A method and system for adaptive control of pressurized force, electronic device and storage medium

Abstract

This application discloses a pressure adaptive control method, system, electronic device, and storage medium, belonging to the technical field of engineering machinery technology. The pressure adaptive control method includes: detecting the current operating current value of the electric power head motor through the power head motor controller; if the current operating current value is greater than an upper current threshold, decreasing the downward pressure of the pressurizing cylinder by increasing the control current of the proportional pressure control valve, thereby reducing the target operating parameters; wherein the target operating parameters include cutting depth, power head drilling torque, and power head operating load; if the current operating current value is less than a lower current threshold, increasing the downward pressure of the pressurizing cylinder by decreasing the control current of the proportional pressure control valve, thereby increasing the target operating parameters. This application can improve the operating quality of range-extended rotary drilling rigs.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, and in particular to a pressure adaptive control method, system, electronic device and storage medium. Background Technology

[0002] Range-extended rotary drilling rigs use an electric power head and a pressurized hydraulic cylinder to work together, combining high efficiency and energy saving with precise control, making them suitable for construction in various complex geological formations.

[0003] To ensure stable motor operating current and reduce the impact damage to the main mechanism caused by load fluctuations, the electric power head motor needs to maintain a stable torque. However, due to changes in the operating load, the electric power head of the range-extended rotary drilling rig experiences torque fluctuations during drilling operations, which severely affects the quality of the work.

[0004] Therefore, how to improve the operational quality of range-extended rotary drilling rigs is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a pressure adaptive control method, system, electronic device, and storage medium that can improve the operating quality of range-extended rotary drilling rigs.

[0006] To address the aforementioned technical problems, this application provides a pressure adaptive control method applied to a range-extended rotary drilling rig. The range-extended rotary drilling rig includes an electric power head, a power head motor controller, a pressure cylinder, and a proportional pressure control valve. The power head motor controller controls the motor of the electric power head, and the proportional pressure control valve controls the pressure of the pressure cylinder. The pressure adaptive control method includes:

[0007] The current operating current value of the electric power head is detected by the power head motor controller;

[0008] If the current operating current of the motor is greater than the upper threshold current, the downward pressure of the pressurizing cylinder is reduced by increasing the control current of the proportional pressure control valve, so as to reduce the target operating parameters; wherein, the target operating parameters include cutting depth, drilling torque of the power head, and operating load of the power head;

[0009] If the current operating current of the motor is less than the lower current threshold, the downward pressure of the pressurizing cylinder is increased by reducing the control current of the proportional pressure control valve, so as to increase the target operating parameter.

[0010] Optional, also includes:

[0011] Determine the current geological formation type of the extended-range rotary drilling rig;

[0012] The control current of the proportional pressure control valve is set according to the current geological formation type.

[0013] Optionally, the control current of the proportional pressure control valve can be set according to the current formation type, including:

[0014] If the current working stratum is a soft rock layer or a sand layer, the control current of the proportional pressure control valve is kept at a preset value until the current working stratum changes or the operation is completed; wherein, the preset value is less than the maximum current value of the motor.

[0015] Optionally, the control current of the proportional pressure control valve can be set according to the current formation type, including:

[0016] If the current working stratum is a pebble layer or a non-dense rock layer, the control current of the proportional pressure control valve is kept at the maximum current value until the current working stratum type changes or the operation is completed.

[0017] Optionally, the current operating current value of the electric power head is detected by the power head motor controller, including:

[0018] The actual torque of the electric power head is determined by the power head motor controller;

[0019] Calculate the torque deviation based on the actual torque and rated torque of the electric power head;

[0020] The current operating current value of the electric power head is determined based on the torque deviation and current-torque characteristic curve; wherein, the current-torque characteristic curve is used to describe the correspondence between the motor operating current and torque.

[0021] Optional, also includes:

[0022] The rated current value corresponding to the rated torque of the electric power head is determined using the current-torque characteristic curve.

[0023] The upper current threshold and the lower current threshold are selected on the current-torque characteristic curve based on the rated current value; wherein the upper current threshold is greater than the lower current threshold, the first torque difference is equal to the second torque difference, the first torque difference is the difference between the torque corresponding to the upper current threshold and the torque corresponding to the rated current value, and the second torque difference is the difference between the torque corresponding to the rated current value and the torque corresponding to the lower current threshold.

