Oil well oil conveying device suitable for consistency crude oil conveying and conveying process

Abstract

The oil well oil conveying device comprises a screw pump arranged at a well mouth, an output tee joint is arranged at the output end of the screw pump, one end of the output tee joint is connected with the output end of the screw pump, one end of the output tee joint is connected with a check valve, and the other end of the output tee joint is connected with a backflow pipeline. Pressure detection assemblies are arranged on the output end of the screw pump and the backflow pipeline, an output mixing assembly is arranged at the output end of the check valve, a conveying pipeline is arranged at the output end of the output mixing assembly, and an electric heating belt is laid on the periphery of the conveying pipeline. A ribbon heater promotes a conveying pipeline to maintain a certain temperature, meanwhile, a material mixing assembly is arranged, a flow improver can be conveniently added in the conveying process, the fluidity of thick oil is improved, when the pipeline is blocked, a pressure detection assembly feeds back, the pumped thick oil is guided into a well again by opening a backflow pipeline, pump suffocation of the screw pump is avoided, and the damage risk of the device is reduced. And the method has remarkable technical effects and application values.

Description

Technical Field

[0001] The invention relates to the technical field of crude oil transportation. Background Art

[0002] When high-wax crude oil flows in the pipeline, as the temperature decreases, wax will gradually precipitate and adhere to the inner wall of the pipeline, forming a wax layer, which causes the inner diameter of the pipeline to decrease. When the crude oil temperature further drops below the freezing point, the crude oil will solidify into a solid and completely block the pipeline. This blockage not only affects the normal transportation of crude oil, but may also cause pipeline damage and production interruption, causing serious economic losses to oil production and transportation. The problem of blockage in the pipeline for crude oil transportation with high viscosity is mainly due to the precipitation of wax and solidification of crude oil caused by the decrease in temperature during the transportation process.

[0003] Therefore, heating transportation technology is used to set up heating stations along the pipeline to maintain the temperature of crude oil during transportation to prevent wax precipitation and crude oil solidification. Secondly, flow improvers such as pour point depressants and wax inhibitors are used. These chemical additives can change the morphology and structure of wax crystals, reduce the pour point and viscosity of crude oil, and thus improve its fluidity and transportation efficiency. In addition, mechanical dredging methods can also be used, such as using equipment such as pipe cleaners or drills to physically dredge blocked pipelines. These methods can be used alone or in combination.

[0004] However, these solutions are only suitable for short-distance transportation. When crude oil is produced from an oil well, it needs to be transported to a joint station several kilometers away for processing. Due to the dry and cold winter climate and the long winter, the long-distance transportation causes the crude oil heated by the heating station to cool down quickly in the pipeline. The addition of flow improvers is not ideal, and the mechanical dredging method is time-consuming and labor-intensive. In order to solve the problem of crude oil transportation, the existing solution is to use tankers to collect and transport in turns. This method consumes labor, and the economic and production costs are too high. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an oil well oil transportation device and transportation process suitable for transportation of crude oil with high viscosity.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: An oil well oil delivery device suitable for delivering high-viscosity crude oil comprises a screw pump arranged at a wellhead, an output tee is arranged at the output end of the screw pump, one end of the output tee is connected to the output end of the screw pump, one end is connected to a check valve, and the other end is connected to a return line, the return line passes into the screw pump pipeline and communicates with the wellhead, a pressure detection component is arranged on the output end of the screw pump and on the return line, an output mixing component is arranged at the output end of the check valve, a delivery pipeline is arranged at the output end of the output mixing component, the delivery pipeline is connected to an exchange station, and an electric heating belt is laid on the periphery of the delivery pipeline. Through the above scheme, when the temperature is too low or the pipeline transportation pressure is too high, the pressure detection component is set to monitor according to the pipeline transportation pressure, and the electric heating belt is turned on to make the transportation pipeline maintain a certain temperature to avoid the precipitation of heavy oil wax due to low temperature. At the same time, the mixing component is set to facilitate the addition of flow improver during the transportation process to improve the fluidity of the heavy oil. At the same time, when the pipeline is blocked, the pressure detection component feedback is opened to open the reflux pipeline to reintroduce the extracted heavy oil into the well to avoid the screw pump from being blocked and reduce the risk of equipment damage. It has high economic value to cope with the long and cold winter climate. Through remote control and maintenance, it greatly reduces the workload of staff and improves work efficiency.

