Concentric tube hydraulic jet pump ground simulation test device

Abstract

The application discloses a ground simulation test device for a concentric tube hydraulic jet pump, which comprises a simulator assembly, a test bench, a water tank pipe junction assembly, and a test pump core dropping hole is arranged at the upper end of the simulator assembly; a three-way pipe I is connected with an upper liquid injection pipeline, a three-way pipe II is connected with a liquid discharge pipeline junction, and a valve is connected with a lower liquid injection pipeline; a water injection pump I of the water tank pipe junction assembly injects liquid in a water tank into the simulator assembly through the lower liquid injection pipeline; a water injection pump II of the water tank pipe junction assembly injects liquid in the water tank into the simulator assembly through the upper liquid injection pipeline; the simulator assembly is communicated with the water tank through a liquid discharge pipeline junction, and liquid in the simulator assembly is discharged into the water tank through the liquid discharge pipeline junction. The device has the advantages of reasonable structure design, convenient operation, small floor space, short construction time, low capital investment, and simple test of the concentric tube hydraulic jet pump on the ground.

Description

Technical Field

[0001] This invention relates to a test device for a concentric tube hydraulic jet pump, and more particularly to a ground simulation test device for a concentric tube hydraulic jet pump, belonging to the field of oil and gas development technology. Background Technology

[0002] With the continuous development of oil and gas fields, the number of highly deviated wells and horizontal wells is gradually increasing, making the rod string wear problem caused by rod-driven production processes increasingly prominent. To solve this problem, various rodless production technologies have emerged, and the concentric tube hydraulic jet pump stands out among many technologies due to its outstanding advantages. However, in the research and development process of the concentric tube hydraulic jet pump, prototype testing has become a difficult problem for the research and development team.

[0003] Currently, tests of concentric tube hydraulic jet pumps are conducted in test wells ranging from tens to hundreds of meters deep, or using large-scale ground simulation devices. Test wells require complex approval processes and specialized drilling teams, resulting in long construction periods; large-scale ground simulation devices occupy a large area and have high equipment maintenance costs. Regardless of whether test wells or large-scale ground simulation devices are used, the investment is high and the testing process is complex, which cannot meet the needs of concentric tube hydraulic jet pumps for process testing during the research and development, structural improvement, and performance optimization stages. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of existing concentric tube hydraulic jet pump test devices, the present invention provides a ground simulation test device for concentric tube hydraulic jet pumps.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a ground simulation test device for a concentric tube hydraulic jet pump, comprising a simulator assembly, a test bench, and a water tank pipe assembly. The simulator assembly is connected in sequence from top to bottom via a three-way valve I, a three-way valve II, a simulation pump, and a valve. The three-way valve I is connected to the upper injection pipeline, the three-way valve II is connected to the drainage manifold, and the valve is connected to the lower injection pipeline. The upper end of the simulator assembly is provided with a test pump core injection hole.

[0006] The water tank manifold, which is part of the water injection pump I, injects the liquid from the water tank into the simulator assembly through the lower injection line; the water injection pump II injects the liquid from the water tank into the inner pipe string of the simulator assembly through the upper injection line; the drain manifold connects the annulus I of the simulator assembly to the water tank.

[0007] The simulator assembly is vertically and fixedly mounted on one side of the test bench, and the connecting plate of the simulator assembly is fixedly connected to the docking plate of the test bench.

[0008] The simulator assembly consists of a tee I, flange II, short section, tee II, flange IV, transition joint, simulator pump, and valve connected sequentially from top to bottom; the test pump core injection hole is located at the upper end of tee I, and a plug is fixedly installed at the upper end of tee I.

[0009] The upper end of the outer pump cylinder of the simulated pump is fixedly connected to the transition joint.

[0010] The inner pipe string of the simulator assembly includes an oil pipe, an inner pump cylinder, and a connector connected in sequence from top to bottom, with the upper end of the oil pipe fixedly connected to the inner hole of flange II.

[0011] The connector is located inside the outer pump cylinder, and a radial sealing ring I is installed between the outer pump cylinder and the connector.

[0012] The outer circle of the oil pipe and the inner pump cylinder is connected to the short section, tee II, flange IV, transition joint, and inner hole of the outer pump cylinder by an annular space I.

[0013] The ground simulation test device includes a control system, a pressure transmitter to monitor the injection pressure of water injection pump I and water injection pump II, and a flow meter to monitor the instantaneous flow of the lower injection pipeline, the upper injection pipeline, and the drain manifold.

[0014] The control system is PLC-controlled, and test parameters and data monitoring are set and read through the main control display screen.

