A downhole temperature and pressure monitoring device and method of use

Abstract

The application relates to a downhole temperature and pressure monitoring device and a use method, the downhole temperature and pressure monitoring device comprising a jet pump and a downhole tester, the downhole tester being arranged at the lower end of the jet pump and being capable of entering and exiting an oil well along with the jet pump; the jet pump comprising an outer shroud, a pump barrel and a pump core, the downhole tester being threadedly connected with the pump core, the outer shroud being connected with the pump barrel through a plunger, and the pump core and the downhole tester being arranged in the interior of the pump barrel. The technical scheme provided by the application has the characteristics of simple structure, reusability and low cost.

Description

Technical Field

[0001] This invention belongs to the field of offshore heavy oil thermal recovery technology, specifically relating to a downhole temperature and pressure monitoring device and its usage method. Background Technology

[0002] Concentric tube jet pumps are commonly used lifting equipment in crude oil development and production, widely applied in conventional oil recovery, heavy oil thermal recovery, drainage gas recovery, and sand removal oil recovery. When using concentric tube jet pumps for production in oil wells, it is necessary to continuously collect temperature and pressure data at the pump core without affecting normal production. This allows for assessment of the downhole jet pump's operating condition, and based on this condition, the well production parameters can be flexibly adjusted to enhance the lifting effect of the concentric tube jet pump and meet production demands.

[0003] Existing testing instruments such as thermometers and pressure gauges are designed to monitor production data from downhole or other pump types. However, due to factors such as their control methods, they cannot adapt to the well conditions of concentric tube jet pump wells. Conventional concentric tube jet pumps are limited by casing size, tubing size, and the presence of packers, making it impossible to run measuring equipment such as pressure and temperature testers into the well along with the production tubing, thus making it impossible to monitor and obtain relevant data in real time. Summary of the Invention

[0004] To address all or part of the aforementioned problems, the present invention aims to provide a downhole temperature and pressure monitoring device and its usage method, which allows the downhole testing instrument to be lowered into the well together with the jet pump to achieve real-time monitoring of relevant downhole data, overcoming the drawbacks of conventional temperature and pressure testing devices, such as cumbersome procedures and high operating costs.

[0005] According to a first aspect of the present invention, a downhole temperature and pressure monitoring device is provided, comprising a jet pump and a downhole testing instrument, wherein the downhole testing instrument is disposed at the lower end of the jet pump and can enter and exit the oil well along with the jet pump;

[0006] The jet pump includes an outer casing, a pump barrel, and a pump core. The downhole testing instrument is threadedly connected to the pump core. The outer casing is connected to the pump barrel via a plunger. The pump core and the downhole testing instrument are placed inside the pump barrel.

[0007] Furthermore, a step is provided on the inner wall of the outer protective cover, so that the outer protective cover forms a first outer protective cover and a second outer protective cover, wherein the inner diameter of the first outer protective cover is larger than the inner diameter of the second outer protective cover.

[0008] Furthermore, after the pump cylinder is connected to the outer protective cover, a flow channel is formed between the first outer protective cover and the pump cylinder.

[0009] Furthermore, the inner wall of the pump cylinder is provided with a first annular groove and a second annular groove. The first annular groove is located above the second annular groove. An irregular channel is provided on the inner wall of the pump cylinder between the first annular groove and the second annular groove. A through hole is provided on the inner wall of the pump cylinder between the first annular groove and the second annular groove. The through hole communicates with the flow channel.

[0010] Furthermore, the pump core is provided with a power fluid inlet, a formation fluid inlet, and a mixed fluid outlet from top to bottom. An O-ring is provided between the power fluid inlet and the formation fluid inlet. The position of the mixed fluid outlet corresponds to the position of the through hole. The position of the formation fluid inlet corresponds to the position of the first annular groove. The lower end of the pump core corresponds to the position of the second annular groove.

[0011] Furthermore, the pump core is provided with a lifting cup, which is positioned above the power fluid inlet.

[0012] Furthermore, the lower end of the pump core is threadedly connected to the upper end of the downhole testing instrument, and the outer diameter of the downhole testing instrument is smaller than the inner diameter of the pump barrel.

[0013] Furthermore, the plunger is disposed at the lower end of the outer protective cover, the plunger is threadedly connected to the pump cylinder, and a ball valve is placed at the upper end of the plunger.