[0007] Furthermore, the output mixing component includes a mixing bag arranged at the output end of the check valve, the mixing bag is provided with a mixing gate valve and a mixing joint in sequence, the output end of the mixing bag is connected to an inlet and outlet gate valve, the inlet and outlet gate valve is connected to an outlet tee, one end of the outlet tee is connected to the inlet and outlet gate valve, one end is connected to the delivery pipeline, and the other end is provided with an electric valve and a sweeping line external joint. Through the above scheme, an electric valve and a sweep line external joint are provided to facilitate the introduction of steam or washing liquid to clean the pipeline. A mixing bag is provided. When the pressure of the conveying pipeline is too high, a flow improver is added through a mixing gate valve and a mixing joint. The flow improver is combined with the heavy oil conveyed from the output end of the single flow valve to form a mixed conveying to improve the fluidity of the heavy oil.

[0008] Furthermore, the return pipeline includes a return pipe tee short section arranged at one end of the output tee, the other end of the return pipe tee short section is provided with a safety valve elbow, the third end is provided with a return pipe short section, the safety valve elbow is provided with a spring-type safety valve, the return pipe short section is also provided with an electric valve, the end of the return pipe short section is provided with a filter, the filter is also provided with inlet and outlet gate valves, the end of the inlet and outlet gate valves is provided with a liquid inlet short section, the output end of the filter is provided with a short circuit, the short circuit is connected to the screw pump pipeline and connected with the wellhead. Through the above scheme, when the pressure of the transmission pipeline is detected to be too high and blockage occurs, the heavy oil can be introduced into the three-way short section of the return pipe through the output three-way valve in conjunction with the check valve, and the electric valve on the short section of the return pipe is started at the same time, and the heavy oil is introduced into the wellhead of the oil well through the short section of the return pipe three-way short section, the return pipe short section, the filter, and the short circuit in sequence. At the same time, the filter preliminarily filters the heavy oil to reduce impurities. At the same time, inlet and outlet gate valves are set to cooperate with the liquid inlet short section, and various reagents are introduced into the filter and finally into the wellhead, so as to facilitate the addition of various reagents such as flow improvers and improve the fluidity of the heavy oil.

[0009] Furthermore, an electric belt is also laid on the periphery of the short circuit, and the heating temperature of the electric belt does not exceed 40°C. A temperature sensor and a reflux pressure transmitter are distributed on the short circuit. Through the above scheme, temperature sensors and reflux pressure transmitters are distributed on the short-circuit, which is convenient for detecting the temperature of the electric belt and the pressure of the reflux heavy oil in the short-circuit, and for judging the viscosity of the heavy oil according to the pressure. The subsequent reagent addition and electric heating work are convenient according to the data. The sensor detection is high in accuracy and saves labor.

[0010] Furthermore, an output pressure transmitter is provided on the pipe wall of one end of the outlet tee connected to the inlet and outlet gate valves. Through the above scheme, an output pressure transmitter is set on the wall of the outlet tee pipe, which is convenient for monitoring the pressure of the heavy oil at the outlet and the pressure before the heavy oil enters the transmission pipeline, so as to preliminarily judge the fluidity of the heavy oil and monitor the operation status.

[0011] Furthermore, a vibration sensor and a temperature transmitter are provided at the output end of the screw pump. Through the above scheme, a vibration sensor and a temperature transmitter are provided at the output end of the screw pump. On the one hand, the vibration sensor can detect the operating status of the screw pump and monitor the vibration of the screw pump in real time during operation, including parameters such as vibration frequency and amplitude. By analyzing these vibration data, the operating status of the pump can be accurately grasped to determine whether it is within the normal working range. When the speed and load of the pump change, its vibration characteristics will also change accordingly. The sensor can capture these changes in time, so as to preliminarily determine whether blockage and pipeline overpressure occur. At the same time, a temperature transmitter is set to monitor the wellhead temperature of the heavy oil and then determine the status of the heavy oil.

