Control method of pressure test pump and pressure test pump

Abstract

The embodiments of the present application relate to the technical field of test pumps, and disclose a control method for a pressure test pump and a pressure test pump, wherein the pressure test pump includes a test cylinder, a temperature control module and a pressure regulating module, wherein the test cylinder is used to load a test product. The control method includes: obtaining temperature configuration information and pressure configuration information, and controlling the temperature control module to adjust the temperature in the test cylinder according to the temperature configuration information; and controlling the pressure regulating module to adjust the pressure in the test cylinder according to the pressure configuration information. In this embodiment, the temperature in the test cylinder is adjusted based on the temperature configuration information, and the pressure in the test cylinder is adjusted based on the pressure configuration information, so that the temperature and pressure in the test cylinder can be accurately controlled according to the instructions of the configuration information. The pressure test pump can automatically provide the temperature and pressure required for each stage of the test cycle.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of test pumps, and in particular to a control method for a pressure test pump and a pressure test pump. Background Art

[0002] In the design of various pressure-bearing structural parts, hydraulic tests are required: a certain pressure is applied to the pressure-bearing workpiece to test the structural parts. For example, in oil production, downhole sensors need to simulate downhole working conditions for environmental testing, that is, high temperature and high pressure testing is required.

[0003] A pressure test pump is usually used to perform environmental tests such as high temperature and high pressure on various test products. In some solutions known to the inventor of the present application, the pressure test pump needs to be manually controlled, and the operator adjusts the temperature by operating the button and the pressure by operating the knob according to the monitoring time. However, the manually controlled pressure test pump not only provides a low accuracy of temperature or pressure, but also requires the operator to monitor the entire test cycle, and cannot achieve automated testing. Summary of the invention

[0004] In view of this, some embodiments of the present application provide a control method for a pressure test pump and a pressure test pump, which can accurately control pressure and temperature and automatically provide the temperature and pressure required for each stage of the test cycle.

[0005] In a first aspect, some embodiments of the present application provide a control method for a pressure test pump, the pressure test pump comprising a test cylinder, a temperature adjustment module and a pressure adjustment module, wherein the test cylinder is used to load a test product;

[0006] Control methods include:

[0007] Get temperature configuration information and pressure configuration information;

[0008] According to the temperature configuration information, the temperature adjustment module is controlled to adjust the temperature in the test cylinder;

[0009] According to the pressure configuration information, the pressure regulating module is controlled to regulate the pressure in the test cylinder.

[0010] In some embodiments, the pressure regulating module includes a hydraulic pump and a pressure gauge, and the pressure gauge is used to detect the pressure in the test cylinder;

[0011] The aforementioned method of controlling the temperature adjustment module to adjust the temperature in the test cylinder according to the temperature configuration information includes:

[0012] Control the hydraulic pump to inject liquid medium into the test cylinder and obtain the real-time pressure collected by the pressure gauge;

[0013] If the real-time pressure reaches the first pressure value, the temperature adjustment module is controlled to heat the test cylinder according to the temperature configuration information, so that the temperature of the test cylinder reaches the temperature required for the test and is maintained at the temperature required for the test.

[0014] In some embodiments, the temperature adjustment module includes a first heating section and a second heating section, the first heating section is used to heat the upper section of the test cylinder, and the second heating section is used to heat the lower section of the test cylinder, and the temperature configuration information includes a first set temperature and a second set temperature, and the second set temperature is greater than the first set temperature;

[0015] The aforementioned method of controlling the temperature adjustment module to heat the liquid medium in the test cylinder according to the temperature configuration information so that the temperature of the test cylinder reaches the temperature required for the test includes:

[0016] The first heating section is controlled to heat at a first set temperature, and the second heating section is controlled to heat at a second set temperature, so that the temperature of the test tube reaches the temperature required for the test.

[0017] In some embodiments, the aforementioned controlling the first heating section to heat at a first set temperature and controlling the second heating section to heat at a second set temperature includes:

[0018] Using a PID algorithm to control the first heating section to heat at a first set temperature; and / or,

[0019] The PID algorithm is used to control the second heating section to heat according to the second set temperature.

[0020] In some embodiments, the aforementioned controlling the pressure regulating module to adjust the pressure in the test cylinder according to the pressure configuration information includes:

[0021] After the temperature of the test cylinder reaches the required temperature for the test for the first time, the pressure regulating module is controlled to regulate the pressure in the test cylinder according to the pressure configuration information.

[0022] In some embodiments, the pressure regulating module further comprises a slow pressure relief valve, which is used to release the pressure in the test cylinder at a first speed;

[0023] The aforementioned controlling the pressure regulating module to adjust the pressure in the test cylinder according to the pressure configuration information includes:

[0024] Controlling the slow pressure relief valve to open, so as to reduce the real-time pressure in the test cylinder to a second pressure value;

[0025] The working state of the hydraulic pump and the opening state of the slow-release valve are controlled so that the real-time pressure in the test cylinder meets the pressure configuration information.

