阅读说明：本技术 一种低温地热套管的检测装置 (Detection apparatus for low temperature ground heat sleeve pipe ) 是由 张毅 安晨 郭政 张鹏 穆朗枫 张丰琰 汪伟 王思琪 袁璐璐 李立鑫 王洛娟 于 2020-06-09 设计创作，主要内容包括：本发明涉及一种低温地热套管的检测装置。该装置包括：水箱、加热机构、循环泵、PID控制器、测试管段、第一温度传感器、第二温度传感器和第三温度传感器组；加热机构固定于水箱内部,水箱的出口通过第一传输管路接至循环泵的入口,循环泵的出口通过第二传输管路接至测试管段的入口,测试管段的出口通过第三传输管路接至水箱的入口；第一温度传感器固定于测试管段的入口位置,输出端与PID控制器的设定端的接口连接；第二温度传感器固定于水箱内部,输出端与PID控制器的监测端的接口连接；PID控制器的输出端与加热机构的控制端连接；第三温度传感器组的多个第三温度传感器等间距的固定于测试管段的内部。本发明可以降低低温地热套管的测试难度。(The invention relates to a detection device of a low-temperature geothermal bushing. The device includes: the device comprises a water tank, a heating mechanism, a circulating pump, a PID controller, a test pipe section, a first temperature sensor, a second temperature sensor and a third temperature sensor group; the heating mechanism is fixed in the water tank, an outlet of the water tank is connected to an inlet of the circulating pump through a first transmission pipeline, an outlet of the circulating pump is connected to an inlet of the test pipe section through a second transmission pipeline, and an outlet of the test pipe section is connected to an inlet of the water tank through a third transmission pipeline; the first temperature sensor is fixed at the inlet position of the test pipe section, and the output end of the first temperature sensor is connected with an interface of the setting end of the PID controller; the second temperature sensor is fixed in the water tank, and the output end of the second temperature sensor is connected with an interface of the monitoring end of the PID controller; the output end of the PID controller is connected with the control end of the heating mechanism; and a plurality of third temperature sensors of the third temperature sensor group are fixed in the test pipe section at equal intervals. The invention can reduce the test difficulty of the low-temperature geothermal casing.)

1. A device for inspecting a cryogenic geothermic casing, comprising: the device comprises a water tank, a heating mechanism, a circulating pump, a PID controller, a test pipe section, a first temperature sensor, a second temperature sensor and a third temperature sensor group;

the heating mechanism is fixed in the water tank, an outlet of the water tank is connected to an inlet of the circulating pump through a first conveying pipeline, an outlet of the circulating pump is connected to an inlet of the test pipe section through a second conveying pipeline, and an outlet of the test pipe section is connected to an inlet of the water tank through a third conveying pipeline;

the first temperature sensor is fixed at the inlet position of the test pipe section, and the output end of the first temperature sensor is connected with an interface of the setting end of the PID controller; the second temperature sensor is fixed in the water tank, and the output end of the second temperature sensor is connected with an interface of the monitoring end of the PID controller; the output end of the PID controller is connected with the control end of the heating mechanism; the third temperature sensor group comprises a plurality of third temperature sensors, and the third temperature sensors are fixed in the test pipe section at equal intervals.

2. The apparatus for inspecting a cryogenic geothermal casing according to claim 1, wherein the test pipe section is a casing structure including an inner pipe, a thermal insulation material and an outer pipe, the thermal insulation material being filled between the inner pipe and the outer pipe; the third temperature sensors are fixed on the inner pipe of the test pipe section.

3. The apparatus of claim 2, wherein the third sensor is a patch sensor.

4. The apparatus for detecting a cryogenic geothermic casing according to claim 1, wherein said first transfer line, said second transfer line and said third transfer line are each a casing structure comprising an inner pipe, a thermal insulation material and an outer pipe, said thermal insulation material being filled between said inner pipe and said outer pipe.

5. The apparatus for detecting a low-temperature geothermal casing according to claim 1, wherein the heating mechanism is an electric heater, and the output end of the PID controller is connected with a power regulator of the electric heater.