[0012] The second object of the present invention is to provide an oil well oil transportation process for transporting crude oil with high viscosity using the above-mentioned oil transportation device, comprising the following steps: Step S1: cleaning the scanning line; Step S2: starting the screw pump to initially extract the heavy oil and detecting the outlet temperature and operating status; Step S3: Turn on the electric heating belt of the transmission pipeline at a low temperature according to the local temperature; Step S4: The output pressure transmitter monitors the heavy oil delivery pressure, and when overpressure occurs, the heavy oil circulation is started to introduce the heavy oil into the oil well. When the pressure is too high, the spring-loaded safety valve is triggered, and the contents of the pipeline are discharged from the spring-loaded safety valve; Step S5: when overpressure occurs, impurities are discharged and flow improver is introduced through the liquid inlet nipple; Step S6: In extremely low temperature conditions, flow improver is input through the mixing bag and mixing output is started. Through the above scheme, impurities in the conveying pipeline are cleaned by cleaning and sweeping operations. Subsequently, the screw pump is started to initially extract the heavy oil, and the outlet temperature and operating status are detected in real time to ensure the normal operation of the pump. According to the local temperature, the electric heating belt of the conveying pipeline is turned on in time to prevent the crude oil from blocking the pipe due to low temperature. The output pressure transmitter is used to continuously monitor the conveying pressure. Once an overpressure occurs, the heavy oil circulation is immediately started to guide the heavy oil back to the oil well, and the material in the pipeline is discharged through the spring-loaded safety valve when the pressure is too high to ensure safety. In the case of overpressure, impurities can be discharged or flow improvers can be introduced through the liquid inlet nipple to optimize the conveying conditions. In the face of extreme low temperatures, the flow improver is input with the help of the mixing bag and the mixed output is turned on to further improve the conveying efficiency. This process effectively prevents pipeline blockage, reduces energy consumption and maintenance costs, and significantly improves the conveying efficiency and safety through real-time monitoring and intelligent regulation. It is especially suitable for heavy oil transportation in low temperature environments, and realizes efficient and stable transportation of heavy oil. This process effectively prevents pipeline blockage, reduces energy consumption and maintenance costs during transportation, and improves transportation efficiency and safety. It is particularly suitable for heavy oil transportation in low-temperature environments and has significant technical effects and application value.

[0013] Furthermore, in step S2, a vibration sensor is used to detect the operating status of the screw pump, abnormal vibration is detected in advance, and a remote early warning signal is issued. A temperature transmitter is used to monitor the temperature of the heavy oil out of the well, and the status of the heavy oil is determined. Combined with the temperature of the day, remote monitoring and operation are performed.

[0014] Through the above scheme, step S2 uses the vibration sensor to capture abnormal vibration of the screw pump in real time, and gives early warning to prevent failures; at the same time, the temperature transmitter accurately senses the temperature of the heavy oil out of the well, and combines the air temperature data to achieve remote intelligent monitoring and operation. It greatly improves the reliability and safety of oil well transportation, optimizes operation management, reduces maintenance costs, enhances the adaptability and flexibility of heavy oil transportation, and provides a strong guarantee for efficient and stable oil well production.

[0015] Furthermore, in step S4, the outlet tee delivery pressure is collected through the output pressure transmitter. When the pressure is greater than 2.5 MPa, the check valve is closed, the output tee is started, and the heavy oil at the output end of the screw pump is passed through the electric valve along the tee short section of the return pipe and the short section of the return pipe into the filter for preliminary purification of the heavy oil, and then the heavy oil is introduced into the oil well after being heated by the electric belt through the short circuit.

[0016] Through the above scheme, the output pressure transmitter is used to accurately collect the delivery pressure data of the outlet tee. When the pressure is detected to exceed 2.5MPa, the system automatically closes the check valve and starts the output tee. Through the precise control of the electric valve, the heavy oil at the output end of the screw pump is guided to the return pipe tee short section and the return pipe short section, and enters the filter for preliminary purification. The purified heavy oil is then heated by the electric belt to ensure its fluidity and finally safely introduced into the oil well. It not only effectively prevents overpressure from damaging pipelines and equipment, but also improves the delivery quality and efficiency of heavy oil through precise control and pretreatment, and enhances the stability and reliability of the entire oil transportation system.

[0017] Furthermore, in step S5, when the pressure is between 0.3-2.5 MPa, impurities are discharged and flow improvers are introduced through the inlet and outlet gate valve ends in cooperation with the liquid inlet nipple, and at the same time, flow improvers are introduced through the mixing joint in cooperation with the mixing gate valve for mixed output; when the pressure is <0.3 MPa, the electric heating belt is turned off and the introduction of the flow improver is stopped.