[0026] In some embodiments, the pressure test pump further includes an alarm, and the control method further includes:

[0027] Determine whether pressure leakage occurs based on real-time pressure;

[0028] If it is determined that a pressure leak has occurred, the alarm will be controlled to sound an alarm and the hydraulic pump will be controlled to stop working.

[0029] In some embodiments, the foregoing determination of whether a pressure leak occurs based on the real-time pressure includes:

[0030] If the pressure at the current moment is less than or equal to a preset percentage of the pressure at the previous moment, it is determined that a pressure leak has occurred.

[0031] In some embodiments, the pressure test pump further includes a quick pressure relief valve, which is used to release the pressure in the test cylinder at a speed greater than the first speed; the control method further includes:

[0032] When the entire test cycle is completed according to the pressure configuration information, the quick pressure relief valve is controlled to open to release the pressure in the test cylinder.

[0033] In a second aspect, some embodiments of the present application provide a pressure test pump, characterized in that it includes:

[0034] A test cylinder, used to load the test product;

[0035] A temperature control module, used to adjust the temperature in the test cylinder;

[0036] A pressure regulating module, used for regulating the pressure in the test cylinder;

[0037] A controller is electrically connected to the temperature regulating module and the voltage regulating module, and is used to execute the control method of the first aspect.

[0038] Beneficial effects of the embodiments of the present application: Different from the prior art, the control method of the pressure test pump provided in the embodiments of the present application includes a test cylinder, a temperature adjustment module and a pressure adjustment module, wherein the test cylinder is used to load the test product. The control method includes: obtaining temperature configuration information and pressure configuration information, and controlling the temperature adjustment module to adjust the temperature in the test cylinder according to the temperature configuration information; and controlling the pressure adjustment module to adjust the pressure in the test cylinder according to the pressure configuration information. In this embodiment, the temperature in the test cylinder is adjusted based on the temperature configuration information, and the pressure in the test cylinder is adjusted based on the pressure configuration information, so that the temperature and pressure in the test cylinder can be accurately controlled according to the instructions of the configuration information. The pressure test pump can automatically provide the temperature and pressure required for each stage of the test cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0040] Figure 1 A schematic diagram of the explosion structure of a pressure test pump in one direction in some embodiments of the present application;

[0041] Figure 2 A schematic diagram of the explosion structure of the pressure test pump in another direction in some embodiments of the present application;

[0042] Figure 3 A schematic flow chart of a control method for a pressure test pump in some embodiments of the present application;

[0043] Figure 4 A schematic flow chart of a control method for a pressure test pump in other embodiments of the present application;

[0044] Figure 5 Schematic diagram of the flow of the control method of the pressure test pump in other embodiments of the present application. DETAILED DESCRIPTION

[0045] The present application is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0046] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0047] It should be noted that, if there is no conflict, the various features in the embodiments of the present application can be combined with each other, all within the scope of protection of the present application. In addition, although the functional module division is performed in the device schematic diagram and the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in a sequence different from the module division in the device or the flow chart. In addition, the words "first", "second", "third", etc. used herein do not limit the data and execution order, but only distinguish the same items or similar items with basically the same functions and effects.

[0048] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0049] In addition, the technical features involved in each embodiment of the present application described below can be combined with each other as long as they do not conflict with each other.

[0050] See also Figure 1 and Figure 2 , Figure 1 and Figure 2 1 is a schematic diagram of a pressure test pump provided in some embodiments of the present application. The pressure test pump 100 includes at least one test cylinder 10, a temperature adjustment module 20, a pressure adjustment module 30 and a controller (not shown).

[0051] The test tube 10 is a sealable container for loading the test product. In some embodiments, the test product may be a sensor used in oil mining, which is used to detect the temperature, pressure or voltage of downhole drilling equipment. It is understandable that the drilling equipment is thousands of meters deep underground, and the sensor needs to withstand a high temperature and high pressure environment, so that the collected data can be uploaded to the surface equipment for analysis. In order to detect the high temperature and high pressure resistance of the test product, a sealable test tube is used to load the test product, and the high temperature and high pressure working environment of the downhole is simulated in the test tube.

[0052] In some embodiments, the test barrel 10 can be cylindrical and vertically arranged in the box of the pressure test pump 100. On the one hand, the cylindrical test barrel 10 can adapt to the shape of the test product, and on the other hand, the test product can be kept in a vertical state to simulate the downhole environment. In some embodiments, the test barrel 10 can be made of carbon manganese steel or stainless steel. It is understandable that the test barrel can withstand high temperature and high pressure and has good sealing performance. Here, no restrictions are imposed on its material and structure.

[0053] In some embodiments, the pressure test pump 100 includes a plurality of test cylinders 10 . Figure 1 An exemplary description is given by taking three test cylinders as an example. In this embodiment, the pressure test pump can perform high temperature and high pressure tests on multiple test products at the same time, which is beneficial to improving the test efficiency.

[0054] The temperature adjustment module 20 is a device that can adjust the temperature, and is used to heat the test barrel, thereby adjusting the temperature inside the test barrel to simulate a high temperature environment. In some embodiments, the temperature adjustment module 20 includes an infrared heating tube (not shown), which is arranged around the test barrel. The infrared heating tube radiates infrared light after being powered on and heated. The infrared light is radiated to the test barrel 10 and converted into heat, so that the temperature of the test barrel 10 and the inside of the barrel will increase to simulate a high temperature environment.