[0014] Furthermore, the downhole testing instrument is a temperature and pressure testing instrument, which includes a data storage device, a temperature and pressure sensor, and a guide head, wherein the guide head is provided with a fluid transmission channel.

[0015] According to a second aspect of the present invention, a method for using a downhole temperature and pressure monitoring device is provided, comprising the following steps:

[0016] Step 1: Lower the jet pump and the downhole testing instrument into the oil well;

[0017] Step 2: During production, the downhole testing instrument monitors the temperature and pressure downhole;

[0018] Step 3: When data analysis is required, remove the pump core and downhole testing instrument;

[0019] Step 4: Analyze the detection data in the downhole testing instrument.

[0020] The technical solution provided by this invention has the following advantages:

[0021] (1) By combining the jet pump with the downhole testing instrument, the conventional temperature and pressure testing device is pulled out and lowered into the well through hydraulic action, which overcomes the shortcomings of the conventional temperature and pressure testing device, which is complicated and expensive. It avoids the risks brought by the work vehicle and cable, and also makes up for the shortcomings of the jet pump drainage process in real-time dynamic data monitoring.

[0022] (2) It has the characteristics of simple structure and low cost. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the downhole temperature and pressure monitoring device in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the upper cross-sectional structure of the downhole temperature and pressure monitoring device in use according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the lower cross-sectional structure of the downhole temperature and pressure monitoring device in use according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the upper cross-sectional structure of the downhole temperature and pressure monitoring device in the retrieved state according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the lower cross-sectional structure of the downhole temperature and pressure monitoring device in the retrieved state according to an embodiment of the present invention;

[0028] Figure 6 This is a cross-sectional view of the downhole testing instrument in an embodiment of the present invention;

[0029] Figure 7 This is a front view of the downhole testing instrument in an embodiment of the present invention;

[0030] Figure 8 As described in the embodiments of the present invention Figure 7 A sectional view along direction A.

[0031] Explanation of reference numerals in the attached drawings: 1. Outer protective cover; 2. Pump barrel; 3. Plunger; 4. O-ring; 5. Ball valve; 6. Power fluid inlet; 7. First annular groove; 8. Second annular groove; 9. Through hole; 10. Flow channel; 11. Irregular channel; 12. Formation fluid inlet; 13. Mixed fluid outlet; 14. Lifting cup; 15. First outer protective cover; 16. Second outer protective cover; 1A. Guide head; 2A. Fluid transfer channel; 3A. Temperature and pressure sensor; 4A. Sensor cylinder; 5A. Data storage device; 6A. Sealing ring; 7A. Circuit device; 8A. Battery pack; 9A. Battery cylinder; 10A. Downhole testing instrument; 11A. Pump core; 12A. Housing; 13A. Detection module; 14A. Mounting slot; 15A. Threaded connector; 16A. Detailed Implementation

[0032] To better understand the purpose, structure, and function of this invention, the following detailed description of a downhole temperature and pressure monitoring device and its usage method, in conjunction with the accompanying drawings, is provided.

[0033] Example 1

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment discloses a downhole temperature and pressure monitoring device, including a jet pump and a downhole tester 10A. The downhole tester 10A is located at the lower end of the jet pump and can enter and exit the oil well along with the jet pump.

[0035] The jet pump includes an outer cover 1, a pump barrel 2, and a pump core 11A. The downhole test instrument 10A is threadedly connected to the pump core 11A. The outer cover 1 is connected to the pump barrel 2 through a plunger 3. The pump core 11A and the downhole test instrument 10A are placed inside the pump barrel 2.

[0036] To further explain, combining the jet pump with the 10A downhole testing instrument allows for hydraulic lifting and lowering into the well, overcoming the drawbacks of conventional temperature and pressure testing devices, such as cumbersome procedures and high operating costs. It also avoids the risks associated with work vehicles and cables, and compensates for the shortcomings of the jet pump drainage process in real-time dynamic data monitoring.

[0037] To further explain, the plunger 3 is located at the bottom inside the outer cover 1. The internal thread of the outer cover 1 is connected to the external thread of the plunger 3, and the internal thread of the pump barrel 2 is connected to the external thread of the plunger 3, thereby connecting the outer cover 1 and the pump barrel 2 together. The downhole tester 10A is connected to the pump core 11A. They are lowered into the pump barrel together by hydraulic force and start working after reaching the preset position.