[0018] Through the above scheme, when the conveying pressure is in the normal range of 0.3-2.5MPa, the impurities in the pipeline can be effectively discharged through the coordinated cooperation of the inlet and outlet gate valve ends and the liquid inlet short section, while the flow improver is introduced to improve the fluidity of the heavy oil. In addition, the coordinated use of the mixing joint and the gate valve can fully mix the flow improver and the heavy oil, thereby improving the conveying efficiency and the fluidity of the heavy oil. When the pressure is lower than 0.3MPa, the system automatically turns off the electric heating belt and stops introducing the flow improver, avoiding energy waste and reflecting the intelligent energy-saving and protection mechanism. It enhances the adaptability and flexibility of the oil transportation process, improves the convenience and safety of operation, optimizes energy utilization, reduces operating costs, and provides strong technical support for the efficient transportation of heavy oil.

[0019] The beneficial effects of the present invention are as follows: 1. The present invention has a great improvement on the existing heavy oil transportation. By performing cleaning and sweeping operations, impurities in the transportation pipeline are cleaned. Subsequently, the screw pump is started to initially extract the heavy oil, and the outlet temperature and operating status are detected in real time to ensure the normal operation of the pump. According to the local temperature, the electric heating belt of the transportation pipeline is turned on in time to prevent the crude oil from blocking the pipe due to low temperature. The output pressure transmitter is used to continuously monitor the delivery pressure. Once an overpressure situation occurs, the heavy oil circulation is immediately started to guide the heavy oil back to the oil well, and the materials in the pipeline are discharged through the spring-type safety valve when the pressure is too high to ensure safety. In the case of overpressure, impurities can be discharged or flow improvers can be introduced through the liquid inlet short section to optimize the transportation conditions. In the face of extreme low temperatures, the flow improver is input with the help of the mixing bag and the mixed output is turned on to further improve the transportation efficiency. This process is particularly suitable for heavy oil transportation in low temperature environments through real-time monitoring and intelligent regulation, and realizes efficient and stable transportation of heavy oil. This process effectively prevents pipeline blockage, reduces energy consumption and maintenance costs during transportation, improves transportation efficiency and safety, is particularly suitable for heavy oil transportation in low temperature environments, and has significant technical effects and application value; 2. Use the output pressure transmitter to accurately collect the delivery pressure data of the outlet tee. When the pressure is detected to be over 2.5MPa, the system automatically closes the check valve and starts the output tee. Through the precise control of the electric valve, the heavy oil at the output end of the screw pump is guided to the return pipe tee short section and the return pipe short section, and enters the filter for preliminary purification. The purified heavy oil is then heated by the electric belt to ensure its fluidity, and finally safely introduced into the oil well. It not only effectively prevents overpressure from damaging pipelines and equipment, but also improves the delivery quality and efficiency of heavy oil through precise control and pretreatment, and enhances the stability and reliability of the entire oil transportation system; 3. When the conveying pressure is in the normal range of 0.3-2.5MPa, the impurities in the pipeline can be effectively discharged through the coordinated cooperation of the inlet and outlet gate valve ends and the liquid inlet short section, while the flow improver is introduced to improve the fluidity of the heavy oil. In addition, the coordinated use of the mixing joint and the gate valve can fully mix the flow improver with the heavy oil, thereby improving the conveying efficiency and the fluidity of the heavy oil. When the pressure is lower than 0.3MPa, the system automatically turns off the electric heating belt and stops introducing the flow improver, avoiding energy waste and reflecting the intelligent energy-saving and protection mechanism. It enhances the adaptability and flexibility of the oil transportation process, improves the convenience and safety of operation, optimizes energy utilization, reduces operating costs, and provides strong technical support for the efficient transportation of heavy oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention; Figure numerals: 1. screw pump; 2. output tee; 3. check valve; 4. mixing bag; 5. inlet and outlet gate valves; 6. outlet tee; 7. electric valve; 8. sweep line external connector; 9. short circuit; 10. filter; 11. liquid inlet short section; 12. return pipe short section; 13. return pipe tee short section; 14. safety valve elbow; 15. spring-loaded safety valve; 16. mixing gate valve; 17. mixing connector; 18. output pressure transmitter; 19. temperature transmitter; 20. vibration sensor; 21. return pressure transmitter; 22. temperature sensor; 23. electric belt; 25. delivery pipeline. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1 like Figure 1 As shown, this embodiment provides an oil well oil delivery device suitable for delivering high-viscosity crude oil, including a screw pump 1 arranged at the wellhead, an output tee 2 is provided at the output end of the screw pump 1, one end of the output tee 2 is connected to the output end of the screw pump 1, one end is connected to a check valve 3, and the other end is connected to a return line, the return line passes into the pipeline of the screw pump 1 and is connected to the wellhead, a pressure detection component is provided at the output end of the screw pump 1 and the return line, an output mixing component is provided at the output end of the check valve 3, a delivery pipeline 25 is provided at the output end of the output mixing component, the delivery pipeline 25 is connected to the exchange station, and an electric heating belt 23 is laid on the periphery of the delivery pipeline 25.

