Method for preventing pump suffocation in starting process of drilling pump in petroleum drilling engineering

Abstract

The invention relates to a method for preventing pump suffocation in the starting process of a drilling pump in petroleum drilling engineering, which is characterized in that when a controller judges that the pump suffocation possibly occurs, the starting of the drilling pump is stopped, and the process is as follows: 1) collecting the flow velocity S of slurry in a high-pressure pipeline in real time; (2) a given voltage control signal V of the electric drilling pump is collected in real time; (3) when the electric drilling pump is normally started, the flow speed of slurry in the high-pressure pipeline is set to be s, and a given voltage control signal of the drilling pump is set to be v; (1) if V is larger than or equal to v and S is larger than or equal to s, it is judged that a high-pressure valve of the drilling pump is in an open state, the pump cannot be suffocated, and the drilling pump can be started; and (2) if V is larger than or equal to v and S is smaller than s, it is judged that a high-pressure valve of the drilling pump is in a closed state, and starting of the drilling pump is stopped when the pump is suffocated. The method is simple in implementation process and high in response speed, misoperation of the drilling pump can be effectively prevented, pump pressure safety protection can be timely and accurately achieved, and pump suffocation accidents are prevented and avoided.

Description

[0001] This application is a divisional application of the application with the application number 202211185913.6, the application date of September 27, 2022, and the invention title "Method for Preventing Pump Blockage during the Startup Process of a Drilling Pump in Oil Drilling Engineering". Technical Field

[0002] The present invention relates to the safety control technology of oil drilling engineering, in particular to a pump pressure protection method for preventing misoperation of a drilling pump, monitoring, and judging whether there will be pump blockage and preventive treatment in oil drilling engineering. Background Art

[0003] In oil drilling engineering, in order to prevent the drilling pump from starting under the condition that the high-pressure valve is closed, resulting in an accident of extreme pump blockage (commonly known as pump jamming), it is an effective safety protection measure to take necessary pump pressure protection measures. However, for the safe and orderly progress of production, the prerequisite for accurate and timely pump pressure protection is to accurately and timely judge whether there is a situation of pump blockage. Whether this monitoring and judgment method is accurate, efficient, and timely directly relates to the timely, efficient, and safe operation of the pump pressure protection system.

[0004] There are many methods for monitoring whether a drilling pump will have pump blockage. As for which one is the safest and most efficient? How to accurately and timely achieve accurate and timely judgment with the lowest cost and the simplest process method? This relates to the life and property safety of the collective and individuals. Therefore, it is necessary to continuously explore to achieve the race against time for safety protection and eliminate potential safety hazards.

[0005] The applicant's previously proposed invention patent "Method for Preventing Misoperation of a Drilling Pump in Oil Drilling Engineering and Its Pump Pressure Protection System" (Patent No.: 201811049380.2) proposed a method for preventing misoperation of a drilling pump in oil drilling engineering. A pressure sensor is installed on each of the drilling pump and the riser. By comparing the difference between the riser pressure and the drilling pump pressure, it is judged whether there is misoperation of the drilling pump. However, in actual application, since the fluid in the pipeline needs to accumulate to a certain extent before the fluid pressure can reach a certain value, and this process takes time. Therefore, judging whether the situation of pump jamming will occur by comparing the changes in the riser pressure and the drilling pump pressure requires a relatively long reaction time, which is not conducive to preventing accidents in the first place.

[0006] Therefore, the applicant has conducted discussions and exploratory attempts on various technical ideas, and the purpose is only one, that is, to achieve timely and accurate pump pressure safety protection and effectively protect the life and property safety of the people. Summary of the Invention

[0007] In order to achieve timely and accurate pump pressure safety protection, the present invention proposes a method for preventing a drilling pump from being blocked. Several prediction and judgment methods adopt a systematic technical concept, and can accurately judge whether there is a situation of blocked pump in the first time.