[0038] In this embodiment, a step is provided on the inner wall of the outer cover 1, so that the outer cover 1 forms a first outer cover 15 and a second outer cover 16, and the inner diameter of the first outer cover 15 is larger than the inner diameter of the second outer cover 16.

[0039] In this embodiment, after the pump cylinder 2 is connected to the outer cover 1, a flow channel 10 is formed between the first outer cover 151 and the pump cylinder 2.

[0040] To further explain, the inner diameter of the first outer cover 15 is larger than the inner diameter of the second outer cover 16, and the outer diameter of the pump cylinder 2 is adapted to the second outer cover 16. When the pump cylinder 2 is connected to the outer cover 1, the outer diameter of the pump cylinder 2 is smaller than the inner diameter of the first outer cover 15, so a flow channel 10 is formed between the first outer cover 15 and the pump cylinder 2.

[0041] When production is underway, and the downhole testing instrument 10A is needed to monitor the temperature and pressure downhole, the mixture of power fluid and formation fluid will flow to the surface through the flow channel 10. When the downhole testing instrument 10A is needed to start, the surface fluid will be injected into the pump barrel 2 through the flow channel 10.

[0042] In this embodiment, a first annular groove 7 and a second annular groove 8 are provided on the inner wall of the pump cylinder 2. The first annular groove 7 is located above the second annular groove 8. A special-shaped channel 11 is provided on the inner wall of the pump cylinder 2 between the first annular groove 7 and the second annular groove 8. A through hole 9 is provided on the inner wall of the pump cylinder 2 between the first annular groove 7 and the second annular groove 8. The through hole 9 is connected to the flow channel 10.

[0043] To further explain, the openings at both ends of the irregular channel 11 are respectively located at the first annular groove 7 and the second annular groove 8. When production is required and the downhole testing instrument 10A is needed to monitor the temperature and pressure downhole, the formation fluid flows from the opening of the second annular groove 8 to the irregular channel 11 and flows out from the opening of the first annular groove 7 into the formation fluid inlet 12.

[0044] To further explain, the inner wall of the pump cylinder 2 is provided with a through hole 9, which is connected to the flow channel 10, so that the mixed liquid can enter the flow channel 10 through the through hole 9 and be discharged to the ground, or the ground fluid can enter the flow channel 10 and enter the mixed liquid outlet 13 through the through hole 9.

[0045] In this embodiment, the pump core 11A is provided with a power fluid inlet 6, a formation fluid inlet 12 and a mixed fluid outlet 13 from top to bottom. An O-ring 4 is provided between the power fluid inlet 6 and the formation fluid inlet 12. The position of the mixed fluid outlet 13 corresponds to the position of the through hole 9. The position of the formation fluid inlet 12 corresponds to the position of the first annular groove 7. The lower end of the pump core 11A corresponds to the position of the second annular groove 8.

[0046] To further explain, when the pump core 11A is lowered to the preset position of the pump barrel 2, the position of the mixed liquid outlet 13 corresponds to the position of the through hole 9, and the mixed liquid flows from the through hole 9 to the flow channel 10 and back to the ground; the position of the formation fluid inlet 12 corresponds to the position of the first annular groove 7, so that the formation fluid can flow out of the first annular groove 7 through the irregular channel 11 and flow to the formation fluid inlet 12; the lower end of the pump core 11A corresponds to the position of the second annular groove 8.

[0047] To further explain, an O-ring 4 is provided between the power fluid inlet 6 and the formation fluid inlet 12 to prevent the injected power fluid from flowing to the formation fluid inlet 12.

[0048] To further explain, the position of the mixture outlet 13 corresponds to the position of the through hole 9, which facilitates the mixture to enter the flow channel 10 from the through hole 9 and be discharged to the ground.

[0049] In this embodiment, a lifting cup 14 is provided on the pump core 11A, and the lifting cup 14 is located above the power fluid inlet 6.

[0050] To further explain, the lifting cup 14 is bowl-shaped with its opening facing the power fluid inlet 6. When it is necessary to retrieve the pump core 11A and the downhole test instrument 10A back to the surface, the surface fluid enters the pump barrel 2 from the mixed fluid outlet 13 through the flow channel 10. The surface fluid moves upward along the pump barrel 2 and opens the lifting cup 14 on the pump core 11A, thereby retrieving the pump core 11A and the downhole test instrument 10A and sending them to the surface.