[0024] Therefore, when the temperature is too low or the pipeline transportation pressure is too high, a pressure detection component is set to monitor according to the pipeline transportation pressure, and the electric heating belt 23 is turned on to prompt the transportation pipeline 25 to maintain a certain temperature to avoid the precipitation of heavy oil wax due to low temperature. At the same time, a mixing component is set to facilitate the addition of flow improvers during the transportation process to improve the fluidity of the heavy oil. At the same time, when the pipeline is blocked, the pressure detection component feedback is opened to open the reflux pipeline to re-introduce the extracted heavy oil into the well, thereby avoiding the screw pump 1 from being blocked and reducing the risk of device damage. It has high economic value to cope with the long and cold winter climate. Through remote control and maintenance, the workload of the staff is greatly reduced and the work efficiency is improved.

[0025] Reference Figure 1 The return pipeline includes a return pipe tee short section 13 arranged at one end of the output tee 2, a safety valve elbow 14 is arranged at the other end of the return pipe tee short section 13, a return pipe short section 12 is arranged at the third end, a spring-type safety valve 15 is arranged on the safety valve elbow 14, an electric valve 7 is arranged on the return pipe short section 12, a filter 10 is arranged at the end of the return pipe short section 12, an inlet and outlet gate valve 5 is also arranged on the filter 10, and an inlet short section 11 is arranged at the end of the inlet and outlet gate valve 5. A short circuit 9 is arranged at the output end of the filter 10, and the short circuit 9 is connected to the pipeline of the screw pump 1 and connected to the wellhead. An electric belt 23 is also laid on the periphery of the short circuit 9, and the heating temperature of the electric belt 23 does not exceed 40°C. A temperature sensor 22 and a return pressure transmitter 21 are distributed on the short circuit 9.

[0026] Reference Figure 1 The output mixing component includes a mixing bag 4 arranged at the output end of the check valve 3, and a mixing gate valve 16 and a mixing joint 17 are arranged on the mixing bag 4 in sequence. The output end of the mixing bag 4 is connected to an inlet and outlet gate valve 5, and the inlet and outlet gate valve 5 is connected to an outlet tee 6. One end of the outlet tee 6 is connected to the inlet and outlet gate valve 5, and one end is connected to the conveying pipeline 25, and the other end is provided with an electric valve 7 and a sweeping line external joint 8.

[0027] In order to improve the operation detection of the entire device and ensure the operation stability, refer to Figure 1, an output pressure transmitter 18 is provided on the pipe wall of one end of the outlet tee 6 connected to the inlet and outlet gate valve 5. The output pressure transmitter 18 is provided on the pipe wall of the outlet tee 6, which is convenient for monitoring the pressure of the heavy oil at the outlet, and for monitoring the pressure before the heavy oil enters the delivery pipeline 25, so as to preliminarily judge the fluidity of the heavy oil and facilitate monitoring the operating status. A vibration sensor 20 and a temperature transmitter 19 are provided at the output end of the screw pump 1. A vibration sensor 20 and a temperature transmitter 19 are provided at the output end of the screw pump 1. On the one hand, the vibration sensor 20 can detect the operating status of the screw pump 1, and monitor the vibration of the screw pump 1 during operation in real time, including parameters such as vibration frequency and amplitude. By analyzing these vibration data, the operating status of the pump can be accurately grasped and it can be judged whether it is within the normal working range. When the speed and load of the pump change, its vibration characteristics will also change accordingly. The sensor can capture these changes in time, so as to preliminarily judge whether blockage and pipeline overpressure occur. At the same time, a temperature transmitter 19 is provided to monitor the wellhead temperature of the heavy oil, and then judge the status of the heavy oil.