[0055] In some embodiments, the temperature control module 20 includes a first heating section and a second heating section (not shown). The first heating section and the second heating section are two independent infrared heating tubes. The first heating section is arranged near the upper section of the test barrel 10, and is used to heat the upper section of the test barrel 10. The second heating section is arranged near the lower section of the test barrel 10, and is used to heat the lower section of the test barrel 10. Through the first heating section and the second heating section, the test barrel 10 is heated in sections.

[0056] In some embodiments, the temperature control module 20 further includes a solid-state relay (not shown), which is connected to the infrared heating tube and the power supply. The solid-state relay is also connected to the controller, so that the controller controls the power supply of the infrared heating tube by controlling the opening or closing of the solid-state relay. When the infrared heating tube is powered on, it radiates infrared light and can heat the test tube 10. When the infrared heating tube is powered off, the heating stops. In this embodiment, the operation of the infrared heating tube is controlled by controlling the opening or closing of the solid-state relay to control the temperature.

[0057] In some embodiments, a thermocouple (not shown) is also arranged around the test barrel 10. The thermocouple is a temperature sensing element that can detect the temperature of the test barrel 10. In some embodiments, the controller uses a PID algorithm to control the opening or closing of the solid-state relay based on the difference between the real-time temperature detected by the thermocouple and the set temperature, so that the temperature of the test barrel 10 can be maintained near a constant temperature. It can be understood by those skilled in the art that the PID algorithm is an existing control algorithm and will not be described in detail here.

[0058] The pressure regulating module 30 is a device that can adjust the pressure in the test cylinder 10, and is used to adjust the pressure in the test cylinder 10, such as increasing or decreasing the pressure, to simulate a high-pressure environment. In some embodiments, the pressure regulating module 30 includes a hydraulic pump, a pressure gauge, and at least one pressure relief valve (not shown). Among them, the hydraulic pump is a component that provides a pressurized liquid medium, which can convert a low-pressure liquid medium into a high-pressure liquid medium and inject it into the test cylinder 10, so that the pressure in the test cylinder 10 increases, simulating a high-pressure environment. In some embodiments, the liquid medium used can be engine oil.

[0059] The pressure gauge can be disposed on the test cylinder 10 or on a pipe connected thereto, and is used to detect the pressure in the test cylinder 10. In some embodiments, the pressure gauge can be an analog pressure gauge. The pressure gauge and the hydraulic pump are both connected to the controller, so that the controller can control the hydraulic pump to work based on the pressure collected by the pressure gauge to adjust the pressure in the test cylinder.

[0060] The pressure relief valve is an electromagnetic valve, which is arranged on the pressure relief pipe connected to the test cylinder 10. When the pressure relief valve is opened, the pressure in the test cylinder 10 can be released, so that the pressure is reduced. In some embodiments, at least one pressure relief valve includes a slow pressure relief valve and a fast pressure relief valve. Among them, the slow pressure relief valve is an electromagnetic valve with a throttling function, and its pressure relief speed is lower than the pressure relief speed of the fast pressure relief valve.

[0061] In some embodiments, the hydraulic pump is arranged in the box of the pressure test pump. It is understood that the box is divided into a temperature zone and a non-temperature zone, the infrared heating tube and the test tube are installed in the temperature zone, and the hydraulic pump and other electronic control components are installed in the non-temperature zone. It is understood that insulation materials are arranged around the temperature zone to prevent heat from being lost and to prevent other components in the non-temperature zone from being affected.

[0062] The controller can control the overall operation of the pressure test pump 100, for example, control the operation of the temperature adjustment module 20 and the pressure adjustment module 30. In some embodiments, the pressure test pump 100 further includes a touch screen 40, and the operator can input the required temperature parameters and pressure parameters through the touch screen 40. After obtaining the temperature parameters and pressure parameters, the controller controls the temperature adjustment module 20 to work according to the temperature parameters so that the temperature in the test cylinder 10 meets the requirements; and controls the pressure adjustment module 30 to work according to the pressure parameters so that the pressure in the test cylinder 10 meets the requirements, thereby providing a high temperature and high pressure test environment.

[0063] In some embodiments, the pressure test pump 100 further includes an electric arm 50 for taking out a heavier test product from the test cylinder 10. Specifically, after the test cycle is completed, one end of the electric arm 50 is connected to the test product, for example, by a hook connection, and the controller raises the electric arm 50, thereby taking out the test product from the test cylinder 10.

[0064] In some embodiments, the controller includes a memory for storing program instructions corresponding to the control method in any of the following method embodiments, and also includes a timer, etc. Therefore, the control method in any of the following method embodiments is implemented to control the temperature adjustment module and the pressure adjustment module, accurately control the temperature and pressure in the test cylinder, simulate high temperature and high pressure conditions, and automatically provide the temperature and pressure required at each stage of the test cycle.

