Well control on-duty intelligent guarding monitoring system and method

Abstract

The invention provides a well control on-duty intelligent guarding monitoring system and method. The system comprises an automatic grouting subsystem, an overflow leakage intelligent monitoring module, a sensor state monitoring module and an intelligent interaction terminal. The intelligent overflow leakage monitoring module monitors corresponding overflow leakage judgment indexes according to grouting operation data under different working conditions, and compares the indexes with set judgment standards to determine a monitoring result; in the slurry pump circulation mode, interference factors are eliminated, the slurry pump circulation liquid level is monitored, and judgment indexes are determined; in the grouting pump circulation mode, the theoretical grouting volume is determined by combining drilling tool related data and the influence of the U-shaped pipe effect, the difference value between the theoretical grouting volume and the actual grouting volume serves as a judgment index, and the intelligent interaction terminal outputs a monitoring signal according to an overflow leakage monitoring result; wherein the intelligent overflow leakage monitoring module obtains judgment indexes in different modes under different working conditions; by adopting the scheme, the problems of complicated operation and high false drop rate of the existing monitoring technology can be solved, and intelligent on-duty monitoring is realized.

Description

Technical Field

[0001] This invention relates to the field of well control monitoring technology, and in particular to a well control intelligent on-duty monitoring system and method. Background Technology

[0002] In engineering applications, if overflows and leaks are not detected and dealt with in a timely manner, they can easily develop into accidents such as well blowouts and wellbore collapses. In some areas, they may also be accompanied by hydrogen sulfide gas leaks, causing significant losses to personal safety and property. However, early detection of overflows and timely shut-in of the well can reduce well control risks.

[0003] In traditional drilling processes, personnel such as mud handlers, site workers, and geological logging workers manually inspect the equipment using various methods, measure its performance, and determine drilling fluid performance control schemes based on their professional knowledge. They then adjust the drilling fluid performance through various manual methods, such as adding drilling fluid materials and activating solids control equipment. Furthermore, to ensure well control safety, personnel must be stationed throughout the drilling process to record relevant drilling fluid parameters.

[0004] Therefore, it is evident that around the mud tank area, personnel in multiple positions, primarily mud workers, need to perform tasks such as measuring drilling fluid density, viscosity, and fluid loss; measuring fluid levels in various tanks; determining drilling fluid treatment plans; loading and unloading materials; adding chemicals to the feed funnel; tripping the drill string and grouting; and managing and controlling solids control equipment. In practice, these tasks are complex, demanding, labor-intensive, and require attention to numerous details. Traditional manual methods for measurement, calculation, recording, judgment, and control are inevitably prone to oversights and errors due to limitations in site conditions and the skill level of the personnel, posing safety hazards to drilling operations.

[0005] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a well control intelligent monitoring system. This system overcomes the limitations of existing monitoring technologies, such as complex operation and high false detection rates, achieving intelligent monitoring. The system includes an intelligent overflow / leakage monitoring module that monitors overflow / leakage judgment indicators based on grouting operation data under different working conditions. The overflow / leakage judgment indicators are compared with set judgment standards to determine the monitoring results. In a mud pump circulation mode, interference factors are eliminated to monitor the mud pump circulation level information and determine the overflow / leakage judgment indicators. In a grouting pump circulation mode, combined with drill string data and the influence of the U-tube effect, the theoretical grouting volume data is determined, and the difference between this and the actual grouting volume is used as the overflow / leakage judgment indicator. An intelligent interactive terminal outputs monitoring signals based on the overflow / leakage monitoring results. Preferably, in one embodiment, the system includes:

[0007] Automatic grouting subsystem, overflow and leakage intelligent monitoring module, sensor status monitoring module and intelligent interactive terminal;

[0008] The overflow and leakage intelligent monitoring module is connected to the automatic grouting subsystem and is configured to monitor the overflow and leakage judgment indicators corresponding to different working conditions based on the grouting operation data. The overflow and leakage judgment indicators are compared and analyzed with the set judgment standards to determine the overflow and leakage monitoring results.

[0009] The intelligent interactive terminal outputs a monitoring signal based on the overflow and leakage monitoring results, and the monitoring signal includes monitoring data and a prompt signal.

[0010] Among them, the overflow and leakage intelligent monitoring module uses different methods to obtain overflow and leakage judgment indicators under different working conditions. When the mud pump circulation mode is in operation, the overflow and leakage judgment indicators are determined by accurately locating the working time when overflow and leakage occur by real-time monitoring of the liquid level information related to the mud pump circulation and considering the interference actions that may cause liquid level changes. When the grouting pump circulation mode is in operation, the theoretical grouting volume data is determined based on the drilling fluid displacement principle, the drilling tool related data, and the influence of the U-tube effect in the grouting pump circulation mode. The difference between the theoretical grouting volume and the actual grouting volume is then used as the overflow and leakage judgment indicator for the grouting pump circulation mode.

[0011] Optionally, in one embodiment, the overflow and leakage intelligent monitoring module includes multiple digital level gauges to realize level monitoring of related working tanks under different operating conditions. The related working tanks include one or more of the following: circulation tanks, storage tanks, adhesive tanks, buffer tanks, and metering tanks.

[0012] Furthermore, in one embodiment, the overflow leakage intelligent monitoring module includes multiple sensors to monitor the flow status of pump flushing and pipeline fluids; including the pump flushing of mud pumps, the start / stop status of grouting pumps, and the flow status of fluids in drilling pipelines, grouting pipelines, and return grout pipelines.

[0013] In a preferred embodiment, the sensor status monitoring module is configured to pre-check whether the sensor is functioning properly, including checking whether the sensor reading exceeds the range, whether the sensor reading fluctuates significantly, and whether the sensor reading remains unchanged.