[0015] When the pump core is inserted into the simulated pump through the test pump core insertion hole at the upper end of the tee I, the pump core moves downward along the oil pipe and the inner pump barrel until it sits on the plug connector. A radial sealing ring III is installed between the pump core housing and the plug connector; an annular space II is formed between the pump core housing and the inner pump barrel.

[0016] The pump core housing between the nozzle and the throat is provided with a radial through hole Ⅲ, and a sealing ring Ⅱ is provided above the radial through hole Ⅲ to seal the annular space Ⅱ.

[0017] The pump core housing and the corresponding inner pump cylinder below the throat are provided with radial through holes II, which connect the inner cavity of the pump core to the annular space I; a radial sealing device is installed on one side of the radial through hole II of the pump core housing.

[0018] The lower part of the pump core housing is provided with a radial through hole IV, which allows the inner cavity of the connector to communicate with the annular space II.

[0019] Furthermore, the protective baffles installed on the test bench will block both sides of the simulator assembly and the lower part of the pedal.

[0020] Furthermore, the tee I is connected to the upper injection pipeline via flange I; the tee II is connected to the drain manifold via flange III.

[0021] The beneficial effects of this invention are that it has a reasonable structural design, is easy to operate, occupies a small area, has a short construction time, and requires little capital investment; simple tests of the concentric tube hydraulic jet pump can be completed on the ground, meeting the requirements for process testing of the concentric tube hydraulic jet pump in the research and development, structural improvement, and performance optimization stages. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the ground simulation test device for the concentric tube hydraulic jet pump of the present invention.

[0023] Figure 2 This is a schematic diagram of the simulator assembly structure in this invention.

[0024] Figure 3 This is a schematic diagram of the pump core simulation test in this invention.

[0025] In the diagram: 1. Lifting ring, 2. Plug, 3. Tee I, 4. Flange I, 5. Flange II, 6. Short section, 7. Tee II, 8. Flange III, 9. Flange IV, 10. Transition joint, 11. Outer pump barrel, 12. Socket joint, 13. Sealing ring I, 14. Valve, 15. Lower injection line, 16. Upper injection line, 17. Drain manifold, 18. Connecting plate, 19. Water tank, 20. Water pump II, 21. Water pump I, 22. Oil pipe, 23. Connecting plate, 24. Protective baffle, 25. 26. Pedal, 27. Annular I, 28. Pump core, 29. Annular II, 30. Pump core housing, 31. Sealing ring II, 32. Nozzle, 33. Throat, 34. Sealing device, 35. Radial through hole II, 36. Radial through hole III, 37. Radial through hole I, 38. Check valve, 39. Inner pump barrel, 40. Inner tube string, 41. Radial through hole IV, 42. Sealing ring III, 43. Plug plate, 100. Simulator assembly, 101. Simulation pump, 200. Test bench, 300. Water tank tube assembly. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. However, those skilled in the art should understand that the present invention is not limited to the specific embodiments listed, and any embodiment that conforms to the spirit of the present invention should be included within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "vertical", "up", "down", "left", "right", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing or simplifying the description of this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "seal" should be interpreted broadly. For example, a connection can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection, or an integral connection; it can be a mechanical connection or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two components. A seal can be an oil seal, a packing seal, or other forms of seal. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] See appendix Figure 1 , 2 The present invention relates to a ground simulation test device for a concentric tube hydraulic jet pump, comprising a simulator assembly 100, a test bench 200, and a water tank pipe assembly 300. The simulator assembly 100 includes a tee I3, a tee II7, a simulation pump 101, and a valve 14 connected sequentially from top to bottom. Tee I3 is connected to the upper injection line 16 of the water tank pipe assembly 300, tee II7 is connected to the drain manifold 17 of the water tank pipe assembly 300, and valve 14 is connected to the lower injection line 15 of the water tank pipe assembly 300. A test pump core injection hole is provided at the upper end of the simulator assembly 100.

[0030] The water tank assembly 300 includes a water tank 19, a water injection pump I 21, a water injection pump II 20, a lower injection line 15, an upper injection line 16, and a drain manifold 17. The water injection pump I 21 injects the liquid in the water tank 19 into the simulator assembly 100 through the lower injection line 15; the water injection pump II 20 injects the liquid in the water tank 19 into the inner pipe string 39 of the simulator assembly 100 through the upper injection line 16; the drain manifold 17 connects the annulus I 26 of the simulator assembly 100 to the water tank 19, and the liquid in the simulator assembly 100 is drained into the water tank 19 through the drain manifold 17.