[0065] The following describes the control methods provided by some embodiments of the present application in conjunction with the exemplary application and implementation of the pressure test pump provided by the embodiments of the present application. Figure 3 , Figure 3 It is a flow chart of the control method provided by some embodiments of the present application. It can be understood that the execution subject of the control method can be one or more controllers of the pressure test pump.

[0066] like Figure 3 As shown, the method S100 may specifically include the following steps:

[0067] S10: Acquire temperature configuration information and pressure configuration information.

[0068] The temperature configuration information includes the temperature set in the test process path. The test process path includes the corresponding relationship between the set temperature and pressure and the time period.

[0069] In some embodiments, the temperature configuration information includes at least one set temperature. The set temperature is a temperature parameter when the temperature control module is working. For example, the set temperature is 160°C, which means that the temperature control module needs to provide a certain heating power so that the temperature it generates reaches 160°C. In some embodiments, the temperature configuration information includes a corresponding relationship between the set temperature and the time period. For example, 0-10h, 120°C, 10h-40h, 160°C, etc.

[0070] The pressure configuration information includes the pressure set in the test process path. In some embodiments, the pressure configuration information includes the corresponding relationship between the pressure and the time period. For example, 0-5h, 20Mpa, 6h-15h, 35Mpa, 15h-39h, 45Mpa.

[0071] It is understandable that the temperature configuration information and the pressure configuration information can be input by the operator through the touch screen of the pressure test pump, so that the controller can obtain the temperature configuration information and the pressure configuration information. The operator can set or edit the corresponding temperature configuration information and the pressure configuration information according to the actual test requirements.

[0072] S20: According to the temperature configuration information, the temperature adjustment module is controlled to adjust the temperature in the test cylinder.

[0073] After the controller obtains the temperature configuration information, it controls the working state of each component in the temperature control module, for example, by controlling the opening or closing of the solid-state relay to control the working state of the infrared heating tube, thereby heating the test cylinder and then adjusting the temperature in the test cylinder.

[0074] In some embodiments, after the controller receives the set temperature in the temperature configuration information, it uses a PID algorithm to control the difference between the real-time temperature and the set temperature based on the real-time temperature collected by the thermocouple, controls the opening or closing of the solid-state relay, and then controls the on and off of the infrared heating tube to achieve precise temperature control and automatic temperature rise.

[0075] In some embodiments, the aforementioned step S20 specifically includes: controlling the hydraulic pump to inject the liquid medium into the test cylinder, and obtaining the real-time pressure collected by the pressure gauge. If the real-time pressure reaches the first pressure value, the temperature adjustment module is controlled to heat the test cylinder according to the temperature configuration information, so that the temperature of the test cylinder reaches the temperature required for the test and is maintained at the temperature required for the test.

[0076] Before heating, first control the hydraulic pump to inject liquid medium into the test cylinder so that the liquid medium wraps the test product to facilitate the conduction of heating heat. It can be understood that as the liquid medium is injected, the pressure in the test cylinder will increase. That is, the amount of liquid medium injected is proportional to the pressure.

[0077] The first pressure value is used to determine whether the injection amount of the liquid medium reaches the required pressure threshold. When the real-time pressure collected by the pressure gauge reaches the first pressure value, it means that the injection amount of the liquid medium reaches the requirement and there is sufficient liquid medium around the test product. Those skilled in the art can set the first pressure value according to actual conditions. In some embodiments, the first pressure value can be 1MP. When the real-time pressure reaches 1MP, it means that the test cylinder is filled with liquid medium.

[0078] After the real-time pressure reaches the first pressure value, the temperature adjustment module is controlled to heat the test cylinder according to the temperature configuration information, so that the heat can be quickly transferred to the test product by the liquid medium, so that the temperature of the test product reaches the required temperature for the test. In some embodiments, based on the heat conduction loss and heat dissipation, the required temperature for the test can be slightly lower than the set temperature in the temperature configuration information. In some embodiments, the required temperature for the test can also be the set temperature in the temperature configuration information. It is understandable that the required temperature for the test can also be input through the touch display screen, so that the controller obtains the required temperature for the test.

[0079] During the entire test cycle, according to the real-time temperature collected by the thermocouple, the PID algorithm is used to control the difference between the real-time temperature and the temperature required for the test, control the opening or closing of the solid-state relay, and then control the on and off of the infrared heating tube to achieve precise temperature control, so that the temperature is constant near the temperature required for the test.

[0080] In this embodiment, a certain amount of liquid medium is first poured into the test cylinder, and then the temperature control module is controlled to heat it, so that the heat can be quickly transferred to the test product in the test cylinder through the liquid medium, thereby improving the heating efficiency. In addition, dry burning can also be effectively prevented, making the pressure test pump safer.

[0081] In some embodiments, the temperature control module includes a first heating section and a second heating section, the first heating section is used to heat the upper section of the test cylinder, and the second heating section is used to heat the lower section of the test cylinder, and the temperature configuration information includes a first set temperature and a second set temperature, and the second set temperature is greater than the first set temperature.

[0082] It can be understood that the test cylinder is vertically arranged in the box body of the pressure test pump, the part close to the top of the box body is the upper section of the test cylinder, and the part close to the bottom of the box body is the lower section of the test cylinder.