[0008] The technical solution adopted by the present invention: A method for preventing a drilling pump from being blocked during the startup process of an oil drilling engineering drilling pump. When it is judged that there may be a situation of blocked pump, the startup of the drilling pump is stopped. The process executed by the controller is as follows: 1) Collect the rotational speed R of the drilling pump in real time; 2) Collect the mud flow rate S in the high-pressure pipeline in real time; 3) Set that when the drilling pump starts normally, when the operating speed of the drilling pump is r, the mud flow rate in the high-pressure pipeline is s; (1) If R≥r and S≥s, it is judged that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of blocked pump, and the drilling pump is started normally; (2) If R≥r and S<s, it is judged that the high-pressure valve of the drilling pump is in the closed state, and it is predicted that there will be a situation of blocked pump, and the startup of the drilling pump is stopped.

[0009] A method for preventing a drilling pump from being blocked during the startup process of an oil drilling engineering drilling pump. Executed by the controller, when it is judged that there may be a situation of blocked pump, the startup of the drilling pump is stopped. The process is as follows: 1) Collect the rotational speed R of the drilling pump in real time; 2) Collect the mud pressure LP in the riser in real time; 3) Set that when the drilling pump starts normally, when the operating speed of the drilling pump is r, the mud pressure in the riser is lp; (1) If R≥r and LP≥lp, it is judged that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of blocked pump, and the drilling pump can be started; (2) If R≥r and LP<lp, it is judged that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of blocked pump, and the startup of the drilling pump is stopped.

[0010] A method for preventing a drilling pump from being blocked during the startup process of an oil drilling engineering drilling pump. It is executed by the controller. When it is judged that there may be a situation of blocked pump, the startup of the drilling pump is stopped. The process is as follows: Collect the mud flow rate S in the high-pressure pipeline in real time; Collect the given voltage control signal V of the electric drilling pump in real time; 3) Set that when the electric drilling pump starts normally, the mud flow rate in the high-pressure pipeline is s, and the given voltage control signal of the drilling pump is v; (1) If V ≥ v and S ≥ s, it is determined that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump choking, so the drilling pump can be started; (2) If V ≥ v and S < s, it is determined that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of pump choking, so stop starting the drilling pump.

[0011] A method for preventing pump choking during the start-up process of a drilling pump in oil drilling engineering, which is executed by a controller. When it is determined that there may be a situation of pump choking, stop starting the drilling pump. The process is as follows: 1) Real-time collect the mud pressure LP in the riser; 2) Collect the given voltage control signal V of the electric drilling pump; 3) Set that when the electric drilling pump starts normally, the mud pressure in the riser is lp, and the given voltage control signal of the drilling pump is v; (1) If V ≥ v and LP ≥ lp, it is determined that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump choking, so the drilling pump can be started; (2) If V ≥ v and LP < lp, it is determined that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of pump choking, so stop starting the drilling pump.

[0012] A method for preventing pump choking during the start-up process of a drilling pump in oil drilling engineering, which is executed by a controller. When it is determined that there may be a situation of pump choking, the process of stopping starting the drilling pump is as follows: 1) Real-time collect the mud pressure BP of the drilling pump; 2) Real-time collect the mud flow rate S in the high-pressure pipeline; 3) Set that when the drilling pump starts normally, when the mud pressure of the drilling pump is bp, the mud flow rate in the high-pressure pipeline is s; (1) If BP ≥ bp and S ≥ s, it is determined that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump choking, so the drilling pump can be started normally; (2) If BP ≥ bp and S < s, it is determined that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of pump choking, so stop starting the drilling pump.

[0013] For the method of preventing pump choking of the drilling pump, the flow rate sensor installed on the pipeline downstream of the high-pressure valve can be a flow rate sensor in contact with the measured fluid or a flow rate sensor non-contact with the measured fluid.

[0014] The method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering. For a mechanical drilling pump (pump pressure protection system), a normally open solenoid valve is connected in series to the start-stop control air circuit of the drilling pump. The normally open solenoid valve is controlled by a controller. When the controller determines that the high-pressure valve of the drilling pump is in the closed state and there will be a situation of pump jamming, it issues a control instruction to open the normally closed pneumatic valve to relieve pressure. At the same time, the normally open solenoid valve closes, cutting off the control air circuit of the drilling pump and stopping the operation of the drilling pump.

[0015] The method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering. For an electric drilling pump (pump pressure protection system), the controller is associated with and intervenes in the start-stop control system of the electric drilling pump. When it is determined that the high-pressure valve of the drilling pump is in the closed state and there will be a situation of pump jamming, the controller issues a control instruction to open the normally closed pneumatic valve to relieve pressure. At the same time, the start-stop control system of the drilling pump receives the stop pump instruction issued by the controller, stopping the operation of the drilling pump.