[0014] In one embodiment, the intelligent interactive terminal is an explosion-proof integrated machine, which is installed in the duty room or work area of ​​the engineering site and connected to the overflow leakage intelligent monitoring module and the remote control terminal through corresponding communication function units.

[0015] Furthermore, in one embodiment, during mud pump circulation mode operation, the overflow and leakage intelligent monitoring module accurately locates the overflow and leakage situation by monitoring the liquid level changes of the circulation tank, storage tank, and glue tank, as well as the operating conditions of the vibrating screen, centrifuge, shear pump, and weighting device. Combined with drill bit size and real-time well depth data, and manual maintenance feeding and consumption data, it determines the volume change of the circulation tank pool caused solely by overflow and leakage, which serves as the overflow and leakage judgment index for mud pump circulation mode.

[0016] Optionally, in one embodiment, when the grouting pump operates in circulation mode, the overflow and leakage intelligent monitoring module first calculates the theoretical grouting volume based on the displacement principle, drill string combination data, drill bit position data, and volume parameters of various drill strings. Then, considering the influence of the U-tube effect in the grouting pump circulation mode, it determines the corrected grouting volume calculation value, compares it with the actual grouting volume monitoring value, and performs a difference calculation to determine the overflow and leakage judgment index of the grouting pump circulation mode. When the drilling fluid is returned, the displacement volume of the drill string is compared with the volume of the returned drilling fluid to determine the overflow and leakage judgment index under the drilling conditions.

[0017] Preferably, in one embodiment, when the mud pump is operating in circulation mode, the overflow and leakage intelligent monitoring module accurately locates the overflow and leakage situation, combines the drill bit size and real-time well depth data, and the data on feeding and consumption during manual maintenance, and then considers the impact of liquid level fluctuations caused by the start and stop of the mud pump to determine the volume change of the circulation tank caused only by overflow and leakage as the overflow and leakage judgment index for the mud pump circulation mode.

[0018] Furthermore, in one embodiment, while the intelligent interactive terminal outputs monitoring data and prompt signals, it remotely transmits the monitoring data and prompt signals to the control terminal through the communication function unit, so that the control center and relevant personnel can be informed of the overflow or leakage situation as soon as possible.

[0019] In an optional embodiment, the intelligent interactive terminal is further configured to: when the set conditions are met due to changes in the length of the tripping drill string or the position of the drill bit, the intelligent monitoring system generates a grouting pump control command, which is transmitted to the automatic grouting subsystem to achieve intelligent grouting, maintain the fluid level in the wellbore, and prevent overflow caused by excessively low hydrostatic pressure in the wellbore.

[0020] When grouting is performed during tripping out of the well, if the grouting pump injects more mud than the set amount and there is no mud return from the wellhead, it indicates that leakage has occurred.

[0021] When the level of the drilling fluid returned to the metering tank during drilling reaches the set condition, the intelligent monitoring system generates a grouting pump control command, which is transmitted to the automatic grouting subsystem to pour the drilling fluid from the metering tank into the circulation tank, thus preventing the metering tank from overflowing onto the surface when it is full.

[0022] Based on the application aspects of the system described in any one or more of the above embodiments, the present invention also provides a well control intelligent duty monitoring method, which is applied to the system described in any one or more of the above embodiments.

[0023] Compared with the closest prior art, the present invention also has the following beneficial effects:

[0024] This invention provides a well control intelligent monitoring system and method. The system uses an intelligent overflow and leakage monitoring module to monitor overflow and leakage judgment indicators corresponding to different grouting operation data under various working conditions. The overflow and leakage judgment indicators are compared with set judgment standards to determine the monitoring results. In mud pump circulation mode, interference factors are eliminated to monitor the liquid level information of the circulating mud pump and determine the overflow and leakage judgment indicators. In grouting pump circulation mode, combined with drill string data and the influence of the U-tube effect, the theoretical grouting volume data is determined, and the difference between this and the actual grouting volume is used as the overflow and leakage judgment indicator. Based on the process principles of mud pump circulation and grouting pump circulation, considering infection factors during circulation, intelligent and comprehensive monitoring accurately locates the liquid level and volume changes caused by overflow and leakage factors, using these as judgment indicators. This system reduces operational complexity, improves the reliability of judgment indicators, controls the false detection rate, and enhances the quality of monitoring.

[0025] The intelligent interactive terminal outputs monitoring signals based on the overflow and leakage monitoring results. The monitoring signals include monitoring data and prompt signals. The real-time generation of monitoring data and prompt signals facilitates the control and regulation decisions based on the impact of overflow and leakage factors in the shortest possible time, thereby achieving intelligent monitoring.

[0026] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a well control intelligent duty monitoring system provided in an embodiment of the present invention;

[0029] Figure 2 This is a real-time monitoring interface display diagram of the intelligent monitoring system for well control provided in this embodiment of the invention;

[0030] Figure 3 This is an example diagram of the drilling site structure layout of the well control intelligent duty monitoring system provided in the embodiments of the present invention. Detailed Implementation

[0031] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples. Those skilled in the art will then fully understand how the present invention uses technical means to solve technical problems and achieve technical effects, and will be able to implement the present invention specifically based on the above-described implementation process. It should be noted that, as long as there is no conflict, the various embodiments and features of the present invention can be combined with each other, and the resulting technical solutions are all within the protection scope of the present invention.

[0032] Although the flowchart describes the operations as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. The order of the operations can be rearranged. A process can terminate when its operation is complete, but it may also have additional steps not included in the diagram. A process can correspond to a method, function, procedure, subroutine, subroutine, etc.

[0033] Computer equipment includes user equipment and network equipment. User equipment or clients include, but are not limited to, computers, smartphones, and PDAs (Personal Digital Assistants); network equipment includes, but is not limited to, a single network server, a server group consisting of multiple network servers, or a cloud based on cloud computing consisting of a large number of computers or network servers. Computer equipment can operate independently to implement this invention, or it can connect to a network and implement this invention through interaction with other computer devices within the network. The network in which the computer equipment resides includes, but is not limited to, the Internet, wide area networks (WANs), metropolitan area networks (MANs), local area networks (LANs), and VPN networks.