[0083] In some embodiments, the first heating section and the second heating section are two independent infrared heating tubes. The first heating section is arranged near the upper section of the test cylinder for heating the upper section of the test cylinder. The second heating section is arranged near the lower section of the test cylinder for heating the lower section of the test cylinder.

[0084] In this embodiment, the temperature configuration information includes a first set temperature and a second set temperature, and the second set temperature is greater than the first set temperature. For example, the first set temperature is 110°C, and the second set temperature is 120°C.

[0085] The aforementioned “according to the temperature configuration information, controlling the temperature control module to heat the liquid medium in the test cylinder so that the temperature of the test cylinder reaches the temperature required for the test” includes: controlling the first heating section to heat at the first set temperature, and controlling the second heating section to heat at the second set temperature, so that the temperature of the test cylinder reaches the temperature required for the test.

[0086] It is understandable that when the test tube is heated, the hot air in the test tube will gather upwards and gather in the upper section of the test tube, so that the upper section of the test tube heats up quickly and the lower section of the test tube heats up relatively slowly. In order to make the test tube heat up evenly and reduce the situation where the temperature control is inaccurate due to the local rapid heating, in this embodiment, the second set temperature corresponding to the lower section of the test tube is set to be greater than the first set temperature corresponding to the upper section of the test tube, that is, the heating power of the second heating section will be greater than the heating power of the first heating section, so as to compensate for the problem of slow heating of the lower section, so that the test tube can be heated evenly and heated evenly, which is conducive to the accuracy of temperature control.

[0087] In some embodiments, a PID algorithm is used to control the first heating section to heat at a first set temperature.

[0088] In this embodiment, the controller uses a PID algorithm to control the difference between the real-time temperature and the temperature required for the test based on the real-time temperature collected by the thermocouple, controls the opening or closing of the solid-state relay, and then controls the on and off of the first heating section to achieve precise temperature control, so that the temperature of the upper section of the test tube is constant near the temperature required for the test.

[0089] In some embodiments, a PID algorithm is used to control the second heating section to heat at a second set temperature.

[0090] In this embodiment, the controller uses a PID algorithm to control the difference between the real-time temperature and the temperature required for the test based on the real-time temperature collected by the thermocouple, controls the opening or closing of the solid-state relay, and then controls the on and off of the second heating section to achieve precise temperature control, so that the temperature of the lower section of the test tube is constant near the temperature required for the test.

[0091] In this embodiment, heating is performed in sections and PID algorithm is used to control the temperature respectively, so that the temperature control is more accurate.

[0092] S30: According to the pressure configuration information, controlling the pressure regulating module to regulate the pressure in the test cylinder.

[0093] After the controller obtains the pressure configuration information, it controls the working state of each component in the pressure regulating module to adjust the pressure in the test cylinder. For example, by controlling the hydraulic pump to work, the test cylinder is pressurized, or by controlling the pressure relief valve to open, the pressure in the test cylinder is released to reduce the pressure. By pressurizing and reducing the pressure, the pressure in the test cylinder can be adjusted according to the pressure configuration information. For example, after starting to adjust the pressure, the pressure is maintained at 0PM for the first 5 hours, then increased to 5MP for 2 hours, then increased to 25MP for 30 hours, and then reduced to 15MP for 11 hours.

[0094] In some embodiments, temperature control and pressure control may be started simultaneously, that is, while the temperature is being raised, the pressure is adjusted according to the pressure configuration information.

[0095] In some embodiments, the aforementioned step S30 specifically includes: after the temperature of the test cylinder reaches the temperature required for the test for the first time, controlling the pressure regulating module to adjust the pressure in the test cylinder according to the pressure configuration information.

[0096] In this embodiment, temperature control is performed first. When the temperature of the test tube reaches the temperature required for the test for the first time, pressure control is performed. During the pressure control process, the temperature is stabilized near the temperature required for the test.

[0097] It is understandable that temperature control is performed first so that the test product can reach the temperature required for the test, which can truly simulate the high temperature environment of the test product entering the well, which is conducive to improving the test accuracy.

[0098] As the temperature of the liquid medium increases, it will expand, resulting in an increase in pressure. Therefore, the pressure regulating module must not only consider the pressure set in the pressure configuration information, but also the pressure increased by the temperature increase, which causes the pressure to fluctuate greatly during the regulation process. Therefore, compared with simultaneous temperature increase and pressure regulation, heating up first and then regulating the pressure based on the pressure configuration information can effectively release the pressure caused by the temperature increase, making the pressure regulation more stable and accurate.

[0099] In some embodiments, the pressure regulating module further includes a slow-release valve, which is used to release the pressure in the test cylinder at a first speed.

[0100] The slow-release valve is an electromagnetic valve, which is installed on the pressure-discharging pipe connected to the test cylinder. When the slow-release valve is opened, the pressure in the test cylinder can be released at a first speed to achieve pressure reduction. The first speed is an empirical value set by technicians in this field according to actual needs, which can achieve fine-tuning of the pressure in the test cylinder without causing a significant pressure drop.

