Method, device and equipment for detecting setting state of bridge plug setting tool and medium

Abstract

The invention discloses a bridge plug setting tool setting state detection method, device and equipment and a medium, and relates to the technical field of petroleum engineering. The method comprises the steps that when an underground system reaches a preset bridge plug setting layer position, pressure recording is conducted on underground external pressure based on a received underground pressure monitoring instruction; the first pressure data is fed back to the ground system; an ignition instruction sent by the ground system is received, the bridge plug setting tool is controlled to conduct ignition operation according to the ignition instruction verified to be qualified, second pressure data of the gunpowder chamber pressure in the ignition process of the bridge plug setting tool is monitored and recorded, and a pressure change curve is obtained; calculating a pressure curve characteristic value through a ground system based on the first pressure data and the pressure change curve, judging whether the pressure curve characteristic value is equal to a theoretical pressure calculation value or not, and obtaining a bridge plug setting result that the bridge plug is completely set or not according to a judgment result and the pressure change curve. The detection of the setting state of the bridge plug setting tool is realized.

Description

Technical Field

[0001] This invention relates to the field of petroleum engineering technology, and in particular to a method, apparatus, equipment and medium for detecting the setting status of bridge plug setting tools. Background Technology

[0002] Horizontal well pumped bridge plug staged perforation combined with fracturing stimulation has shortened the well completion cycle and become an essential technical means for increasing production in unconventional oil and gas exploration and development. Currently, the method for detecting the setting status of explosive bridge plug setting tools is to comprehensively judge the setting status by recording and comparing the tension difference of the winch panel before and after bridge plug setting, the wellhead operator touching the cable creep, and vibration signal detection.

[0003] With the development of unconventional oil and gas development, due to diverse geological structures and limited surface construction conditions, multi-stage, high-angle, and long-range directional drilling techniques are frequently used. In high-angle wells with an inclination greater than 96°, to prevent the tool string from shifting downwards, a small-volume injection of kill fluid is usually used. This often results in issues such as no tension difference before and after bridge plug setting, no cable creep, and no vibration signal detected during bridge plug propellant combustion, making it impossible for operators to accurately determine the setting status of the propellant-type bridge plug setting tool.

[0004] In summary, how to accurately determine the setting status of bridge plugs in highly deviated wells, and overcome the inability of operators to determine the setting status during the construction of highly deviated and displaced directional wells, is a technical problem that needs to be solved in this field. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a method, apparatus, equipment, and medium for detecting the setting status of bridge plugs, enabling accurate determination of the setting status in highly deviated wells and overcoming the problem that operators cannot determine the setting status during the construction of highly deviated and displaced directional wells. The specific solution is as follows:

[0006] In a first aspect, this application discloses a method for detecting the setting status of a bridge plug setting tool, including:

[0007] When the downhole system reaches the preset bridge plug setting position, it records the downhole external pressure based on the received downhole pressure monitoring command to obtain the first pressure data and feeds the first pressure data back to the surface system.

[0008] The system receives an ignition command sent after receiving the first pressure data through the ground system, controls the bridge plug setting tool to perform ignition operation according to the verified ignition command, monitors and records the second pressure data of the propellant chamber pressure during the ignition process of the bridge plug setting tool, obtains a pressure change curve, and feeds the pressure change curve back to the ground system.

[0009] The pressure curve characteristic value is calculated using the ground system based on the first pressure data and the pressure change curve including the pressure inside the propellant chamber. The characteristic value of the pressure curve is then determined to be equal to the theoretical pressure calculation value. Based on the determination result and the pressure change curve, the setting result of the bridge plug (whether it is fully set or not) is obtained, thereby realizing the detection of the setting status of the bridge plug setting tool.

[0010] Optionally, when the downhole system reaches the preset bridge plug setting position, it records the downhole external pressure based on the received downhole pressure monitoring command to obtain first pressure data and feeds the first pressure data back to the surface system, including:

[0011] When the downhole system reaches the preset bridge plug setting position via cable, the surface system sends a downhole pressure monitoring command to the downhole system via the cable. The ASCI-coded control switch in the downhole pressure monitoring sub of the downhole system recognizes the downhole pressure monitoring command and controls the storage pressure probe to record the downhole external pressure to obtain the first pressure data. The first pressure data is then fed back to the surface system via the cable.

[0012] Optionally, receiving the ignition command sent after receiving the first pressure data through the ground system, and controlling the bridge plug setting tool to perform ignition operation according to the verified ignition command, includes:

[0013] The system receives an ignition command sent by the ground system via cable, and uses the ASIC-encoded control switch to identify and verify the ignition command. If the verification is successful, the ASIC-encoded control switch is connected to the electronic detonator, and the electronic detonator is detonated based on the ignition command to achieve bridge plug setting.

[0014] Optionally, the controlled storage pressure probe records the downhole external pressure to obtain first pressure data, including:

[0015] Based on the identified downhole pressure monitoring command, the pressure capture device is activated so that an external trigger in the pressure capture device triggers the storage pressure probe to record the downhole external pressure to obtain the first pressure data.

[0016] Optionally, the monitoring and recording of the second pressure data of the propellant chamber pressure during the ignition of the bridge plug setting tool to obtain a pressure change curve, and feeding the pressure change curve back to the ground system, includes:

[0017] Based on the downhole pressure monitoring command sent by the surface system, the storage pressure probe is controlled to record the second pressure data of the propellant chamber pressure during the bridge plug setting process completed by the bridge plug setting tool ignition. Based on the second pressure data and the corresponding recording time, a pressure change curve is plotted and the pressure change curve is fed back to the surface system.