[0028] The operation process of this device is as follows: An oil well oil transportation process for transportation of crude oil with high viscosity using the above oil transportation device comprises the following steps: Step S1: cleaning the scanning line; Step S2: starting the screw pump 1, initially extracting the heavy oil, and detecting the outlet temperature and operating status; Step S3: Turn on the electric belt 23 at a low temperature according to the local temperature; Step S4: the output pressure transmitter 18 monitors the heavy oil delivery pressure, and when overpressure occurs, the heavy oil circulation is started to introduce the heavy oil into the oil well. When the pressure is too high, the spring-loaded safety valve 15 is triggered, and the contents of the pipeline are discharged from the spring-loaded safety valve 15; Step S5: When an overpressure occurs, impurities are discharged and flow improver is introduced through the liquid inlet nipple 11, and then the flow improver is introduced through the mixing joint 17 in coordination with the mixing gate valve 16 for mixed output; Step S6: In extremely low temperature conditions, flow improver is input through the mixing bag 4 and mixing output is started.

[0029] Among them, in step S1, cleaning and sweeping the line includes preparing cleaning agents, line sweeping equipment, safety protection equipment, etc. in advance. Then, close all the inlet and outlet valves of the oil pipeline to isolate the pipeline from the oil well and oil storage equipment. Inject an appropriate amount of cleaning agent through a special electric valve 7 and a line sweeping external connector 8. Start the line sweeping equipment to allow the cleaning agent to circulate in the pipeline, fully flush the inner wall of the pipeline, remove residual crude oil, impurities and scale, and the circulation cleaning time is generally 30-60 minutes. After cleaning is completed, open the drain port to discharge the cleaning fluid containing impurities from the pipeline, and ensure that the cleaning fluid is properly handled. Finally, use professional testing equipment to check the inner wall of the pipeline to ensure that there is no residue and scale, and close the drain port after passing the inspection.

[0030] Among them, in step S2, a vibration sensor 20 is used to detect the operating status of the screw pump 1, abnormal vibration is detected in advance, and a remote early warning signal is issued. The temperature transmitter 19 is used to monitor the temperature of the heavy oil out of the well, judge the state of the heavy oil, and remote monitoring and operation are performed in combination with the temperature of the day. The ambient temperature is low, and the screw pump 1 is preheated. The preheating time is generally 15-30 minutes. When starting the screw pump 1, the speed of the pump is slowly increased to avoid mechanical shock. During operation, the temperature sensor 22 is used to monitor the outlet temperature of the heavy oil in real time. At the same time, the operating status of the pump is monitored by the vibration sensor 20 and the pressure transmitter to ensure that the vibration is normal and the outlet pressure is between 0.3-2.5MPa. The monitoring data is recorded in real time in the monitoring system. When the data analysis finds an abnormality, the operating parameters of the pump are adjusted in time or the equipment is checked to ensure the stable operation of the screw pump 1. Step S2 uses the vibration sensor 20 to capture the abnormal vibration of the screw pump 1 in real time, warn in advance, and prevent failures; at the same time, the temperature transmitter 19 accurately senses the temperature of the heavy oil out of the well, and combines the temperature data to realize remote intelligent monitoring and operation. It has greatly improved the reliability and safety of oil well transportation, optimized operation management, reduced maintenance costs, enhanced the adaptability and flexibility of heavy oil transportation, and provided a strong guarantee for efficient and stable oil well production.

[0031] Among them, in step S4, the delivery pressure of the outlet tee 6 is collected by the output pressure transmitter 18. When the pressure is greater than 2.5 MPa, the check valve 3 is closed, the output tee 2 is started, and the heavy oil at the output end of the screw pump 1 is introduced into the filter 10 along the return pipe tee short section 13 and the return pipe short section 12 through the electric valve 7 for preliminary purification of the heavy oil, and then introduced into the oil well after being heated by the electric belt 23 through the short circuit 9. At the same time, the flow improver is introduced through the mixing gate valve 16 and the mixing joint 17 to eliminate the blockage. The delivery pressure data of the outlet tee 6 is accurately collected by the output pressure transmitter 18. When the pressure exceeds 2.5 MPa, the system automatically closes the check valve 3 and starts the output tee 2. Through the precise control of the electric valve 7, the heavy oil at the output end of the screw pump 1 is guided to the return pipe tee short section 13 and the return pipe short section 12, and enters the filter 10 for preliminary purification. The purified heavy oil is then heated by the electric belt 23 to ensure its fluidity and finally safely introduced into the oil well. It not only effectively prevents overpressure from damaging pipelines and equipment, but also improves the transportation quality and efficiency of heavy oil through precise control and pretreatment, and enhances the stability and reliability of the entire oil transportation system.