[0101] In this embodiment, the aforementioned "controlling the pressure regulating module to adjust the pressure in the test cylinder according to the pressure configuration information" includes: controlling the opening of the slow-pressure relief valve to reduce the real-time pressure in the test cylinder to a second pressure value; controlling the working state of the hydraulic pump and the opening state of the slow-pressure relief valve to make the real-time pressure in the test cylinder meet the pressure configuration information.

[0102] It is understandable that the pressure in the test cylinder increases due to the injection of the liquid matrix before the temperature is raised, and ideally increases to a preset first pressure value, for example, the first pressure value may be 1 MP. Since the liquid medium expands due to heat during the temperature rise process, the pressure may increase. The actual real-time pressure collected may be slightly higher than 1 MP. The second pressure value is the starting pressure in the pressure configuration information. In some embodiments, the second pressure value is 0 MP.

[0103] The controller first controls the slow-release valve to open to reduce the real-time pressure in the test cylinder to the second pressure value, so that the pressure caused by the heating process can be automatically released to ensure the accuracy of the pressure. After the pressure in the test cylinder stabilizes to near the second pressure value, the pressure regulation begins, that is, the working state of the hydraulic pump and the opening state of the slow-release valve are controlled so that the real-time pressure in the test cylinder meets the pressure configuration information. In some embodiments, the controller compares the real-time pressure collected by the pressure gauge with the corresponding set pressure in the pressure configuration information. If the real-time pressure is lower than the set pressure, the hydraulic pump is controlled to start working to achieve pressure increase. If the real-time pressure is higher than the set pressure, the slow-release valve is controlled to open to achieve pressure reduction. Thus, the real-time pressure is adjusted to near the set pressure and fluctuates within the allowable range.

[0104] In some embodiments, the controller may also use a PID algorithm to adjust the pressure in the test cylinder according to the difference between the real-time pressure and the corresponding set pressure, so that the pressure in the test cylinder meets the pressure configuration information.

[0105] In this embodiment, before the pressure is controlled according to the pressure configuration information, the slow pressure relief valve is controlled to open first to automatically release the pressure caused by the temperature rise process to ensure the accuracy of the pressure.

[0106] In some embodiments, the pressure test pump further comprises an alarm. In some embodiments, the alarm comprises a warning light and a sound player, and can emit light or sound to remind the operator.

[0107] See also Figure 4 , the control method S100 further includes:

[0108] S40: Determine whether pressure leakage occurs according to the real-time pressure.

[0109] It is understandable that when the pressure test pump leaks, the real-time pressure in the test cylinder collected by the pressure gauge will be greatly reduced. Therefore, it is possible to determine whether a pressure leak occurs based on the dynamic change of the real-time pressure.

[0110] In some embodiments, the aforementioned step S40 specifically includes: if the pressure at the current moment is less than or equal to a preset percentage of the pressure at the previous moment, it is determined that a pressure leak occurs.

[0111] For example, if the real-time pressure is collected once every 1 second, the current pressure is compared with the preset percentage of the pressure collected in the previous 1 second. If the current pressure is less than or equal to the preset percentage of the pressure collected in the previous 1 second, it is determined that a pressure leak has occurred.

[0112] The preset percentage is a critical percentage for determining whether a pressure leak occurs. In some embodiments, the preset percentage is 95%. That is, if the pressure at the current moment is less than or equal to 95% of the pressure value of the previous 1S, it indicates that a pressure leak occurs.

[0113] By comparing the current pressure with the preset percentage of the pressure collected at the previous moment, compared with using a fixed critical threshold for judgment, it can effectively avoid misjudgment caused by regulating the pressure, making the judgment of pressure leakage more accurate.

[0114] S50: If it is determined that pressure leakage occurs, the alarm is controlled to sound an alarm and the hydraulic pump is controlled to stop working.

[0115] In certain embodiments, the alarm device comprises a warning light and a sound player. Thus, the alarm can be in the form of light and / or sound to remind the operator.

[0116] In this embodiment, the sealing of the test cylinder and the pipeline can be detected in real time in this way. When it is determined that a pressure leak occurs, the control alarm sounds an alarm and the hydraulic pump is controlled to stop working, which can improve safety and reduce waste.

[0117] In some embodiments, the pressure test pump further includes a rapid pressure relief valve, which is used to release the pressure in the test cylinder at a speed greater than the first speed.

[0118] The quick pressure relief valve is an electromagnetic valve, which is arranged on the pressure relief pipe connected to the test cylinder. When the quick pressure relief valve is opened, the pressure in the test cylinder can be quickly released at a speed greater than the first speed, so as to achieve rapid pressure reduction.

[0119] In this example, see Figure 4 , the control method S100 further includes:

[0120] S60: After the entire test cycle is completed according to the pressure configuration information, the quick pressure relief valve is controlled to open to release the pressure in the test cylinder.

[0121] Based on the pressure configuration information including the correspondence between the pressure value and the time period, it can be understood that when each time period in the pressure configuration information constitutes a test cycle, when the entire test cycle is completed, the test is ended, and the quick pressure relief valve is controlled to open to release the pressure in the test cylinder, thereby reducing the waiting time of the operator.