[0034] The terms “first,” “second,” etc., may be used herein to describe various units, but these units should not be limited by these terms; they are used merely to distinguish one unit from another. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items. When a unit is referred to as “connected” or “coupled” to another unit, it may be directly connected or coupled to said other unit, or there may be intermediate units present.

[0035] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms “a” and “an” as used herein are also intended to include the plural. It should also be understood that the terms “comprising” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, without excluding the presence or addition of one or more other features, integers, steps, operations, units, components, and / or combinations thereof.

[0036] In engineering applications, if overflows and leaks are not detected and dealt with in a timely manner, they can easily develop into accidents such as well blowouts and wellbore collapses. In some areas, they may also be accompanied by hydrogen sulfide gas leaks, causing significant losses to personal safety and property. However, early detection of overflows and timely shut-in of the well can reduce well control risks.

[0037] Drilling fluid plays a crucial role in conventional drilling operations. High-performance drilling fluids are required during construction to carry cuttings from the wellbore and annulus to the surface, cool and lubricate the drill bit and tools, balance formation pressure, and protect the wellbore. In traditional drilling, specialized mud operators are primarily responsible for measuring drilling fluid properties and adjusting them by controlling feedstock and solids control equipment. The drilling rig uses drilling fluid through a drilling circulation system; as one of the eight major systems of a drilling rig, the traditional drilling circulation system includes components such as the drilling pump, surface manifold, mud tank, and mud purification equipment. The mud purification equipment, also known as solids control equipment, includes devices such as vibrating screens, desanders, desilters, and centrifuges to remove inferior solid phases. Solids control equipment is mainly located on the surface of the mud tank.

[0038] In traditional drilling processes, personnel such as mud handlers, site workers, and geological logging workers manually inspect the equipment using various methods, measure its performance, and determine drilling fluid performance control schemes based on their professional knowledge. They then adjust the drilling fluid performance through various manual methods, such as adding drilling fluid materials and activating solids control equipment. Furthermore, to ensure well control safety, personnel must be stationed throughout the drilling process to record relevant drilling fluid parameters.

[0039] In general, the area around the mud tanks involves multiple positions, primarily mud workers, who are responsible for measuring drilling fluid properties such as density, viscosity, and fluid loss; measuring fluid levels in various tanks; determining drilling fluid treatment plans; loading and unloading materials; adding chemicals to the feed funnel; tripping the drill string and grouting; and managing and controlling solids control equipment. In practice, these tasks are complex, demanding, labor-intensive, and require meticulous attention to detail. Traditional manual methods for measurement, calculation, recording, judgment, and control are limited by site conditions and the skill level of the personnel, inevitably leading to oversights and errors, thus posing safety hazards to drilling operations.

[0040] To address the needs of on-site engineering, reduce labor intensity, and improve safety, this invention has conducted relevant research. Focusing on the intelligentization of the circulation system, it not only integrates existing single-point technologies but also rationally explores new technologies. By applying intelligent methods for integrated analysis, decision-making, and control, it has formed an intelligent drilling circulation system solution that integrates intelligent data acquisition, multi-parameter comprehensive decision-making, and automatic equipment control. This achieves comprehensive intelligent management of drilling fluid, enabling automatic parameter acquisition, intelligent status identification, and automatic performance adjustment. It can efficiently identify overflows and leaks occurring throughout the drilling process, accurately calculate overflow and leakage volumes, and automatically generate on-duty reports. It effectively assists or even replaces mud work, which is of great significance for promoting the development of intelligent drilling.

[0041] The structural components, connection methods, and functional principles of the system according to embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Although the logical order of each operation is shown in the description of the system's structural operation, in some cases, the operations shown or described may be performed in a different order than that shown here.

[0042] Example 1

[0043] Figure 1 This diagram illustrates the structure of the intelligent monitoring system for well control provided in Embodiment 1 of the present invention. (Refer to...) Figure 1 It can be seen that the system includes:

[0044] Automatic grouting subsystem, overflow and leakage intelligent monitoring module, sensor status monitoring module and intelligent interactive terminal;

[0045] The overflow and leakage intelligent monitoring module is connected to the automatic grouting subsystem and is configured to monitor the overflow and leakage judgment indicators corresponding to different working conditions based on the grouting operation data. The overflow and leakage judgment indicators are compared and analyzed with the set judgment standards to determine the overflow and leakage monitoring results.

[0046] The intelligent interactive terminal outputs a monitoring signal based on the overflow and leakage monitoring results, and the monitoring signal includes monitoring data and a prompt signal.

[0047] The overflow and leakage intelligent monitoring module uses different methods to obtain overflow and leakage judgment indicators under different working conditions. When operating in mud pump circulation mode, it monitors the liquid level information related to mud pump circulation in real time, considers interference actions that may cause liquid level changes, accurately locates the time when overflow and leakage occur, and determines the overflow and leakage judgment indicators for mud pump circulation mode. When operating in grouting pump circulation mode (also known as metering tank circulation), it determines the theoretical grouting volume data based on the drilling fluid displacement principle, combined with the drilling tool related data and the influence of the U-tube effect under grouting pump circulation mode, and then uses the difference between the theoretical grouting volume and the actual grouting volume as the overflow and leakage judgment indicators for grouting pump circulation mode. When returning drilling fluid, it compares the displacement volume of the drill bit and the volume of the returned drilling fluid to determine the overflow and leakage judgment indicators under drilling conditions.