[0032] Among them, in step S5, when the pressure is between 0.3-2.5 MPa, the impurities are discharged and the flow improver is introduced through the end of the inlet and outlet gate valve 5 in conjunction with the liquid inlet short section 11, and the flow improver is introduced through the mixing joint 17 in conjunction with the mixing gate valve 16 for mixed output; when the pressure is <0.3 MPa, the electric heating belt 23 is closed and the flow improver is stopped from being introduced. When the conveying pressure is in the normal range of 0.3-2.5 MPa, the impurities in the pipeline can be effectively discharged through the coordinated cooperation of the end of the inlet and outlet gate valve 5 and the liquid inlet short section 11, and the flow improver is introduced to improve the fluidity of the heavy oil. In addition, the use of the mixing joint 17 and the gate valve can fully mix the flow improver with the heavy oil, thereby improving the conveying efficiency and the fluidity of the heavy oil. When the pressure is lower than 0.3 MPa, the system automatically closes the electric heating belt 23 and stops introducing the flow improver, avoiding energy waste and reflecting the intelligent energy-saving and protection mechanism. It enhances the adaptability and flexibility of the oil transportation process, improves the convenience and safety of operation, optimizes energy utilization, reduces operating costs, and provides strong technical support for the efficient transportation of heavy oil.

[0033] The present invention has a great improvement on the existing heavy oil transportation. By performing a cleaning and sweeping operation, impurities in the transportation pipeline 25 are cleaned. Subsequently, the screw pump 1 is started to initially extract the heavy oil, and the outlet temperature and operating status are detected in real time to ensure the normal operation of the pump. According to the local temperature, the electric belt 23 is turned on in time to prevent the crude oil from blocking the pipe due to low temperature. The output pressure transmitter 18 is used to continuously monitor the delivery pressure. Once an overpressure situation occurs, the heavy oil circulation is immediately started to guide the heavy oil back to the oil well, and the material in the pipeline is discharged through the spring-loaded safety valve 15 when the pressure is too high to ensure safety. In the case of overpressure, impurities can be discharged or flow improvers can be introduced through the liquid inlet short section 11 to optimize the transportation conditions. In the face of extreme low temperatures, the flow improver is input with the help of the mixing bag 4 and the mixed output is turned on to further improve the transportation efficiency. This process is particularly suitable for heavy oil transportation in low temperature environments through real-time monitoring and intelligent regulation, and realizes efficient and stable transportation of heavy oil. This process effectively prevents pipeline blockage, reduces energy consumption and maintenance costs during transportation, and improves transportation efficiency and safety. It is particularly suitable for heavy oil transportation in low-temperature environments and has significant technical effects and application value.

[0034] It should be noted that the component connection relationships not specifically mentioned in this application are assumed to adopt the existing technology. Since they do not involve the invention and are widely used in the existing technology, the structural connection relationships are not described in detail.

Claims

1. An oil well delivery device suitable for delivering crude oil with high viscosity, comprising a screw pump (1) arranged at a wellhead, characterized in that: The output end of the screw pump (1) is provided with an output tee (2), one end of the output tee (2) is connected to the output end of the screw pump (1), one end is connected to a check valve (3), and the other end is connected to a return line, the return line enters the pipeline of the screw pump (1) and is in communication with the wellhead, the output end of the screw pump (1) and the return line are provided with a pressure detection component, the output end of the check valve (3) is provided with an output mixing component, the output end of the output mixing component is provided with a conveying pipeline (25), the conveying pipeline (25) is connected to the exchange station, and an electric heating belt (23) is laid on the periphery of the conveying pipeline (25).

2. The oil well oil delivery device adapted to the delivery of crude oil with high viscosity according to claim 1, characterized in that: The output mixing component comprises a mixing bag (4) arranged at the output end of the check valve (3), the mixing bag (4) being provided with a mixing gate valve (16) and a mixing joint (17) in sequence, the output end of the mixing bag (4) being connected with an inlet and outlet gate valve (5), the inlet and outlet gate valve (5) being connected with an outlet tee (6), one end of the outlet tee (6) being connected with the inlet and outlet gate valve (5), one end being connected with the delivery pipeline (25), and the other end being provided with an electric valve (7) and a sweeping line external joint (8).