[0122] In summary, some embodiments of the present application provide a control method for a pressure test pump, wherein the pressure test pump includes a test cylinder, a temperature control module and a pressure regulating module, wherein the test cylinder is used to load a test product. The control method includes: obtaining temperature configuration information and pressure configuration information, and controlling the temperature control module to adjust the temperature in the test cylinder according to the temperature configuration information; and controlling the pressure regulating module to adjust the pressure in the test cylinder according to the pressure configuration information. In this embodiment, the temperature in the test cylinder is controlled based on the temperature configuration information, and the pressure in the test cylinder is controlled based on the pressure configuration information, so that the temperature and pressure in the test cylinder can be accurately controlled according to the instructions of the configuration information. The pressure test pump can automatically provide the temperature and pressure required for each stage of the test cycle.

[0123] Some other embodiments of the present application also provide a control method for a pressure test pump. The following describes the control method for a pressure test pump provided in some other embodiments of the present application in combination with the exemplary application and implementation of the pressure test pump provided in the embodiments of the present application. Figure 5 , Figure 5 It is a flow chart of the control method provided by some other embodiments of the present application. It can be understood that the execution subject of the control method can be one or more controllers in the pressure test pump.

[0124] like Figure 5 The control method S200 specifically includes the following steps:

[0125] S201: Acquire temperature configuration information, pressure configuration information, temperature alarm thresholds, and pressure alarm thresholds.

[0126] In some embodiments, the temperature configuration information includes at least one set temperature, such as 120° C. In some embodiments, the pressure configuration information includes a corresponding relationship between pressure and time period, such as 0-5h, 20Mpa, 6h-15h, 35Mpa, 15h-39h, 45Mpa.

[0127] The temperature alarm threshold is a critical threshold used to determine whether the temperature exceeds the upper limit. When the real-time temperature collected by the thermocouple is greater than the temperature alarm threshold, it means that the temperature is outside the normal range. The pressure alarm threshold is a critical threshold used to determine whether the pressure exceeds the upper limit. When the actual pressure collected by the pressure gauge is greater than or equal to the pressure alarm threshold, it means that the pressure is outside the normal range.

[0128] The operator can input temperature configuration information, pressure configuration information, temperature alarm thresholds, and pressure alarm thresholds through the touch display screen of the pressure test pump.

[0129] S202: After obtaining the start signal, the hydraulic pump is controlled to inject the liquid medium into the test cylinder, and the real-time pressure collected by the pressure gauge is obtained.

[0130] In response to the operator pressing the start button, a start signal is generated. After the controller obtains the start signal, it controls the hydraulic pump to inject liquid medium into the test cylinder so that the liquid medium wraps the test product to facilitate the conduction of heating heat. The real-time pressure collected by the pressure gauge is obtained to detect the injection amount of the liquid medium.

[0131] S203: Determine whether the real-time pressure reaches a first pressure value.

[0132] When the real-time pressure collected by the pressure gauge reaches the first pressure value, it indicates that the injection amount of the liquid medium has reached the requirement and there is sufficient liquid medium around the test product.

[0133] S204: If the temperature is reached, the temperature adjustment module is controlled to heat the test cylinder according to the temperature configuration information, so that the temperature of the test cylinder reaches the temperature required for the test and is maintained at the temperature required for the test.

[0134] After the real-time pressure reaches the first pressure value, the temperature adjustment module is controlled to heat the test cylinder according to the temperature configuration information, so that the heat can be quickly transferred to the test product by the liquid medium, so that the temperature of the test product reaches the required temperature for the test. In some embodiments, a PID algorithm can be used to control the temperature adjustment module so that the temperature in the test cylinder is maintained at the required temperature for the test.

[0135] S205: Determine whether the temperature of the test tube reaches the temperature required for the test.

[0136] Compare the real-time temperature collected by the thermocouple with the temperature required for the test to determine whether the required temperature for the test has been reached.

[0137] S206: If yes, control the slow pressure relief valve to open, so as to reduce the real-time pressure in the test cylinder to a second pressure value.

[0138] When the slow pressure relief valve is opened, the pressure in the test cylinder can be released at a first speed to achieve pressure reduction. The controller first controls the slow pressure relief valve to open to reduce the real-time pressure in the test cylinder to a second pressure value, thereby automatically releasing the pressure caused by the temperature rise process to ensure the accuracy of the pressure.

[0139] S207: Control the working state of the hydraulic pump and the opening state of the slow-release valve so that the real-time pressure in the test cylinder meets the pressure configuration information.

[0140] After the pressure in the test cylinder stabilizes to near the second pressure value, pressure regulation begins, that is, controlling the working state of the hydraulic pump and the opening state of the slow-release valve so that the real-time pressure in the test cylinder meets the pressure configuration information.

[0141] S208: Determine whether pressure leakage occurs according to the real-time pressure. If it is determined that pressure leakage occurs, control the alarm to sound an alarm and control the hydraulic pump to stop working.

[0142] In this way, the sealing of the test cylinder and the pipeline can be detected in real time. When a pressure leak is determined, the control alarm will sound an alarm and the hydraulic pump will be controlled to stop working, which can improve safety and reduce waste.