[0048] The well control intelligent duty monitoring system provided in this embodiment of the invention uses intelligent methods for integrated analysis, decision-making, and control, forming an intelligent drilling circulation system solution that integrates intelligent data acquisition, multi-parameter comprehensive decision-making, and automatic equipment control. It realizes automatic parameter acquisition and intelligent status identification, and plays an auxiliary or even replacement role in mud work.

[0049] The overflow and leakage intelligent monitoring module includes multiple digital level gauges to monitor the level of relevant operating tanks under different working conditions. The relevant operating tanks include one or more of the following: circulation tanks, storage tanks, adhesive tanks, buffer tanks, and metering tanks.

[0050] The overflow and leakage intelligent monitoring module includes multiple sensors to monitor the flow status of pump flushing and pipeline fluids, including the pump flushing of mud pumps, the start and stop status of grouting pumps, and the flow status of fluids in drilling pipelines, grouting pipelines, and return grout pipelines.

[0051] Sensors are installed to collect data for monitoring overflow and leakage under various on-site operating conditions. If there is available data on-site that can be integrated, then that data will be integrated.

[0052] The intelligent interactive terminal is installed in the duty room or work area at the engineering site and is connected to the overflow and leakage intelligent monitoring module and remote control terminal through corresponding communication function units. Considering the needs of on-site data collection, processing, display, operation, and data feedback, an explosion-proof integrated machine is configured in the duty room.

[0053] The intelligent monitoring system integrates, analyzes, and displays the data from the other subsystems, and is responsible for data collection. It mainly integrates the control signals and data from the automatic grouting subsystem, the overflow and leakage intelligent monitoring module, and the sensor status monitoring module. In practical applications, it also provides a user interface, a constant maintenance page, and a real-time monitoring interface for drilling, tripping, and other working conditions.

[0054] The automatic grouting subsystem can control the start and stop of the grouting pump by adjusting the valves. When the drilling starts, the grouting pump draws drilling fluid from the metering tank and pours it into the wellhead along the grouting pipeline. After it is full, it returns to the buffer tank along the guide channel used during drilling and then back to the metering tank. When the drilling starts, the grouting pump pumps the drilling fluid in the metering tank into the circulation tank.

[0055] Considering that the premise for reliable judgment of overflow and leakage is that the sensor is normal, the well control intelligent duty monitoring system is equipped with a sensor status monitoring module to pre-check whether the sensor is normal, including checking whether the sensor reading exceeds the range, whether the sensor reading fluctuates significantly, and whether the sensor reading does not change.

[0056] In practical applications, during the initial installation and configuration, the distribution of tanks, length, width and height, sensor installation height and other data can be maintained through the constant maintenance page. The data sources and transmission methods can be pre-selected and configured, and the network transmission of relevant data can be configured.

[0057] During normal use: ① When changing wells, the well number needs to be maintained; ② When changing drill string assemblies, the drill string assembly information needs to be maintained to obtain the drill string replacement volume data; ③ When there are feeding or slurry discharge operations, the quantity and time should be recorded; ④ The system has a custom volume function, which allows you to select and view the total value of certain tanks; ⑤ The system has report query and curve query functions to view data.

[0058] The real-time monitoring interface is used to display the monitoring data, data curve distribution, and monitoring results corresponding to the operating conditions, such as... Figure 2 As shown, alarm information will appear at the bottom of the page.

[0059] In this embodiment of the invention, the intelligent monitoring system determines the overflow and leakage situation based on two main circulation states: mud pump circulation and grouting pump circulation.

[0060] In drilling operations, including drilling, circulation, and equipment repair without pump interruption, circulation is typically established using a mud pump. In this case, drilling fluid enters the drill pipe from the circulation tank via the drilling pump and pipeline, then enters the annulus from the bottom of the BHA (Bottom Height) area. It then returns upwards along the annulus, exits from the wellhead, and flows along the return pipeline into the buffer tank. After passing through a vibrating screen, it enters the circulation tank. Figure 3 As shown.

[0061] Based on the above process principles, it can be found that many factors can cause changes in the volume of the circulating tank during mud pump circulation. For example, factors that can cause the fluid level to drop include the extension of the open hole section due to drilling footage, normal mud infiltration into the formation, mud being poured out of the circulating tank, drilling fluid not returning at the initial pump start-up, centrifuge removal of solid phase, mud leakage from the vibrating screen, and downhole leakage. Factors that can cause the fluid level to rise include pouring mud into the circulating tank from the outside, adding drilling fluid chemicals, adding weight, adding adhesive, and overflow.

[0062] In practical applications, signals for mud pouring from the circulation tank to the storage tank, from the storage tank to the circulation tank, from the storage tank to the outside, and from the outside to the storage tank are automatically determined by the system. Other signals are determined by analyzing and inputting data. For example, the extension of the open hole section caused by drilling footage is determined by the changes in well depth collected by logging and the input drill bit data. Data on normal mud infiltration into the formation is determined by analyzing and inputting empirical constants, or by summarizing based on inputting historical data. Signals for centrifuge solid removal and vibrating screen mud leakage are determined by analyzing the corresponding input data.

[0063] Therefore, it is necessary to optimize the liquid level monitoring data by adding the values ​​of the aforementioned influencing factors, forming a new set of corrected change value curves that cannot be directly obtained through observation. This corrected change value information can then be used to identify whether overflow or filtration has occurred. For example, the normal change value per minute should be close to 0. If the liquid level continues to rise for a period of time, the change value during that period will be continuously greater than 0. However, if there is feeding data during that period, the feeding amount per minute should be subtracted.

[0064] In order to accurately identify situations where liquid level changes are caused by leakage and overflow, it is necessary to comprehensively consider and eliminate other factors that may cause false alarms for overflow and leakage.

