A multi-valve coordinated control system and method for a choke manifold control pod

Abstract

This invention discloses a multi-valve collaborative control system and method for a throttling manifold control box. The system utilizes a data acquisition module to collect process parameters and valve status parameters in real time. A data analysis module calculates the required total throttling pressure drop or total flow rate based on the operator-set target bottom-hole pressure or target flow rate, combined with real-time data. A valve role allocation module assigns valve roles according to preset rules. An instruction generation module proportionally allocates the total demand to each valve to generate a target opening instruction set. An instruction verification module verifies the safety of the instructions using a safety interlock matrix. A valve drive module executes the verified instructions. A feedback optimization module calculates corrections based on actual parameter deviations and iteratively optimizes the system. This invention solves the problems of insufficient accuracy, slow response speed, and poor safety in multi-valve collaborative control, improves the accuracy and reliability of throttling control, reduces valve wear, and enhances the system's anti-interference capability and fault emergency response efficiency during sudden changes in operating conditions.

Description

Technical Field

[0001] This invention belongs to the field of oil drilling well control technology, and specifically discloses a multi-valve coordinated control system and method for a choke manifold control box. Background Technology

[0002] In oil drilling operations, the choke manifold control box is the core equipment of the well control system. It is used to control bottom hole pressure and drilling fluid flow by adjusting valve openings to prevent major accidents such as blowouts and lost circulation. Traditional choke manifold control mainly relies on manual control or single-engine automatic control, which has the following shortcomings:

[0003] Response lag: Manual operation cannot respond to changes in complex working conditions in real time, such as sudden changes in formation pressure and fluctuations in drilling fluid parameters, which can easily lead to loss of control of bottom hole pressure;

[0004] Insufficient valve coordination: Existing automatic systems mostly focus on single-valve control and lack a dynamic role allocation and cooperation mechanism among multiple valves. When the main control valve fails or is under high load, the backup control valve cannot quickly take over the task, causing regulation interruption.

[0005] Lack of safety verification: Valve operation lacks interlock verification, which may cause pipeline impact or equipment damage due to opening conflict;

[0006] Low energy efficiency: Fixed valve role allocation leads to uneven wear, shortens valve life, and makes it impossible to optimize load distribution according to real-time operating conditions;

[0007] Although some improvement solutions attempt to introduce multi-valve control, they generally lack intelligent dynamic allocation mechanisms for valve roles, command verification based on safety interlock matrices, and closed-loop feedback optimization capabilities, making it difficult to meet the high-precision and high-reliability well control requirements.

[0008] Therefore, it is necessary to invent a multi-valve coordinated control system and method for throttling manifold control boxes to solve the above problems. Summary of the Invention

[0009] To overcome the aforementioned deficiencies in the prior art, this invention provides a multi-valve collaborative control system and method for a throttling manifold control box. The system utilizes a data acquisition module to collect process parameters and valve status parameters in real time. A data analysis module calculates the required total throttling pressure drop or total flow rate based on the operator-set target bottom-hole pressure or target flow rate, combined with real-time data. A valve role allocation module assigns valve roles according to preset rules. An instruction generation module proportionally allocates the total demand to each valve to generate a target opening instruction set. An instruction verification module verifies the safety of the instructions using a safety interlock matrix. A valve drive module executes verified instructions. A feedback optimization module calculates corrections based on actual parameter deviations and iteratively optimizes the system, effectively solving the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a multi-valve collaborative control system for a throttling manifold control box, characterized in that it includes: a data acquisition module, a data analysis module, a valve role allocation module, an instruction generation module, an instruction verification module, a valve drive module, and a feedback optimization module;

[0011] Data acquisition module: Real-time acquisition of process parameters and valve status parameters;

[0012] Data analysis module: Based on the target bottom hole pressure or target flow command set by the operator, and combined with the collected real-time data, calculate the total throttling pressure drop or total flow required to maintain the target;

[0013] Valve Role Assignment Module: Based on preset assignment rules and parameters collected by the data acquisition module, outputs the current valve role assignment result;