[0018] Optionally, the step of calculating a pressure curve characteristic value based on the first pressure data and the pressure change curve including the pressure inside the propellant chamber using the ground system, and determining whether the pressure curve characteristic value is equal to the theoretical pressure calculation value, so as to obtain the bridge plug setting result (whether the bridge plug is fully set or not fully set) based on the determination result and the pressure change curve, includes:

[0019] The actual setting thrust generated by the combustion of gunpowder in the gunpowder chamber during the ignition of the bridge plug setting tool is calculated using the ground system and based on the first pressure data and the pressure change curve including the pressure inside the gunpowder chamber.

[0020] Calculate the pressure difference between the actual setting thrust and the theoretical pressure calculation value;

[0021] If the pressure difference is within the preset pressure variation range, then the actual setting thrust is determined to be equal to the theoretical pressure calculation value.

[0022] If the pressure difference is outside the preset pressure variation range, it is determined that the actual setting thrust is not equal to the theoretical pressure calculation value.

[0023] When the pressure determination result is that the actual setting thrust is not equal to the theoretical pressure calculation value, the setting result of the bridge plug that is not fully set is obtained.

[0024] When the pressure determination result is that the actual setting thrust is equal to the theoretical pressure calculation value, it is determined whether the pressure change curve has the curve characteristic of first decreasing and then increasing at the actual setting thrust, so as to obtain the corresponding curve determination result.

[0025] Based on the curve judgment results, the bridge plug setting result is determined as either fully set or incompletely set.

[0026] Optionally, determining the bridge plug setting result (whether the bridge plug is fully set or not fully set) based on the curve judgment result includes:

[0027] If the curve judgment result shows a curve characteristic of first decreasing and then increasing, then the bridge plug setting result of complete setting is obtained.

[0028] If the curve judgment result is that there is no curve feature of first decreasing and then increasing, then the bridge plug setting result of incomplete setting is obtained.

[0029] Secondly, this application discloses a device for detecting the setting status of a bridge plug setting tool, comprising:

[0030] The first data acquisition module is used to record the downhole external pressure based on the received downhole pressure monitoring command when the downhole system reaches the preset bridge plug setting position, so as to obtain the first pressure data and feed the first pressure data back to the surface system.

[0031] The second data acquisition module is used to receive the ignition command sent after receiving the first pressure data through the ground system, and to control the bridge plug setting tool to perform ignition operation according to the ignition command after verification. It monitors and records the second pressure data of the propellant chamber pressure during the ignition process of the bridge plug setting tool to obtain the pressure change curve, and feeds the pressure change curve back to the ground system.

[0032] The setting status judgment module is used to calculate the pressure curve characteristic value through the ground system and based on the first pressure data and the pressure change curve including the pressure in the gunpowder chamber, and to judge whether the pressure curve characteristic value is equal to the theoretical pressure calculation value, so as to obtain the bridge plug setting result of complete setting or incomplete setting according to the judgment result and the pressure change curve, and realize the detection of the setting status of the bridge plug setting tool.

[0033] Thirdly, this application discloses an electronic device, including:

[0034] Memory, used to store computer programs;

[0035] A processor is used to execute the computer program to implement the steps of the aforementioned method for detecting the setting status of a bridge plug setting tool.

[0036] Fourthly, this application discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, it implements the steps of the aforementioned method for detecting the setting state of a bridge plug setting tool.

[0037] As can be seen, this application discloses a method for detecting the setting status of a bridge plug setting tool, comprising: when the downhole system reaches a preset bridge plug setting layer, recording the downhole external pressure based on a received downhole pressure monitoring command to obtain first pressure data and feeding the first pressure data back to the surface system; receiving an ignition command sent after the first pressure data is received through the surface system, controlling the bridge plug setting tool to perform ignition operation according to the verified ignition command, monitoring and recording second pressure data of the propellant chamber pressure during the ignition process of the bridge plug setting tool to obtain a pressure change curve, and feeding the pressure change curve back to the surface system; calculating a pressure curve characteristic value through the surface system based on the first pressure data and the pressure change curve including the propellant chamber pressure, and determining whether the pressure curve characteristic value is equal to the theoretical pressure calculation value, so as to obtain the bridge plug setting result of complete or incomplete setting based on the determination result and the pressure change curve, thereby realizing the detection of the setting status of the bridge plug setting tool. Therefore, by first measuring the downhole external pressure when the downhole system reaches the preset bridge plug setting position to obtain the first pressure data, and then further measuring the second pressure data of the propellant chamber pressure during the ignition operation to obtain the pressure change curve of the second pressure data, the characteristic value of the pressure curve is further determined by the first pressure data and the pressure change curve received by the surface system. Then, the surface system judges whether the characteristic value of the pressure curve and the theoretical pressure calculation value are equal, and judges whether there is a tension difference before and after bridge plug setting based on the judgment result. Based on the judgment result of whether there is a tension difference, the result of the bridge plug setting state can be obtained. This can solve the problem that operators of directional well construction with large inclination and large displacement cannot judge the bridge plug setting state. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0039] Figure 1 This application discloses a flowchart of a method for detecting the setting status of a bridge plug setting tool;

[0040] Figure 2 This is a schematic diagram of a setting status detection structure for a gunpowder-type bridge plug setting tool disclosed in this application;

[0041] Figure 3 This is a schematic diagram of the state structure of the propellant chamber during the ignition process of a propellant chamber bridge plug setting tool disclosed in this application.