[0065] Therefore, in a preferred embodiment, when the mud pump is operating in circulation mode, the overflow and leakage intelligent monitoring module accurately locates the overflow and leakage situation by monitoring the liquid level changes of the circulation tank, storage tank, and glue tank, as well as the operating conditions of the vibrating screen, centrifuge, shear pump, and weighting device. It analyzes the drilling fluid replenishment volume by combining the drill bit size and real-time well depth data, and considers the feeding and consumption data of manual maintenance, to determine the volume change of the circulation tank pool caused only by overflow and leakage, which is used as the overflow and leakage judgment index for the mud pump circulation mode.

[0066] Considering the volume of the drill bit cutting into the formation, which needs to be replenished with drilling fluid, the total pool volume will decrease. Therefore, the process of analyzing the drilling fluid replenishment volume by combining drill bit size and real-time well depth data includes: calculating the volume of the drill bit cutting into the formation based on the drill bit size, diameter and length, and determining the drilling fluid replenishment volume by combining real-time well depth data, so as to avoid the changes in this part of the drilling fluid from interfering with the changes in the circulation tank volume caused by overflow and leakage.

[0067] Furthermore, considering that the start and stop of the mud pump will cause fluctuations in the liquid level, in a preferred embodiment, when the mud pump is operating in circulation mode, the overflow and leakage intelligent monitoring module accurately locates the overflow and leakage situation. Combining the drill bit size and real-time well depth data, the data on manual feeding and consumption, and also considering the impact of liquid level fluctuations caused by the start and stop of the mud pump, it determines the change in the volume of the circulation tank caused only by overflow and leakage as the overflow and leakage judgment index for the mud pump circulation mode.

[0068] On the other hand, in drilling operations such as tripping, running in, emptying, and equipment repair during pump shutdown, a grouting pump circulation mode is generally used. During tripping and grouting in an empty well, drilling fluid is pumped from the metering tank into the wellhead annulus via the grouting pump and grouting pipeline. Once full, it flows along the return grout pipeline into the buffer tank, bypassing the vibrating screen before entering the metering tank. During running in, the pump does not need to be turned on; the drilling fluid displaced by the drill pipe flows along the return grout pipeline into the buffer tank and then into the metering tank.

[0069] Based on the above-mentioned process principle, when the grouting pump operates in circulation mode, the theoretical grouting volume data is determined based on the drilling fluid displacement principle, relevant drilling data, and the influence of the U-tube effect in the grouting pump circulation mode. The difference between the theoretical grouting volume and the actual grouting volume is then used as the overflow and leakage judgment index of the grouting pump circulation mode.

[0070] In one optional embodiment, when the grouting pump operates in circulation mode, the overflow and leakage intelligent monitoring module first calculates the theoretical grouting volume based on the replacement principle, according to the drill string combination data, drill bit position data, and volume parameters of various drill strings. Then, considering the influence of the U-tube effect in the grouting pump circulation mode, it determines the corrected grouting volume calculation value, compares it with the actual grouting volume monitoring value, performs a difference calculation, and determines the overflow and leakage judgment index of the grouting pump circulation mode.

[0071] Specifically, considering that the metering tank and circulation tank are isolated, theoretically the change in drilling fluid volume in the metering tank should be consistent with the displacement volume of drill pipe during tripping and running. The overflow and leakage intelligent monitoring module mainly calculates the theoretical value V of grouting volume or return volume under ideal conditions based on drill string assembly data, drill bit position data, and volume parameters of various drill strings. 理论 And compared with the actual value V of the liquid level change in the monitoring and metering tank. 实际 Compare the data to make a basic judgment on leakage.

[0072] In the process of calculating the theoretical value of grouting volume or return volume under ideal conditions based on drill string assembly data, drill bit position data, and volume parameters of various drill strings, the product of the unit displacement volume of the drill string at the wellhead and the length of the drill string pulled out calculated from the change in drill bit position is used. The theoretical value V of grouting volume or return volume under ideal conditions is calculated using the following formula based on drill string assembly data, drill bit position data, and volume parameters of various drill strings. 理论 :

[0073] V 理论 =∑V 钻具单位排替体积 ×△L 钻头位置

[0074] In the formula, V 钻具单位排替体积 This represents the unit displacement volume of the drilling tool. Considering that drilling tools are generally a combination of 5-inch and 5.5-inch tools, it is necessary to sum the values ​​in segments; △L 钻头位置 This indicates the length of drill string pulled out due to changes in drill bit position. Before performing correction calculations, a basic overflow assessment is conducted. If there is a significant difference between the theoretical and actual values, a prompt can be given to the site, facilitating the timely initiation of subsequent processes. The following analysis determines whether there is indeed an overflow or leakage. In practical field applications, the timeliness of anomaly alerts is crucial.

[0075] Furthermore, factors such as normal mud infiltration into the formation, piston pulling during tripping, and the U-tube effect caused by the inability to achieve timely balance during tripping and descent can all lead to deviations from the theoretical values ​​in actual operation. Therefore, the system uses a combination of algorithmic and manual corrections to adjust the theoretical values ​​and calculate V. 修正 Therefore, based on the corrected volume value V 修正 Compared with the actual value of grouting V 实际 By conducting comparative analysis and combining the changing trends of multiple grouting and grout return, a comprehensive judgment and accurate alarm can be made on the leakage.

[0076] Typically, each tripping in and out of the drill string is recorded, including the actual number of drill bits tripped in and out and the actual grouting volume. In a preferred embodiment, the actual drill bit position is calculated based on the actual number of drill bits tripped in and out, the actual drill string displacement amount, which is also the amount of grouting to be injected, is determined, and the difference between this and the actual grouting volume is used to obtain the volume correction value.

[0077] In practical applications, based on historical experience data analysis, the total length drilled and V of the drill bit diameter are calculated. 修正 The correlation between them, for example, can be found by fitting a curve formed from multiple sets of safe construction data showing "drill bit position - required grouting volume - actual grouting volume" to determine V. 修正 The upper and lower limits.

