Wavecode communication multi-stage injector test device and method

Abstract

The present invention discloses a device and method for testing a wave code communication multi-stage dispenser, comprising a test string and communication test equipment. The test string 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 provided 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 and monitoring mechanism and a pressure regulating and monitoring mechanism are provided between the buffer tank outlet and the dispenser along the water flow direction. A blocking mechanism is connected to the dispenser outlet end. The communication test equipment is electrically connected to the regulating and monitoring mechanism and the pressure regulating and monitoring mechanism. Compared with existing test equipment, the device has the characteristic of selectively switching between constant current and constant pressure modes, which satisfies the simulation of flow field characteristics of wave code communication dispensers under different working conditions under actual working conditions. It also has the function of serial debugging of multiple dispensers, which can simulate the working conditions of underground layered injection strings.

Description

Technical Field

[0001] The present 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 of the wave code communication multi-stage dispenser testing device. Background Art

[0002] If there is a lack of oil displacement energy as a supplement during the production process of an oil well, the pressure between the oil layers will continue to decrease during the production process, causing a series of problems, and ultimately 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 production 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 it is lowered into the well to ensure its stability when it is lowered into the well. Existing conventional flow testing systems can usually only be used to test water injection tools under constant flow or constant pressure, and cannot realize the joint debugging test of multi-stage tools. It is difficult to meet the communication performance test after the multi-stage wave code communication injectors are 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 injector testing device, which solves the problem in the prior art that it is unable to simulate the actual water injection and communication status of the well.

[0004] The technical solution adopted by the present invention is a wave code communication multi-stage dispenser test device, which includes a test string and a communication test device. The test string 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. The dispenser outlet end is connected to a sealing mechanism, 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 regulation monitoring mechanism includes 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 test device.

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

[0009] A water drawing area is provided 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 pressure pump through a first ball valve, a first flexible joint, and a reducing joint, and the pressure 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 injector.

[0015] Another technical solution adopted by the present invention is a method for testing a wave code communication multi-stage dispenser, which adopts the above-mentioned wave code communication multi-stage dispenser testing device and includes 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 and second ball valves. The communication test equipment adjusts the first regulating valve to generate a wake-up pressure in the test string that is greater than the current pressure in the pipe by more than 0.5 MPa 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 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: Use the pressure pump to increase the pressure in the test string to 5 MPa, then control the second regulating valve to reduce the pressure in the test string to 4.5 MPa and then close it, 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, and determines whether there is any abnormality in the working status of the dispenser. The test is completed.

[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 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, and determines whether there is any abnormality in the working state of the injector, thereby avoiding the occurrence of problems such as over-injection and under-injection due to 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; at the same time, it has the function of serial debugging of multiple sets of injectors, which can simulate the working conditions of underground layered injection pipe strings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural 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. one-way 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. injection device, 22. blocking mechanism. DETAILED DESCRIPTION

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

[0024] Example 1

[0025] A wave code communication multi-stage dispenser test device includes a test string and communication test equipment. The test string includes a water supply mechanism, which is connected to the dispenser 21 through a reflux tank 2 and a buffer tank 10. A pressure pump 6 and a one-way valve 9 are provided 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 and monitoring mechanism and a pressure regulating and monitoring mechanism are provided along the water flow direction between the outlet of the buffer tank 10 and the dispenser 21. A blocking mechanism 22 is connected to the outlet of the dispenser 21. The communication test equipment is electrically connected to the regulating and monitoring mechanism and the pressure regulating and monitoring mechanism. Multiple dispensers 21 are connected in series, and the blocking mechanism 22 is connected to the outlet of the last dispenser 21. The communication test equipment includes a test computer and test software. The test software can detect the flow and pressure parameters in the test 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] A wave code communication multi-stage dispenser test device includes a test string and communication test equipment. The test string includes a water supply mechanism, which is connected to the dispenser 21 through a reflux tank 2 and a buffer tank 10. A pressure pump 6 and a one-way valve 9 are provided between the outlet of the reflux tank 2 and the inlet of the buffer tank 10 along the direction of water flow. The one-way valve 9 can prevent water in the test string 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. A flow regulating and monitoring mechanism and a pressure regulating and monitoring mechanism are provided between the outlet of the buffer tank 10 and the dispenser 21 along the direction of water flow. A blocking mechanism 22 is connected to the outlet end of the dispenser 21 to block the entire test string. The communication test equipment is electrically connected to the regulating and monitoring mechanism and the pressure regulating and monitoring mechanism. The present invention can connect multiple sets of dispensers 21 according to the water injection process and test multiple sets of dispensers simultaneously. In this embodiment, the pressure pump 6 is a multi-stage pump.

