Wave code communication multistage injection allocator testing device and method

Abstract

The invention discloses a wave code communication multistage injection allocator testing device and method, the device comprises a testing tubular column and a communication testing device, the testing tubular column comprises a water supply mechanism, the water supply mechanism is communicated with an injection allocator through a return tank and a buffer tank, and a pressure pump and a one-way valve are arranged between an outlet of the return tank and an inlet of the buffer tank in the water flow direction; the outlet of the buffer tank is communicated with the inlet of the return tank, a flow adjusting and monitoring mechanism and a pressure adjusting and monitoring mechanism are arranged between the outlet of the buffer tank and the injection allocation device in the water flow direction, the outlet end of the injection allocation device is connected with a plugging mechanism, and the communication test equipment is electrically connected with the adjusting and monitoring mechanism and the pressure adjusting and monitoring mechanism. Compared with existing testing equipment, the testing device has the advantages that the constant-current mode and the constant-voltage mode can be selectively switched, and flow field characteristic simulation of the wave code communication injection allocator in different working states under the actual working condition is met; and meanwhile, the device has a series debugging function of multiple sets of injection allocator, and can simulate the working condition of an underground layered injection allocation pipe column.

Description

Technical Field

[0001] The invention belongs to the technical field of testing equipment, relates to a wave code communication multi-stage dispenser testing device, and also relates to a testing method for the wave code communication multi-stage dispenser testing device. Background Art

[0002] If there is a lack of oil-displacing energy as a supplement during the exploitation of oil wells, the pressure between oil layers will continue to decrease during the oil production process, causing a series of problems, and eventually resulting in a large amount of dead oil remaining underground that cannot be produced. In order to make up for the underground deficit caused by the extraction of crude oil, maintain or increase the pressure of the oil layer, achieve high and stable production of the oil field, and obtain a higher recovery rate, the oil field must be injected with water. At present, in order to achieve precise stratified water injection and improve the efficiency of downhole water injection, oil fields mostly use adjustable injectors with wave code communication. The wave code injector needs to be functionally tested before going down the well to ensure its stability in downhole operation. The existing conventional flow test system can usually only be used to test water injection tools under constant flow or constant pressure, and it is impossible to realize the joint commissioning test of multi-stage tools. It is difficult to meet the communication performance test after the multi-stage wave code communication injector is connected in series, and it is impossible to simulate the actual water injection and communication status downhole. Summary of the invention

[0003] The purpose of the present invention is to provide a wave code communication multi-stage water dispenser testing device, which solves the problem in the prior art that it is unable to simulate the actual water injection and communication status in the well.

[0004] The technical solution adopted by the present invention is a wave code communication multi-stage dispenser test device, including a test column and a communication test device. The test column includes a water supply mechanism, which is connected to the dispenser through a reflux tank and a buffer tank. A pressure pump and a one-way valve are arranged between the reflux tank outlet and the buffer tank inlet along the water flow direction. The buffer tank outlet is connected to the reflux tank inlet. A flow regulating monitoring mechanism and a pressure regulating monitoring mechanism are arranged between the buffer tank outlet and the dispenser along the water flow direction. A sealing mechanism is connected to the outlet end of the dispenser, and the communication test equipment is electrically connected to the regulating monitoring mechanism and the pressure regulating monitoring mechanism.

[0005] The present invention is also characterized in that:

[0006] The flow regulating and monitoring mechanism includes a flow regulating valve and a vortex flowmeter. The flow regulating valve is connected to the buffer tank. The vortex flowmeter is connected to the pressure regulating and monitoring mechanism. The vortex flowmeter is electrically connected to the communication test equipment.

[0007] The pressure regulating monitoring mechanism comprises a first regulating valve and a second regulating valve. The first regulating valve is connected to a vortex flowmeter, the second regulating valve is connected to an injector, and the first regulating valve and the second regulating valve are electrically connected to a communication testing device.

[0008] The water supply mechanism comprises a test water tank, in which a water pump is arranged, and the water pump is connected with a reflux tank.

[0009] A water drawing area is arranged in the test water tank, and a water pump is located in the water drawing area.

[0010] The buffer tank is equipped with a pressure gauge and a safety valve.

[0011] The outlet of the reflux tank is connected to the booster pump through a first ball valve, a first flexible joint, and a reducer, and the booster pump is connected to the one-way valve through a second flexible joint and a second ball valve.

[0012] The first regulating valve is connected to the dispenser via a connecting joint.

[0013] The reflux tank is provided with an overflow pipe.

[0014] Another object of the present invention is to provide a method for testing a wave code communication multi-stage dispenser.

