An integrated pipe string for production and temperature-pressure monitoring of an electrical submersible pump unit and a control method

Abstract

The present invention provides an integrated production and temperature-pressure monitoring string for an electrical submersible pump unit and a control method, belonging to the technical field of oil exploitation. The present invention includes an electrical submersible pump unit, a tubing string, a cable for monitoring downhole temperature, pressure and power, sensors for monitoring temperature and pressure, a wellhead, a power control box, and a temperature-pressure monitoring box. One end of the tubing string is connected to the electrical submersible pump unit, and the other end is connected to the wellhead; one end of the cable passes through the wellhead and is respectively connected to the power control box and the temperature-pressure control box. The control method is to set the optimal pressure and optimal temperature working range E with the motor temperature T as the abscissa and the pump suction pressure P as the ordinate. If the actual parameters are not within this range, the working parameters need to be adjusted to ensure that the electrical submersible pump unit adjusts to the optimal working area in a timely manner. The beneficial effect is that it can obtain downhole power, temperature and pressure data in real time, track and analyze downhole working conditions, guide on-site timely and accurate regulation of oil production parameters, and improve the development effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil extraction, and particularly relates to an integrated pipe string for production and temperature-pressure monitoring of an electric submersible pump unit and a control method therefor. Background Art

[0002] SAGD (Steam Assisted Gravity Drainage) is a cutting-edge technology for developing extra-heavy oil. Its mechanism is to inject steam into the steam injection well. The steam overrides upward in the formation to form a steam chamber. The steam chamber expands upward and laterally, exchanges heat with the crude oil in the oil layer, and the heated crude oil and steam condensate drain by gravity to the horizontal production well below for production.

[0003] SAGD production wells are characterized by high temperature, large displacement, and large well deviation. In recent years, the domestic production of the high-temperature electric submersible pump lifting process has been realized, and its characteristics of simple operation, low maintenance cost, and convenient adjustment of operating parameters have been unanimously recognized, playing an important role in SAGD development. In the prior art, the patent application number 2019107138477 provides a method for injection-production control of an SAGD high-temperature electric submersible pump well group. This patent only considers the influence of steam injection intensity, downhole temperature, electric submersible pump frequency, oil well production, etc. on the efficient operation of the electric submersible pump, but does not consider the influence of pump depth position and pump inlet pressure on the production efficiency of the electric submersible pump, that is, there are problems that production and temperature-pressure monitoring cannot be implemented synchronously and there is a lack of basis for on-site dynamic control. Summary of the Invention

[0004] To solve the above problems existing in the prior art, the present invention discloses an integrated pipe string for production and temperature-pressure monitoring of an electric submersible pump unit and a control method therefor, which can obtain downhole temperature and pressure data in real time, track and analyze downhole working conditions, guide on-site timely and accurate adjustment of oil production parameters, and further improve the SAGD development effect.

[0005] The technical solution adopted by the present invention is: an integrated pipe string for production and temperature-pressure monitoring of an electric submersible pump unit, including an electric submersible pump unit, a tubing, sensors for monitoring downhole temperature and pressure, a wellhead, a power control box, a temperature-pressure monitoring box, and a cable. One end of the tubing is connected to the electric submersible pump unit, and the other end of the tubing is connected to the wellhead; one end of the cable passes through the wellhead and is respectively connected to the power control box and the temperature-pressure control box.

[0006] Further, the electric submersible pump unit includes a motor, a motor protector, an oil-gas separator, and an electric submersible pump. The motor is connected to the motor protector through a flange, the motor protector is connected to the oil-gas separator through a flange, the oil-gas separator is connected to the electric submersible pump through a flange, and the electric submersible pump is connected to the tubing through a thread.

[0007] Further, the sensors are divided into temperature sensors and pressure sensors.

[0008] Furthermore, the temperature sensor is respectively fixed to the motor and the electric submersible pump through cable buckles.

[0009] Furthermore, the temperature sensors at the motor are respectively arranged at 1 / 3 and 2 / 3 of the motor axis, and two temperature sensors are arranged on both sides of the motor to facilitate more accurate temperature measurement.

[0010] Furthermore, the temperature sensor and the pressure sensor are arranged at the suction port of the electric submersible pump, and a temperature measuring point and a pressure measuring point are respectively arranged.