[0024] Optional, also includes:

[0025] Obtain the historical operation data of the range-extended rotary drilling rig;

[0026] The historical operation data is input into the artificial intelligence model to obtain the trend of the motor operating current value of the electric power head;

[0027] The pressure variation strategy of the pressurizing cylinder is generated based on the trend of the change in the motor operating current value;

[0028] The control current of the proportional pressure control valve is adjusted based on the pressure variation strategy.

[0029] This application also provides a pressure adaptive control system applied to a range-extended rotary drilling rig. The range-extended rotary drilling rig includes an electric power head, a power head motor controller, a pressure cylinder, and a proportional pressure control valve. The power head motor controller controls the motor of the electric power head, and the proportional pressure control valve controls the pressure of the pressure cylinder. The pressure adaptive control system includes:

[0030] A current detection module is used to detect the current operating current value of the electric power head through the power head motor controller;

[0031] The first control module is used to reduce the downward pressure of the pressurizing cylinder by increasing the control current of the proportional pressure control valve if the current motor operating current value is greater than the upper current threshold, so as to reduce the target operating parameters; wherein, the target operating parameters include cutting depth, power head drilling torque and power head operating load;

[0032] The second control module is used to increase the downward pressure of the pressurizing cylinder by reducing the control current of the proportional pressure control valve if the current operating current value of the motor is less than the lower current threshold, so as to increase the target operating parameter.

[0033] This application also provides a storage medium storing a computer program thereon, which, when executed, implements the steps of the above-described adaptive pressure control method.

[0034] This application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor, when calling the computer program in the memory, implements the steps of the above-described adaptive pressure control method.

[0035] This application discloses a pressure adaptive control method. This method detects the current operating current of the electric power head through the power head motor controller and dynamically adjusts the control current of the proportional pressure control valve based on the current operating current, thereby regulating the pressure of the pressurizing cylinder to optimize target operating parameters (including cutting depth, power head drilling torque, and power head operating load). When the motor operating current exceeds the upper current threshold, this application increases the control current of the proportional pressure control valve, reducing the downward pressure of the pressurizing cylinder, thereby reducing the cutting depth and drilling torque, and lowering the power head operating load. This process effectively prevents drill bit damage due to excessive load, reduces uneven drilling, reduces the risk of motor overload, and extends equipment lifespan. When the motor operating current is less than the lower current threshold, this application decreases the control current of the proportional pressure control valve, increasing the downward pressure of the pressurizing cylinder, thereby increasing the cutting depth and drilling torque, and increasing the power head operating load. This process improves construction efficiency and ensures that drilling depth and quality meet design requirements. This application achieves dynamic adjustment of operating parameters, which can improve the operating quality of range-extended rotary drilling rigs. This application also provides a pressure adaptive control system, a storage medium, and an electronic device, which have the aforementioned beneficial effects, and will not be elaborated further here. Attached Figure Description

[0036] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 A flowchart illustrating a pressure adaptive control method provided in an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the structure of a range-extended rotary drilling rig provided in an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of an adaptive pressurization control principle provided in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of a current-torque characteristic curve provided in an embodiment of this application;

[0041] Figure 5 A schematic diagram showing the correspondence between pressurization pressure and control current provided in an embodiment of this application;

[0042] Figure 6 This is a schematic diagram of a mode selection control principle provided in an embodiment of this application. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Please see below. Figure 1 , Figure 1 This is a flowchart of a pressure adaptive control method provided in an embodiment of this application.

[0045] Specific steps may include:

[0046] S101: The current operating current value of the electric power head is detected by the power head motor controller;

[0047] This embodiment can be applied to the vehicle controller of a range-extended rotary drilling rig. The range-extended rotary drilling rig may also include an electric power head, a power head motor controller, a pressure cylinder, and a proportional pressure control valve. The power head motor controller is used to control the motor of the electric power head, and the proportional pressure control valve is used to control the pressure of the pressure cylinder.

[0048] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of a range-extended rotary drilling rig provided in an embodiment of this application. Figure 2 The diagram shows a pressurizing cylinder, a proportional pressure control valve, an electric power head, a power head motor controller, a vehicle controller (also known as a controller), and the drill string. The proportional pressure control valve controls the downward pressure applied by the pressurizing cylinder, which provides downward pressure to the electric power head. The electric power head drives the drill string to rotate to overcome the load during operation. The electric power head feeds back the motor operating current value to the vehicle controller, which outputs different control currents to the proportional pressure control valve based on the program.

[0049] The aforementioned range-extended rotary drilling rig may also include a power head motor.