[0015] Another technical solution adopted by the present invention is a wave code communication multi-stage dispenser testing method, which adopts the wave code communication multi-stage dispenser testing device mentioned above, and comprises the following steps:

[0016] Step 1: Turn on the booster pump to increase pressure, turn on the water pump, and adjust the flow rate through the first ball valve and the second ball valve at the same time. The communication test equipment adjusts the first regulating valve to generate a wake-up pressure in the test column that is greater than the current pressure in the pipe by more than 0.5MPa to activate the dispenser;

[0017] Step 2: The communication test equipment adjusts and controls the second regulating valve to reduce the pressure in the test pipe string to a pressure value that is less than the current pressure in the pipe by more than 0.5 MPa, and then closes the valve;

[0018] Step 3: The pressure in the test string is raised to 5 MPa by the pressure pump, and then the second regulating valve is controlled to reduce the pressure in the test string to 4.5 MPa and then closed, thus forming a pressure pulse;

[0019] Step 4: Repeat steps 2-3 multiple times to generate continuous pressure pulses in the test string. The dispenser will turn on or off when it detects the pulse signal. At the same time, the communication test equipment reads the test data of the dispenser in real time, compares the test data with the adjustment data, determines whether there is any abnormality in the working status of the dispenser, and completes the test.

[0020] The beneficial effects of the present invention are as follows: the wave code communication multi-stage injector testing device of the present invention adjusts the pressure and flow rate in the test pipe string through the communication test equipment, and simultaneously monitors the monitoring data of the injector, compares the adjustment data with the monitoring data, determines whether there is any abnormality in the working state of the injector, and avoids the occurrence of problems such as over-injection and under-injection due to the abnormality of the injector; compared with the existing test equipment, the present invention has the characteristics of selective switching between constant current and constant pressure modes, which meets the simulation of flow field characteristics of the wave code communication injector under different working states under actual working conditions; and at the same time has the function of serial debugging of multiple sets of injectors, which can simulate the working conditions of the underground layered injection pipe string. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the wave code communication multi-stage dispenser testing device of the present invention.

[0022] In the figure, 1. water pump, 2. reflux tank, 3. first ball valve, 4. first flexible joint, 5. reducer, 6. booster pump, 7. second flexible joint, 8. second ball valve, 9. check valve, 10. buffer tank, 11. pressure gauge, 12. safety valve, 13. flow regulating valve, 14. vortex flowmeter, 15. first regulating valve, 16. connecting joint, 17. second regulating valve, 18. water drawing area, 19. test water tank, 20. overflow pipe, 21. dispenser, 22. plugging mechanism. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] The wave code communication multi-stage dispenser test device includes a test column and a communication test device. The test column includes a water supply mechanism, which is connected to the dispenser 21 through the reflux tank 2 and the buffer tank 10. A booster pump 6 and a one-way valve 9 are arranged along the water flow direction between the outlet of the reflux tank 2 and the inlet of the buffer tank 10. The outlet of the buffer tank 10 is connected to the inlet of the reflux tank 2. A flow regulating monitoring mechanism and a pressure regulating monitoring mechanism are arranged between the outlet of the buffer tank 10 and the dispenser 21 along the water flow direction. A plugging mechanism 22 is connected to the outlet of the dispenser 21. The communication test device is electrically connected to the regulating monitoring mechanism and the pressure regulating monitoring mechanism. The dispenser 21 includes a plurality of dispensers, and the plurality of dispensers 21 are connected in series. The plugging mechanism 22 is connected to the outlet of the dispenser 21 at the end. The communication test equipment includes a test computer and test software. The test software can detect the flow and pressure parameters in the test pipe string and multiple sets of injectors in real time, conduct real-time comparative analysis of the two sets of data, and adjust the data of the injectors with detection errors to ensure the stability of the injectors in the well and improve the water injection efficiency.

[0026] Example 2

[0027] The wave code communication multi-stage dispenser test device includes a test pipe column and a communication test device. The test pipe column includes a water supply mechanism, which is connected to the dispenser 21 through the reflux tank 2 and the buffer tank 10. A booster pump 6 and a one-way valve 9 are arranged between the outlet of the reflux tank 2 and the inlet of the buffer tank 10 along the water flow direction. The one-way valve 9 can prevent the water in the test pipe column from flowing back into the reflux tank 2; the outlet structural steel pipe flange of the buffer tank 10 is connected to the inlet of the reflux tank 2, and a flow regulating monitoring mechanism and a pressure regulating monitoring mechanism are arranged between the outlet of the buffer tank 10 and the dispenser 21 along the water flow direction. The outlet end of the dispenser 21 is connected to a blocking mechanism 22 to block the entire test pipe column, and the communication test equipment is electrically connected to the regulating monitoring mechanism and the pressure regulating monitoring mechanism. The present invention can connect multiple sets of dispensers 21 according to the water injection process, and test multiple sets of dispensers at the same time. In this embodiment, the booster pump 6 is a multi-stage pump.