[0011] Furthermore, the cables are divided into power cables, pressure measuring cables and temperature measuring cables. The power cables are connected to the motor through cable connectors, the pressure measuring cables are connected to the pressure sensor, and the temperature measuring cables are connected to the temperature sensor. The power cables, pressure measuring cables and temperature measuring cables are all fixed to the oil pipe coupling or the outer wall of the oil pipe through cable protectors. The cable protectors play a role in fixing the cables to prevent the cables from piling up and winding.

[0012] Furthermore, the oil pipe is inserted into the casing, and an oil pipe coupling is provided between the oil pipes.

[0013] Furthermore, the cable is fixed to the oil pipe by a cable buckle to avoid collision between the cable and the casing, which may cause the cable to be squeezed and broken.

[0014] Furthermore, the oil pipe is connected to the wellhead by threaded connection.

[0015] Furthermore, the power control box is also connected to the transformer.

[0016] The on-site operation steps of the present invention are as follows:

[0017] First, select a high-temperature submersible pump with corresponding head and displacement according to the well depth structure, downhole temperature, and fluid supply capacity, and match the length of the oil pipe, power and monitoring cable according to the lowering depth; then, lower the oil pipe and the cable for monitoring the downhole temperature, pressure and power into the well simultaneously, install a cable protector on each oil pipe coupling, and install a cable clip on each oil pipe; secondly, install the wellhead, and three cables pass through the wellhead and are connected to the corresponding control box on the ground; finally, monitor the downhole power, pressure, and temperature parameters in real time, and adjust the operating frequency of the submersible pump in time according to the parameters, so that the submersible pump can work in a safe and efficient range.

[0018] The control method of the present invention is as follows:

[0019] According to the characteristics of the SAGD electric submersible pump unit, taking the downhole temperature T and pressure P as variable parameters, with the motor temperature T as the abscissa and the pump suction pressure P as the ordinate, the area covered by the abscissa and ordinate is divided into nine working zones A - K, and a schematic diagram of temperature and pressure monitoring zoning is drawn; First, determine the optimal pressure and optimal temperature working range E for setting the electric submersible pump unit, that is, initially set the optimal temperature range T1 - T2 and the optimal pressure range P1 - P2. If the actual parameters are not within this range E, the working parameters need to be adjusted in time to ensure its operation effect and ensure that the electric submersible pump unit adjusts to the optimal working zone in time; The downhole temperature mentioned refers to the average value of the temperatures measured by two temperature sensors at the motor.

[0020] When the downhole temperature and pressure are controlled within the optimal working range E, no adjustment is required;

[0021] When the downhole temperature is higher than the highest temperature T2 in the optimal state or the pressure is lower than the lowest pressure P1 in the optimal state, the operating frequency needs to be reduced, adjusted downward in steps of 2 Hz until the temperature and pressure are controlled within the optimal working range E;

[0022] When the downhole temperature is lower than the lowest temperature T1 in the optimal state or the pressure is higher than the highest pressure P2 in the optimal state, the operating frequency needs to be increased, adjusted upward in steps of 1 Hz until the temperature and pressure are controlled within the optimal working range E.

[0023] The beneficial effect of the present invention adopting the above technical solution is that it can obtain downhole temperature and pressure data in real time, track and analyze downhole working conditions, guide on-site timely and accurately adjust oil production parameters, and further improve the SAGD development effect. Brief Description of the Drawings

[0024] Figure 1 It is a schematic diagram of an integrated pipe string for the production and temperature - pressure monitoring of an electric submersible pump unit;

[0025] Figure 2 It is a schematic diagram of a downhole cable protector;

[0026] Figure 3 It is a schematic diagram of temperature - pressure monitoring zoning for the control method of the present invention;

[0027] Figure 4 It is a schematic diagram of the process in the temperature - pressure monitoring zoning of the present invention where the temperature is less than T1;

[0028] Figure 5 It is a schematic diagram of the process in the temperature - pressure monitoring zoning of the present invention where the temperature is between T1 - T2;

[0029] Figure 6 It is a schematic diagram of the process in the temperature - pressure monitoring zoning of the present invention where the temperature is greater than T2.