[0078] Based on the above operations, V at different drill bit positions can be fitted. 修正 Next, V can be processed by executing the program algorithm. 修正 The factors are applied to the recognition process. When the algorithm runs in real time, V is determined based on the current drill bit position. 修正 Additionally, the overflow or filtration situation is identified based on the corrected grouting volume or return grout volume.

[0079] In this embodiment of the invention, a corresponding early warning strategy is generated by combining the set correction and early warning rules. In the correction and early warning rules, different thresholds can be manually set for different drill bit positions. For example, when the fluctuation is large at the beginning of drilling and grouting, the threshold is set wider, but after drilling 500m, the threshold is set smaller.

[0080] In another preferred embodiment, based on specific construction conditions or construction conditions where overflow or leakage has been confirmed, additional correction values ​​corresponding to changes in drill bit position can be generated as special case correction values ​​or overflow / leakage condition correction values. These correction values ​​are then added to historical data to form a new, fused historical sample data set. This helps provide rich sample reference data, facilitating accurate and reliable calculation results, and can be used for V... 修正 It provides targeted guidance on the upper and lower limits.

[0081] Once an overflow or leakage is detected, the change in liquid level or volume caused by the overflow or leakage is calculated, and a monitoring report is generated as monitoring data. This report is then transmitted to the intelligent interactive terminal, which associates the monitoring data with the corresponding prompt signal and outputs it.

[0082] In an optional embodiment, considering that there may be no technical personnel in the on-site duty room, the intelligent interactive terminal outputs monitoring data and prompt signals, and at the same time, remotely transmits the monitoring data and prompt signals to the control terminal through the communication function unit, so that the control center and relevant personnel can know about the overflow or leakage situation as soon as possible.

[0083] After confirming the occurrence of overflow or leakage, and outputting monitoring data and prompt information, continuous monitoring is carried out. Furthermore, in order to control the impact of overflow or leakage within the shortest possible time, in a preferred embodiment, when the changes in the length of the drill string pulled out or the position of the drill bit reach the set conditions, the intelligent monitoring system generates a grouting pump control command, which is transmitted to the automatic grouting subsystem to realize intelligent grouting, maintain the fluid level in the wellbore, and avoid overflow caused by excessively low hydrostatic pressure in the wellbore.

[0084] When grouting is performed during drilling, if the grouting pump injects more mud than the set amount and there is no mud return to the wellhead, for example, if there is no mud return to the wellhead for a set time period, it indicates that leakage has occurred.

[0085] When the level of the drilling fluid returned to the metering tank during drilling reaches the set condition, the intelligent monitoring system generates a grouting pump control command, which is transmitted to the automatic grouting subsystem to pour the drilling fluid from the metering tank into the circulation tank, thus preventing the metering tank from overflowing onto the surface when it is full.

[0086] When the change in liquid level or volume caused by overflow or leakage reaches the set conditions, the intelligent monitoring system generates a real-time rescue control command, which is transmitted to the automatic grouting subsystem to achieve basic intelligent regulation and avoid more serious consequences, while continuously monitoring.

[0087] In the well control intelligent duty monitoring system provided in this embodiment of the invention, each module or unit structure can operate independently or in combination according to actual information monitoring needs and data processing needs, so as to achieve the corresponding technical effects.

[0088] Example 2

[0089] The above-described embodiments of the present invention have provided a detailed description of the system. Based on other aspects of the system described in any one or more of the above embodiments, the present invention also provides a well control intelligent duty monitoring method, which is applied to the well control intelligent duty monitoring system described in any one or more of the above embodiments. Specific embodiments are given below for detailed description.

[0090] Specifically, the well control intelligent monitoring method provided in this embodiment of the invention includes:

[0091] The overflow and leakage intelligent monitoring module monitors the overflow and leakage judgment indicators corresponding to different working conditions based on grouting operation data. The overflow and leakage judgment indicators are compared and analyzed with the set judgment standards to determine the overflow and leakage monitoring results.

[0092] The intelligent interactive terminal outputs a monitoring signal based on the overflow and leakage monitoring results. The monitoring signal includes monitoring data and a prompt signal.

[0093] In the process of monitoring overflow and leakage judgment indicators corresponding to different operating conditions, the intelligent overflow and leakage monitoring module uses different methods to obtain the overflow and leakage judgment indicators under different operating conditions; including:

[0094] When the mud pump is operating in circulation mode, by monitoring the liquid level information related to the mud pump circulation in real time, considering the interference actions that may cause changes in liquid level, the timing of overflow and leakage is accurately located, and the overflow and leakage judgment index of the mud pump circulation mode is determined.

[0095] When the grouting pump operates in circulation mode, based on the drilling fluid displacement principle and the relevant data of the drilling tools, combined with the influence of the U-tube effect in the grouting pump circulation mode, the theoretical grouting volume data is determined, and then the difference between the theoretical grouting volume and the actual grouting volume is used as the overflow and leakage judgment index of the grouting pump circulation mode.

[0096] The well control intelligent duty monitoring method described in this embodiment of the invention is applied to a well control intelligent duty monitoring system, the system comprising:

[0097] Automatic grouting subsystem, overflow and leakage intelligent monitoring module, sensor status monitoring module and intelligent interactive terminal;

[0098] The overflow and leakage intelligent monitoring module is connected to the automatic grouting subsystem and is configured to monitor the overflow and leakage judgment indicators corresponding to different working conditions based on the grouting operation data. The overflow and leakage judgment indicators are compared and analyzed with the set judgment standards to determine the overflow and leakage monitoring results.

[0099] The intelligent interactive terminal outputs a monitoring signal based on the overflow and leakage monitoring results, and the monitoring signal includes monitoring data and a prompt signal.