[0014] Instruction generation module: Based on the valve flow characteristic curve and role allocation results, the total throttling pressure drop / total flow is proportionally allocated to each valve to generate the target opening instruction set;

[0015] Command verification module: Used to receive the target opening instruction set, verify it according to the safety interlock matrix, and check whether the target opening instruction in the target opening instruction set violates the safety rules;

[0016] Valve drive module: Used to receive and execute the verified target opening instruction set to adjust the opening of each valve;

[0017] Feedback optimization module: used to compare actual process parameters with set targets, and calculate correction amounts based on actual valve position feedback;

[0018] The preset allocation rules include:

[0019] When the system starts up / resets, it prioritizes selecting valves that are in a healthy state, choosing the valve with the lowest wear index as the main control valve, the valve with the fastest response as the backup control valve, and prioritizing valves with low wear as standby valves. Furthermore, the physical locations of all valves must be isolated.

[0020] When the main control valve opening is ≥90% for 30 seconds, a dual main control valve mode is adopted, and the standby control valve is upgraded to the second main control valve, with the flow distribution adjusted to 60%:40%.

[0021] When the main control valve response delay is greater than 2 seconds, the main control valve is downgraded to standby mode, and the standby control valve takes over the role of the main control valve. A new standby control valve is selected from the standby queue.

[0022] When the inlet pressure fluctuation exceeds 15% of the rated value, one standby valve is activated and added to the backup group, forming a main regulating valve + dual backup structure. The structure is restored after the pressure stabilizes.

[0023] When a valve changes to a fault state, its opening is frozen, and the flow is compensated by an adjacent valve.

[0024] The safety interlock matrix defines the physical position constraints between valves and the minimum safe opening difference rules; if the instruction verification module detects that an instruction violates the safety rules, it marks it as an abnormal instruction set and triggers an alarm to block execution.

[0025] The specific analysis method of the feedback optimization module is as follows:

[0026] First, compare the actual process parameters with the set target, calculate the deviation between the actual value and the set target, i.e. the correction amount, and then allocate the correction amount according to the allocation rules of the preset allocation rules. The correction amount is then added to the original valve target opening to obtain a new valve target opening.

[0027] Preferably, the process parameters include the choke manifold inlet pressure, drilling fluid density, vertical well depth, wellbore length, wellbore inner diameter, flow rate in the choke manifold, and drilling fluid dynamic viscosity; the valve status parameters include the current opening degree of each valve, the actual flow rate of each valve, and its health status.

[0028] Preferably, the specific analysis method of the data analysis module is as follows:

[0029] When the target is set as the bottom hole pressure, according to the formula Calculate the required total throttling pressure drop, where ΔP is in the formula. h For the static pressure drop, ΔP f For wellbore friction pressure drop, ΔP tr For the required total throttling pressure drop, P in To throttle the manifold inlet pressure, BHP tar The target bottom hole pressure;

[0030] When the target is set as traffic volume, the total traffic volume required by the system is the set value.

[0031] Preferably, the hydrostatic column pressure drop ΔP h The calculation formula is: In the formula, ρ is the drilling fluid density, g is the gravitational acceleration, and H is the vertical well depth; the wellbore friction pressure drop ΔP f The calculation formula is: In the formula, f is the friction coefficient, L is the wellbore length, D is the wellbore inner diameter, and v is the drilling fluid velocity. The calculation formula is as follows: In the formula, Q represents the flow rate in the throttling manifold.

[0032] Preferably, the friction coefficient depends on the flow regime and wellbore roughness, and its specific analysis method is as follows:

[0033] Through formula Calculate the Reynolds number Re, where μ is the dynamic viscosity of the drilling fluid in the formula;

[0034] When Re < 2100 ;

[0035] When Re > 2100 In the formula, ε represents the roughness of the well wall.

[0036] Preferably, the valve roles include main regulating valve, standby regulating valve, standby valve, and isolation valve;

[0037] The main control valve is used to perform the core throttling task and is responsible for the main flow regulation;

[0038] The standby control valve is used to assist the main control valve and undertake secondary flow regulation. It automatically takes over the main control valve's task when the main control valve fails.