[0050] The power head motor controller can control the operation of the electric power head motor; the power head motor controller can be equipped with a current sensor to measure the motor's operating current value in real time. By detecting the current operating current value of the electric power head motor through the power head motor controller, the motor's working status can be monitored in real time.

[0051] After obtaining the current operating current value of the electric motor, this embodiment can compare the current operating current value with the upper current threshold and the lower current threshold, and perform operation S102 or S103 according to the comparison result. The upper current threshold is greater than the lower current threshold.

[0052] S102: If the current operating current of the motor is greater than the upper threshold current, the downward pressure of the pressurizing cylinder is reduced by increasing the control current of the proportional pressure control valve, so as to reduce the target operating parameters;

[0053] The electric power head driven by the motor of the range-extended rotary drilling rig exhibits the following characteristics during drilling operations: the operating current of the power head motor is directly proportional to the drilling torque and working load of the electric power head; the drilling torque and working load of the electric power head are directly proportional to the drilling depth of the electric power head; and the drilling depth of the electric power head is directly proportional to the pressure applied by the pressurizing cylinder. Higher pressure from the pressurizing cylinder increases the axial pressure on the electric power head during drilling, thereby increasing the drilling depth of the electric power head, the drilling torque of the electric power head and its motor, and the working load. Consequently, the operating current and load torque of the power head motor increase, and vice versa.

[0054] If the current operating current of the electric power head exceeds the set upper current threshold, it indicates that the power head is overloaded and the motor is under high load, potentially posing an overload risk. To avoid motor damage and optimize operating performance, this embodiment increases the control current of the proportional pressure control valve, thereby reducing the downward pressure of the pressurizing cylinder and thus lowering the target operating parameters such as the cutting depth, drilling torque, and operating load of the power head. These target operating parameters include the cutting depth, the power head drilling torque, and the power head operating load.

[0055] By employing the methods described above, this embodiment can effectively reduce the burden on the motor, prevent overload, and avoid poor work quality due to excessive load.

[0056] S103: If the current operating current of the motor is less than the lower current threshold, the downward pressure of the pressurizing cylinder is increased by reducing the control current of the proportional pressure control valve, so as to increase the target operating parameter.

[0057] If the current operating current of the electric power head is lower than the set lower current threshold, it indicates that the power head is underloaded and the motor is not performing at its full potential, which may lead to low construction efficiency. To address this, this step automatically reduces the control current of the proportional pressure control valve, thereby increasing the downward pressure of the pressurizing cylinder. This increases the target operating parameters of the power head, such as cutting depth, drilling torque, and operating load, enabling the power head to perform drilling operations more effectively. Through this method, adaptive pressure control is achieved, which fully utilizes the motor's power, improves construction efficiency, and enhances the overall operational capability of the range-extended rotary drilling rig.

[0058] This embodiment detects the current operating current of the electric power head via the power head motor controller and dynamically adjusts the control current of the proportional pressure control valve based on the current value. This, in turn, regulates the pressure applied by the pressurizing cylinder to optimize target operating parameters (including cutting depth, power head drilling torque, and power head operating load). When the motor operating current exceeds the upper current threshold, this embodiment increases the control current of the proportional pressure control valve, reducing the downward pressure applied by the pressurizing cylinder, thereby reducing the cutting depth and drilling torque, and lowering the power head operating load. This process effectively prevents drill bit damage due to excessive load, reduces uneven drilling, lowers the risk of motor overload, and extends equipment lifespan. When the motor operating current is below the lower current threshold, this embodiment decreases the control current of the proportional pressure control valve, increasing the downward pressure applied by the pressurizing cylinder, thereby increasing the cutting depth and drilling torque, and raising the power head operating load. This process improves construction efficiency and ensures that drilling depth and quality meet design requirements. This embodiment achieves dynamic adjustment of operating parameters, improving the operational quality of the range-extended rotary drilling rig.

[0059] As for Figure 1 In a further description of the corresponding embodiment, this embodiment can also determine the current working formation type of the range-extended rotary drilling rig and set the control current of the proportional pressure control valve according to the current working formation type. Specifically, this embodiment can determine the current working formation type of the range-extended rotary drilling rig through sensors or preset programs.

[0060] If the current working stratum is a soft rock layer or a sand layer, the control current of the proportional pressure control valve can be set in the following way: the control current of the proportional pressure control valve is kept at a preset value until the current working stratum type changes (i.e., the previous working stratum type is not a soft rock layer or a sand layer) or the operation is completed; wherein, the preset value is less than the maximum current value of the motor.