[0028] The flow control and monitoring mechanism includes a flow control valve 13 and a vortex flowmeter 14. The flow control valve 13 is connected to the vortex flowmeter 14 via a structural steel pipe flange. The flow control valve 13 precisely controls the flow rate within the test string. The flow control valve 13 is connected to the buffer tank 10, while the vortex flowmeter 14 is connected to the pressure control and monitoring mechanism. The vortex flowmeter 14 is electrically connected to the communication test equipment, enabling real-time monitoring of the flow rate within the test string and transmitting data to the communication test equipment. The pressure control and monitoring mechanism includes a first control valve 15 and a second control valve 17. The first control valve 15 is connected to the vortex flowmeter 14, while the second control valve 17 is connected to the injection dispenser 21. Both valves are electrically connected to the communication test equipment. The first control valve 15 monitors the pressure within the test string in real time and regulates it, generating a pressure wave signal. The first control valve 15 and the injection dispenser 21 are connected via a connector 16. The second control valve 17 assists in regulating 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, which houses a water pump 1 connected to a reflux tank 2. A water draw area 18 is located within the test water tank 19, with the water pump 1 positioned within that area. Before testing, the test water tank 19 must be filled with water, which is then fed into the reflux tank 2 via the water pump 1. In this embodiment, the water pump 1 is a variable-frequency submersible pump.

[0030] The buffer tank 10 is equipped with a pressure gauge 11 and a safety valve 12. The buffer tank 10 plays the role of stabilizing the water flow in the water injection string. The pressure gauge installed on the buffer tank 10 can monitor the pressure in the water injection string in real time. The safety valve 12 is provided to relieve pressure when a certain pressure is reached to protect the pressure components such as the pressure pump 6.

[0031] The outlet of the reflux tank 2 is connected to the pressure pump 6 via a first ball valve 3, a first flexible joint 4, and a reducer 5. The pressure pump 6 is connected to the one-way valve 9 via a second flexible joint 7 and a 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 pressure pipe is made of 20G material according to the standard GB / T 5310-2017. The material properties are as follows; pipe thickness calculation:

[0039] P=2SR / D

[0040] Wherein, P is the test pressure in MPa. When P < 7 MPa, it is rounded to the nearest 0.5 MPa. When P ≥ 7 MPa, it is rounded to the nearest 1 MPa. 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 as 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 with a wall thickness of 2mm and an inner diameter of the steel pipe r = 48mm.

[0044] According to the flow measurement range of the dispenser 21, the flow rate is 5-50m 3 / d, make sure 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 a wave code communication comprises the following steps:

[0047] Step 1: Turn on the booster pump 6 to increase pressure, turn on the water pump 1 to start injecting water, 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 string that is greater than the current pressure in the pipe by more than 0.5 MPa, activating the dispenser 21;

[0048] Step 2: The communication test equipment regulates and controls the second regulating valve 17 to reduce the pressure in the test 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 the second regulating valve 17 is controlled to reduce the pressure in the test string to 4.5 MPa and then closed, thereby 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. The test method of multi-stage injector of wave code communication is characterized in that: A wave code communication multi-stage dispenser test device is used, the device includes a test string and a communication test device, the test string includes a water supply mechanism, the water supply mechanism is connected to the pressure-activated dispenser (21) through a reflux tank (2) and a buffer tank (10), a pressure pump (6) and a one-way valve (9) are provided between the reflux tank (2) outlet and the buffer tank (10) inlet along the water flow direction, the buffer tank (10) outlet is connected to the reflux tank (2) inlet, a flow regulating monitoring mechanism and a pressure regulating monitoring mechanism are provided between the buffer tank (10) outlet and the pressure-activated dispenser (21) along the water flow direction, the outlet end of the pressure-activated 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; The flow regulating and monitoring mechanism comprises a flow regulating valve (13) and a vortex flowmeter (14), wherein the flow regulating valve (13) is in communication with the buffer tank (10), the vortex flowmeter (14) is in communication with the pressure regulating and monitoring mechanism, and the vortex flowmeter (14) is electrically connected to the communication test equipment; The pressure regulating and monitoring mechanism comprises a first regulating valve (15) and a second regulating valve (17), wherein the first regulating valve (15) is in communication with a vortex flowmeter (14), the second regulating valve (17) is in communication with a pressure-activated dispenser (21), and the first regulating valve (15) and the second regulating valve (17) are electrically connected to a communication test device; The water supply mechanism comprises a test water tank (19), a water pump (1) is provided in the test water tank (19), and the water pump (1) is connected to the reflux tank (2); The outlet of the reflux tank (2) is connected to the pressure pump (6) via a first ball valve (3), a first flexible joint (4), and a reducer (5); the pressure pump (6) is connected to the one-way valve (9) via a second flexible joint (7) and a second ball valve (8); The test method includes the following steps: Step 1: Turn on the pressure 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 pressure difference in the test string that is greater than the current pressure in the pipe by 0.5 MPa to wake up the pressure activation dispenser (21); Step 2: The communication test equipment regulates 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; Step 3: The pressure in the test string 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 string 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 pressure-activated 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 pressure-activated 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.

2. The wave code communication multi-stage injector testing method according to claim 1 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).

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

4. The wave code communication multi-stage dispenser testing method according to claim 1 is characterized in that: The first regulating valve (15) is connected to the pressure-activated dispenser (21) via a connecting joint (16).

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

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