6. The apparatus for inspecting a cryogenic geothermic casing according to claim 1, further comprising: the first pressure gauge, the second pressure gauge and the flowmeter are arranged;

the first pressure gauge is fixed on a first transmission pipeline at the inlet of the circulating pump, the second pressure gauge is fixed on a second transmission pipeline at the outlet of the circulating pump, and the flowmeter is fixed on the second transmission pipeline between the second pressure gauge and the inlet of the test pipe section.

7. The apparatus for inspecting a cryogenic geothermic casing according to claim 6, further comprising: and the input port of the single chip microcomputer is connected with the output ports of all the third temperature sensors in the third temperature sensor group, and the single chip microcomputer is used for analyzing the heat preservation effect of the test pipe section according to the measurement data of all the third temperature sensors.

8. The device for detecting the low-temperature geothermal casing according to claim 7, wherein the input port of the single chip microcomputer is further connected with the output port of the flowmeter, and the single chip microcomputer is further used for analyzing flow rate data in a test pipe section according to detection data of the flowmeter.

9. The apparatus for inspecting a cryogenic geothermic casing according to claim 1, further comprising: and the display device is used for displaying the measurement data of the first temperature sensor, the second temperature sensor and the third temperature sensor group.

Technical Field

The invention relates to the field of heat preservation development of geothermal casings, in particular to a detection device of a low-temperature geothermal casing.

Background

In the process of oil field development, compared with the processes of three-pipe heat tracing, water mixing, oil collecting and the like, the process flow of normal-temperature oil collecting is simple, the energy consumption is low, and the process flow is the optimal choice in the process of oil field development. If the heat energy of the stratum can be effectively utilized, the heat energy loss of crude oil in the shaft lifting process is reduced, the temperature of the output liquid of a well head can be improved, and the method has very important significance for improving the flow state of the output liquid in the shaft, reducing the length of a wax precipitation section, changing the maintenance mode of an oil well and adopting a ground normal-temperature oil collecting process.

In order to effectively utilize geothermal resources of an oil field and realize normal-temperature gathering and transportation on the ground of the oil field, the existing technical research direction relates to development of a heat-insulation oil pipe, but the field test of the heat-insulation oil pipe on a platform is usually difficult and is not beneficial to debugging.

Disclosure of Invention

The invention aims to provide a detection device of a low-temperature geothermal sleeve to reduce the test difficulty of the low-temperature geothermal sleeve.

In order to achieve the purpose, the invention provides the following scheme:

a device for inspecting a cryogenic geothermic casing comprising: the device comprises a water tank, a heating mechanism, a circulating pump, a PID controller, a test pipe section, a first temperature sensor, a second temperature sensor and a third temperature sensor group;

the heating mechanism is fixed in the water tank, an outlet of the water tank is connected to an inlet of the circulating pump through a first conveying pipeline, an outlet of the circulating pump is connected to an inlet of the test pipe section through a second conveying pipeline, and an outlet of the test pipe section is connected to an inlet of the water tank through a third conveying pipeline;

the first temperature sensor is fixed at the inlet position of the test pipe section, and the output end of the first temperature sensor is connected with an interface of the setting end of the PID controller; the second temperature sensor is fixed in the water tank, and the output end of the second temperature sensor is connected with an interface of the monitoring end of the PID controller; the output end of the PID controller is connected with the control end of the heating mechanism; the third temperature sensor group comprises a plurality of third temperature sensors, and the third temperature sensors are fixed in the test pipe section at equal intervals.

Optionally, the test pipe section is of a casing structure including an inner pipe, a thermal insulation material and an outer pipe, and the thermal insulation material is filled between the inner pipe and the outer pipe; the third temperature sensors are fixed on the inner pipe of the test pipe section.

Optionally, the third sensor is a patch sensor.

Optionally, the first transmission pipeline, the second transmission pipeline and the third transmission pipeline are all of a sleeve structure including an inner pipe, a heat insulation material and an outer pipe, and the heat insulation material is filled between the inner pipe and the outer pipe.

Optionally, the heating mechanism is an electric heater, and an output end of the PID controller is connected to a power regulator of the electric heater.

Optionally, the method further includes: the first pressure gauge, the second pressure gauge and the flowmeter are arranged;

the first pressure gauge is fixed on a first transmission pipeline at the inlet of the circulating pump, the second pressure gauge is fixed on a second transmission pipeline at the outlet of the circulating pump, and the flowmeter is fixed on the second transmission pipeline between the second pressure gauge and the inlet of the test pipe section.