[0016] A pump pressure protection system for preventing pump jamming in the startup process of a drilling pump in oil drilling engineering, which realizes the method for preventing pump jamming as described in any of the previous items. During the startup process of the drilling pump, it predicts and judges whether there will be a situation of pump jamming. A normally closed pneumatic valve is installed on the low-pressure return water pipeline of the drilling pump as the low-pressure return water valve of the drilling pump. The actuator controlling the opening and closing of the normally closed pneumatic valve is controlled by a controller. When the controller determines that the high-pressure valve of the drilling pump is in the closed state and there will be a situation of pump jamming, it issues a control instruction to stop starting the drilling pump and at the same time opens the normally closed pneumatic valve to relieve pressure.

[0017] Advantages of the invention: 1. The method for preventing pump jamming during the startup process of the drilling pump in oil drilling engineering of the present invention judges whether the high-pressure valve of the drilling pump is in the open state by real-time monitoring of the running speed of the drilling pump pulley and the flow rate and / or mud pressure signal of the mud in the high-pressure pipeline of the drilling pump, and then judges whether there will be a situation of pump jamming. The implementation process is simple, the reaction speed is fast, and the imaging is more intuitive. It can prevent misoperation of the drilling pump, effectively preventing and avoiding pump jamming accidents.

[0018] The method for preventing pump jamming during the startup process of the drilling pump in oil drilling engineering of the present invention judges whether the high-pressure valve of the drilling pump is in the open state by real-time monitoring of the mud pressure signal at the outlet of the electric drilling pump and the flow rate of the mud in the high-pressure pipeline of the drilling pump, and then judges whether there will be a situation of pump jamming. The implementation process is simple, the reaction speed is fast, it can prevent misoperation of the drilling pump, effectively preventing and avoiding pump jamming accidents.

[0019] The method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering of the present invention determines whether the high-pressure valve of the drilling pump is in an open state and whether there will be a situation of pump jamming by real-time monitoring of the given voltage control signal of the drilling pump and the flow rate and / or pressure signal of the mud in the high-pressure pipeline of the drilling pump. Starting from the source of danger, it advances the prediction and judgment checkpoint, with high speed, good effect, timely and accurate, and low cost achieved.

[0020] The method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering of the present invention can be implemented without changing the hardware of the existing pump pressure protection system, without increasing equipment costs, is easy to implement, ensures the safe production of oil drilling, and has good social and economic benefits. In practical applications, various judgment methods such as detecting the running speed of the drilling pump pulley, the flow rate of the mud in the high-pressure pipeline of the drilling pump, and collecting the given voltage control signal of the electric drilling pump can be combined and used to verify each other, with higher accuracy.

[0021] 5. The method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering of the present invention uses an accurate and simple method to predict and judge whether there will be a situation of pump jamming during the startup process of the drilling pump, and installs a normally closed pneumatic valve on the low-pressure return water pipeline of the drilling pump as the low-pressure return water valve of the drilling pump. The actuator that controls the opening and closing of the normally closed pneumatic valve is controlled by a controller. When the controller determines that the high-pressure valve of the drilling pump is in a closed state and there will be a situation of pump jamming, it issues a control instruction to open the normally closed pneumatic valve to relieve pressure. It can effectively prevent misoperation of the drilling pump and prevent and avoid pump jamming accidents. Brief Description of the Drawings

[0022] Figure 1 、 Figure 3 、 Figure 5 、 Figure 9 is a schematic structural diagram of the pump pressure protection system for preventing pump jamming of a mechanical drilling pump; Figure 2 、 Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 10 is a schematic structural diagram of the pump pressure protection system of an electric drilling pump; In the figure, label 1 is a flow rate sensor; 2 is a high-pressure valve; 3 is a pump speed sensor; 4 is a low-pressure return water valve; 5 is a solenoid valve; 6 is a pump control switch; 7 is a handwheel setting; 8 is a riser pressure sensor; 9 is a pump pressure sensor; 10 is a normally closed pneumatic valve. Detailed Embodiment

[0023] The technical solution of the present invention will be further described in detail below through specific embodiments in conjunction with the drawings. Embodiment

