three-dimensional vibration sensor is current-type and powered by constant current. Its vibration amplitude is directly proportional to the output current value. The vibration amplitude of the monitoring instrument caused by the explosion impact is calibrated by the magnitude of the output current.

8. A digital monitoring method for downhole explosions caused by loosening of the plug, characterized in that, Based on the operation of the digital monitoring instrument for downhole explosions caused by loosening of the plug as described in any one of 1-7 above, the monitoring method includes: The digital monitoring instrument for the explosion loosening well was sent down into the well using a logging winch. The monitoring instrument is positioned and calibrated by a magnetic locator to obtain positioning and depth calibration electrical signals. Based on the obtained positioning and depth calibration electrical signals, the middle part of the detonating cord wrapped on the explosive rod is aligned with the drill thread. Turn on the programmable power supply, adjust the voltage to 90V, and monitor the operating status of the monitoring instrument in real time through the software of the processing system; Determine the continuity and integrity of the cable and monitoring instruments based on the cable head voltage value displayed by the software; When the monitoring instrument and cable are fully connected, adjust the voltage of the programmable power supply to 180V, which is the detonation voltage of the detonator. The detonator detonates and then the detonating cord is detonated. The detonation status of the electric detonator and detonating cord is determined based on the curve changes displayed by the software; all measured curves are displayed digitally.

9. A digital monitoring device for explosive loosening of well plugs, characterized in that, include: At least one processor; And a memory communicatively connected to at least one of the processors; wherein the memory stores instructions executable by the processor to implement the digital monitoring method for downhole explosions of claim 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that are executed by the computer to implement the digital monitoring method for downhole explosions caused by explosive loosening as described in claim 8.

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