[0143] S209: If it is monitored that the real-time temperature is greater than or equal to the temperature alarm threshold, and / or the real-time pressure is greater than or equal to the pressure alarm threshold, the alarm is controlled to sound an alarm.

[0144] In this way, the temperature or pressure can be detected in real time. When the temperature or pressure is too high, the alarm is controlled to sound an alarm to remind the staff.

[0145] S210: After the test cycle is completed, the temperature control module is controlled to stop heating, the hydraulic pump is controlled to stop working, and the quick pressure relief valve is controlled to open to release the pressure in the test cylinder.

[0146] In this embodiment, through the above method, on the one hand, the pressure test pump can automatically provide the temperature and pressure required for each stage of the test cycle, simulate high temperature and high pressure conditions, and perform automated testing. On the other hand, the temperature is first increased, and then the slow pressure relief valve is controlled to open to automatically release the pressure caused by the temperature increase process, and then the pressure is adjusted based on the pressure configuration information. Compared with the simultaneous temperature increase and pressure adjustment, the pressure caused by the temperature increase can be effectively released, making the pressure regulation more stable and accurate. In addition, the sealing of the test tube and the pipeline can be effectively detected, which improves the safety performance.

[0147] It should be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0148] Through the description of the above implementation methods, ordinary technicians in this field can clearly understand that each implementation method can be implemented by means of software plus a general hardware platform, and of course, it can also be implemented by hardware. Ordinary technicians in this field can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A control method for a pressure test pump, characterized in that: The pressure test pump comprises a test cylinder, a temperature adjustment module and a pressure adjustment module, wherein the test cylinder is placed vertically and is used to load the test product, and the temperature adjustment module comprises a first heating section and a second heating section, wherein the first heating section is used to heat the upper section of the test cylinder, and the second heating section is used to heat the lower section of the test cylinder; The pressure regulating module includes a hydraulic pump and a pressure gauge, and the pressure gauge is used to detect the pressure in the test cylinder; The control method comprises: Acquire temperature configuration information and pressure configuration information, wherein the temperature configuration information includes a first set temperature and a second set temperature, wherein the second set temperature is greater than the first set temperature; Controlling the hydraulic pump to inject liquid medium into the test cylinder, and obtaining the real-time pressure collected by the pressure gauge; If the real-time pressure reaches a first pressure value, the steps of controlling the first heating section to heat at the first set temperature and controlling the second heating section to heat at the second set temperature are executed according to the temperature configuration information, so that the temperature of the test cylinder reaches the temperature required for the test and is maintained at the temperature required for the test; After the temperature of the test cylinder reaches the temperature required for the test for the first time, the pressure regulating module is controlled to regulate the pressure in the test cylinder according to the pressure configuration information.

2. The control method according to claim 1, characterized in that: The step of controlling the first heating section to heat at the first set temperature and controlling the second heating section to heat at the second set temperature comprises: Using a PID algorithm to control the first heating section to heat according to the first set temperature; and / or, The PID algorithm is used to control the second heating section to heat according to the second set temperature.

3. The method according to claim 1, characterized in that The pressure regulating module further comprises a slow pressure relief valve, and the slow pressure relief valve is used to release the pressure in the test cylinder at a first speed; The step of controlling the pressure regulating module to regulate the pressure in the test cylinder according to the pressure configuration information includes: Controlling the slow pressure relief valve to open, so as to reduce the real-time pressure in the test cylinder to a second pressure value; The working state of the hydraulic pump and the opening state of the slow-release valve are controlled so that the real-time pressure in the test cylinder satisfies the pressure configuration information.

4. The method according to claim 1, characterized in that: The pressure test pump also includes an alarm, and the control method also includes: Determining whether a pressure leak occurs according to the real-time pressure; If it is determined that pressure leakage occurs, the alarm is controlled to sound an alarm and the hydraulic pump is controlled to stop working.

5. The method according to claim 4, characterized in that Determining whether a pressure leak occurs according to the real-time pressure includes: If the pressure at the current moment is less than or equal to a preset percentage of the pressure at the previous moment, it is determined that a pressure leak has occurred.

6. The method according to claim 1, characterized in that The pressure test pump further includes a quick pressure relief valve, and the quick pressure relief valve is used to release the pressure in the test cylinder at a speed greater than the first speed; the control method further includes: After the entire test cycle is completed according to the pressure configuration information, the quick pressure relief valve is controlled to open to release the pressure in the test cylinder.

7. A pressure test pump, characterized in that: include: A test cylinder, used to load the test product; A temperature adjustment module, the temperature adjustment module comprising a first heating section and a second heating section, the first heating section is used to heat the upper section of the test cylinder, and the second heating section is used to heat the lower section of the test cylinder; A pressure regulating module, the pressure regulating module comprising a hydraulic pump and a pressure gauge, the hydraulic pump is used to regulate the pressure in the test cylinder, and the pressure gauge is used to detect the pressure in the test cylinder; A controller, wherein the controller is electrically connected to the temperature regulating module and the voltage regulating module, and is used to execute the control method according to any one of claims 1 to 6.

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