[0024] As Figure 1 、Figure 2 As shown in Figure 2 , the method for preventing pump choking during the startup process of a drilling pump in the oil drilling engineering of the present invention includes the following steps: Install a pump speed sensor on the drilling pump to collect the operating speed R of the drilling pump, and transmit the rotational speed signal to the controller; install a flow rate sensor on the pipeline downstream of the high-pressure valve to collect the mud flow rate S in the high-pressure pipeline, and transmit the flow rate signal to the controller. When the drilling pump is set to start normally, when the operating speed of the drilling pump is r, the mud flow rate in the high-pressure pipeline is s; when the drilling pump starts, the controller real-time collects the operating speed of the drilling pump and the mud flow rate in the high-pressure pipeline; calculates the operating speed R of the drilling pump and the mud flow rate S in the high-pressure pipeline in real time, and compares them with the operating speed r of the drilling pump and the mud flow rate s in the high-pressure pipeline under the normal startup state to determine whether there is a situation of pump choking in the drilling pump: (1) If R≥r and S≥s, it is determined that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump choking, and the drilling pump can start. (2) If R≥r and S<s, it is determined that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of pump choking, and the drilling pump cannot start.

[0025] Logically speaking, when the drilling pump starts, by using the four elements of R, r, S, and s to determine whether there is a situation of pump choking in the drilling pump. In addition to the above two logical combinations, there are the following two logical combinations, namely: (3) If R<r, S<s or S = 0, it is determined that the drilling pump is in the idle state, and this situation is not dangerous. (4) If R<r, but S≥s, it can basically be determined that the sensor is damaged or there is a problem with the drilling pump. Because in real life and production practice, there is no situation where the drilling pump fails to operate normally and outputs a large amount of energy (the fluid being transported will not obtain kinetic energy and flow in the pipeline). Therefore, it can be determined that the sensor is damaged or there is a problem with the drilling pump itself.

[0026] Since the present invention focuses on researching the method for preventing and avoiding pump choking when the drilling pump starts, for the four logical combination judgments of the four elements of R, r, S, and s, only the first two situations are studied here. Embodiment

[0027] See Figure 3 、 Figure 4, the method for preventing pump jamming during the startup process of a drilling pump in an oil drilling project of this embodiment is realized as follows: Install a pump speed sensor on the drilling pump to collect the operating speed R of the drilling pump, and transmit the rotational speed signal to the controller. Install a pressure sensor on the riser to collect the mud pressure LP in the riser, and transmit the pressure signal to the controller. When the drilling pump is normally started, it is pre-set that when the operating speed of the drilling pump is r (r > 0), the mud pressure in the riser is lp (lp > 0); the controller executes the following program steps to determine whether there is a pump jamming situation in the drilling pump: When the drilling pump starts, collect the operating speed of the drilling pump and the mud pressure in the standpipe in real time; Calculate the operating speed R of the drilling pump and the mud pressure LP in the standpipe in real time, and compare them with the operating speed r of the drilling pump and the mud flow rate lp in the high-pressure pipeline under the normal startup state: (1) If R ≥ r and LP ≥ lp, it is determined that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump jamming, and the drilling pump can start; (2) If R ≥ r and LP < lp, it is determined that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of pump jamming, and the drilling pump cannot start. Embodiment

[0028] See Figure 7 , the method for preventing pump jamming during the startup process of a drilling pump in an oil drilling project of this embodiment is as follows: Install a flow rate sensor on the pipeline downstream of the high-pressure valve to collect the mud flow rate S in the high-pressure pipeline in real time, and transmit the flow rate signal to the controller. At the same time, the controller collects the given voltage control signal V of the electric drilling pump in real time. The controller executes the following program to determine whether there is a pump jamming situation in the drilling pump: 1) When the drilling pump is normally started, the given voltage control signal of the electric drilling pump is v, and the mud flow rate in the high-pressure pipeline is s; 2) When the drilling pump starts, collect the given voltage control signal of the electric drilling pump and the mud flow rate in the high-pressure pipeline in real time; 3) Calculate the given voltage control signal V of the electric drilling pump and the mud flow rate S in the high-pressure pipeline in real time, and compare them with the given voltage control signal v of the electric drilling pump and the mud flow rate s in the high-pressure pipeline under the normal startup state: (1) If V ≥ v and S ≥ s, it is determined that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump jamming, and the drilling pump can start; (2) If V ≥ v and S < s, it is determined that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of pump jamming, and the drilling pump cannot start. Embodiment