[0061] If the current working stratum type is a pebble layer or a non-dense rock layer, the control current of the proportional pressure control valve can be set in the following way: the control current of the proportional pressure control valve is kept at the maximum current value until the current working stratum type changes (i.e., the current working stratum type is not a pebble layer or a non-dense rock layer) or the operation is completed.

[0062] The above methods can be used to optimize operating parameters based on the current geological formation type, thereby improving construction efficiency and equipment adaptability.

[0063] As a feasible implementation method, this embodiment can determine the current operating current value of the electric power head using the current-torque characteristic curve. The specific process is as follows: the actual torque of the electric power head is determined by the power head motor controller; the torque deviation is calculated based on the actual torque and rated torque of the electric power head; the current operating current value of the electric power head is determined based on the torque deviation and the current-torque characteristic curve; wherein, the current-torque characteristic curve is used to describe the correspondence between the motor operating current and the torque.

[0064] This embodiment can also determine the upper and lower current thresholds using the aforementioned current-torque characteristic curve: the rated current value corresponding to the rated torque of the electric power head is determined using the current-torque characteristic curve; the upper and lower current thresholds are selected on the current-torque characteristic curve based on the rated current value.

[0065] Wherein, the upper current threshold is greater than the lower current threshold, the first torque difference is equal to the second torque difference, the first torque difference is the difference between the torque corresponding to the upper current threshold on the current torque characteristic curve and the torque corresponding to the rated current value, and the second torque difference is the difference between the torque corresponding to the rated current value on the current torque characteristic curve and the torque corresponding to the lower current threshold.

[0066] As a feasible implementation method, this embodiment can also use the following method to adjust the control current of the proportional pressure control valve: acquire the historical operation data of the range-extended rotary drilling rig; input the historical operation data into an artificial intelligence model to obtain the trend of the change in the motor operating current value of the electric power head; generate the pressure change strategy of the pressurizing cylinder based on the trend of the change in the motor operating current value; and adjust the control current of the proportional pressure control valve based on the pressure change strategy.

[0067] The aforementioned historical operation data may include parameters such as motor operating current value, applied pressure value, type of working stratum, and construction speed. The artificial intelligence model can analyze patterns and correlations in the historical operation data using machine learning algorithms to predict the changing trend of the motor operating current value of the electric power head, i.e., the trend of motor operating current value change. Based on the predicted trend of motor operating current value change, this embodiment can generate a corresponding applied pressure change strategy. For example, if the prediction shows an upward trend in the current value, it indicates that the load on the electric power head will increase; in this case, the applied pressure change strategy can be to reduce the applied pressure to avoid motor overload. Conversely, if the current value shows a downward trend, it indicates that the load on the electric power head will decrease; in this case, the applied pressure change strategy can be to increase the applied pressure to improve operation efficiency.

[0068] The current regulation process may exhibit a certain degree of lag. To address this issue, this embodiment offers an improvement method as follows: The upper and lower current thresholds are automatically adjusted based on different operating stages, conditions, and the real-time status of the equipment. Specifically, this embodiment collects data related to the operating stage, conditions, and equipment status (such as load size, operating speed, and equipment temperature), using this data as input variables for the fuzzy controller. Fuzzy rules are set based on experience, such as "increase the upper current threshold when the load is high and the operating speed is slow." The fuzzy controller calculates appropriate upper and lower current thresholds through fuzzy inference based on the fuzzy rules and input data, thereby achieving dynamic threshold adjustment and ensuring stable and efficient system operation under various conditions.

[0069] During the operation of a range-extended rotary drilling rig, conventional control methods typically only allow for simple adjustments based on current operating parameters, making it difficult to achieve precise control and optimization of these parameters under complex working conditions. To address this issue, this embodiment offers an improvement, specifically as follows: A dynamic model of the electric power head operating system is constructed, encompassing the relationship between motor current, hydraulic cylinder pressure, and target operating parameters. This embodiment can use a future operating target (such as cutting depth, drilling torque, etc.) as the optimization objective, combining the current system state and model predictions to calculate the optimal control input (such as the control current of the proportional pressure control valve) in real time. This process can predict trends during operation in advance and dynamically adjust the control strategy, thereby achieving precise control and optimization of operating parameters.

[0070] The process described in the above embodiments is illustrated below through examples in practical applications.