[0030] Description of the reference numerals in the figure: 1. Motor, 2. Motor protector, 3. Oil-gas separator, 4. Electrical submersible pump, 5. Temperature sensor, 5.1 Temperature sensor A, 5.2 Temperature sensor B, 6. Pressure sensor, 6.1 Temperature sensor C, 7. Casing, 8. Tubing, 9. Cable protector, 10. Cable buckle, 11. Temperature measurement cable, 12. Pressure measurement cable, 13. Wellhead, 14. Transformer, 15. Power control box, 16. Temperature and pressure control box, 17. Power cable, 18. Tubing coupling. Detailed implementation mode

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0032] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, rather than all, embodiments of the present invention. The following description of at least one exemplary embodiment is actually only illustrative and in no way restricts the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0033] To further understand the content of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments:

[0034] As Figures 1 to 6 shown, an integrated string for the production and temperature and pressure monitoring of an electrical submersible pump unit includes an electrical submersible pump unit, a tubing 8, a temperature sensor 5 and a pressure sensor 6 for monitoring the downhole temperature and pressure, a wellhead 13, a power control box 15, and a temperature and pressure monitoring box 16. One end of the tubing 8 is connected to the electrical submersible pump unit, and the other end of the tubing 8 is connected to the wellhead 13; one end of the cable passes through the wellhead 13 and is respectively connected to the power control box 15 and the temperature and pressure control box 16.

[0035] Further, the electrical submersible pump unit includes a motor 1, a motor protector 2, an oil-gas separator 3, and an electrical submersible pump 4. The motor 1 is connected to the motor protector 2 through a flange, the motor protector 2 is connected to the oil-gas separator 3 through a flange, the oil-gas separator 3 is connected to the electrical submersible pump 4 through a flange, and the electrical submersible pump 4 is connected to the tubing 8 through a thread.

[0036] Furthermore, the temperature sensor 5 is divided into a temperature sensor A5.1, a temperature sensor B5.2 and a temperature sensor C6.1, wherein the temperature sensor A5.1 and the temperature sensor B5.2 are fixed to the motor 1 via a cable buckle 10, and the pressure sensor 6 and the temperature sensor C6.1 are fixed to the electric submersible pump 4 via a cable buckle 10.

[0037] Furthermore, the temperature sensor A5.1 and the temperature sensor B5.2 at the motor 1 are respectively arranged at 1 / 3 and 2 / 3 of the axial direction of the motor 1, and the temperature sensor A5.1 and the temperature sensor B5.2 are distributed on both sides of the motor 1.

[0038] Furthermore, the temperature sensor C6.1 and the pressure sensor 6 are arranged at the suction port of the electric submersible pump 4.

[0039] Furthermore, the cables are divided into a power cable 17, a pressure measuring cable 12 and a temperature measuring cable 11. The power cable 17 is connected to the motor 1 through a cable connector, the pressure measuring cable 12 is connected to the pressure sensor 6, and the temperature measuring cable 11 is connected to the temperature sensor 5. The power cable 17, the pressure measuring cable 12 and the temperature measuring cable 11 are all fixed to the oil pipe coupling 18 or the outer wall of the oil pipe 8 through a cable protector 9. The cable protector 9 plays a role in fixing the cables to prevent the cables from being piled up and entangled.

[0040] Furthermore, the oil pipe 8 is inserted into the casing 7 , and an oil pipe coupling 18 is provided between the oil pipes 8 .

[0041] Furthermore, the cable is fixed to the oil pipe 8 by a cable buckle 10 to prevent the cable from colliding with the casing 7 and causing the cable to be squeezed and broken.

[0042] Furthermore, the oil pipe 8 is connected to the wellhead 13 by threaded connection.

[0043] Furthermore, the power control box 15 is also connected to the transformer 14 .

[0044] The on-site operation steps of the present invention are as follows:

[0045] First, according to the well depth structure, downhole temperature and fluid supply capacity, a high-temperature submersible pump with corresponding head and displacement is selected, and the lengths of the oil pipe 8, power cable 17, pressure measuring cable 12 and temperature measuring cable 11 are arranged according to the lowering depth; then, the oil pipe 8 and the cable for monitoring downhole temperature, pressure and power are synchronously lowered into the well, and a cable protector 9 is installed on each oil pipe coupling 18, and a cable clip 10 is installed on each oil pipe 8; secondly, the wellhead 13 is installed, and the three cables pass through the wellhead 13 and are connected to the ground power control box 15 and the temperature and pressure control box 16; finally, the downhole power, pressure and temperature parameters are monitored in real time, and the operating frequency of the submersible pump 4 is adjusted in time according to the parameters, so that the submersible pump 4 works in a safe and efficient range.