[0042] Figure 4This is a pressure change curve diagram inside a cylinder disclosed in this application;

[0043] Figure 5 This is a schematic diagram of a specific structure for detecting the setting status of a gunpowder-type bridge plug setting tool disclosed in this application;

[0044] Figure 6 This is a schematic block diagram of the internal structure connection of a pressure monitoring subsection disclosed in this application;

[0045] Figure 7 This is a schematic block diagram of a pressure signal capture device disclosed in this application;

[0046] Figure 8 This is a schematic diagram of the internal structure of an ASIC disclosed in this application;

[0047] Figure 9 This is a schematic diagram of the setting status detection device for a bridge plug setting tool disclosed in this application;

[0048] Figure 10 This is a structural diagram of an electronic device disclosed in this application. Detailed Implementation

[0049] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0050] Horizontal well pumped bridge plug staged perforation combined with fracturing stimulation has shortened the well completion cycle and become an essential technical means for increasing production in unconventional oil and gas exploration and development. Currently, the method for detecting the setting status of explosive bridge plug setting tools is to comprehensively judge the setting status by recording and comparing the tension difference of the winch panel before and after bridge plug setting, the wellhead operator touching the cable creep, and vibration signal detection.

[0051] With the development of unconventional oil and gas development, due to diverse geological structures and limited surface construction conditions, multi-stage, high-angle, and long-range directional drilling techniques are frequently used. In high-angle wells with an inclination greater than 96°, to prevent the tool string from shifting downwards, a small-volume injection of kill fluid is usually used. This often results in issues such as no tension difference before and after bridge plug setting, no cable creep, and no vibration signal detected during bridge plug propellant combustion, making it impossible for operators to accurately determine the setting status of the propellant-type bridge plug setting tool.

[0052] In existing technologies, when using a gunpowder-type bridge plug setting tool for cable bridge plug installation, a phenomenon exists: the gunpowder burns in the gunpowder chamber of the tool, and when the pressure inside the chamber reaches the release pressure, the bridge plug is set. At the moment of release, the lower piston rod suddenly releases, causing a sudden increase in the volume between the upper cylinder and the upper piston and gunpowder chamber, resulting in a sudden drop in pressure inside the gunpowder chamber. Due to the continuous combustion characteristics of the gunpowder, the pressure inside the cylinder continues to rise linearly until it reaches a certain equilibrium value. However, in horizontal well pumping perforation operations, the wellhead pressure is high. To prevent wellhead pressure leakage, the commonly used Φ8mm single-core cable cannot simultaneously monitor pressure and ignite the perforating gun.

[0053] To address this, the present invention provides a scheme for detecting the setting status of a bridge plug setting tool, which can accurately determine the setting status of the bridge plug in wells with high deflection, overcoming the inability of operators to determine the setting status during the construction of directional wells with high deflection and large displacement.

[0054] Reference Figure 1 As shown, this embodiment of the invention discloses a method for detecting the setting status of a bridge plug setting tool, comprising:

[0055] Step S11: When the downhole system reaches the preset bridge plug setting position, the downhole external pressure is recorded based on the received downhole pressure monitoring command to obtain the first pressure data and the first pressure data is fed back to the surface system.

[0056] In this embodiment, to better address the issue of simultaneously monitoring pressure and igniting the perforating gun, a downhole pressure monitoring sub is used to record the propellant chamber pressure data during the bridge plug setting process. Specifically, a pressure monitoring sub is installed between the propellant-type bridge plug setting tool and the perforating gun to record the propellant chamber pressure data during the bridge plug setting process. The propellant chamber pressure data includes: first pressure data and second pressure data. The process for obtaining the first pressure data is as follows:

[0057] When the downhole system reaches the preset bridge plug setting position via cable, the surface system sends a downhole pressure monitoring command to the downhole system via the cable. The ASCI-coded control switch in the downhole pressure monitoring sub of the downhole system then recognizes the command and controls the storage pressure probe to record the downhole external pressure, obtaining first pressure data. This first pressure data is then fed back to the surface system via the cable. It is understood that, as... Figure 2 As shown, Figure 2This is a setting status detection system for a gunpowder-type bridge plug setting tool, comprising: a surface system 1, a single-core cable 2, and a downhole system 3. Specifically, the surface system 1 communicates and connects to the downhole system 3 via the single-core cable 2. The downhole system 3 is then lowered to the predetermined bridge plug setting layer in the well via the single-core cable 2. The surface system 1 then sends a downhole pressure monitoring command to the downhole system 3 via the single-core cable 2. The ASCI-encoded control switch in the downhole pressure monitoring sub of the downhole system 3 identifies and processes the received downhole pressure monitoring command. After processing, one pin of the ASCI-encoded switch is connected to the pressure detection device. The storage-type pressure probe in the pressure detection device records the downhole external pressure to obtain the first pressure data. After acquiring the first pressure data, the downhole system 3 transmits this first pressure data to the surface system 1 via the single-core cable 2. It is important to note that the first pressure data is the downhole external pressure data before ignition.

[0058] In this embodiment, the process of recording downhole external pressure using a storage-type pressure probe in the pressure detection device to obtain first pressure data includes: activating a pressure capture device based on the identified downhole pressure monitoring command, so that an external trigger in the pressure capture device triggers the storage-type pressure probe to record downhole external pressure, thereby obtaining the first pressure data. It is understood that the pressure detection device includes a pressure signal capture device; therefore, by activating the pressure capture device in the pressure detection device, the external trigger in the pressure capture device further triggers the storage-type pressure probe, thereby recording downhole external pressure to obtain the first pressure data.

[0059] Step S12: Receive the ignition command sent after receiving the first pressure data through the ground system, control the bridge plug setting tool to perform ignition operation according to the ignition command after verification, monitor and record the second pressure data of the propellant chamber pressure during the ignition process of the bridge plug setting tool to obtain the pressure change curve, and feed the pressure change curve back to the ground system.