[0071] A stable torque operation of the power head motor not only ensures a steady operating current but also prevents damage to the main mechanism from load fluctuations. Due to variations in the working load, existing range-extended rotary drilling rigs experience torque fluctuations during drilling operations. Furthermore, because the drilling depth cannot be adjusted in real time, the working load often falls below the rated torque of the electric power head, hindering its efficient operation. In addition, different geological formations require different pressure drilling techniques; current solutions rely on manual pressure application by the operator based on experience, resulting in low efficiency and inconsistent quality.

[0072] To address the technical problems existing in the aforementioned related technologies, this embodiment provides a control scheme for the adaptive drilling torque of an electric power head using a pressurized hydraulic cylinder. This scheme achieves correlated control between the operating torque of the electric power head and the pressure applied by the pressurized hydraulic cylinder; it fully utilizes the operating capacity of the electric power head, improving its operating efficiency and construction quality; it also enhances the reliability of the electric power head operation, preventing excessive drill bit wear, motor or motor driver overload damage, and reducing downtime caused by malfunctions. Specifically, this scheme achieves adaptive pressure control through the following methods: acquiring the operating current signal of the electric power head motor, programmatically controlling the current of the proportional pressure control valve of the pressurized hydraulic cylinder, and adjusting the axial pressure of the electric power head in real time. When the load torque is high, it stabilizes the load torque of the electric power head during drilling; when the load torque is low, it automatically increases the drilling speed to improve drilling efficiency. This scheme can also set multiple adaptive pressurization modes for selection and switching to adapt to different formation needs. For example, a light pressure, slow advance mode is used for soft rock and sand formations; a no-pressure, slow advance mode is used for pebble and non-compact rock formations.

[0073] When the electric power head of the range-extended electric rotary drilling rig drives the drill string for drilling operations, the pressure cylinder applies pressure downwards to the electric power head, which is then transmitted to the drill string to control the cutting depth. Specifically, this embodiment can have the following control modes:

[0074] Automatic control mode for sudden load changes: The operating current value I of the power head motor is monitored in real time by the power head motor controller. When the operating current value I of the power head motor reaches the upper threshold Imax of the monitoring current set by the controller, the controller immediately issues a command to increase the control current of the proportional pressure control valve, thereby reducing the pressure of the proportional control, reducing the downward pressure of the pressurizing cylinder, reducing the cutting depth of the drill bit, and reducing the operating load of the electric power head and the power head motor. The control current of the proportional pressure control valve is stabilized after the operating current of the power head motor drops to the lower threshold Imin of the monitoring current set by the controller.

[0075] Gradual load automatic control mode: The power head motor controller monitors the operating current value I of the power head motor in real time. When the detected operating current value I of the power head motor is lower than the lower threshold Imin set by the controller, the controller immediately issues a command to reduce the control current of the proportional pressure control valve, thereby increasing the pressure of the proportional control valve, increasing the downward pressure of the pressurizing cylinder, increasing the cutting depth of the drill bit, and increasing the working load of the electric power head and the power head motor, until the operating current I of the power head motor increases to the upper threshold Imax set by the controller, at which point the system enters the rapid load automatic control mode.

[0076] Alternating load control mode selection: For soft rock and sand formations, a light pressure and slow advance mode is adopted; that is, by constantly controlling the current Iy of the proportional pressure control valve of the pressurizing cylinder, the pressure of the pressurizing cylinder is kept at a small value, so as to realize the light pressure and slow advance drilling process. This is suitable for solving the motor vibration phenomenon caused by alternating working load when drilling soft rock and sand formations.

[0077] Heavy load control mode selection: For strata such as gravel layers and non-dense rock layers, a zero-pressure mode is adopted: the current of the proportional pressure control valve of the pressurizing cylinder is controlled by the maximum current, so that the pressure of the pressurizing cylinder is directly reduced to zero, realizing a slow drilling process without pressure. This is suitable for drilling strata such as gravel layers and non-dense rock layers, eliminating the phenomenon of motor overload protection stalling caused by excessive drilling load.

[0078] Please see Figure 3 , Figure 3 This is a schematic diagram of an adaptive pressurization control principle provided in an embodiment of this application. The deviation is determined based on the rated torque and actual torque of the power head. This deviation is then fed into the current-torque characteristic curve in the controller for querying, and the query result is output to the pressurization control unit. The pressurization control unit can transmit the control output to the pressurization cylinder solenoid valve (i.e., the pressurization cylinder control valve). "+" indicates positive feedback, and "-" indicates negative feedback.