[0046] The regulation method of the present invention is as follows:

[0047] According to the characteristics of the SAGD electric submersible pump unit, taking the monitored downhole temperature T and pressure P as variable parameters, with the motor temperature T as the abscissa and the pump suction pressure P as the ordinate, the area covered by the abscissa and ordinate is divided into nine working areas A - K, and a schematic diagram of temperature - pressure monitoring zoning is drawn; First, determine the optimal pressure and optimal temperature working intervals E for setting the electric submersible pump unit, that is, initially set the optimal temperature interval T1 - T2 and the optimal pressure interval P1 - P2. If the actual parameters are not within this interval E, the working parameters need to be adjusted in a timely manner to ensure its operation effect and ensure that the electric submersible pump unit adjusts to the optimal working area in a timely manner; The downhole temperature mentioned refers to the average value of the temperatures measured by the temperature sensor A5.1 at the motor and the temperature sensor B5.2. For the convenience of those skilled in the art to understand, the temperature sensor A5.1, the temperature sensor B5.2, and the temperature sensor C6.1 are all selected as thermocouples, and the pressure sensor 6 is selected as a capillary tube.

[0048] First, determine the optimal working parameters of the temperature and pressure of the electric submersible pump unit;

[0049] When the downhole temperature and pressure are controlled between the optimal working parameters, no adjustment is required;

[0050] When the downhole temperature is higher than the highest temperature T2 in the optimal state or the pressure is lower than the lowest pressure P1 in the optimal state, the operating frequency needs to be lowered, adjusted downward in steps of 2 Hz until the temperature and pressure are controlled between the optimal working parameters;

[0051] When the downhole temperature is lower than the lowest temperature T1 in the optimal state or the pressure is higher than the lowest pressure P2 in the optimal state, the operating frequency needs to be increased, adjusted upward in steps of 1 Hz until the temperature and pressure are controlled between the optimal working parameters.

[0052] Example 1:

[0053] According to the characteristics of the SAGD high - temperature electric submersible pump, taking the monitored downhole temperature T and pressure P as variable parameters, a schematic diagram of temperature - pressure monitoring zoning is drawn. As Figure 3 shown, initially set the optimal temperature interval T1 - T2 and the optimal pressure interval P1 - P2, and divide it into nine working areas A - K according to the real - time monitored temperature and pressure distribution. Adopt the zoning regulation method to ensure that the electric submersible pump adjusts to the optimal working area in a timely manner.

[0054] Taking the current electrical submersible pump unit with a temperature resistance of 250°C and a head of 800m used in SAGD as an example: The best working state of this unit is when the submerged pressure is 1 - 3MPa and the temperature is between 150°C and 240°C. Initially select a current frequency of 25Hz to open the well, and observe the two data of temperature and pressure at any time. When the downhole temperature reaches 240°C or the pressure is lower than 1MPa, the operating frequency must be lowered, adjusting downward in steps of 2Hz; when the downhole pressure is higher than 3MPa, the operating frequency can be increased, adjusting upward in steps of 1Hz until the temperature remains below 240°C and the pressure is controlled between 1 - 3MPa. That is, when the present invention reaches the designed position, through the ground control box, set the working temperature between T1 = 150°C and T2 = 240°C and the working pressure between P1 = 1MPa and P2 = 3MPa. If it is not within the above range, adjust it to make it in the optimal working area.

[0055] When the monitored data is in Figure 3 and Figure 4 In the working area A shown, that is, T < T1, P < P1, the data is not within the optimal value range, and the production potential of the electrical submersible pump cannot be exerted. Long - term operation will cause the electrical submersible pump to malfunction due to too low inlet pressure. At this time, the well can be shut in to increase the steam injection volume to further improve the liquid supply capacity of the oil well. When the pressure returns to the normal level of 1 - 3MPa, start the electrical submersible pump for oil production.