[0031] Furthermore, the tee I3 is connected to the upper injection pipeline 16 via flange I4; the tee II7 is connected to the drain manifold 17 via flange III8.

[0032] The simulator assembly 100 is vertically and fixedly mounted on one side of the test bench 200, and the connecting plate 18 of the simulator assembly 100 is fixedly connected to the docking plate 23 of the test bench 200. Furthermore, the connecting plate 18 is fixedly mounted on one side of the tee II 7.

[0033] Furthermore, the test bench 200 is equipped with a protective baffle 24, which blocks both sides of the simulator assembly 100 and the lower part of the pedal 25. Furthermore, the protective baffle 24 is composed of three iron plates, one on each side of the test bench 200 and one at the lower part of the pedal, forming a three-sided enclosure of the simulator assembly 100, improving test safety; preferably, the protective baffle 24 is bolted or welded to the test bench 200.

[0034] The ground simulation test device also includes a control system, a pressure transmitter to monitor the injection pressure of water injection pump I 21 and water injection pump II 20; and a flow meter to monitor the real-time flow of the lower injection pipeline 15, the upper injection pipeline 16, and the drain manifold 17.

[0035] The control system is PLC-controlled, and test parameters and data monitoring are set and read through the main control display screen.

[0036] The simulator assembly 100 includes a tee I3, a flange II5, a tee II7, a flange IV8, a simulator pump 101, and a valve 14. The tee I3, flange II5, short section 6, tee II7, flange IV8, transition joint 10, simulator pump 101, and valve 14 are connected sequentially from top to bottom. The test pump core injection hole is located at the upper end of the tee I3. A plug 2 is fixedly installed at the upper end of the tee I3. The plug 2 is used to block the liquid from spraying out from the upper end of the simulator assembly. At the same time, it plays a role in preventing the pump core from directly detaching from the simulator assembly when the concentric tube hydraulic jet pump backwashes and starts the pump core test.

[0037] Furthermore, a lifting ring 1 is fixedly installed at the upper end of the plug 2, which is used to lift the simulator assembly 100 during installation and disassembly.

[0038] See appendix Figure 2 The simulated pump 101 includes an outer pump cylinder 11, an inner pump cylinder 38, and a connector 12. The upper end of the outer pump cylinder 11 is fixedly connected to the transition connector 10.

[0039] The inner pipe string 39 of the simulator assembly 100 includes an oil pipe 22, an inner pump cylinder 38, and a connector 12 connected sequentially from top to bottom. The upper end of the oil pipe 22 is fixedly connected to the inner hole of the flange II 5.

[0040] The connector 12 is disposed in the inner hole of the outer pump cylinder 11, and a radial sealing ring I 13 is installed between the outer pump cylinder 11 and the connector 12.

[0041] The outer circle of the oil pipe 22 and the inner pump cylinder 38 forms an annular space I26 with the short section 6, tee II 7, flange IV 9, transition joint 10 and the inner hole of the outer pump cylinder 11.

[0042] See appendix Figure 3When the pump core 27 is inserted into the simulated pump 101 through the test pump core insertion hole at the upper end of the three-way valve I3, the pump core 27 moves down along the oil pipe 22 and the inner pump barrel 38 until it sits on the plug connector 12. A radial sealing ring III 41 is installed between the pump core housing 29 and the plug connector 12; an annular space II 28 is formed between the pump core housing 29 and the inner pump barrel 38.

[0043] The pump core 27 is equipped with a nozzle 31 and a throat 32. The pump core housing 29 between the nozzle 31 and the throat 32 is provided with a radial through hole Ⅲ 35. A sealing ring Ⅱ 30 is provided above the radial through hole Ⅲ 35 to radially seal the annular space Ⅱ 28.

[0044] The pump core housing 29 and the corresponding inner pump cylinder 38 below the throat tube 32 are provided with radial through holes II 34, which connect the inner cavity of the pump core 27 with the annulus I 26; a radial sealing device 33 is installed on one side of the radial through hole II 34 of the pump core housing 29, which is used to prevent the annulus II 28 from communicating with the radial through hole II 34.

[0045] The lower part of the pump core housing 29 is provided with a radial through hole IV40, which connects the inner cavity of the connector 12 with the annular space II28; a blocking plate 42 is provided in the pump core housing 29 above the radial through hole IV40 and below the radial through hole II34, which serves as the bottom plate of the inner cavity of the pump core housing 29.