[0060] In this embodiment, an ignition command sent by the surface system via cable is received. The ASIC-encoded control switch is used to identify and verify the ignition command. If verification is successful, the ASIC-encoded control switch is connected to the electronic detonator, and the electronic detonator is detonated based on the ignition command, achieving bridge plug setting. It can be understood that after the surface system receives the first pressure data, it further sends an ignition command to the downhole system via a single-core cable. The ASIC-encoded control switch in the downhole system identifies and verifies the ignition command. Thus, by identifying and verifying different downhole pressure monitoring commands, ignition commands, and other commands through the ASIC-encoded control switch, it is possible to determine whether the current command is for pressure status monitoring, bridge plug setting ignition, or perforation gun ignition, avoiding abnormal operation steps. After the ignition command is identified and verified by the ASIC-encoded control switch, the ASIC-encoded control switch is connected to the electronic detonator to detonate the electronic detonator based on the ignition command, achieving bridge plug setting. Furthermore, since the current ASIC-encoded control switch only executes the ignition command for the bridge plug setting tool during the monitoring of the bridge plug setting status, it is completely unrelated to the ignition of the perforating gun. Also, due to the ASIC-encoded controller switch's command recognition and verification, the perforating gun will not be accidentally ignited due to an electronic detonator explosion. Then, when the electronic detonator corresponding to the bridge plug setting tool is detonated, the second pressure data of the propellant chamber pressure during the bridge plug setting tool ignition process is monitored and recorded to obtain a pressure change curve, which is then fed back to the ground system via a single-core cable.

[0061] In this embodiment, based on the downhole pressure monitoring command sent by the surface system, a storage pressure probe is controlled to record the second pressure data of the chamber pressure in the propellant during the bridge plug setting process completed by the bridge plug setting tool ignition. A pressure change curve is then plotted based on the second pressure data and the corresponding recording time, and this pressure change curve is fed back to the surface system. It can be understood that after acquiring and recording the second pressure data of the chamber pressure in the propellant during bridge plug setting, a corresponding pressure change curve is formed based on this second pressure data and the corresponding recording time.

[0062] Step S13: Calculate the pressure curve characteristic value using the ground system and based on the first pressure data and the pressure change curve including the pressure inside the propellant chamber, and determine whether the pressure curve characteristic value is equal to the theoretical pressure calculation value. Based on the determination result and the pressure change curve, obtain the bridge plug setting result of whether the bridge plug is fully set or not fully set, and realize the detection of the setting state of the bridge plug setting tool.

[0063] In this embodiment, the actual setting thrust generated by the combustion of gunpowder in the propellant chamber during the ignition of the bridge plug setting tool is calculated using the ground system and based on the first pressure data and the pressure change curve including the pressure inside the propellant chamber. The pressure difference between the actual setting thrust and the theoretical pressure calculation value is calculated. If the pressure difference is within a preset pressure change range, the actual setting thrust is determined to be equal to the theoretical pressure calculation value. If the pressure difference is outside the preset pressure change range, the actual setting thrust is determined to be not equal to the theoretical pressure calculation value. When the pressure determination result is that the actual setting thrust is not equal to the theoretical pressure calculation value, the bridge plug setting result of incomplete setting is obtained. When the pressure determination result is that the actual setting thrust is equal to the theoretical pressure calculation value, it is determined whether the pressure change curve has a curve characteristic of first decreasing and then increasing at the actual setting thrust, so as to obtain the corresponding curve judgment result. Based on the curve judgment result, the bridge plug setting result of complete setting or incomplete setting is determined. Specifically, if the curve determination result shows a curve characteristic of first decreasing and then increasing, then the bridging plug setting result for a fully set bridging plug is obtained; if the curve determination result does not show a curve characteristic of first decreasing and then increasing, then the bridging plug setting result for a partially set bridging plug is obtained. It is understood that, as... Figure 3 As shown, after obtaining the first pressure data (external pressure) and the second pressure data (internal pressure), as well as the corresponding external pressure action surface and internal pressure action surface, the actual setting thrust F_push = P1•A1 - P2•A2. According to the survey results, the combustion of gunpowder in the setting tool can generate a pressure of over 90 MPa, with a measured value of 94.2 MPa. Taking a safety factor of 0.8, we assume P1 = 0.8 × 90 = 72 MPa; d1 and d2 represent the diameter distance between the internal pressure action surface and the external pressure action surface, respectively, where d1 = 76.2 mm and d2 = 28.5 mm. The areas A1 and A2 of the two action surfaces are calculated as follows:

[0064] A1 = π(d1 / 2) 2 =4560.4mm 2 ;

[0065] A² = π(d² / 2) 2 =637.9mm 2 ;

[0066] Without external pressure, F_max = P1•A1 - P2•A2 = 328346.4 N = 33.5 tons (gravity coefficient taken as 9.8 m / s²). 2 );

[0067] If the external pressure is 175MPa (pressure resistance index of seated tools), F_push_min = P1•A1 - P2•A2 = 216707N = 22.1 tons.

[0068] Therefore, the thrust generated by the setting tool ranges from 22.7 to 33.5 tons.