[0029] See Figure 8, the method for preventing pump jamming during the startup of a drilling pump in an oil drilling project in this embodiment includes the following steps: Install a pressure sensor on the riser to collect the mud pressure LP in the riser in real time, and transmit the pressure signal to the controller. At the same time, the controller collects the given voltage control signal V of the electric drilling pump in real time. The process executed by the controller is as follows: 1) When setting the normal startup of the drilling pump, the given voltage control signal of the electric drilling pump is v, and the mud pressure in the riser is lp (lp > 0); 2) When the drilling pump starts up, collect the given voltage control signal of the electric drilling pump and the mud pressure in the riser in real time; 3) Calculate the given voltage control signal V of the electric drilling pump and the mud pressure LP in the riser in real time, and compare them with the given voltage control signal v of the electric drilling pump and the mud pressure lp in the riser under the normal startup state: (1) If V ≥ v and LP ≥ lp, it is judged that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump jamming, and the drilling pump can start; (2) If V ≥ v and LP < lp, it is judged that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of pump jamming, and the drilling pump cannot start. Embodiment

[0030] See Figure 5 、 Figure 6 , the method for preventing pump jamming during the startup of a drilling pump in an oil drilling project in this embodiment can be executed by the controller. The process of judging whether the drilling pump is jammed when starting up is as follows: Install a pressure sensor on the outlet pipeline of the drilling pump to collect the mud pressure BP of the drilling pump in real time, and transmit the pressure signal to the controller. Install a flow velocity sensor on the pipeline downstream of the high-pressure valve to collect the mud flow velocity S in the high-pressure pipeline in real time, and transmit the flow velocity signal to the controller; 1) When setting the normal startup of the drilling pump, when the mud pressure of the drilling pump is bp (bp > 0), the mud flow velocity in the high-pressure pipeline is s; 2) When the drilling pump starts up, collect the mud pressure of the drilling pump and the mud flow velocity in the high-pressure pipeline in real time; 3) Calculate the mud pressure BP of the drilling pump and the mud flow velocity S in the high-pressure pipeline in real time, and compare them with the mud pressure bp of the drilling pump and the mud flow velocity s in the high-pressure pipeline under the normal startup state: (1) If BP ≥ bp and S ≥ s, it is judged that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump jamming, and the drilling pump can start; (2) If BP ≥ bp and S < s, it is judged that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of pump jamming, and the drilling pump cannot start. Embodiment

[0031] The method for preventing pump choking during the startup of a drilling pump in an oil drilling project of this embodiment is different from the foregoing embodiments in that, further: a normally closed pneumatic valve is installed on the low-pressure return water pipeline of the drilling pump as the low-pressure return water valve of the drilling pump. The actuator for opening and closing the normally closed pneumatic valve is controlled by a controller. When the controller determines that the high-pressure valve of the drilling pump is in a closed state and there may be a situation of pump choking, the controller issues an instruction to open the normally closed pneumatic valve to relieve pressure. Embodiment

[0032] See Figure 9 As shown in [figure reference], the method for preventing pump choking during the startup of a drilling pump in an oil drilling project of this embodiment is different from the foregoing embodiments in that, further: for a mechanical drilling pump, a normally closed pneumatic valve is installed on the low-pressure return water pipeline of the drilling pump as the low-pressure return water valve 10 of the drilling pump, and a normally open solenoid valve is connected in series to the start-stop control air circuit of the drilling pump. The normally open solenoid valve is controlled by a controller. When the controller determines that the high-pressure valve of the drilling pump is in a closed state and there may be a situation of pump choking, a control instruction is issued to open the normally closed pneumatic valve to relieve pressure. At the same time, the normally open solenoid valve is closed to cut off the control air circuit of the drilling pump, causing the drilling pump to stop running. Embodiment

[0033] See Figure 10 As shown in [figure reference], the method for preventing pump choking during the startup of a drilling pump in an oil drilling project of this embodiment is different from the foregoing embodiments in that, further: for an electric drilling pump, a normally closed pneumatic valve is installed on the low-pressure return water pipeline of the drilling pump as the low-pressure return water valve 10 of the drilling pump. The controller is associated with and intervenes in the start-stop control system of the electric drilling pump. When it is determined that the high-pressure valve of the drilling pump is in a closed state and there may be a situation of pump choking, the controller issues a control instruction to open the normally closed pneumatic valve to relieve pressure. At the same time, the start-stop control system of the drilling pump receives the pump stop instruction issued by the controller, causing the drilling pump to stop running.