[0051] In this embodiment, the lower end of the pump core 11A is threadedly connected to the upper end of the downhole testing instrument 10A, and the outer diameter of the downhole testing instrument 10A is smaller than the inner diameter of the pump barrel 2.

[0052] To further explain, the outer diameter of the downhole tester 10A is smaller than the inner diameter of the pump barrel 2. The formation fluid can reach the position of the first annular groove 7 through the downhole tester 10A. The formation fluid will not be hindered from flowing because the outer diameter of the downhole tester 10A is too large and it is in close contact with the pump barrel 2.

[0053] In this embodiment, the plunger 3 is located at the lower end of the outer cover 1, the plunger 3 is threadedly connected to the pump barrel 2, and a ball valve 5 is placed at the upper end of the plunger 3.

[0054] To further explain, the plunger 3 is located at the lower end of the outer cover 1 and is threadedly connected to the outer cover 1. The other end of the plunger 3 is threadedly connected to the pump barrel 2. The inner diameter of the plunger 3 is smaller than the outer diameter of the ball valve 5. The ball valve 5 is placed at the upper end of the plunger 3 for setting and sealing to prevent formation fluid from entering the pump barrel 2.

[0055] like Figure 6 , Figure 7 and Figure 8 As shown, in this embodiment, the downhole tester 10A is a temperature and pressure tester. The downhole tester 10A includes a data storage device 5A, a temperature and pressure sensor 3A, and a guide head 1A. The guide head 1A is provided with a fluid transfer channel 2A.

[0056] To further explain, the downhole testing instrument 10A includes a housing 12A and a detection module 13A disposed inside the housing 12A. The housing 12A is provided with a fluid transmission channel 2A, which leads to the interior of the housing 12A. The detection module 13A detects the parameters of the downhole fluid through the fluid transmission channel 2A.

[0057] To further explain, the downhole testing instrument 10A is placed at the bottom of the well along with the pump core 11A of the jet pump, and can continuously collect temperature and pressure data at the pump core 11A of the downhole jet pump, so as to flexibly adjust the production parameters of the oil well.

[0058] To further explain, placing the detection module 13A inside the housing 12A helps protect the detection module 13A from the influence of the external environment and allows it to work stably. The housing 12A is provided with a liquid transfer channel 2A, which extends from the outer surface of the housing 12A to the interior of the housing 12A, allowing fluid to enter the interior of the housing 12A through the liquid transfer channel 2A, which is convenient for the detection module 13A to detect.

[0059] In this embodiment, the outer casing 12A includes a guide head 1A, a sensor cylinder 4A, and a battery cylinder 9A connected in sequence by threads;

[0060] The liquid transfer channel 2A is set on the guide head 1A. The liquid transfer channel 2A is in the shape of an inverted T. The detection module 13A is set on the guide head 1A and connected to the liquid transfer channel 2A.

[0061] To further explain, the detachable housing 12A facilitates the installation and removal of the detection module 13A, and also makes it convenient for the inspection and maintenance of the detection module 13A; preferably, the housing 12A is made of a material with high strength and strong corrosion resistance to adapt to the complex environment downhole.

[0062] To further explain, the guide head 1A is connected to the sensor cylinder 4A via a sealing pipe thread, and the sensor cylinder 4A is connected to the battery cylinder 9A via a sealing pipe thread. This facilitates the installation of the detection module 13A and also ensures that the detection module 13A is not affected by downhole fluids and impurities.

[0063] To further explain, the guide head 1A includes a conical body and a cylinder connected to the conical body. The liquid transfer channel 2A is set on the cylinder, wherein the liquid transfer channel 2A is inverted T-shaped, which facilitates the fluid to enter the housing 12A and then exit, ensuring that the fluid will not stay in the housing 12A for a long time, so that the detection module 13A will not be affected by the external environment, and the service life of the detection module 13A can be improved.

[0064] To further explain, the detection module 13A is mounted on the guide head 1A and connected to the liquid transfer channel 2A. The fluid reaches the detection module 13A through the liquid transfer channel 2A, and the detection module 13A performs the detection.

[0065] In this embodiment, a sealing ring 6A is provided at the connection between the sensor cylinder 4A and the battery cylinder 9A.

[0066] To further explain, the sensor cylinder 4A and the battery cylinder 9A are connected by a sealing thread, and a sealing ring 6A is provided at the connection for secondary sealing to ensure that the detection module 13A is not affected by downhole fluid and impurities, thus ensuring that the operation of the detection module 13A is not affected.