[0039] The standby valve is in a low-power standby state and is activated when the main / standby valve fails or the operating condition changes suddenly.

[0040] Isolation valves are used for forced closure in emergency shut-off situations to protect pipeline safety.

[0041] Preferably, a multi-valve coordinated control method for a throttling manifold control box specifically includes the following steps:

[0042] S1. The data acquisition module collects process parameters and valve status parameters in real time.

[0043] S2. The data analysis module calculates the total throttling pressure drop or total flow rate required to maintain the target based on the target bottom hole pressure or target flow rate command set by the operator, combined with the collected real-time process parameters and valve status parameters.

[0044] S3. The valve role allocation module outputs the current valve role allocation result based on the preset valve role allocation rules and the parameters collected by the data acquisition module.

[0045] S4. The instruction generation module calculates the target opening degree of each valve based on the total throttling pressure drop or total flow rate, valve role, and preset flow distribution strategy, and generates and outputs the target opening degree instruction set.

[0046] S5. The instruction verification module uses a safety interlock matrix to verify the target opening instruction set. If it passes, it is marked as a safe instruction set; otherwise, an alarm is triggered and the process is blocked.

[0047] S6. The valve drive module receives and executes the safety instruction set, driving the corresponding valve to adjust to the target opening degree.

[0048] S7. The feedback optimization module compares the actual process parameters with the set target. If the deviation is greater than the preset threshold, it calculates the correction amount and jumps back to step 4 to update the valve target opening. Otherwise, it maintains the current command.

[0049] The technical effects and advantages of this invention are as follows:

[0050] 1. High-precision dynamic control and stability optimization: By collecting process parameters and valve status parameters, and combining them with a fluid dynamics model to calculate the total throttling pressure drop / total flow demand, the control accuracy of bottom hole pressure or flow is improved.

[0051] 2. Multi-level fault tolerance and intelligent collaboration mechanism: Dynamic allocation of valve roles and linkage with preset rules enable seamless fault switching and load balancing.

[0052] 3. Enhanced safety and response speed: The safety interlock matrix and instruction verification module hard block abnormal operations, combined with a rapid response mechanism for sudden changes in operating conditions. Attached Figure Description

[0053] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0054] Figure 1 This is a system module connection diagram of the present invention.

[0055] Figure 2 This is a flowchart illustrating the overall steps of the present invention. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] This invention provides a multi-valve collaborative control system for a throttling manifold control box, comprising: a data acquisition module, a data analysis module, a valve role assignment module, an instruction generation module, an instruction verification module, a valve drive module, and a feedback optimization module. The system modules are connected as follows: Figure 1 As shown, the data acquisition module is connected to the data analysis module, the data analysis module is connected to the valve role allocation module, the valve role allocation module is connected to the instruction generation module, the instruction generation module is connected to the instruction verification module, the instruction verification module is connected to the valve drive module, and the valve drive module is connected to the feedback optimization module.

[0058] Furthermore, in the above technical solution, the data acquisition module is used to collect process parameters and valve status parameters in real time;

[0059] The data analysis module is used to calculate the total throttling pressure drop or total flow rate required to maintain the target based on the target bottom hole pressure or target flow rate command set by the operator and the collected real-time data.

[0060] The valve role allocation module is used to output the current valve role allocation result based on the preset allocation rules and the parameters collected by the data acquisition module;

[0061] The instruction generation module is used to distribute the total throttling pressure drop / total flow to each valve according to the valve flow characteristic curve and role allocation results, and generate the target opening instruction set.

[0062] The instruction verification module is used to receive the target opening instruction set, verify it according to the safety interlock matrix, and check whether the target opening instruction in the target opening instruction set violates the safety rules.

[0063] The valve drive module is used to receive and execute the target opening instruction set that has passed the verification, and adjust the opening of each valve;

[0064] The feedback optimization module compares the actual process parameters with the set target and calculates the correction amount based on the actual valve position feedback.