[0034] The method for preventing pump choking during the startup of a drilling pump in an oil drilling project of the present invention can adopt a combined method in practical applications, and comprehensively compare and judge using several interrelated parameters to increase the accuracy and reliability of the judgment. Embodiment

[0035] This embodiment provides a method for comprehensively comparing and judging several parameters to monitor and judge whether the drilling pump chokes during startup. The specific process is as follows: 1) Real-time collect the rotational speed R of the drilling pump; 2) Real-time collect the mud flow rate S in the high-pressure pipeline; 3) Real-time collect the mud pressure LP in the riser; 4) When the drilling pump starts normally and the operating speed of the drilling pump is r, the mud flow rate in the high-pressure pipeline is s, and the mud pressure in the riser is lp; the controller makes the following judgments based on the collected rotational speed R of the drilling pump, the mud flow rate S in the high-pressure pipeline, and the mud pressure LP in the riser; (1) If R≥r and S≥s and LP≥lp, it is determined that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump choking, and the drilling pump is started normally; (2) If R≥r and S<s and LP<lp, it is determined that the high-pressure valve of the drilling pump is in the closed state, and it is predicted that there will be a situation of pump choking, and the start of the drilling pump is stopped.

Claims

1. A method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering, characterized in that: Executed by the controller, when it is judged that there may be a situation of pump jamming, the start of the drilling pump is stopped, and the process is as follows: Collect the mud flow rate S in the high-pressure pipeline in real time; Collect the given voltage control signal V of the electric drilling pump in real time; Set that when the electric drilling pump starts normally, the mud flow rate in the high-pressure pipeline is s, and the given voltage control signal of the drilling pump is v; (1) If V≥v and S≥s, it is judged that the high-pressure valve of the drilling pump is in the open state, and there will be no situation of pump jamming, and the drilling pump can be started; (2) If V≥v and S<s, it is judged that the high-pressure valve of the drilling pump is in the closed state, and there is a situation of pump jamming, and the start of the drilling pump is stopped.

2. The method for preventing pump jamming during the startup of a drilling pump in oil drilling engineering according to claim 1, characterized in that: for For a mechanical drilling pump, a normally open solenoid valve is connected in series in the start-stop control air circuit of the drilling pump. The normally open solenoid valve is connected to the controller. When the controller judges that the high-pressure valve of the drilling pump is in the closed state and there will be a situation of pump jamming, a control instruction is sent to close the normally open solenoid valve, cutting off the control air circuit of the drilling pump and stopping the operation of the drilling pump.

3. The method for preventing pump jamming during the startup of a drilling pump in oil drilling engineering according to claim 2, characterized in that: A normally closed pneumatic valve is installed on the low-pressure return water pipeline of the drilling pump as the low-pressure return water valve of the drilling pump. The normally closed pneumatic valve is controlled and connected to the controller. When the controller judges that there is a situation of pump jamming, a control instruction is sent to open the normally closed pneumatic valve to relieve pressure.

4. The method for preventing pump jamming during the startup of a drilling pump in oil drilling engineering according to claim 1, 2 or 3, characterized in that: for For an electric drilling pump, the controller is associated with and intervenes in the start-stop control system of the electric drilling pump. When the controller judges that the high-pressure valve of the drilling pump is in the closed state and there will be a situation of pump jamming, a pump stop control instruction is sent to the start-stop control system of the drilling pump to stop the operation of the drilling pump.

5. The method for preventing pump jamming during the startup of a drilling pump in oil drilling engineering according to claim 4, characterized in that: A normally closed pneumatic valve is installed on the low-pressure return water pipeline of the drilling pump as the low-pressure return water valve of the drilling pump. The normally closed pneumatic valve is controlled and connected to the controller. When the controller judges that there is a situation of pump jamming, a control instruction is sent to open the normally closed pneumatic valve to relieve pressure.

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