[0069] Based on the structure of the setting tool, when subjected to external pressure downhole, a portion of the power generated by the setting tool will be offset. Theoretically, when the external pressure is much greater than the internal pressure, the setting tool will not move. To ensure that the setting thrust meets the requirements for setting under high pressure, the thrust of the setting tool needs to be calculated. In summary, after obtaining the first pressure data, the second pressure data, and relevant measurement data of the oil well's propellant chamber, the actual setting thrust is determined based on the above calculations. The actual setting thrust is also the characteristic value of the pressure curve. Then, the pressure difference between the actual setting thrust and the theoretical pressure calculation value is calculated. If the pressure difference is within the preset pressure range, the pressure determination result is that the actual setting thrust equals the theoretical pressure calculation value. Further, it is determined whether the pressure change curve shows a curve characteristic of first decreasing and then increasing at the actual setting thrust. If such a curve characteristic exists, the bridge plug is considered fully set; otherwise, the bridge plug is considered incompletely set. If the pressure difference is outside the preset pressure range, the pressure determination result is that the actual setting thrust is not equal to the theoretical pressure calculation value, and the bridge plug is considered incompletely set. The preset pressure range is determined in advance based on the pressure calculation corresponding to historical bridge plug setting results. For example, the bridge plug setting status is determined by comparing the pressure curve characteristic value (actual setting thrust) P0 with the theoretical pressure calculation value P1 and the pressure monitoring curve. Example: A well has a vertical depth h of 3000 meters, a well fluid density ρ of 1.0 g / cm³, a wellhead pressure P of 30 MPa, an upper piston cross-sectional area S:D:76 mm², a lower piston rod cross-sectional area S1:d:28 mm², and a bridge plug breakage ring release value T of 18 tons. Under the condition that the bridge plug is fully set, we have P1×S - (ρ×g×h+P)×S1≥T. Substituting these values ​​into the calculation yields the value of P1. P1 is basically consistent with P0. The pressure monitoring curve shows a clear characteristic of first decreasing and then increasing at P0. See [link to details]. Figure 4 As shown, if the bridge plug is fully set, it indicates that the bridge plug has been completely set; otherwise, the bridge plug is not fully set. It can be seen that the pressure monitoring method provided by this invention sends fixed-address coded command signals through the surface selective firing control panel. The downhole ASIC coded control switch processes, converts, and identifies the fixed-address coded command signals sent by the selective firing control panel. Based on different command instructions, multi-level selective ignition and detonation, as well as pressure monitoring functions within the bridge plug setting tool, are achieved. Compared with existing multi-level selective firing perforation processes, the perforation process is simpler and more intelligent. This process allows for multiple ignition and detonation operations and pressure monitoring during bridge plug setting in a single downhole operation, overcoming the limitations of existing technologies that cannot perform pressure monitoring and greatly improving construction efficiency.

[0070] In this embodiment, after the bridge plug tool setting status detection is completed, and the bridge plug is set, the cable is raised to the predetermined perforation layer. The ground control device continues to send command e to the ASCI coded control switch inside the perforating gun. After recognizing and processing command e, one pin of the coded switch is connected to the electronic detonator. The ground control device sends ignition command c to detonate the electronic detonator corresponding to the perforating gun, thus detonating the perforating gun. This process is repeated to complete the detonation of the remaining perforating guns. This achieves multi-level selective perforation, pressure monitoring inside the bridge plug setting tool, and detection of the bridge plug setting status. It is evident that both hardware and software aspects prevent accidental detonation of the perforating gun during pressure signal acquisition and transmission. In terms of hardware, a voltage threshold identification method is adopted. The foot switch connecting the ASCI coded control switch and the electronic detonator is designed as a 110V threshold switch. This 110V threshold switch signal is a DC voltage signal of no less than 110V provided by the surface control device through a cable. After receiving a DC voltage signal of no less than 110V, further voltage division and stabilization are required in the internal circuit of the ASCI coded control switch before the voltage threshold signal switch can be opened. Only an ignition signal greater than 110V can open the switch, at which point the electronic detonator can receive the ignition signal and initiate the perforation gun ignition. During the pressure signal acquisition process, the DC carrier signal is designed to be below 24V. This ensures that the ASCI coded control switch recognizes the DC carrier signal below 24V as a signal for monitoring the pressure status of the bridge plug setting tool, rather than for the perforation gun ignition, thus avoiding accidental detonation of the perforation gun. Therefore, in terms of software, an coded switch method is adopted. The coded command signal sent from the surface must correspond one-to-one with the address bits of the downhole ASCI coded control switch to open the coded switch.

[0071] like Figure 5 As shown, the method for detecting the setting status of a gunpowder-type bridge plug setting tool includes a structural design comprising: a bridge plug, a bridge plug setting tool, a pressure monitoring sub, perforating guns 1 to n, a CCL sub, a single-core cable, a selectable control panel, and a ground control system consisting of a PC. The pressure monitoring sub includes: a pressure detection device and an ASIC-coded control switch. The bridge plug setting tool includes: an ASIC-coded control switch and an electronic detonator. The perforating gun includes: an ASIC-coded control switch and an electronic detonator.

[0072] The PC connects to the optional control panel via USB to process signals uploaded from the downhole system.

[0073] The optional control panel is connected to the CCL short section via a single-core cable, sending commands to the entire downhole system and receiving signals uploaded by the downhole system.

[0074] The ASIC-encoded control switches each have their own independent encoding and identification address. They identify, process, and convert the fixed-address encoding signals sent by the selective control panel to realize functions such as bridge plug tool setting and ignition, setting tool internal pressure monitoring, and perforation gun ignition.

[0075] The perforation gun is equipped with an ASIC-coded control switch and an electronic detonator. The upper end of the perforation gun connects to the CCL short section, and the lower end connects to the pressure monitoring short section. The connection is made by a threaded connection and sealed by a sealing ring. The internal through-wire is connected by a wire with a special sealing structure.

[0076] The pressure monitoring sub is equipped with an ASIC-coded control switch and a pressure detection device. The upper end of the pressure monitoring sub connects to the perforation gun, and the lower end connects to the bridge plug setting tool. The connection is made by a threaded connection and sealed by a sealing ring. The internal through-wire is connected by a wire with a special sealing structure. The pressure detection device is connected to the ASIC-coded control switch by one pin.