[0067] In this embodiment, the detection module 13A includes a temperature and pressure sensor 3A. The upper end of the guide head 1A is provided with a mounting groove 14A. The temperature and pressure sensor 3A is placed inside the mounting groove 14A. The bottom of the mounting groove 14A is connected to the upper end of the liquid transfer channel 2A.

[0068] To further explain, the upper end of the guide head 1A is provided with a mounting groove 14A. Fluid enters the interior of the guide head 1A through the liquid transfer channel 2A and reaches the mounting groove 14A. The temperature and pressure parameters of the fluid are detected by the temperature and pressure sensor 3A installed in the mounting groove 14A.

[0069] In this embodiment, the temperature and pressure sensor 3A includes a temperature sensor and a pressure sensor.

[0070] In this embodiment, the detection module 13A also includes a data storage device 5A, which is placed inside the sensor cylinder 4A and electrically connected to the temperature and pressure sensor 3A.

[0071] To further explain, the data storage device 5A is electrically connected to the temperature and pressure sensor 3A, and the data detected by the temperature and pressure sensor 3A is transmitted to the data storage device 5A for storage.

[0072] In this embodiment, the detection module 13A also includes a battery pack 8A and a circuit device 7A. The battery pack 8A and the circuit device 7A are placed inside the battery casing 9A. The circuit device 7A is electrically connected to the temperature and pressure sensor 3A, the data storage device 5A, and the battery pack 8A, respectively. The battery pack 8A provides power to the temperature and pressure sensor 3A and the data storage device 5A through the circuit device 7A.

[0073] To further explain, the battery pack 8A is detachably placed inside the battery compartment 9A. When it is necessary to replace the battery pack 8A, simply open the battery compartment 9A to replace the battery pack 8A.

[0074] In this embodiment, the battery pack 8A uses a high-temperature resistant battery.

[0075] To further explain, due to the high downhole temperature of heavy oil thermal recovery wells, high-temperature resistant batteries are used in order to ensure that the 8A battery pack can supply power normally.

[0076] In this embodiment, the outer surfaces of the temperature and pressure sensor 3A, the data storage device 5A, and the battery pack 8A are all provided with a protective layer.

[0077] To further explain, the outer surfaces of the temperature and pressure sensor 3A, the data storage device 5A, and the battery pack 8A are all equipped with protective layers, which can prevent the normal operation from being affected by underground vibration or other factors, and can also play a role in moisture protection, waterproofing, and high temperature resistance.

[0078] In this embodiment, a threaded connector 16A is provided at the top of the battery tube 9A;

[0079] The outer walls of the guide head 1A, sensor cylinder 4A, and battery cylinder 9A are all provided with slots 15A that mate with the installation tools.

[0080] To further explain, the top of the battery tube 9A is provided with a threaded connector 16A, which facilitates connection with the pump core 11A of the jet pump.

[0081] To further explain, the outer walls of the guide head 1A, sensor cylinder 4A, and battery cylinder 9A are all provided with slots 15A that cooperate with the installation tools, which facilitates the installation and disassembly of the guide head 1A, sensor cylinder 4A, and battery cylinder 9A.

[0082] In a preferred embodiment, the downhole testing instrument 10A is connected to the pump core 11A of the jet pump via a thread and is lowered into the oil well together. During production, fluid flows through the fluid transmission channel 2A to the temperature and pressure sensor 3A. The temperature and pressure sensor 3A transmits the detected temperature and pressure data to the data storage device 5A. When downhole dynamic data is needed, the downhole testing instrument 10A and the pump core 11A are pulled out together, and the data storage device 5A is connected to a computer or other equipment to read the data. After obtaining the data, the downhole testing instrument 10A and the pump core 11A are lowered back into the well to resume production. This method is reusable and reduces production costs.

[0083] Example 2

[0084] This embodiment discloses a method for using a downhole temperature and pressure monitoring device, including the following steps:

[0085] Step 1: Lower the jet pump and downhole testing instrument 10A into the oil well;

[0086] Step 2: During production, the downhole testing instrument 10A monitors the temperature and pressure downhole;

[0087] Step 3: When data analysis is required, remove pump core 11A and downhole testing instrument 10A;

[0088] Step 4: Analyze the detection data from the downhole testing instrument 10A.