[0065] like Figure 2 As shown, a multi-valve coordinated control method for a throttling manifold control box specifically includes the following steps:

[0066] S1. The data acquisition module collects process parameters and valve status parameters in real time.

[0067] Furthermore, in the above technical solution, the process parameters include the choke manifold inlet pressure, drilling fluid density, vertical well depth, wellbore length, wellbore inner diameter, flow rate in the choke manifold, and drilling fluid dynamic viscosity; the valve status parameters include the current opening degree of each valve, the actual flow rate of each valve, and its health status.

[0068] It should be further explained that, in the preferred technical solution of the present invention, the inlet pressure of the throttling manifold is collected in real time by a piezoresistive pressure sensor, the flow rate of the throttling manifold is monitored by an electromagnetic flowmeter, the drilling fluid density and dynamic viscosity are collected by a densitometer and a viscometer, the valve opening sensor provides feedback on the real-time opening of each valve, and the health status is assessed through diagnosis.

[0069] Furthermore, in the above technical solution, the health status determination indicators include wear index, response delay, internal leakage rate, opening deviation, and pressure fluctuation sensitivity. If all indicators are within the corresponding threshold, it is a healthy state. If one indicator exceeds the corresponding warning threshold, it is a sub-healthy state. If two indicators exceed the corresponding warning threshold, it is a warning state. If any of the following conditions are met: internal leakage rate > 5%, response delay > 2s, or opening uncontrolled, it is a fault state.

[0070] It should be further explained that the wear index is quantified by the cumulative equivalent throttling volume, and the calculation formula is as follows: , Q in the formula i Let t be the average flow rate through the valve in the i-th analysis interval, n be the total number of analysis intervals, and t be the average flow rate through the valve. i The runtime of the i-th analysis interval; the response delay is quantified by the average time difference between the command being issued and the valve opening reaching the target; the internal leakage rate is expressed by the formula... Quantification, Q in the formula 指令 Q is the target flow rate of the valve. 实际 The valve's actual flow rate is used; the opening deviation is quantified by the standard deviation between the valve's actual opening and the target opening under steady state; the pressure fluctuation sensitivity is quantified by the adjustment time of the valve to maintain the set flow rate when the valve inlet pressure fluctuates.

[0071] S2. The data analysis module calculates the total throttling pressure drop or total flow rate required to maintain the target based on the target bottom hole pressure or target flow rate command set by the operator, combined with the collected real-time process parameters and valve status parameters.

[0072] Furthermore, in the above technical solution, the specific analysis method of the data analysis module is as follows:

[0073] When the target is set as the bottom hole pressure, according to the formula Calculate the required total throttling pressure drop, where ΔP is in the formula. h For the static pressure drop, ΔP f For wellbore friction pressure drop, ΔP tr For the required total throttling pressure drop, P in To throttle the manifold inlet pressure, BHP tar The target bottom hole pressure;

[0074] When the target is set as traffic volume, the total traffic volume required by the system is the set value.

[0075] Furthermore, in the above technical solution, the hydrostatic column pressure drop ΔP h The calculation formula is: In the formula, ρ is the drilling fluid density, g is the gravitational acceleration, and H is the vertical well depth; the wellbore friction pressure drop ΔP f The calculation formula is: In the formula, f is the friction coefficient, L is the wellbore length, D is the wellbore inner diameter, and v is the drilling fluid velocity. The calculation formula is as follows: In the formula, Q represents the flow rate in the throttling manifold.

[0076] Furthermore, in the above technical solution, the friction coefficient depends on the flow regime and the wellbore roughness, and its specific analysis method is as follows:

[0077] Through formula Calculate the Reynolds number Re, where μ is the dynamic viscosity of the drilling fluid in the formula;

[0078] When Re < 2100 ;

[0079] When Re > 2100 In the formula, ε represents the roughness of the well wall.

[0080] S3. The valve role allocation module outputs the current valve role allocation result based on the preset valve role allocation rules and the parameters collected by the data acquisition module.