[0079] Please see Figure 4 , Figure 4 This is a schematic diagram of a current-torque characteristic curve provided in an embodiment of this application. Figure 4 The horizontal axis represents the motor operating current I of the electric power head (in Amperes per meter), and the vertical axis represents the motor torque T (in Newtons per meter). Tmax represents the maximum working torque value, TB represents the rated working torque value, and IB represents the current value corresponding to the rated working torque value. The figure also shows the positions of the upper and lower threshold values.

[0080] Please see Figure 5 , Figure 5 This is a schematic diagram illustrating the correspondence between pressurization pressure and control current provided in an embodiment of this application. Figure 5The horizontal axis represents the current Iy (in milliamperes, mA), and the vertical axis represents the pressure P (in bar).

[0081] In this embodiment, the rated working torque value TB of the variable frequency motor and the upper and lower threshold values ​​of the trigger control current can be stored in the controller. During operation, the upper and lower threshold values ​​of the trigger control current are compared with the current working current, and the corresponding command current is output in a timely manner to control the proportional pressure control valve of the pressurizing cylinder, thereby adjusting the downward pressure of the pressurizing cylinder and the cutting depth of the drill bit in real time.

[0082] As can be seen, in this embodiment, the controller collects the actual working current of the electric power head motor, queries and compares the upper and lower threshold values ​​of the trigger control current set by the controller, and outputs corresponding instructions to control the control current of the proportional pressure control valve set in the pressure chamber of the pressure cylinder in real time. This changes the axial pressure of the pressure cylinder on the power head, changes the cutting depth of the power head transmission terminal drill bit, and ensures that the working load of the power head transmission terminal drill bit is always within the rated working torque of the power head.

[0083] Please see Figure 6 , Figure 6 This is a schematic diagram of a mode selection control principle provided in an embodiment of this application. In this embodiment, the 0 pressurization mode command and the adjustable pressurization mode command can be transmitted to the pressurization control unit of the controller so as to control the pressurization cylinder solenoid valve.

[0084] Specifically, if the controller receives a 0-pressure mode command, it outputs the maximum control current to control the proportional pressure control valve so that the cylinder pressure P returns to 0, realizing a slow drilling process without pressure; if the controller receives an adjustable pressure mode command, it controls the proportional pressure control valve according to the command signal to stabilize the cylinder pressure P at a certain value, realizing a slow drilling process with light pressure.

[0085] As can be seen, this embodiment provides an adaptive drilling process with multiple formation modes to choose from. According to the selected formation mode, the program outputs a stable control current to control the proportional pressure control valve of the pressurizing cylinder pressurizing chamber, stabilizes the axial pressure of the pressurizing cylinder on the power head downward, and realizes a variety of special drilling processes such as light pressure and slow advance, no pressure and slow advance.

[0086] This application provides a pressure adaptive control system applied to a range-extended rotary drilling rig. The range-extended rotary drilling rig includes an electric power head, a power head motor controller, a pressure cylinder, and a proportional pressure control valve. The power head motor controller controls the motor of the electric power head, and the proportional pressure control valve controls the pressure of the pressure cylinder. The pressure adaptive control system includes:

[0087] A current detection module is used to detect the current operating current value of the electric power head through the power head motor controller;

[0088] The first control module is used to reduce the downward pressure of the pressurizing cylinder by increasing the control current of the proportional pressure control valve if the current motor operating current value is greater than the upper current threshold, so as to reduce the target operating parameters; wherein, the target operating parameters include cutting depth, power head drilling torque and power head operating load;

[0089] The second control module is used to increase the downward pressure of the pressurizing cylinder by reducing the control current of the proportional pressure control valve if the current operating current value of the motor is less than the lower current threshold, so as to increase the target operating parameter.

[0090] This embodiment detects the current operating current of the electric power head via the power head motor controller and dynamically adjusts the control current of the proportional pressure control valve based on the current value. This, in turn, regulates the pressure applied by the pressurizing cylinder to optimize target operating parameters (including cutting depth, power head drilling torque, and power head operating load). When the motor operating current exceeds the upper current threshold, this embodiment increases the control current of the proportional pressure control valve, reducing the downward pressure applied by the pressurizing cylinder, thereby reducing the cutting depth and drilling torque, and lowering the power head operating load. This process effectively prevents drill bit damage due to excessive load, reduces uneven drilling, lowers the risk of motor overload, and extends equipment lifespan. When the motor operating current is below the lower current threshold, this embodiment decreases the control current of the proportional pressure control valve, increasing the downward pressure applied by the pressurizing cylinder, thereby increasing the cutting depth and drilling torque, and raising the power head operating load. This process improves construction efficiency and ensures that drilling depth and quality meet design requirements. This embodiment achieves dynamic adjustment of operating parameters, improving the operational quality of the range-extended rotary drilling rig.