Optionally, the method further includes: and the input port of the single chip microcomputer is connected with the output ports of all the third temperature sensors in the third temperature sensor group, and the single chip microcomputer is used for analyzing the heat preservation effect of the test pipe section according to the measurement data of all the third temperature sensors.

Optionally, the input port of the single chip microcomputer is further connected with the output port of the flowmeter, and the single chip microcomputer is further configured to analyze flow speed data in the test pipe section according to the detection data of the flowmeter.

Optionally, the method further includes: and the display device is used for displaying the measurement data of the first temperature sensor, the second temperature sensor and the third temperature sensor group.

According to the specific embodiment provided by the invention, the invention discloses the following technical effects:

the temperature inside the water tank is used as a monitoring value, the temperature at the inlet position of the test pipe section is used as a set value, the PID controller is used for controlling the heating parameters of the heating mechanism inside the water tank in real time, and further controlling the temperature of the liquid entering the test pipe section to be constant, so that the heat preservation effect of the test pipe section can be analyzed according to the measurement data of the third temperature sensor inside the test pipe section. Compared with the prior art, the invention reduces the test difficulty of the low-temperature geothermal sleeve, enables the device in the development process of the heating technology for the low-temperature geothermal sleeve to be simpler and more convenient, and is closer to the reality, thereby providing a more scientific and accurate development rule with wide applicability for the development of the low-temperature geothermal sleeve.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a detection device of a low-temperature geothermal bushing of the invention.

Number designation in the figures: the method comprises the following steps of 1-a water tank, 2-a heating mechanism, 3a, 3b, 3c and 3 d-valves, 4-a circulating pump, 5-a testing pipeline, 6 a-a first temperature sensor, 6 b-a second temperature sensor, 7 a-a first pressure gauge, 7 b-a second pressure gauge and 8-a flow meter.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Fig. 1 is a schematic structural diagram of a detection device of a low-temperature geothermal bushing of the invention. As shown in fig. 1, the inspection apparatus for a low-temperature geothermal bushing of the present invention includes a heating portion, a piping portion, and a control portion.

The heating section includes: a water tank 1 and a heating mechanism 2. The water tank 1 includes a water injection port, an outlet, an inlet, and the like. The heating mechanism 2 is fixed at the bottom inside the water tank 1, and the heating mechanism 2 is one or more of an electric heating wire, an electric heating pipe and an electric heating plate, and is used for heating the liquid in the water tank 1 and keeping the temperature constant.

The pipe section includes: valves 3a, 3b, 3c and 3d, circulation pump 4, transfer lines and temperature sensors. Specifically, the outlet of the water tank 1 is connected to the inlet of the circulation pump 4 through a first transmission pipeline, and the outlet of the circulation pump 4 is connected to the inlet of the test pipe section 5 through a second transmission pipeline. And two ends of the circulating pump 4 are flange interfaces, are respectively matched with the flanges of the first transmission pipeline and the second transmission pipeline, and are fastened and connected through bolts. The outlet of the test tube section 5 is connected to the inlet of the water tank 1 via a third transfer line. And two ends of the test pipeline 5 are flange interfaces, and the two ends of the test pipeline are respectively matched with flanges of the second transmission pipeline and the third transmission pipeline and are fastened and connected through bolts. Valves 3a, 3b, 3c and 3d are respectively installed on an inlet pipe of the circulation pump 4, an outlet pipe of the circulation pump 4, an inlet pipe of the test pipe 5 and an outlet pipe of the test pipe 5.

The test pipe section 5 and the transmission pipelines (the first transmission pipeline, the second transmission pipeline and the third transmission pipeline) are of a sleeve structure comprising an inner pipe, a heat insulation material and an outer pipe, and the heat insulation material is filled between the inner pipe and the outer pipe to realize heat insulation of the pipelines.