[0081] Furthermore, in the above technical solution, the valve roles include main regulating valve, standby regulating valve, standby valve, and isolation valve;

[0082] The main control valve is used to perform the core throttling task and is responsible for the main flow regulation;

[0083] The standby control valve is used to assist the main control valve and undertake secondary flow regulation. It automatically takes over the main control valve's task when the main control valve fails.

[0084] The standby valve is in a low-power standby state and is activated when the main control valve or the backup control valve fails or the operating conditions change suddenly.

[0085] Isolation valves are used for forced closure in emergency shut-off situations to protect pipeline safety.

[0086] In a preferred embodiment of the present invention, the main regulating valve undertakes 70% of the flow regulation, and the standby regulating valve undertakes 30% of the flow regulation.

[0087] Furthermore, in the above technical solution, the preset allocation rule includes:

[0088] When the system starts up / resets, it prioritizes selecting valves that are in a healthy state, choosing the valve with the lowest wear index as the main control valve, the valve with the fastest response as the backup control valve, and prioritizing valves with low wear as standby valves. Furthermore, the physical locations of all valves must be isolated.

[0089] Furthermore, in the above technical solution, the preset allocation rule includes:

[0090] Valves in good condition can serve as main control valves and standby control valves; valves in sub-healthy condition can serve as standby control valves; valves in warning condition can only undertake low-load tasks or serve as standby valves.

[0091] When the main control valve opening is ≥90% for 30 seconds, a dual main control valve mode is adopted, and the standby control valve is upgraded to the second main control valve, with the flow distribution adjusted to 60%:40%.

[0092] When the main control valve response delay is greater than 2 seconds, the main control valve is downgraded to standby mode, and the standby control valve takes over the role of the main control valve. A new standby control valve is selected from the standby queue.

[0093] When the inlet pressure fluctuation exceeds 15% of the rated value, one standby valve is activated and added to the backup group, forming a main regulating valve + dual backup structure. The structure is restored after the pressure stabilizes.

[0094] When a valve changes to a fault state, its opening is frozen, and the flow is compensated by an adjacent valve.

[0095] S4. The instruction generation module calculates the target opening degree of each valve based on the total throttling pressure drop or total flow rate, valve role, and preset flow distribution strategy, and generates and outputs the target opening degree instruction set.

[0096] Furthermore, in the above technical solution, the target opening degree of each valve is calculated as follows:

[0097] Based on the assigned roles of the valves, the workload of each valve is calculated. The main control valve is assigned 70% of the total throttling pressure drop / total flow rate workload, and the standby control valve is assigned 30%.

[0098] If the operator sets the command to a target flow rate, the main control valve will handle 70% of the total flow rate, and the standby control valve will handle 30% of the total flow rate. If the operator sets the command to a target bottom hole pressure, the pressure drop distribution among the valves will be determined using the formula... Determined, k and k in the formula j Valve role weights are determined based on the flow distribution of each valve, α, α j The valve resistance coefficient is determined by consulting the valve parameter table, and n is the number of valves involved in the regulation.

[0099] The valve target opening is calculated by inversely solving the valve characteristic curve. The formula for calculating the valve target opening based on the total flow rate is as follows: In the formula, K is the valve flow coefficient, representing the change in flow rate corresponding to a unit change in opening degree; R is the adjustability ratio, representing the range of flow rates that the valve can stably adjust while maintaining linear or equal percentage characteristics; the formula for calculating the target valve opening degree based on the total throttling pressure drop is: In the formula, ΔP max This is the rated pressure drop when the valve is fully open.

[0100] S5. The instruction verification module uses a safety interlock matrix to verify the target opening instruction set. If it passes, it is marked as a safe instruction set; otherwise, an alarm is triggered and the process is blocked.

[0101] Furthermore, in the above technical solution, the safety interlock matrix defines the physical position constraints between valves and the minimum safe opening difference rule; if the instruction verification module detects that an instruction violates the safety rules, it marks it as an abnormal instruction set and triggers an alarm to block execution.