[0028] The flow regulating monitoring mechanism includes a flow regulating valve 13 and a vortex flowmeter 14. The flow regulating valve 13 is connected to the vortex flowmeter 14 through a structural steel pipe flange. The flow regulating valve 13 can accurately control the flow in the test string. The flow regulating valve 13 is connected to the buffer tank 10, the vortex flowmeter 14 is connected to the pressure regulating monitoring mechanism, the vortex flowmeter 14 is electrically connected to the communication test equipment, and the vortex flowmeter 14 can monitor the flow in the test string in real time and transmit data to the communication test equipment. The pressure regulating monitoring mechanism includes a first regulating valve 15 and a second regulating valve 17. The first regulating valve 15 is connected to the vortex flowmeter 14, and the second regulating valve 17 is connected to the dispenser 21. The first regulating valve 15 and the second regulating valve 17 are electrically connected to the communication test equipment. The first regulating valve 15 can monitor the pressure in the test string in real time and adjust the pressure to form a pressure wave signal. The first regulating valve 15 is connected to the dispenser 21 through a connecting joint 16. The second regulating valve 17 plays a role in assisting in regulating the pressure. The first regulating valve 15 has a specification of DN50, and the second regulating valve 17 has a specification of DN15.

[0029] The water supply mechanism includes a test water tank 19, in which a water pump 1 is arranged, and the water pump 1 is connected to a reflux tank 2. A water drawing area 18 is arranged in the test water tank 19, and the water pump 1 is located in the water drawing area 18. Before the test, water needs to be filled into the test water tank 19, and water is filled into the reflux tank 2 through the water pump 1. In this embodiment, the water pump 1 is a variable frequency submersible pump.

[0030] The buffer tank 10 is provided with a pressure gauge 11 and a safety valve 12. The buffer tank 10 plays a role in stabilizing the water flow in the water injection column. The pressure gauge provided on the buffer tank 10 can monitor the pressure in the water injection column in real time, and the safety valve 12 is provided to release the pressure when a certain pressure is reached to protect the pressure pump 6 and other pressure components.

[0031] The outlet of the reflux tank 2 is connected to the booster pump 6 via the first ball valve 3, the first flexible joint 4 and the reducer 5, and the booster pump 6 is connected to the check valve 9 via the second flexible joint 7 and the second ball valve 8. The reflux tank 2 is provided with an overflow pipe 20.

[0032] Example 3

[0033] According to the technical indicators of the dispenser 21, the test device indicators are determined as shown in Table 1:

[0034] Table 1

[0035]

[0036] Indicator calculation

[0037] According to the maximum opening pressure of the injector 21 of 5MPa, the overall pressure of the designed test string shall not be less than 10MPa, the safety factor of this system is 2, and the pressure of the standard parts of the string (first ball valve 3, second ball valve 8, first regulating valve 15, second regulating valve 17, pressure gauge 11, safety valve 12, one-way valve 9, buffer tank 10, connecting flange) shall not be less than 10MPa.

[0038] The material of the pressure pipe is 20G according to the standard GB / T 5310-2017. The material properties are as follows; Pipeline thickness calculation:

[0039] P=2SR / D

[0040] Wherein, P is the test pressure in MPa. When P<7MPa, it is rounded to the nearest 0.5MPa. When P≥7MPa, it is rounded to the nearest 1MPa. S is the wall thickness of the steel pipe in mm. D is the outer diameter of the steel pipe in mm. R is the allowable stress, which is calculated according to 80% of the yield strength specified in Table 2.

[0041] Table 2G20 material properties

[0042]

[0043] According to the maximum pressure in the pipeline P = 10MPa, the outer diameter of the steel pipe D = 50mm, the allowable pressure R = 245×0.8 = 196MPa, S = 1.3mm, so DN50 steel pipe is selected, the wall thickness is 2mm, and the inner diameter of the steel pipe r = 48mm.

[0044] According to the flow measurement range of the dispenser 21, the flow measurement range is 5-50m 3 / d, determine the displacement of multi-stage pump 6 and variable frequency submersible pump is not less than 100m 3 / d.

[0045] Example 4

[0046] The method for testing a multi-stage injector of wave code communication comprises the following steps:

[0047] Step 1, start the booster pump 6 to increase pressure, turn on the water pump 1 to start water injection, and adjust the flow rate through the first ball valve 3 and the second ball valve 8. The communication test equipment adjusts the first regulating valve 15 to generate a wake-up pressure in the test column that is greater than the current pressure in the pipe by more than 0.5MPa to activate the dispenser 21;

[0048] Step 2: The communication test equipment adjusts and controls the second regulating valve 17 to reduce the pressure in the test pipe string to a pressure value that is less than the current pressure in the pipe by more than 0.5 MPa, and then closes the valve;

[0049] Step 3, the pressure in the test string is raised to 5 MPa by the pressure pump 6, and then the second regulating valve 17 is controlled to reduce the pressure in the test string to 4.5 MPa and then closed, thus forming a pressure pulse;

[0050] Step 4, repeat steps 2-3 multiple times to generate continuous pressure pulses in the test string. The dispenser 21 will turn on or off when it detects the pulse signal. At the same time, the communication test equipment reads the detection data of the dispenser 21 in real time, compares the detection data with the adjustment data, determines whether there is any abnormality in the working status of the dispenser, and completes the test.