The temperature sensor comprises a first temperature sensor 6a, a second temperature sensor 6b and a third temperature sensor group, the first temperature sensor 6a is fixed at the inlet position of the test pipe section 5, the second temperature sensor 6b is fixed in the water tank 1, the third temperature sensor group comprises a plurality of third temperature sensors, and the third temperature sensors are fixed on the inner pipe of the test pipe section 5 at equal intervals. In a particular embodiment, the third temperature sensor may be a patch temperature sensor.

The control part mainly comprises a PID controller. The output end of the first temperature sensor 6a is connected with an interface of a setting end of the PID controller, the output end of the second temperature sensor 6b is connected with an interface of a monitoring end of the PID controller, and the output end of the PID controller is connected with a control end of the heating mechanism 2. The PID controller can be installed on an inlet pipe section of the pipe section 5 and can automatically adjust PID parameters according to the running external environment, and then the heating parameters of the heating mechanism 2 are adjusted according to the measured value of the first temperature sensor 6a at the setting end and the measured value of the second temperature sensor 6b at the monitoring end. Specifically, in a specific embodiment, the present invention further includes a power regulator, an input end of the power regulator receives an output instruction of the PID, and an output end of the power regulator is connected to the control end of the heating mechanism 2, so that the PID controller adjusts the heating parameters of the heating mechanism 2 by adjusting parameters of the power regulator. Meanwhile, the power regulator can also perform adaptive improvement on the output power of the heating mechanism 2 according to the actual power distribution situation on site, the maximum output upper limit value reaches 80%, and the open circuit of a laboratory caused by overcurrent is avoided.

As a specific embodiment, the detection apparatus of a low-temperature geothermal bushing of the present invention further includes: a first pressure gauge 7a, a second pressure gauge 7b and a flow meter 8. The first pressure gauge 7a is fixed on a first transmission pipeline at the inlet of the circulating pump 4 and used for detecting the pressure value at the inlet of the circulating pump 4 in real time. And the second pressure gauge 7b is fixed on a second transmission pipeline at the outlet of the circulating pump 4 and is used for detecting the pressure at the outlet of the circulating pump 4 in real time. The flowmeter 8 is fixed on a second transmission pipeline between the second pressure gauge 7b and the inlet of the test pipe section 5 and is used for detecting the inlet flow of the test pipe section 5 in real time.

In addition to the above embodiments, as another embodiment, the detection apparatus for a low-temperature geothermal bushing according to the present invention further includes: and the input port of the single chip microcomputer is connected with the output ports of all the third temperature sensors in the third temperature sensor group, and the single chip microcomputer is used for analyzing the heat preservation effect of the test pipe section 5 according to the measurement data of all the third temperature sensors. The input port of the singlechip is also connected with the output port of the flowmeter 8 and used for analyzing the flow velocity data in the test pipe section according to the detection data of the flowmeter 8.

In addition to the above embodiments, as another embodiment, the detection apparatus for a low-temperature geothermal bushing according to the present invention further includes: and the data output ends of the first temperature sensor 6a, the second temperature sensor 6b and the third temperature sensor group are connected with the input end of the display device, and the display device is used for displaying the measurement data of the first temperature sensor, the second temperature sensor and the third temperature sensor group. The output end of the single chip microcomputer is also connected with the input end of the display device, and the display device can also display the heat preservation effect of the test pipe section 5 and the flow speed data in the test pipe section obtained by the single chip microcomputer in real time.

According to the detection device of the low-temperature geothermal sleeve, detection parameters of the temperature sensors are different, the temperature of the inlet of the water tank 1 is lower than the temperature of the inlet water of the test pipe section 5 due to the heat dissipation effect of the test pipe section 5, and the temperature difference between the two temperatures is kept relatively stable. Meanwhile, the heat generated in the operation process of the circulating pump 4 can also heat the water in the whole pipeline, so that the water temperature at the inlet of the water tank is slightly higher than the water temperature in the water tank, and therefore, the detection device of the low-temperature geothermal sleeve provided by the invention meets the following requirements: and the inlet temperature of the pipe section is greater than the inlet temperature of the water tank and is greater than the temperature in the water tank. Therefore, the temperature of the inlet of the test pipe section is used as a set value of the PID controller, the temperature in the water tank is used as a monitoring value of the PID controller, the control output of the PID is adjusted in real time, and the temperature of the liquid at the inlet of the test pipe section is kept constant.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.