[0091] Furthermore, it also includes:

[0092] The third control module is used to determine the current working formation type of the range-extended rotary drilling rig; it is also used to set the control current of the proportional pressure control valve according to the current working formation type.

[0093] Furthermore, the process by which the third control module sets the control current of the proportional pressure control valve according to the current working stratum type includes: if the current working stratum type is a soft rock layer or a sand layer, then the control current of the proportional pressure control valve is kept at a preset value until the current working stratum type changes or the operation is completed; wherein, the preset value is less than the maximum current value of the motor.

[0094] Furthermore, the process by which the third control module sets the control current of the proportional pressure control valve according to the current working stratum type includes: if the current working stratum type is a pebble layer or a non-dense rock layer, then the control current of the proportional pressure control valve is kept at the maximum current value until the current working stratum type changes or the operation is completed.

[0095] Furthermore, the process by which the current detection module detects the current operating current value of the electric power head through the power head motor controller includes: determining the actual torque of the electric power head through the power head motor controller; calculating the torque deviation based on the actual torque and rated torque of the electric power head; and determining the current operating current value of the electric power head based on the torque deviation and the current-torque characteristic curve; wherein, the current-torque characteristic curve is used to describe the correspondence between the motor operating current and the torque.

[0096] Furthermore, it also includes:

[0097] The threshold setting module is used to determine the rated current value corresponding to the rated torque of the electric power head using the current-torque characteristic curve; it is also used to select the upper current threshold and the lower current threshold on the current-torque characteristic curve according to the rated current value; wherein the upper current threshold is greater than the lower current threshold, the first torque difference is equal to the second torque difference, the first torque difference is the difference between the torque corresponding to the upper current threshold and the torque corresponding to the rated current value, and the second torque difference is the difference between the torque corresponding to the rated current value and the torque corresponding to the lower current threshold.

[0098] Furthermore, it also includes:

[0099] The fifth control module is used to acquire historical operation data of the range-extended rotary drilling rig; it is also used to input the historical operation data into an artificial intelligence model to obtain the trend of the change in the motor operating current value of the electric power head; it is also used to generate a pressure change strategy for the pressurizing cylinder based on the trend of the change in the motor operating current value; and it is also used to adjust the control current of the proportional pressure control valve based on the pressure change strategy.

[0100] Since the embodiments of the system part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the system part, and they will not be repeated here.

[0101] This application also provides a storage medium on which a computer program is stored, which, when executed, can perform the steps provided in the above embodiments. The storage medium may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0102] This application also provides an electronic device that may include a memory and a processor. The memory stores a computer program, and when the processor calls the computer program in the memory, it can implement the steps provided in the above embodiments. Of course, the electronic device may also include various network interfaces, power supplies, and other components.

[0103] 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 systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

[0104] It should also be noted that, in this specification, 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.