[0102] In a preferred embodiment of the present invention, the core rules for defining the security interlock matrix are as follows:

[0103] Physical location constraints: The main control valve and the standby control valve must be isolated from each other and must not be arranged adjacent to each other;

[0104] Minimum safe opening difference constraint: The opening difference between the main control valve and the standby control valve must be ≥30%, the opening difference in the dual main control valve mode must be ≥20%, the opening of the main control valve must not be <10%, and when the isolation valve is in the closed state, the opening of all valves in its branch must be 0.

[0105] Dynamic operating condition constraints: When the inlet pressure fluctuation is >15%, the opening change rate of the standby valve during the activation period is limited to ≤5% / s. After the opening of the fault valve is frozen, the opening change of the adjacent compensation valve shall not exceed 30% of its rated capacity.

[0106] S6. The valve drive module receives and executes the safety instruction set, driving the corresponding valve to adjust to the target opening degree.

[0107] S7. The feedback optimization module compares the actual process parameters with the set target. If the deviation is greater than the preset threshold, it calculates the correction amount and jumps back to step 4 to update the valve target opening. Otherwise, it maintains the current command.

[0108] Furthermore, in the above technical solution, the specific analysis method of the feedback optimization module is as follows:

[0109] First, the actual process parameters are compared with the set target to calculate the deviation between the actual value and the set target, i.e., the correction amount. Then, the correction amount is allocated according to the preset allocation rules, and the correction amount is added to the original valve target opening to obtain the new valve target opening.

[0110] It should be further noted that the preset thresholds are as follows: the allowable deviation range for pressure is ±0.5 MPa, and the allowable deviation range for flow rate is ±3%.

[0111] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-valve coordinated control system for a throttling manifold control box, characterized in that, include: The system includes a data acquisition module, a data analysis module, a valve role allocation module, an instruction generation module, an instruction verification module, a valve drive module, and a feedback optimization module. Data acquisition module: Real-time acquisition of process parameters and valve status parameters; Data analysis module: Based on the target bottom hole pressure or target flow command set by the operator, and combined with the collected real-time data, calculate the total throttling pressure drop or total flow required to maintain the target; Valve Role Assignment Module: Based on preset assignment rules and parameters collected by the data acquisition module, outputs the current valve role assignment result; Instruction generation module: Based on the valve flow characteristic curve and role allocation results, the total throttling pressure drop or total flow is proportionally allocated to each valve to generate the target opening instruction set; Command verification module: Used to receive the target opening instruction set, verify it according to the safety interlock matrix, and check whether the target opening instruction in the target opening instruction set violates the safety rules; Valve drive module: Used to receive and execute the verified target opening instruction set to adjust the opening of each valve; Feedback optimization module: used to compare actual process parameters with set targets, and calculate correction amounts based on actual valve position feedback; The preset allocation rules include: When the system starts up or resets, it prioritizes selecting valves that are in good condition, choosing the valve with the lowest wear index as the main control valve, the valve with the fastest response as the backup control valve, and the valve with low wear as the standby valve. All valves must be physically isolated. When the main control valve opening is ≥90% for 30 seconds, a dual main control valve mode is adopted, and the standby control valve is upgraded to the second main control valve, with the flow distribution adjusted to 60%:40%. When the main control valve response delay is greater than 2 seconds, the main control valve is downgraded to a standby valve, and the standby control valve takes over the role of the main control valve. A new standby control valve is selected from the standby queue. When the inlet pressure fluctuation exceeds 15% of the rated value, one standby valve is activated and added to the backup group, forming a main regulating valve + dual backup regulating valve structure. The structure is restored after the pressure stabilizes. When a valve changes to a fault state, its opening is frozen, and the flow is compensated by an adjacent valve. The safety interlock matrix defines the physical position constraints between valves and the minimum safe opening difference rules; if the instruction verification module detects that an instruction violates the safety rules, it marks it as an abnormal instruction set and triggers an alarm to block execution. The specific analysis method of the feedback optimization module is as follows: First, compare the actual process parameters with the set target, calculate the deviation between the actual value and the set target, i.e. the correction amount, and then allocate the correction amount according to the allocation rules of the preset allocation rules. The correction amount is then added to the original valve target opening to obtain a new valve target opening.

