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, and the method stops starting the drilling pump when a controller judges that the pump suffocation possibly occurs, and comprises the following steps: 1) collecting the slurry pressure BP of the drilling pump in real time; (2) the slurry flow velocity S in the high-pressure pipeline is collected in real time; (3) when the drilling pump is normally started, the slurry pressure of the drilling pump is set to be bp, and the slurry flow speed in the high-pressure pipeline is set to be s; (1) if BP is larger than or equal to bp 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 situation that the pump is suffocated cannot happen, and the drilling pump can be normally started; (2) if BP is larger than or equal to bp and S is smaller than s, it is judged that a high-pressure valve of the drilling pump is in a closed state, the situation that the pump is blocked occurs, and starting of the drilling pump is stopped. 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: September 27, 2022, and the invention name "Method for Preventing Pump Choking during the Starting Process of Drilling Pumps in Oil Drilling Engineering". Technical Field

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

[0003] In oil drilling engineering, in order to prevent the drilling pump from starting when the high-pressure valve is closed, which may lead to extreme pump choking (commonly known as pump jamming), necessary pump pressure protection measures are effective safety protection means. However, for the safe and orderly progress of production, the premise of accurate and timely pump pressure protection is to accurately and timely judge whether there is a situation of pump choking. 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 be choked. As for which one is the safest and most efficient? How to accurately and timely judge with the lowest cost and the simplest process method? This is related 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 previously proposed the invention patent "Method for Preventing Misoperation of Drilling Pumps in Oil Drilling Engineering and Its Pump Pressure Protection System" (Patent No.: 201811049380.2), which proposed a method for preventing misoperation of drilling pumps 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. Summary of the Invention

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

[0008] The technical solution adopted by the present invention: A method for preventing pump jamming during the startup of a drilling pump in oil drilling engineering. When it is judged that pump jamming may occur, the startup of the drilling pump is stopped. The process executed by the controller 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) 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 pump jamming, 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 pump jamming, and the startup of the drilling pump is stopped.

[0009] A method for preventing pump jamming during the startup of a drilling pump in oil drilling engineering. Executed by the controller, when it is judged that pump jamming may occur, the startup of the drilling pump is stopped. The process is as follows: 1) Real-time collect the rotational speed R of the drilling pump; 2) Real-time collect the mud pressure LP in the riser; 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 pump jamming, 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 pump jamming, and the startup of the drilling pump is stopped.

[0010] A method for preventing pump jamming during the startup of a drilling pump in oil drilling engineering. It is executed by the controller. When it is judged that pump jamming may occur, the startup of the drilling pump is stopped. The process is as follows: Real-time collect the mud flow rate S in the high-pressure pipeline; Real-time collect the given voltage control signal V of the electric drilling pump; 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 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 startup of the drilling pump is stopped.

[0011] A method for preventing pump jamming during the startup of a drilling pump in oil drilling engineering, which is executed by a controller. When it is judged that pump jamming may occur, the startup of the drilling pump is stopped. 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) When the electric drilling pump starts normally, set the mud pressure in the riser as lp and the given voltage control signal of the drilling pump as v; (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 be started; (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 startup of the drilling pump is stopped.

[0012] A method for preventing pump jamming during the startup of a drilling pump in oil drilling engineering, which is executed by a controller. When it is judged that pump jamming may occur, the process of stopping the startup of 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) When the drilling pump starts normally, set the mud pressure of the drilling pump as bp and the mud flow rate in the high-pressure pipeline as s; (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 be started normally; (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 startup of the drilling pump is stopped.

[0013] For the method of preventing pump jamming 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 not in contact with the measured fluid.

[0014] For the method of preventing pump jamming during the startup of the drilling pump in oil drilling engineering, for a mechanical drilling pump (pump pressure protection system), a normally open solenoid valve is connected in series on the start-stop control air circuit of the drilling pump. The normally open solenoid valve is controlled by 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 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, so that the drilling pump stops running.

[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 judged 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 for pressure relief. At the same time, the start-stop control system of the drilling pump receives the pump stop instruction issued by the controller and stops the operation of the drilling pump.

[0016] A pump pressure protection system for preventing pump jamming during 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 for controlling the opening and closing of the normally closed pneumatic valve is controlled by 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, it issues a control instruction to stop starting the drilling pump and at the same time opens the normally closed pneumatic valve for pressure relief.

[0017] Advantages of the invention: 1. The method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering according to 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 of the mud or / and the mud pressure signal 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 picture is more intuitive. It can prevent misoperation of the drilling pump and effectively prevent and avoid pump jamming accidents.

[0018] The method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering according to 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, and effectively prevent and avoid pump jamming accidents.

[0019] The method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering according to the present invention judges whether the high-pressure valve of the drilling pump is in the 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 or / and pressure signal of the mud in the high-pressure pipeline of the drilling pump. Starting from the source of danger, moving the prediction and judgment checkpoint forward, with fast speed, good effect, timely and accurate, and low implementation cost.