[0056] When the monitored data is in Figure 3 and Figure 4 In the working area B shown, that is, T < T1, P1 ≤ P ≤ P2, at this time the frequency f can remain unchanged, increase the steam injection volume of the relevant steam injection wells to increase the oil well production. Observe the temperature T while increasing the steam injection volume to prevent the phenomenon of exceeding T2. Stop until P1 ≤ P ≤ P2 and T1 ≤ T ≤ T2.

[0057] When the monitored data is in Figure 3 and Figure 4 In the working area C shown, that is, T < T1, P > P2, at this time the potential of the oil well is not fully exerted, and the frequency f needs to be increased, with an increase step of 1Hz. Observe for 2 hours and repeat the above steps until P1 ≤ P ≤ P2 and T1 ≤ T ≤ T2.

[0058] When the monitored data is in Figure 3 and Figure 5When the monitored data is in the working area D as shown, i.e., T1 ≤ T ≤ T2, P < P1, in order to avoid the vaporization and flashing of downhole liquid due to low pressure, which has an adverse effect on liquid inlet to the pump, it is necessary to increase the pressure at the pump inlet. At this time, the frequency of the frequency converter needs to be decreased to increase the liquid level height at the pump inlet, i.e., increase the pressure at the pump inlet, with a step size of 2 Hz. At the same time, observe the changes of T and P for 2 hours. Also, according to the temperature and pressure in the tubing, adjust the surface choke to keep the pressure in the tubing within a reasonable range, avoiding the gasification of crude oil during lifting, which has an adverse effect on the oil gathering system. Stop when T1 ≤ T ≤ T2 and P1 ≤ P ≤ P2 are satisfied.

[0059] When the monitored data is in Figure 3 the working area E as shown, i.e., T1 ≤ T ≤ T2, P1 ≤ P ≤ P2, at this time the high-temperature electric submersible pump is in the optimal working condition area. Keep the frequency f unchanged and observe the production situation of the oil well. Make timely adjustments when changes occur.

[0060] When the monitored data is in Figure 3 and Figure 5 the working area F as shown, i.e., T1 ≤ T ≤ T2, P > P2, at this time the potential of the oil well is not fully utilized. It is necessary to increase the frequency f with a step size of 1 Hz. Observe for 2 hours and increase repeatedly, observing for 2 hours each time, until P1 ≤ P ≤ P2 and T1 ≤ T ≤ T2.

[0061] When the monitored data is in Figure 3 and Figure 6 the working area G as shown, i.e., T > T2, P < P1, at this time the temperature is higher than the working temperature of the electric submersible pump. To avoid the electric submersible pump from malfunctioning due to overheating, shut down the well at this time and reduce the steam injection volume of the relevant oil wells. Open the well when the P pressure returns to the required level; shut down the well when the pressure drops again, and repeat this process, i.e., manage according to intermittent well operation.

[0062] When the monitored data is in Figure 3 and Figure 6 the working area H as shown, i.e., T > T2, P1 ≤ P ≤ P2, at this time it is necessary to increase the pressure P at the inlet of the electric submersible pump. The frequency f should be appropriately decreased to increase the pressure at the pump inlet. At the same time, to reduce the temperature T at the pump inlet, reduce the steam injection volume of the relevant injection wells. At this time, the temperature T is still within the safe working range;