2. The multi-valve coordinated control system for a throttling manifold control box as described in claim 1, characterized in that: The process parameters include the choke manifold inlet pressure, drilling fluid density, vertical well depth, wellbore length, wellbore inner diameter, flow rate in the choke manifold, and drilling fluid dynamic viscosity; the valve status parameters include the current opening degree of each valve, the actual flow rate of each valve, and its health status.

3. A multi-valve coordinated control system for a throttling manifold control box as described in claim 1, characterized in that: The specific analysis method of the data analysis module is as follows: When the target is set as the bottom hole pressure, according to the formula Calculate the required total throttling pressure drop, where ΔP is in the formula. h For the static pressure drop, ΔP f For wellbore friction pressure drop, ΔP tr For the required total throttling pressure drop, P in To throttle the manifold inlet pressure, BHP tar The target bottom hole pressure; When the target is set as traffic volume, the total traffic volume required by the system is the set value.

4. A multi-valve coordinated control system for a throttling manifold control box as described in claim 3, characterized in that: The static liquid column pressure drop ΔP h The calculation formula is: In the formula, ρ is the drilling fluid density, g is the gravitational acceleration, and H is the vertical well depth; the wellbore friction pressure drop ΔP f The calculation formula is: In the formula, f is the friction coefficient, L is the wellbore length, D is the wellbore inner diameter, and v is the drilling fluid velocity. The calculation formula is as follows: In the formula, Q represents the flow rate in the throttling manifold.

5. A multi-valve coordinated control system for a throttling manifold control box as described in claim 4, characterized in that: The friction coefficient depends on the flow regime and wellbore roughness, and its specific analysis method is as follows: Through formula Calculate the Reynolds number Re, where μ is the dynamic viscosity of the drilling fluid in the formula; When Re < 2100 ; When Re > 2100 In the formula, ε represents the roughness of the well wall.

6. A multi-valve coordinated control system for a throttling manifold control box as described in claim 1, characterized in that: The valve roles include main control valve, standby control valve, standby valve, and isolation valve; The main control valve is used to perform the core throttling task and is responsible for the main flow regulation; The standby control valve is used to assist the main control valve and undertake secondary flow regulation. It automatically takes over the main control valve's task when the main control valve fails. The standby valve is in a low-power standby state and is activated when the main control valve or the backup control valve fails or the operating conditions change suddenly. Isolation valves are used for forced closure in emergency shut-off situations to protect pipeline safety.

7. A multi-valve coordinated control method for a throttling manifold control box, wherein the method is applied to the multi-valve coordinated control system for a throttling manifold control box as described in any one of claims 1-6, characterized in that: Specifically, the following steps are included: S1. The data acquisition module collects process parameters and valve status parameters in real time. S2. The data analysis module calculates the total throttling pressure drop or total flow rate required to maintain the target based on the target bottom hole pressure or target flow rate command set by the operator, combined with the collected real-time process parameters and valve status parameters. S3. The valve role allocation module outputs the current valve role allocation result based on the preset allocation rules of valve roles and the parameters collected by the data acquisition module. S4. The instruction generation module calculates the target opening degree of each valve based on the total throttling pressure drop or total flow rate, valve role, and preset flow distribution strategy, and generates and outputs the target opening degree instruction set. S5. The instruction verification module uses a safety interlock matrix to verify the target opening instruction set. If it passes, it is marked as a safe instruction set; otherwise, an alarm is triggered and the process is blocked. S6. The valve drive module receives and executes the safety instruction set, driving the corresponding valve to adjust to the target opening degree. S7. The feedback optimization module compares the actual process parameters with the set target. If the deviation is greater than the preset threshold, it calculates the correction amount and jumps back to step S4 to update the valve target opening. Otherwise, it maintains the current command.

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