[0077] The pressure detection device includes a power supply module, a communication module, a storage module, and a pressure signal acquisition device. The power supply module and communication module are high-temperature and high-pressure resistant circuit modules, and the pressure signal acquisition device is a high-sensitivity pressure sensing circuit that acquires pressure information from the propellant chamber of the bridge plug setting tool.

[0078] The bridge plug setting tool is equipped with an ASIC-coded control switch and an electronic detonator. The upper end of the bridge plug setting tool is connected to the pressure monitoring sub-section via a threaded connection and a sealing ring. The internal through-wire is connected via a wire with a special sealing structure. The electronic detonator is connected to the ASIC-coded control switch at one pin.

[0079] The wire has sockets at both ends; the upper socket connects to a sealing pin, and the lower socket connects to a flexible contact pin.

[0080] The ASIC-encoded control switch uses a 16-bit identification code + 8-bit address code. One pin of the switch is connected to the ASIC-encoded control switch in the previous unit, and the other pin is connected to the electronic detonator or pressure detection device. The switch automatically switches according to the encoded instructions to complete the functions of ignition and detonation and pressure monitoring.

[0081] The pressure sensor is a high-precision, high-temperature and high-pressure resistant electronic device, which is fixed to the upper end of the ignition head of the bridge plug setting tool.

[0082] The circuit modules are high-strength, high-temperature resistant electronic circuits, which are fixed inside each control unit.

[0083] Specifically, such as Figure 6As shown, the downhole control system consists of a bridge plug setting tool, a pressure monitoring sub, a perforating gun, and a magnetic positioning sub; the surface control system consists of a selectable control panel and a PC. The DC carrier coded signal sent by the surface control system is transmitted down through a single-core cable to the ASIC coded switches inside the bridge plug setting tool, pressure monitoring sub, and perforating gun. The signal acquisition device within the ASIC coded switch identifies, processes, and converts the specific DC carrier coded signal, and feeds the corresponding information back to the surface control panel. For example: upon receiving a bridge plug ignition command, the coded control switch inside the bridge plug setting tool is opened to ignite the tool; upon receiving a pressure monitoring command, the coded control switch inside the pressure monitoring sub is opened to monitor the pressure inside the bridge plug setting tool's propellant chamber; upon receiving a perforating gun ignition command, the coded control switch inside the perforating gun is opened to ignite the gun, and so on, sequentially completing the ignition operations of all perforating guns, thereby achieving multi-stage selectable perforation and pressure monitoring within the bridge plug setting tool.

[0084] like Figure 7 As shown, the pressure detection device includes a power supply module, a communication module, a storage module, a pressure signal acquisition device, a control module (MCU), and an ASIC-encoded control switch. The MCU receives and processes data transmitted from the pressure signal acquisition device and simultaneously sends control commands to the power supply module. The storage module temporarily stores the data collected by the pressure signal acquisition device. The ASIC-encoded control switch receives relevant instructions from the ground system.

[0085] like Figure 8 As shown, the pressure capture device includes a control module (MCU), a pressure sensor, an amplifier circuit, a filter circuit, a voltage comparator, an A / D converter, a power conversion module, a power supply, and an external trigger signal. The amplifier and filter circuits process the voltage transmitted from the pressure sensor. The A / D converter converts the processed analog signal into a digital signal that the control module (MCU) within the control section can recognize. The external trigger activates the storage-type pressure gauge. The power supply and power conversion module provide power to the control module (MCU) and the pressure sensor.

[0086] As can be seen, this application discloses a method for detecting the setting status of a bridge plug setting tool, comprising: when the downhole system reaches a preset bridge plug setting layer, recording the downhole external pressure based on a received downhole pressure monitoring command to obtain first pressure data and feeding the first pressure data back to the surface system; receiving an ignition command sent after the first pressure data is received through the surface system, controlling the bridge plug setting tool to perform ignition operation according to the verified ignition command, monitoring and recording second pressure data of the propellant chamber pressure during the ignition process of the bridge plug setting tool to obtain a pressure change curve, and feeding the pressure change curve back to the surface system; calculating a pressure curve characteristic value through the surface system based on the first pressure data and the pressure change curve including the propellant chamber pressure, and determining whether the pressure curve characteristic value is equal to the theoretical pressure calculation value, so as to obtain the bridge plug setting result of complete or incomplete setting based on the determination result and the pressure change curve, thereby realizing the detection of the setting status of the bridge plug setting tool. Therefore, by first measuring the downhole external pressure when the downhole system reaches the preset bridge plug setting position to obtain the first pressure data, and then further measuring the second pressure data of the propellant chamber pressure during the ignition operation to obtain the pressure change curve of the second pressure data, the characteristic value of the pressure curve is further determined by the first pressure data and the pressure change curve received by the surface system. Then, the surface system judges whether the characteristic value of the pressure curve and the theoretical pressure calculation value are equal, and judges whether there is a tension difference before and after bridge plug setting based on the judgment result. Based on the judgment result of whether there is a tension difference, the result of the bridge plug setting state can be obtained. This can solve the problem that operators of directional well construction with large inclination and large displacement cannot judge the bridge plug setting state.

[0087] Reference Figure 9 As shown, the present invention also discloses a device for detecting the setting status of a bridge plug setting tool, comprising:

[0088] The first data acquisition module 11 is used to record the downhole external pressure based on the received downhole pressure monitoring command when the downhole system reaches the preset bridge plug setting position, so as to obtain the first pressure data and feed the first pressure data back to the surface system.