3. The oil well oil delivery device adapted to the delivery of crude oil with high viscosity according to claim 2, characterized in that: The return pipeline comprises a return pipe tee short section (13) arranged at one end of the output tee (2); the other end of the return pipe tee short section (13) is provided with a safety valve elbow (14); the third end is provided with a return pipe short section (12); the safety valve elbow (14) is provided with a spring-loaded safety valve (15); the return pipe short section (12) is also provided with an electric valve (7); a filter (10) is provided at the end of the return pipe short section (12); an inlet and outlet gate valve (5) is also provided on the filter (10); a liquid inlet short section (11) is provided at the end of the inlet and outlet gate valve (5); a short circuit (9) is provided at the output end of the filter (10); the short circuit (9) is connected to the pipeline of the screw pump (1) and is connected to the wellhead.

4. The oil well oil delivery device adapted to the delivery of crude oil with high viscosity according to claim 3, characterized in that: An electric belt (23) is also laid on the periphery of the short circuit (9), and the heating temperature of the electric belt (23) does not exceed 40°C. A temperature sensor (22) and a reflux pressure transmitter (21) are distributed on the short circuit (9).

5. An oil well oil delivery device adapted for delivering crude oil with high viscosity according to any one of claims 2 or 4, characterized in that: An output pressure transmitter (18) is provided on the pipe wall of one end of the outlet tee (6) connected to the inlet and outlet gate valve (5).

6. The oil well oil delivery device adapted to the delivery of crude oil with high viscosity according to claim 1, characterized in that: The output end of the screw pump (1) is provided with a vibration sensor (20) and a temperature transmitter (19).

7. An oil well oil transportation process for transporting crude oil with high viscosity using the oil transportation device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1: cleaning the scanning line; Step S2: starting the screw pump (1), initially extracting the heavy oil, and detecting the outlet temperature and operating status; Step S3: Turn on the electric heating belt (23) at a low temperature according to the local temperature; Step S4: the output pressure transmitter (18) monitors the heavy oil delivery pressure, and when overpressure occurs, the heavy oil circulation is started to guide the heavy oil into the oil well. When the pressure is too high, the spring-loaded safety valve (15) is triggered, and the contents of the pipeline are discharged from the spring-loaded safety valve (15); Step S5: when an overpressure occurs, impurities are discharged and flow improver is introduced through the liquid inlet nipple (11), and then the flow improver is introduced through the mixing joint (17) in conjunction with the mixing gate valve (16) for mixed output; Step S6: In extremely low temperature conditions, flow improver is input through the mixing bag (4) and mixing output is started.

8. The oil well oil transportation process suitable for transportation of crude oil with high viscosity according to claim 7, characterized in that: In step S2, a vibration sensor (20) is used to detect the operating state of the screw pump (1), abnormal vibration is detected in advance, and a remote warning signal is issued. A temperature transmitter (19) is used to monitor the temperature of the heavy oil out of the well, and the state of the heavy oil is determined. In combination with the temperature of the day, remote monitoring and operation are performed.

9. The oil well oil delivery device and delivery process suitable for delivering crude oil with high viscosity according to claim 7, characterized in that: In step S4, the delivery pressure of the outlet tee (6) is collected through the output pressure transmitter (18). When the pressure is greater than 2.5 MPa, the check valve (3) is closed, the output tee (2) is started, and the heavy oil at the output end of the screw pump (1) is introduced into the filter (10) through the return pipe tee short section (13) and the return pipe short section (12) through the electric valve (7) to initially purify the heavy oil, and then the heavy oil is introduced into the oil well after being heated by the electric heating belt (23) through the short circuit (9).

10. The oil well oil delivery device and delivery process suitable for delivering crude oil with high viscosity according to claim 9, characterized in that: In step S5, when the pressure is between 0.3-2.5 MPa, the impurities are discharged and the flow improver is introduced through the end of the inlet and outlet gate valve (5) in conjunction with the liquid inlet short section (11), and the flow improver is introduced through the mixing joint (17) in conjunction with the mixing gate valve (16) for mixed output; when the pressure is less than 0.3 MPa, the electric heating belt (23) is turned off and the introduction of the flow improver is stopped.

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