[0100] Among them, the overflow and leakage intelligent monitoring module uses different methods to obtain overflow and leakage judgment indicators under different working conditions. When the mud pump circulation mode is in operation, the overflow and leakage judgment indicators are determined by accurately locating the working time when overflow and leakage occur by real-time monitoring of the liquid level information related to the mud pump circulation and considering the interference actions that may cause liquid level changes. When the grouting pump circulation mode is in operation, the theoretical grouting volume data is determined based on the drilling fluid displacement principle, the drilling tool related data, and the influence of the U-tube effect in the grouting pump circulation mode. The difference between the theoretical grouting volume and the actual grouting volume is then used as the overflow and leakage judgment indicator for the grouting pump circulation mode.

[0101] Optionally, in one embodiment, the overflow and leakage intelligent monitoring module includes multiple digital level gauges to realize level monitoring of related working tanks under different operating conditions. The related working tanks include one or more of the following: circulation tanks, storage tanks, adhesive tanks, buffer tanks, and metering tanks.

[0102] Furthermore, in one embodiment, the overflow leakage intelligent monitoring module includes multiple sensors to monitor the flow status of pump flushing and pipeline fluids; including the pump flushing of mud pumps, the start / stop status of grouting pumps, and the flow status of fluids in drilling pipelines, grouting pipelines, and return grout pipelines.

[0103] In a preferred embodiment, the sensor status monitoring module is configured to pre-check whether the sensor is functioning properly, including checking whether the sensor reading exceeds the range, whether the sensor reading fluctuates significantly, and whether the sensor reading remains unchanged.

[0104] In one embodiment, the intelligent interactive terminal is an explosion-proof integrated machine, which is installed in the duty room or work area of ​​the engineering site and connected to the overflow leakage intelligent monitoring module and the remote control terminal through corresponding communication function units.

[0105] Furthermore, in one embodiment, during mud pump circulation mode operation, the overflow and leakage intelligent monitoring module accurately locates the overflow and leakage situation by monitoring the liquid level changes of the circulation tank, storage tank, and glue tank, as well as the operating conditions of the vibrating screen, centrifuge, shear pump, and weighting device. Combined with drill bit size and real-time well depth data, and manual maintenance feeding and consumption data, it determines the volume change of the circulation tank pool caused solely by overflow and leakage, which serves as the overflow and leakage judgment index for mud pump circulation mode.

[0106] Optionally, in one embodiment, when the grouting pump operates in circulation mode, the overflow and leakage intelligent monitoring module first calculates the theoretical grouting volume based on the displacement principle, drill string combination data, drill bit position data, and volume parameters of various drill strings. Then, considering the influence of the U-tube effect in the grouting pump circulation mode, it determines the corrected grouting volume calculation value, compares it with the actual grouting volume monitoring value, and performs a difference calculation to determine the overflow and leakage judgment index of the grouting pump circulation mode. When the drilling fluid is returned, the displacement volume of the drill string is compared with the volume of the returned drilling fluid to determine the overflow and leakage judgment index under the drilling conditions.

[0107] Preferably, in one embodiment, when the mud pump is operating in circulation mode, the overflow and leakage intelligent monitoring module accurately locates the overflow and leakage situation, combines the drill bit size and real-time well depth data, and the data on feeding and consumption during manual maintenance, and then considers the impact of liquid level fluctuations caused by the start and stop of the mud pump to determine the volume change of the circulation tank caused only by overflow and leakage as the overflow and leakage judgment index for the mud pump circulation mode.

[0108] Furthermore, in one embodiment, while the intelligent interactive terminal outputs monitoring data and prompt signals, it remotely transmits the monitoring data and prompt signals to the control terminal through the communication function unit, so that the control center and relevant personnel can be informed of the overflow or leakage situation as soon as possible.

[0109] In an optional embodiment, the intelligent interactive terminal is further configured to: when the set conditions are met due to changes in the length of the tripping drill string or the position of the drill bit, the intelligent monitoring system generates a grouting pump control command, which is transmitted to the automatic grouting subsystem to achieve intelligent grouting, maintain the fluid level in the wellbore, and prevent overflow caused by excessively low hydrostatic pressure in the wellbore.

[0110] When grouting is initiated, if the grouting pump injects more mud than the set amount and no mud returns to the wellhead, it indicates that leakage has occurred.

[0111] When the level of the drilling fluid returned to the metering tank during drilling reaches the set condition, the intelligent monitoring system generates a grouting pump control command, which is transmitted to the automatic grouting subsystem to pour the drilling fluid from the metering tank into the circulation tank, thus preventing the metering tank from overflowing onto the surface when it is full.

[0112] For the foregoing method embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0113] It should be noted that, in other embodiments of the present invention, the method can also be combined with one or more of the above embodiments to obtain a new intelligent monitoring method for well control, so as to realize intelligent monitoring of drilling projects.

[0114] Example 3

[0115] It should be noted that, based on the methods in any one or more embodiments of the present invention described above, the present invention also provides a storage medium storing program code that can implement the methods described in any one or more embodiments. When the program code is executed by the operating system, it can implement the well control on-duty intelligent monitoring method as described above.

[0116] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0117] The phrase "an embodiment" in the specification means that a specific feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0118] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A well control intelligent on-duty monitoring system, characterized in that, The system includes: Automatic grouting subsystem, overflow and leakage intelligent monitoring module, sensor status monitoring module and intelligent interactive terminal; The overflow and leakage intelligent monitoring module is connected to the automatic grouting subsystem and is configured to monitor the overflow and leakage judgment indicators corresponding to different working conditions based on the grouting operation data. The overflow and leakage judgment indicators are compared and analyzed with the set judgment standards to determine the overflow and leakage monitoring results. The intelligent interactive terminal outputs a monitoring signal based on the overflow and leakage monitoring results, and the monitoring signal includes monitoring data and a prompt signal. Among them, the overflow and leakage intelligent monitoring module uses different methods to obtain overflow and leakage judgment indicators under different working conditions. When the mud pump circulation mode is in operation, the overflow and leakage judgment indicators are determined by accurately locating the working time when overflow and leakage occur by real-time monitoring of the liquid level information related to the mud pump circulation and considering the interference actions that may cause liquid level changes. When the grouting pump circulation mode is in operation, the theoretical grouting volume data is determined based on the drilling fluid displacement principle, the drilling tool related data, and the influence of the U-tube effect in the grouting pump circulation mode. The difference between the theoretical grouting volume and the actual grouting volume is then used as the overflow and leakage judgment indicator for the grouting pump circulation mode.