Claims

1. A pressure-adaptive control method, characterized in that, This invention relates to a range-extended rotary drilling rig, which includes an electric power head, a power head motor controller, a pressure cylinder, and a proportional pressure control valve. The power head motor controller controls the motor of the electric power head, and the proportional pressure control valve controls the pressure of the pressure cylinder. The adaptive pressure control method includes: The current operating current value of the electric power head is detected by the power head motor controller; If the current operating current of the motor is greater than the upper threshold current, the downward pressure of the pressurizing cylinder is reduced by increasing the control current of the proportional pressure control valve, so as to reduce the target operating parameters; wherein, the target operating parameters include cutting depth, drilling torque of the power head, and operating load of the power head; If the current operating current of the motor is less than the lower threshold current, the downward pressure of the pressurizing cylinder is increased by reducing the control current of the proportional pressure control valve, so as to increase the target operating parameter. Determine the current geological formation type of the extended-range rotary drilling rig; Set the control current of the proportional pressure control valve according to the current geological formation type; The control current of the proportional pressure control valve, set according to the current geological formation type, includes: If the current working stratum is a soft rock layer or a sand layer, the control current of the proportional pressure control valve is maintained at a preset value until the current working stratum type changes or the operation is completed; wherein, the preset value is less than the maximum current value of the motor; If the current working stratum type is a pebble layer or a non-dense rock layer, the control current of the proportional pressure control valve is kept at the maximum current value until the current working stratum type changes or the operation is completed. The detection of the current operating current value of the electric power head by the power head motor controller includes: The actual torque of the electric power head is determined by the power head motor controller; Calculate the torque deviation based on the actual torque and rated torque of the electric power head; The current operating current value of the electric power head is determined based on the torque deviation and current-torque characteristic curve; wherein, the current-torque characteristic curve is used to describe the correspondence between the motor operating current and torque. Accordingly, the adaptive pressure control method further includes: The rated current value corresponding to the rated torque of the electric power head is determined using the current-torque characteristic curve. The upper current threshold and the lower current threshold are selected on the current-torque characteristic curve based on the rated current value; wherein the upper current threshold is greater than the lower current threshold, the first torque difference is equal to the second torque difference, the first torque difference is the difference between the torque corresponding to the upper current threshold and the torque corresponding to the rated current value, and the second torque difference is the difference between the torque corresponding to the rated current value and the torque corresponding to the lower current threshold.

2. The adaptive pressure control method according to claim 1, characterized in that, Also includes: Obtain the historical operation data of the range-extended rotary drilling rig; The historical operation data is input into the artificial intelligence model to obtain the trend of the motor operating current value of the electric power head; The pressure variation strategy of the pressurizing cylinder is generated based on the trend of the change in the motor operating current value; The control current of the proportional pressure control valve is adjusted based on the pressure variation strategy.

3. A pressure-adaptive control system, characterized in that, This invention relates to a range-extended rotary drilling rig, comprising an electric power head, a power head motor controller, a pressure cylinder, and a proportional pressure control valve. The power head motor controller controls the motor of the electric power head, and the proportional pressure control valve controls the pressure of the pressure cylinder. The adaptive pressure control system includes: A current detection module is used to detect the current operating current value of the electric power head through the power head motor controller; The first control module is used to reduce the downward pressure of the pressurizing cylinder by increasing the control current of the proportional pressure control valve if the current motor operating current value is greater than the upper current threshold, so as to reduce the target operating parameters; wherein, the target operating parameters include cutting depth, power head drilling torque and power head operating load; The second control module is used to increase the downward pressure of the pressurizing cylinder by reducing the control current of the proportional pressure control valve if the current motor operating current value is less than the current lower threshold, so as to increase the target operating parameter. The third control module is used to determine the current working formation type of the range-extended rotary drilling rig; it is also used to set the control current of the proportional pressure control valve according to the current working formation type. The process by which the third control module sets the control current of the proportional pressure control valve according to the current working stratum type includes: if the current working stratum type is a soft rock layer or a sand layer, the control current of the proportional pressure control valve is maintained at a preset value until the current working stratum type changes or the operation is completed; wherein, the preset value is less than the maximum current value of the motor; if the current working stratum type is a pebble layer or a non-dense rock layer, the control current of the proportional pressure control valve is maintained at the maximum current value until the current working stratum type changes or the operation is completed. The process by which the current detection module detects the current operating current value of the electric power head through the power head motor controller includes: determining the actual torque of the electric power head through the power head motor controller; calculating the torque deviation based on the actual torque and rated torque of the electric power head; and determining the current operating current value of the electric power head based on the torque deviation and the current-torque characteristic curve; wherein, the current-torque characteristic curve is used to describe the correspondence between the motor operating current and the torque; The pressure adaptive control system further includes: The threshold setting module is used to determine the rated current value corresponding to the rated torque of the electric power head using the current-torque characteristic curve; it is also used to select the upper current threshold and the lower current threshold on the current-torque characteristic curve according to the rated current value; wherein the upper current threshold is greater than the lower current threshold, the first torque difference is equal to the second torque difference, the first torque difference is the difference between the torque corresponding to the upper current threshold and the torque corresponding to the rated current value, and the second torque difference is the difference between the torque corresponding to the rated current value and the torque corresponding to the lower current threshold.

4. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the pressure adaptive control method as described in claim 1 or 2 when it calls the computer program in the memory.

5. A storage medium, characterized in that, The storage medium stores computer-executable instructions, which, when loaded and executed by a processor, implement the steps of the pressure adaptive control method as described in claim 1 or 2.

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