[0046] The ground simulation test device for concentric tube hydraulic jet pump of the present invention is used to conduct process tests on concentric tube hydraulic jet pump. In this device, water injection pump II 20 simulates power fluid and injects liquid in water tank 19 into simulator assembly 100 from top to bottom through upper injection pipeline 16. Water injection pump I 21 simulates bottom well fluid and injects liquid in water tank 19 into simulator pump 101 from bottom to top through lower injection pipeline 15.

[0047] When conducting experiments using this invention, first open the plug 2, and insert the pump core 27 into the simulator assembly 100 through the test pump core insertion hole at the upper end of the tee I3. The pump core 27 enters the inner pump cylinder 38 through the tee I3 and the oil pipe 22 and sits on the connector 12. At this time, the outer pump cylinder 11, the inner pump cylinder 38, and the pump core 27 are coaxially arranged. The outer circle of the inner tube string 39 forms an annular space I26 with the short section 6, the tee II7, the flange IV9, the transition connector 10, and the inner hole of the outer pump cylinder 11; the pump core housing 29 forms an annular space II28 with the inner pump cylinder 38; the radial through hole III35 of the pump core housing 29 connects the inner cavity of the pump core 27 with the annular space II28; the radial through hole II34 of the pump core housing 29 connects the inner cavity of the pump core 27 with the annular space I26; the radial through hole IV40 at the lower part of the pump core housing 29 connects the inner cavity of the connector 12 with the annular space II28.

[0048] In the positive circulation test, first open valve 14 and all valves on the lower injection line 15, upper injection line 16, and drain manifold 17; according to the design requirements of the test valve core, simulate the downhole working conditions, and set the injection pressure, temperature, flow rate and other technical parameters of water injection pump I21 on the main control system display screen of the control system; start water injection pump I21 and water injection pump II20.

[0049] Then, the liquid in the water tank 19 is pressurized by the water injection pump II 20 to form the power fluid required by the system, and enters the inner pipe string 39 through the upper injection line 16 and the tee I3; the power fluid flows downward through the radial through hole I 36 of the pump core housing 29 to open the one-way valve 37, and then the power fluid enters the inner cavity of the pump core 27; after the power fluid flows downward through the nozzle 31 in the inner cavity of the pump core 27, it forms a high-speed fluid and forms a low-pressure zone between the nozzle 31 and the throat 32.

[0050] Meanwhile, the high-pressure liquid (simulating the bottom flow pressure of an oil and gas well) after being pressurized by the injection pump I21 enters the simulated pump 101 through the injection line 15 and valve 14, and then enters the low-pressure area between the nozzle 31 and the throat 32 through the inner cavity of the connector 12, the radial through hole IV40, the annulus II28, and the radial through hole III35 in sequence. It mixes with the power fluid ejected from the nozzle 31 to form a mixture. The mixture flows through the throat 32 and reaches the bottom of the pump core cavity. After that, the mixture passes through the radial through hole II34, the annulus I26, and the tee II7 in sequence, and then flows into the water tank 19 through the drain manifold 17, thus completing a complete test process of the suction capacity of the concentric tube hydraulic jet pump.

[0051] During the test, the real-time injection pressure of water injection pump I21 and water injection pump II20 monitored by the pressure transmitter, and the real-time flow rate of the lower injection pipeline 15, upper injection pipeline 16, and drainage manifold 17 monitored by the flow meter can be read on the main control system display screen. By analyzing the test values, it can be determined whether the pump core structure, sealing condition, and the distance and model between the nozzle and throat are reasonable under specific bottom hole flow pressure and production rate requirements.

[0052] The main purpose of the reverse circulation test is to test whether the pump core 27 can be lifted to the wellhead, and to record the pressure, flow rate and other values ​​during the lifting process. The reverse circulation test process is as follows:

[0053] First, interchange the positions of the upper injection line 16 and the drain line 17. That is, connect the upper injection line 16 to flange III8 and the drain line 17 to flange I4. This interchange can be done manually or automatically using a solenoid valve assembly.

[0054] Then, close valve 14; open all valves on the upper injection line 16 and the drain manifold 17; start water pump II 20, the liquid in the water tank 19 is pressurized by water pump II 20 to simulate the power fluid, the power fluid enters the annulus I 26, and flows downward along the annulus I 26 through the radial through hole II 34 into the bottom of the inner cavity of the pump core 29; then, the power fluid flows upward through the throat 32 and nozzle 31 to reach below the check valve 37, pushing the check valve 37 to close, the power fluid can no longer flow upward, thus forming an upward thrust, which pushes the check valve 37 upward to push the pump core 27 upward, and the upward thrust of the power fluid lifts the pump core 27 upward along the inner pump cylinder 38 and oil pipe 22 to the upper part of the simulator assembly 100; finally, remove the pump core 27 from the test pump core release hole at the upper end of the tee I 3.