2. The system according to claim 1, characterized in that, The overflow and leakage intelligent monitoring module includes multiple digital level gauges to monitor the level of relevant operating tanks under different working conditions. The relevant operating tanks include one or more of the following: circulation tanks, storage tanks, adhesive tanks, buffer tanks, and metering tanks.

3. The system according to claim 1, characterized in that, The overflow and leakage intelligent monitoring module includes multiple sensors to monitor the flow status of pump flushing and pipeline fluids, including the pump flushing of mud pumps, the start and stop status of grouting pumps, and the flow status of fluids in drilling pipelines, grouting pipelines, and return grout pipelines.

4. The system according to claim 1, characterized in that, The sensor status monitoring module is configured to pre-check whether the sensor is normal, including checking whether the sensor reading is out of range, whether the sensor reading fluctuates significantly, and whether the sensor reading does not change.

5. The system according to claim 1, characterized in that, The intelligent interactive terminal is an explosion-proof integrated machine, which is installed in the duty room or work area of ​​the engineering site, and is connected to the overflow leakage intelligent monitoring module and remote control terminal through the corresponding communication function unit.

6. The system according to claim 1, characterized in that, When the mud pump is operating in circulation mode, the overflow and leakage intelligent monitoring module accurately locates the overflow and leakage situation by monitoring the liquid level changes of the circulation tank, storage tank, and glue tank, as well as the operating conditions of the vibrating screen, centrifuge, shear pump, and weighting device. Combined with drill bit size and real-time well depth data, as well as manual maintenance feeding and consumption data, it determines the volume change of the circulation tank pool caused solely by overflow or leakage, which serves as the overflow and leakage judgment index for the mud pump circulation mode.

7. The system according to claim 1, characterized in that, When the grouting pump operates in circulation mode, the overflow and leakage intelligent monitoring module first calculates the theoretical grouting volume based on the displacement principle, drill string assembly data, drill bit position data, and volume parameters of various drill strings. Then, considering the influence of the U-tube effect in the grouting pump circulation mode, it determines the corrected grouting volume calculation value, compares it with the actual grouting volume monitoring value, and performs a difference calculation to determine the overflow and leakage judgment index of the grouting pump circulation mode. When the drilling fluid is returned, the displacement volume of the drill string is compared with the volume of the returned drilling fluid to determine the overflow and leakage judgment index under the drilling conditions.

8. The system according to claim 1 or 6, characterized in that, When the mud pump is operating in circulation mode, the overflow and leakage intelligent monitoring module accurately locates the overflow and leakage situation. Combining the drill bit size and real-time well depth data, as well as the data on feeding and consumption during manual maintenance, it further considers the impact of liquid level fluctuations caused by the start and stop of the mud pump and determines that the volume change of the circulation tank caused only by overflow and leakage is used as the overflow and leakage judgment index for the mud pump circulation mode.

9. The system according to claim 1, characterized in that, While the intelligent interactive terminal outputs monitoring data and prompt signals, it also remotely transmits the monitoring data and prompt signals to the control terminal through the communication function unit, so that the control center and relevant personnel can be informed of any overflow or leakage situation as soon as possible.

10. The system according to claim 1, characterized in that, The intelligent interactive terminal is also configured to: when the set conditions are met due to changes in the length of the drilling tool or the position of the drill bit, the intelligent monitoring system generates a grouting pump control command and transmits it to the automatic grouting subsystem to realize intelligent grouting, maintain the fluid level in the wellbore, and avoid overflow caused by excessively low static fluid column pressure in the wellbore. When grouting is performed during tripping out of the well, if the grouting pump injects more mud than the set amount and there is no mud return from the wellhead, it indicates that leakage has occurred. When the level of the drilling fluid returned to the metering tank during drilling reaches the set condition, the intelligent monitoring system generates a grouting pump control command, which is transmitted to the automatic grouting subsystem to pour the drilling fluid from the metering tank into the circulation tank, thus preventing the metering tank from overflowing onto the surface when it is full.

11. A method for intelligent monitoring and duty management of well control systems, characterized in that, The method is applied to the system according to any one of claims 1 to 10; the method includes: The overflow and leakage intelligent monitoring module monitors the overflow and leakage judgment indicators corresponding to different working conditions based on grouting operation data. The overflow and leakage judgment indicators are compared and analyzed with the set judgment standards to determine the overflow and leakage monitoring results. The intelligent interactive terminal outputs a monitoring signal based on the overflow and leakage monitoring results. The monitoring signal includes monitoring data and a prompt signal. In the process of monitoring overflow and leakage judgment indicators corresponding to different operating conditions, the intelligent overflow and leakage monitoring module uses different methods to obtain the overflow and leakage judgment indicators under different operating conditions; including: When the mud pump is operating in circulation mode, by monitoring the liquid level information related to the mud pump circulation in real time, considering the interference actions that may cause changes in liquid level, the timing of overflow and leakage is accurately located, and the overflow and leakage judgment index of the mud pump circulation mode is determined. When the grouting pump operates in circulation mode, based on the drilling fluid displacement principle and the relevant data of the drilling tools, combined with the influence of the U-tube effect in the grouting pump circulation mode, the theoretical grouting volume data is determined, and then the difference between the theoretical grouting volume and the actual grouting volume is used as the overflow and leakage judgment index of the grouting pump circulation mode.

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