[0089] To further explain step 1, the outer protective cover 1 and the pump barrel 2 are lowered to the preset position in the oil well. Then, the ball valve 5 is inserted into the upper end of the plunger 3 for setting. Finally, the downhole tester 10A is connected to the pump core 11A and placed into the preset position of the pump barrel 2.

[0090] To further explain step 2, after the power fluid is pressurized by the surface booster equipment, it undergoes an energy change upon entering the power fluid inlet 6, thereby generating a pressure difference. Due to the pressure difference, the formation fluid will push the ball valve 5 out of the setting position and enter the interior of the downhole test instrument 10A through the fluid transmission channel on the guide head. The temperature and pressure are detected by the temperature and pressure sensors, and the detected data is transmitted to the data storage device. The remaining formation fluid will enter the formation fluid inlet 12 through the special channel 11. After the formation fluid and power fluid are mixed in the pump core 11A, they flow out through the mixed liquid outlet 13 to the flow channel 10, and finally are discharged to the surface through the flow channel 10.

[0091] like Figure 4 and Figure 5 As shown, step 3 is further explained. The surface fluid enters the pump core 11A from the mixed liquid outlet 13 through the flow channel 10. The surface fluid entering the pump core 11A is divided into two direct currents. One flows out from the formation fluid inlet 12 and passes through the special channel 11 to press down the ball valve 5 to seal the formation fluid. The other flows out from the power fluid inlet 6 and opens the lifting cup 14, thereby lifting the pump core 11A and the downhole test instrument 10A back to the surface.

[0092] To further explain step 4, the pump core 11A and downhole testing instrument 10A are disassembled, the data storage device inside the downhole testing instrument 10A is removed, and the data storage device is connected to a computer or other equipment for data analysis.

[0093] In a preferred embodiment, the data in the data storage device needs to be processed and analyzed by specialized software.

[0094] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by those skilled in the art to which this invention pertains.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions 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, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A downhole temperature and pressure monitoring device, characterized in that, It includes a jet pump and a downhole testing instrument, wherein the downhole testing instrument is located at the lower end of the jet pump and can enter and exit the oil well along with the jet pump; The jet pump includes an outer cover, a pump barrel, and a pump core. The downhole testing instrument is threadedly connected to the pump core. The outer cover is connected to the pump barrel via a plunger. The pump core and the downhole testing instrument are placed inside the pump barrel. The inner wall of the outer shield is provided with steps, forming a first outer shield and a second outer shield. The inner diameter of the first outer shield is larger than the inner diameter of the second outer shield. After the pump cylinder is connected to the outer shield, a flow channel is formed between the first outer shield and the pump cylinder. The inner wall of the pump cylinder is provided with a first annular groove and a second annular groove. The first annular groove is located above the second annular groove. A shaped channel is provided on the inner wall of the pump cylinder between the first annular groove and the second annular groove. A through hole is provided on the inner wall of the pump cylinder between the first annular groove and the second annular groove. The through hole communicates with the flow channel. The pump core is provided with a power fluid inlet, a formation fluid inlet and a mixed fluid outlet from top to bottom. An O-ring is provided between the power fluid inlet and the formation fluid inlet. The position of the mixed fluid outlet corresponds to the position of the through hole. The position of the formation fluid inlet corresponds to the position of the first annular groove. The lower end of the pump core corresponds to the position of the second annular groove. A lifting cup is provided on the pump core. The lifting cup is located above the power fluid inlet.

2. The downhole temperature and pressure monitoring device according to claim 1, characterized in that, The lower end of the pump core is threadedly connected to the upper end of the downhole testing instrument, and the outer diameter of the downhole testing instrument is smaller than the inner diameter of the pump barrel.

3. The downhole temperature and pressure monitoring device according to claim 1, characterized in that, The plunger is located at the lower end of the outer protective cover, the plunger is threadedly connected to the pump cylinder, and a ball valve is placed at the upper end of the plunger.

4. The downhole temperature and pressure monitoring device according to any one of claims 1-3, characterized in that, The downhole testing instrument is a temperature and pressure testing instrument, which includes a data storage device, a temperature and pressure sensor, and a guide head. The guide head is provided with a fluid transmission channel.

5. A method of using the downhole temperature and pressure monitoring device as described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Lower the jet pump and the downhole testing instrument into the oil well; Step 2: During production, the downhole testing instrument monitors the temperature and pressure downhole; Step 3: When data analysis is required, remove the pump core and downhole testing instrument; Step 4: Analyze the detection data in the downhole testing instrument.

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