[0063] When the monitored data is in Figure 3 and Figure 6When the working area K shown in the figure is reached, that is, T>T2 and P>P2. At this time, to protect the ESP from malfunctioning due to excessive temperature and to ensure the normal production of the oil well and avoid liquid flashing, the frequency f needs to be adjusted downward in a timely manner. The step size of the downward adjustment is 2Hz, and each adjustment is observed for 2 hours. To prevent the ESP from malfunctioning due to high temperature, the steam injection volume of the relevant steam injection wells is reduced at this time to lower the temperature of the produced fluid. At the same time, a liquid with a lower temperature is injected into the annulus between the casing and the tubing to lower the temperature at the pump inlet.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for an integrated production and temperature-pressure monitoring string of an electrical submersible pump unit, characterized in that The integrated pipe string for production and temperature-pressure monitoring of the electrical submersible pump unit includes an electrical submersible pump unit, an oil pipe (8), a temperature sensor (5) and a pressure sensor (6) for monitoring downhole temperature and pressure, a wellhead (13), a power control box (15), and a temperature-pressure control box (16); one end of the oil pipe (8) is connected to the electrical submersible pump unit, and the other end of the oil pipe (8) is connected to the wellhead (13); one end of the cable passes through the wellhead (13) and is respectively connected to the power control box (15) and the temperature-pressure control box (16). The temperature sensor (5) is divided into a temperature sensor A (5.1), a temperature sensor B (5.2) and a temperature sensor C (6.1). Among them, the temperature sensor A (5.1) and the temperature sensor B (5.2) are fixed on the motor (1) through a cable buckle (10), and the pressure sensor (6) and the temperature sensor C (6.1) are fixed on the electrical submersible pump (4) through a cable buckle (10); the temperature sensor A (5.1) and the temperature sensor B (5.2) are respectively arranged at the 1 / 3 and 2 / 3 of the axial direction of the motor (1), and the temperature sensor A (5.1) and the temperature sensor B (5.2) are arranged on both sides of the motor (1), and the temperature sensor C (6.1) and the pressure sensor (6) are arranged at the suction port of the electrical submersible pump (4). The specific regulation method is to take the monitored downhole temperature T and pressure P as variable parameters, take the motor temperature T as the abscissa, and take the pump suction port pressure P as the ordinate. The area covered by the abscissa and the ordinate is divided into nine working areas A-K, and a temperature-pressure monitoring zoning schematic diagram is drawn; First, determine the optimal pressure and optimal temperature working range E for setting the electrical submersible pump unit, that is, initially set the optimal temperature range T1-T2 and the optimal pressure range P1-P2. If the actual parameters of the electrical submersible pump are not in this range E, the working parameters need to be adjusted in time to ensure its operation effect and ensure that the electrical submersible pump unit adjusts to the optimal working area in time. When the downhole temperature and pressure are controlled within the optimal working range E, the electrical submersible pump does not need to be adjusted. When the downhole temperature is higher than the highest temperature T2 in the optimal state or the pressure is lower than the lowest pressure P1 in the optimal state, the electrical submersible pump needs to lower the operating frequency and adjust downward in steps of 2 Hz until the temperature and pressure are controlled within the optimal working range E. When the downhole temperature is lower than the lowest temperature T1 in the optimal state or the pressure is higher than the highest pressure P2 in the optimal state, the electrical submersible pump needs to increase the operating frequency and adjust upward in steps of 1 Hz until the temperature and pressure are controlled within the optimal working range E. The downhole temperature is the average value of the temperatures measured by the temperature sensor A (5.1) and the temperature sensor B (5.2).

2. The regulation method of an integrated production and temperature-pressure monitoring string for an electrical submersible pump unit according to claim 1, wherein The electrical submersible pump unit includes a motor (1), a motor protector (2), an oil-gas separator (3) and an electrical submersible pump (4). The motor (1) is connected to the motor protector (2) through a flange, the motor protector (2) is connected to the oil-gas separator (3) through a flange, the oil-gas separator (3) is connected to the electrical submersible pump (4) through a flange, and the electrical submersible pump (4) is connected to the oil pipe (8) through a thread.

3. The regulation method of an integrated production and temperature-pressure monitoring string for an electrical submersible pump unit according to claim 1, characterized in that, The cables mentioned above are divided into a power cable (17), a pressure measurement cable (12), and a temperature measurement cable (11). The power cable (17) is connected to the motor (1), the pressure measurement cable (12) is connected to the pressure sensor (6), and the temperature measurement cable (11) is connected to the temperature sensor (5). The power cable (17), the pressure measurement cable (12), and the temperature measurement cable (11) are all fixed to the outer wall of the oil pipe (8) through a cable protector (9).

4. A control method for an integrated production and temperature-pressure monitoring string of an electrical submersible pump unit according to claim 3, characterized in that The cables mentioned above are also fixed to the oil pipe (8) through cable clips (10).

5. The regulation method of an integrated string for the production and temperature-pressure monitoring of an electrical submersible pump unit according to claim 1, characterized in that, The power control box (15) is also connected to the transformer (14).

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