[0089] The second data acquisition module 12 is used to receive the ignition command sent after receiving the first pressure data through the ground system, to control the bridge plug setting tool to perform ignition operation according to the ignition command after verification, to monitor and record the second pressure data of the propellant chamber pressure during the ignition process of the bridge plug setting tool, to obtain the pressure change curve, and to feed the pressure change curve back to the ground system.

[0090] The setting status judgment module 13 is used to calculate the pressure curve characteristic value through the ground system and based on the first pressure data and the pressure change curve including the pressure in the gunpowder chamber, and to judge whether the pressure curve characteristic value is equal to the theoretical pressure calculation value, so as to obtain the bridge plug setting result of complete setting or incomplete setting according to the judgment result and the pressure change curve, and realize the detection of the setting status of the bridge plug setting tool.

[0091] As can be seen, this application discloses that when the downhole system reaches the preset bridge plug setting layer, it records the downhole external pressure based on the received downhole pressure monitoring command to obtain first pressure data and feeds the first pressure data back to the surface system; it receives an ignition command sent by the surface system after receiving the first pressure data, and controls the bridge plug setting tool to perform ignition operation according to the verified ignition command; it monitors and records the second pressure data of the propellant chamber pressure during the ignition process of the bridge plug setting tool to obtain a pressure change curve, and feeds the pressure change curve back to the surface system; it calculates the pressure curve characteristic value through the surface system based on the first pressure data and the pressure change curve including the propellant chamber pressure, and determines whether the pressure curve characteristic value is equal to the theoretical pressure calculation value, so as to obtain the bridge plug setting result of complete or incomplete bridge plug setting according to the judgment result and the pressure change curve, thereby realizing the detection of the setting state of the bridge plug setting tool. Therefore, by first measuring the downhole external pressure when the downhole system reaches the preset bridge plug setting position to obtain the first pressure data, and then further measuring the second pressure data of the propellant chamber pressure during the ignition operation to obtain the pressure change curve of the second pressure data, the characteristic value of the pressure curve is further determined by the first pressure data and the pressure change curve received by the surface system. Then, the surface system judges whether the characteristic value of the pressure curve and the theoretical pressure calculation value are equal, and judges whether there is a tension difference before and after bridge plug setting based on the judgment result. Based on the judgment result of whether there is a tension difference, the result of the bridge plug setting state can be obtained. This can solve the problem that operators of directional well construction with large inclination and large displacement cannot judge the bridge plug setting state.

[0092] Furthermore, embodiments of this application also disclose an electronic device, Figure 10 This is a structural diagram of an electronic device 20 according to an exemplary embodiment. The content of the diagram should not be construed as limiting the scope of this application.

[0093] Figure 10This is a schematic diagram of the structure of an electronic device 20 provided in an embodiment of this application. Specifically, the electronic device 20 may include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25, and a communication bus 26. The memory 22 stores a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the bridge plug setting tool setting state detection method disclosed in any of the foregoing embodiments. Alternatively, the electronic device 20 in this embodiment may specifically be an electronic computer.

[0094] In this embodiment, the power supply 23 is used to provide operating voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and external devices, and the communication protocol it follows can be any communication protocol applicable to the technical solution of this application, and is not specifically limited here; the input / output interface 25 is used to acquire external input data or output data to the outside world, and its specific interface type can be selected according to specific application needs, and is not specifically limited here.

[0095] The processor 21 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 21 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 21 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 21 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 21 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0096] In addition, the memory 22, as a carrier for resource storage, can be a read-only memory, random access memory, disk or optical disk, etc. The resources stored thereon can include operating system 221, computer program 222, etc., and the storage method can be temporary storage or permanent storage.

[0097] The operating system 221 manages and controls the various hardware devices and computer programs 222 on the electronic device 20 to enable the processor 21 to perform calculations and processing on the massive amounts of data 223 in the memory 22. It can be Windows Server, Netware, Unix, Linux, etc. The computer program 222, in addition to including a computer program capable of performing the bridge plug setting tool setting status detection method executed by the electronic device 20 as disclosed in any of the foregoing embodiments, may further include computer programs capable of performing other specific tasks. The data 223 may include data received by the electronic device from external devices, as well as data collected by its own input / output interface 25.

[0098] Furthermore, this application also discloses a computer-readable storage medium for storing a computer program; wherein, when the computer program is executed by a processor, it implements the aforementioned method for detecting the setting state of a bridge plug setting tool. Specific steps of this method can be found in the corresponding content disclosed in the foregoing embodiments, and will not be repeated here.

[0099] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0100] Those skilled in the art will further recognize that the units and algorithm 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. To clearly illustrate the interchangeability of 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 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 this application. The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented directly in hardware, software modules executed by a processor, or a combination of both. The software module may be located in random access memory (RAM), memory, read-only memory (ROM), electrically programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, removable disks, CD-ROMs (Compact Disc-Read Only Memory), or any other form of storage medium known in the art.

[0101] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0102] The solution provided by the present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for detecting the setting state of a bridge plug setting tool, characterized in that, include: When the downhole system reaches the preset bridge plug setting position, it records the downhole external pressure based on the received downhole pressure monitoring command to obtain the first pressure data and feeds the first pressure data back to the surface system. The system receives an ignition command sent after receiving the first pressure data through the ground system, controls the bridge plug setting tool to perform ignition operation according to the verified ignition command, monitors and records the second pressure data of the propellant chamber pressure during the ignition process of the bridge plug setting tool, obtains a pressure change curve, and feeds the pressure change curve back to the ground system. The pressure curve characteristic value is calculated using the ground system based on the first pressure data and the pressure change curve including the pressure inside the propellant chamber. The characteristic value of the pressure curve is then determined to be equal to the theoretical pressure calculation value. Based on the determination result and the pressure change curve, the setting result of the bridge plug (whether it is fully set or not) is obtained, thereby realizing the detection of the setting status of the bridge plug setting tool.