[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 is 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 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. 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 are schematic structural diagrams 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 are schematic structural diagrams of the pump pressure protection system of an electric drilling pump; In the figure, reference numeral 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 standpipe pressure sensor; 9 is a pump pressure sensor; 10 is a normally closed pneumatic valve. Detailed Embodiments

[0023] The following further describes the technical solution of the present invention in detail through specific embodiments in conjunction with the drawings. Embodiment

[0024] As Figure 1 、 Figure 2 shown, the method for preventing pump jamming during the startup process of a drilling pump in oil drilling engineering of the present invention includes the following steps: Install a pump speed sensor on the drilling pump to collect the running speed R of the drilling pump and transmit the rotation speed signal to the controller; Install a flow rate sensor on the pipeline downstream of the high-pressure valve to collect the flow rate S of the mud in the high-pressure pipeline and transmit the flow rate signal to the controller; When the drilling pump is set to start normally and 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 collects the operating speed of the drilling pump and the mud flow rate in the high-pressure pipeline in real time; 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 start 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, that is: (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 focus of the present invention is to study how to prevent and avoid pump choking when the drilling pump starts, therefore, 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 In this embodiment, a method for preventing pump choking during the start-up process of a drilling pump in oil drilling engineering is 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 mud pressure LP pressure sensor on the riser to collect the mud pressure in the riser, and transmit the pressure signal to the controller; pre-set that when the drilling pump starts normally and 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 situation of pump choking in the drilling pump: When the drilling pump starts, collect the operating speed of the drilling pump and the mud pressure in the standpipe pipeline 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 normal startup conditions: (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 be started; (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 be started. Embodiment

[0028] See Figure 7 , in the method for preventing pump jamming during the startup process of the drilling pump in the oil drilling engineering of this embodiment, the process is as follows: 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. 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 situation of pump jamming in the drilling pump: 1) When the drilling pump starts normally, set the given voltage control signal of the electric drilling pump as v, and the mud flow velocity in the high-pressure pipeline as s; 2) When the drilling pump starts, collect the given voltage control signal of the electric drilling pump and the mud flow velocity 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 velocity 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 velocity s in the high-pressure pipeline under normal startup conditions: (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 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 jamming, and the drilling pump cannot be started. Embodiment

[0029] See Figure 8 , in the method for preventing pump jamming during the startup process of the drilling pump in the oil drilling engineering of this embodiment, the steps are as follows: 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 the drilling pump starts normally, set the given voltage control signal of the electric drilling pump as v, and the mud pressure in the riser as lp (lp>0); 2) When the drilling pump starts, 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 normal startup conditions: (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, and 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, and the drilling pump cannot be started. Embodiment

[0030] See Figure 5 、 Figure 6 In this embodiment, a method for preventing pump choking during the startup process of a drilling pump in an oil drilling project can be executed by a controller. The process of determining whether there is pump choking when the drilling pump starts 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 the drilling pump starts normally, 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, 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 normal startup conditions: (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, and the drilling pump can be started; (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, and the drilling pump cannot be started. Embodiment

[0031] The method for preventing pump choking during the startup process of a drilling pump in an oil drilling project in this embodiment is different from the foregoing embodiments. Further: Install a normally closed pneumatic valve on the low-pressure return pipeline of the drilling pump as the low-pressure return valve of the drilling pump. The opening and closing actuator of the normally closed pneumatic valve is controlled by the controller. When the controller determines that the high-pressure valve of the drilling pump is in the 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, in the method for preventing pump jamming during the startup process of a drilling pump in an oil drilling project according to this embodiment, different from the foregoing embodiments, 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 the closed state and there will be a situation of pump jamming, a control instruction is issued to open the normally closed pneumatic valve to relieve pressure, and at the same time, the normally open solenoid valve is closed to cut off the control air circuit of the drilling pump, so that the drilling pump stops running. Embodiment

[0033] See Figure 10 , in the method for preventing pump jamming during the startup process of a drilling pump in an oil drilling project according to this embodiment, different from the foregoing embodiments, 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, and 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, and at the same time, the start-stop control system of the drilling pump receives the pump stop instruction issued by the controller, so that the drilling pump stops running.

[0034] The method for preventing pump jamming during the startup process of a drilling pump in an oil drilling project according to the present invention can be adopted in a combined manner in practical applications, and several mutually related sets of parameters are combined for comprehensive comparison and judgment 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 there is pump jamming during the startup process of a drilling pump. 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 is normally started, set the operating speed of the drilling pump to r, the mud flow rate in the high-pressure pipeline to s, and the mud pressure in the riser to 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 judged that the high-pressure valve of the drilling pump is in the open state, there will be no situation of pump jamming, and the drilling pump is normally started; (2) If R≥r and S<s and LP<lp, 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 pump jamming, and the startup 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 choking, the start of the drilling pump is stopped, and the process is as follows: Collect the mud pressure BP of the drilling pump in real time; Collect the mud flow rate S in the high-pressure pipeline in real time; When the drilling pump starts normally, set the mud pressure of the drilling pump to bp and the mud flow rate in the high-pressure pipeline to s; (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 choking, and the drilling pump can start normally; (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 choking, 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 on 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 choking, 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 process of a drilling pump in oil drilling engineering according to claim 2, characterized in that: Install 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 normally closed pneumatic valve is controlled and connected to the controller. When the controller judges that there is a situation of pump choking, 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 process 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 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 choking, 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 process of a drilling pump in oil drilling engineering according to claim 4, characterized in that: Install 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 normally closed pneumatic valve is controlled and connected to the controller. When the controller judges that there is a situation of pump choking, a control instruction is sent to open the normally closed pneumatic valve to relieve pressure.

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