Claims

1. Wave code communication multi-stage dispenser test device, characterized in that: The invention comprises a test column and a communication test device, wherein the test column comprises a water supply mechanism, wherein the water supply mechanism is connected to a dispenser (21) through a reflux tank (2) and a buffer tank (10), a pressure pump (6) and a one-way valve (9) are arranged between the outlet of the reflux tank (2) and the inlet of the buffer tank (10) along the water flow direction, the outlet of the buffer tank (10) is connected to the inlet of the reflux tank (2), a flow regulating monitoring mechanism and a pressure regulating monitoring mechanism are arranged between the outlet of the buffer tank (10) and the dispenser (21) along the water flow direction, the outlet end of the dispenser (21) is connected to a blocking mechanism (22), and the communication test device is electrically connected to the regulating monitoring mechanism and the pressure regulating monitoring mechanism.

2. The wave code communication multi-stage dispenser test device according to claim 1 is characterized in that: The flow regulating and monitoring mechanism comprises a flow regulating valve (13) and a vortex flowmeter (14); the flow regulating valve (13) is connected to the buffer tank (10); the vortex flowmeter (14) is connected to the pressure regulating and monitoring mechanism; and the vortex flowmeter (14) is electrically connected to the communication test equipment.

3. The wave code communication multi-stage dispenser test device according to claim 2 is characterized in that: The pressure regulating and monitoring mechanism comprises a first regulating valve (15) and a second regulating valve (17); the first regulating valve (15) is connected to a vortex flowmeter (14); the second regulating valve (17) is connected to an injector (21); and the first regulating valve (15) and the second regulating valve (17) are electrically connected to a communication test device.

4. The wave code communication multi-stage dispenser test device according to claim 1 is characterized in that: The water supply mechanism comprises a test water tank (19), a water pump (1) is arranged in the test water tank (19), and the water pump (1) is connected to a reflux tank (2).

5. The wave code communication multi-stage dispenser test device according to claim 4 is characterized in that: A water drawing area (18) is provided in the test water tank (19), and the water pump (1) is located in the water drawing area (18).

6. The wave code communication multi-stage dispenser test device according to claim 1 is characterized in that: The buffer tank (10) is provided with a pressure gauge (11) and a safety valve (12).

7. The wave code communication multi-stage dispenser test device according to claim 1 is characterized in that: The outlet of the reflux tank (2) is connected to the booster pump (6) via a first ball valve (3), a first flexible joint (4), and a reducer (5), and the booster pump (6) is connected to the one-way valve (9) via a second flexible joint (7) and a second ball valve (8).

8. The wave code communication multi-stage dispenser test device according to claim 3 is characterized in that: The first regulating valve (15) is connected to the dispenser (21) via a connecting joint (16).

9. The wave code communication multi-stage dispenser test device according to claim 1 is characterized in that: The reflux tank (2) is provided with an overflow pipe (20).

10. The wave code communication multi-stage dispenser test method is characterized in that: The wave code communication multi-stage dispenser testing device according to claim 3 comprises the following steps: Step 1, start the booster pump (6) to increase pressure, turn on the water pump (1), and adjust the flow rate through the first ball valve (3) and the second ball valve (8). The communication test equipment adjusts the first regulating valve (15) to generate a wake-up pressure in the test pipe column with a pressure difference greater than the current pressure in the pipe by more than 0.5 MPa to activate the dispenser (21); Step 2, the communication test equipment regulates and controls the second regulating valve (17), reduces the pressure in the test pipe string to a pressure value that is less than the current pressure in the pipe by more than 0.5 MPa, and then closes the valve; Step 3, the pressure in the test column is raised to 5 MPa by the pressure pump (6), and the second regulating valve (17) is controlled to reduce the pressure in the test column to 4.5 MPa and then closed, thereby forming a pressure pulse; Step 4, repeat steps 2-3 multiple times to generate continuous pressure pulses in the test string. The dispenser (21) will turn on or off when it detects the pulse signal. At the same time, the communication test equipment reads the detection data of the dispenser (21) in real time, compares the detection data with the adjustment data, determines whether there is any abnormality in the working state of the dispenser, and completes the test.

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