[0055] The ground simulation test device for concentric tube hydraulic jet pumps of this invention has the characteristics of simple structure, small footprint, low investment, convenient maintenance and easy operation. By simulating the dynamic fluid surface in the well, it provides relevant process test data for the research and development of concentric tube hydraulic jet pumps and promotes the development of concentric tube hydraulic jet pump drainage technology.

[0056] It should be noted that the above embodiments are examples and not limitations of the present invention, and those skilled in the art will be able to design many alternative embodiments without departing from the scope of the claims of this patent.

Claims

1. A ground simulation test device for a concentric tube hydraulic jet pump, characterized in that: The system includes a simulator assembly, a test bench, and a water tank assembly. The simulator assembly includes a tee I, a flange II, a tee II, a flange IV, a simulator pump, and valves. The water tank assembly includes a water tank, a water injection pump I, a water injection pump II, a lower injection line, an upper injection line, and a drain manifold. The simulator assembly consists of three-way valve I, three-way valve II, a simulation pump, and a valve connected sequentially from top to bottom; three-way valve I is connected to the upper injection pipeline, three-way valve II is connected to the drain manifold, and the valve is connected to the lower injection pipeline; the upper end of the simulator assembly is provided with a test pump core injection hole; The simulator assembly consists of tee I, flange II, short section, tee II, flange IV, transition joint, simulator pump, and valve connected sequentially from top to bottom; the test pump core injection hole is located at the upper end of tee I, and a plug is fixedly installed at the upper end of tee I; The upper end of the outer pump cylinder of the simulated pump is fixedly connected to the transition joint; The inner pipe string of the simulator assembly includes an oil pipe, an inner pump cylinder, and a connector connected in sequence from top to bottom, with the upper end of the oil pipe fixedly connected to the inner hole of flange II; The connector is located inside the outer pump cylinder, and a radial sealing ring I is installed between the outer pump cylinder and the connector. The outer circle of the oil pipe and the inner pump barrel, together with the short section, tee II, flange IV, transition joint, and inner hole of the outer pump barrel, form an annular space I. When the pump core is inserted into the simulated pump through the test pump core insertion hole at the upper end of the tee I, the pump core goes down along the oil pipe and the inner pump cylinder until it sits on the plug joint. A radial sealing ring III is installed between the pump core housing and the plug joint; an annular space II is formed between the pump core housing and the inner pump cylinder. The pump core housing between the nozzle and the throat is provided with a radial through hole Ⅲ, and a sealing ring Ⅱ is provided above the radial through hole Ⅲ to seal the annular space Ⅱ. The pump core housing and the corresponding inner pump cylinder below the throat are provided with radial through holes II, which connect the inner cavity of the pump core to the annular space I; a radial sealing device is installed on one side of the radial through hole II of the pump core housing. The lower part of the pump core housing is provided with a radial through hole IV, which allows the inner cavity of the connector to communicate with the annular space II.

2. The ground simulation test device for the concentric tube hydraulic jet pump according to claim 1, characterized in that: The water tank manifold, which is part of the water injection pump I, injects the liquid from the water tank into the simulator assembly through the lower injection line; the water injection pump II injects the liquid from the water tank into the inner pipe string of the simulator assembly through the upper injection line; the drain manifold connects the annulus I of the simulator assembly to the water tank.

3. The ground simulation test device for the concentric tube hydraulic jet pump according to claim 2, characterized in that: The simulator assembly is vertically and fixedly mounted on one side of the test bench, and the connecting plate of the simulator assembly is fixedly connected to the docking plate of the test bench.

4. The ground simulation test device for the concentric tube hydraulic jet pump according to any one of claims 2-3, characterized in that: The ground simulation test device includes a control system, a pressure transmitter to monitor the injection pressure of water injection pump I and water injection pump II, and a flow meter to monitor the instantaneous flow of the lower injection pipeline, the upper injection pipeline, and the drain manifold.

5. The ground simulation test device for the concentric tube hydraulic jet pump according to claim 4, characterized in that: The control system is PLC-controlled, and test parameters and data monitoring are set and read through the main control display screen.

6. The ground simulation test device for the concentric tube hydraulic jet pump according to claim 5, characterized in that: The protective baffles installed on the test bench cover both sides of the simulator assembly and the lower part of the pedal.

7. The ground simulation test device for the concentric tube hydraulic jet pump according to claim 2, characterized in that: The tee I is connected to the upper injection pipeline via flange I; the tee II is connected to the drain manifold via flange III.

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