2. The method for detecting the setting state of the bridge plug setting tool according to claim 1, characterized in that, When the downhole system reaches the preset bridge plug setting position, it records the downhole external pressure based on the received downhole pressure monitoring command to obtain first pressure data and feeds the first pressure data back to the surface system, including: When the downhole system reaches the preset bridge plug setting position via cable, the surface system sends a downhole pressure monitoring command to the downhole system via the cable. The ASCI-coded control switch in the downhole pressure monitoring sub of the downhole system recognizes the downhole pressure monitoring command and controls the storage pressure probe to record the downhole external pressure to obtain the first pressure data. The first pressure data is then fed back to the surface system via the cable.

3. The method for detecting the setting state of the bridge plug setting tool according to claim 2, characterized in that, The receiving of the ignition command sent after receiving the first pressure data through the ground system, and the control of the bridge plug setting tool to perform ignition operation according to the verified ignition command, includes: The system receives an ignition command sent by the ground system via cable, and uses the ASIC-encoded control switch to identify and verify the ignition command. If the verification is successful, the ASIC-encoded control switch is connected to the electronic detonator, and the electronic detonator is detonated based on the ignition command to achieve bridge plug setting.

4. The method for detecting the setting state of the bridge plug setting tool according to claim 2, characterized in that, The controlled storage pressure probe records the downhole external pressure to obtain first pressure data, including: Based on the identified downhole pressure monitoring command, the pressure capture device is activated so that an external trigger in the pressure capture device triggers the storage pressure probe to record the downhole external pressure to obtain the first pressure data.

5. The method for detecting the setting state of the bridge plug setting tool according to claim 1, characterized in that, The monitoring and recording of the second pressure data of the propellant chamber pressure during the ignition of the bridge plug setting tool, to obtain a pressure change curve, and feeding the pressure change curve back to the ground system, includes: Based on the downhole pressure monitoring command sent by the surface system, the storage pressure probe is controlled to record the second pressure data of the propellant chamber pressure during the bridge plug setting process completed by the bridge plug setting tool ignition. Based on the second pressure data and the corresponding recording time, a pressure change curve is plotted and the pressure change curve is fed back to the surface system.

6. The method for detecting the setting state of the bridge plug setting tool according to claim 1, characterized in that, The step of calculating a pressure curve characteristic value based on the first pressure data and the pressure change curve including the pressure inside the propellant chamber using the ground system, and determining whether the pressure curve characteristic value is equal to the theoretical pressure calculation value, so as to obtain the bridge plug setting result (whether the bridge plug is fully set or not fully set) based on the determination result and the pressure change curve, includes: The actual setting thrust generated by the combustion of gunpowder in the gunpowder chamber during the ignition of the bridge plug setting tool is calculated using the ground system and based on the first pressure data and the pressure change curve including the pressure inside the gunpowder chamber. Calculate the pressure difference between the actual setting thrust and the theoretical pressure calculation value; If the pressure difference is within the preset pressure variation range, then the actual seating thrust is determined to be equal to the theoretical pressure calculation value. If the pressure difference is outside the preset pressure variation range, it is determined that the actual setting thrust is not equal to the theoretical pressure calculation value. When the pressure determination result is that the actual setting thrust is not equal to the theoretical pressure calculation value, the setting result of the bridge plug that is not fully set is obtained. When the pressure determination result is that the actual setting thrust is equal to the theoretical pressure calculation value, it is determined whether the pressure change curve has the curve characteristic of first decreasing and then increasing at the actual setting thrust, so as to obtain the corresponding curve determination result. Based on the curve judgment results, the bridge plug setting result is determined as either fully set or incompletely set.

7. The method for detecting the setting state of the bridge plug setting tool according to claim 6, characterized in that, The determination of the bridge plug setting result, whether the bridge plug is fully set or not, based on the curve judgment result, includes: If the curve judgment result shows a curve characteristic of first decreasing and then increasing, then the bridge plug setting result of complete setting is obtained. If the curve judgment result is that there is no curve feature of first decreasing and then increasing, then the bridge plug setting result of incomplete setting is obtained.

8. A device for detecting the setting status of a bridge plug setting tool, characterized in that, include: The first data acquisition module is used to record the downhole external pressure based on the received downhole pressure monitoring command when the downhole system reaches the preset bridge plug setting position, so as to obtain the first pressure data and feed the first pressure data back to the surface system. The second data acquisition module is used to receive the ignition command sent after receiving the first pressure data through the ground system, and to control the bridge plug setting tool to perform ignition operation according to the ignition command after verification. It monitors and records the second pressure data of the propellant chamber pressure during the ignition process of the bridge plug setting tool to obtain the pressure change curve, and feeds the pressure change curve back to the ground system. The setting status judgment module is used to calculate the pressure curve characteristic value through the ground system and based on the first pressure data and the pressure change curve including the pressure in the gunpowder chamber, and to judge whether the pressure curve characteristic value is equal to the theoretical pressure calculation value, so as to obtain the bridge plug setting result of complete setting or incomplete setting according to the judgment result and the pressure change curve, and realize the detection of the setting status of the bridge plug setting tool.

9. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor is configured to execute the computer program to implement the steps of the bridge plug setting tool setting status detection method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, Used to store a computer program; wherein, when the computer program is executed by a processor, it implements the steps of the bridge plug setting tool setting state detection method as described in any one of claims 1 to 7.

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