Large-drift-diameter balance pressure type electromagnetic intelligent separate injection instrument

Abstract

The invention relates to a large-drift-diameter balance pressure type electromagnetic intelligent separate injection instrument which comprises an upper ring sleeve assembly, a lower ring sleeve assembly and a lower connector, the lower ring sleeve assembly comprises a lower center pipe and a lower pile casing of a ring sleeve, the periphery of the lower center pipe and the inner periphery of the lower pile casing form a lower annular gap, one end of the lower annular gap is communicated with the upper ring sleeve assembly, and the other end of the lower annular gap is communicated with the lower connector. The other end of the lower annular gap is connected with a lower connector, an electromagnetic flow assembly is arranged on one side in the lower annular gap, the inner circumference of one end of the electromagnetic flow assembly is communicated with the lower center pipe through the lower connector, a balance pressure hole is axially formed in the lower connector, and a balance pressure piston is slidably nested in the balance pressure hole. The balance pressure hole located in the first end of the balance pressure piston is communicated with the lower annular gap, the balance pressure hole located in the second end of the balance pressure piston is communicated with the lower center pipe, and when the pressure in the lower center pipe rises and falls, the balance pressure piston is used for transmitting pressure along the balance pressure hole so as to balance the pressure of the inner periphery and the outer periphery of the electromagnetic flow assembly, and non-pressure-difference work is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of intelligent injection in oil fields, and in particular relates to a large-diameter balanced pressure electromagnetic intelligent injection instrument. Background Art

[0002] When oil fields are stratified for water injection, float flowmeters or turbine flowmeters are often used to measure the stratified flow rate. Both flowmeters have moving parts. To prevent sediment from clogging the moving parts and causing them to get stuck or damaged, high water quality requirements are imposed. To avoid clogging, electromagnetic dispensers are introduced. Electromagnetic dispensers measure the volume flow of conductive fluids through an internal electromagnetic flowmeter.

[0003] The electromagnetic flowmeter is composed of electromagnetic coils, electrodes, linings and shells. The shell provides physical protection and support for internal components, and also plays a role in shielding external electromagnetic interference. The lining provides a measurement channel from fluid erosion and chemical corrosion, and has insulating properties to ensure uniform distribution of the magnetic field. Therefore, the electromagnetic flowmeter needs sufficient pressure resistance to be used in high-pressure environments. The existing linings are made of materials such as ceramics or polytetrafluoroethylene, which are not suitable for high-pressure downhole spaces, let alone smaller-sized laminar flow channel measurements. Therefore, they cannot be applied to flow measurement in high-pressure downhole environments. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a large-diameter balanced pressure electromagnetic intelligent dispenser, in which an electromagnetic flow component is connected in series in a balanced pressure hole inside the dispenser, and a balanced pressure piston is nested in the balanced pressure hole. The pressure is transmitted along the balanced pressure hole by the balanced pressure piston to balance the pressure inside and outside the electromagnetic flow component, thereby avoiding the problem that the electromagnetic flow component is easily damaged due to high pressure.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A large-diameter balanced pressure electromagnetic intelligent dispensing instrument comprises an upper ring sleeve assembly, a lower ring sleeve assembly and a lower joint, the lower ring sleeve assembly comprises a lower center tube and a lower casing of inner and outer gap ring sleeves, the outer periphery of the lower center tube and the inner periphery of the lower casing form a lower annular gap, one end of the lower annular gap is connected to the upper ring sleeve assembly, and the other end of the lower annular gap is connected to the lower joint, an electromagnetic flow component is arranged on one side of the lower annular gap, the inner periphery of one end of the electromagnetic flow component is communicated with the lower center tube through the lower joint, a balanced pressure hole is axially arranged on the lower joint, a balanced pressure piston is slidably nested in the balanced pressure hole, the balanced pressure hole at the first end of the balanced pressure piston is connected to the lower annular gap, the balanced pressure hole at the second end of the balanced pressure piston is connected to the lower center tube, when the pressure in the lower center tube rises or falls, the balanced pressure piston transmits pressure along the balanced pressure hole to balance the pressure inside and outside the electromagnetic flow component.

[0006] Furthermore, the lower annular gap is filled with insulating liquid, the first end of the balancing pressure piston is in contact with the insulating liquid, and the balancing pressure piston moves to squeeze the insulating liquid to transmit pressure.

[0007] Furthermore, a blocking tube for stopping the balancing pressure piston is embedded in the inner periphery of one end of the balancing pressure hole.

[0008] Furthermore, it also includes a middle joint, through which the upper ring sleeve assembly is connected and penetrated with the lower ring sleeve assembly, and one end of the lower annular gap is nested in the middle joint.

[0009] Furthermore, a water outlet communicating with the inner circumference of the electromagnetic flow component is provided on the radial outer circumference of the middle joint.

[0010] Furthermore, the upper ring sleeve assembly includes an upper center tube and an upper casing with inner and outer gap ring sleeves, the outer periphery of the upper center tube and the inner periphery of the upper casing form an upper annular gap, the upper annular gap is connected to the middle joint, and the upper center tube penetrates the lower center tube through the middle joint.

[0011] Furthermore, an electric valve core assembly, an internal pressure measuring assembly and an external pressure measuring assembly located in the upper annular gap are embedded in the upper end portion of the middle joint; one end of the electric valve core assembly is connected to the water outlet to control the opening of the water outlet.

[0012] Furthermore, the electromagnetic flow component includes a base, a coil and an electrode. The base is provided with a liquid hole in the axial direction, a pair of the coils are arranged on two opposite sides of the outer periphery of the base, and a pair of the electrodes are arranged on the other two opposite sides of the outer periphery of the base.

[0013] Furthermore, the internal pressure measurement component and the external pressure measurement component both include a pressure sensor, a temperature sensor and a collection circuit board, and the pressure sensor and the temperature sensor are both electrically connected to the collection circuit board.

[0014] Furthermore, the electric valve core assembly includes a motor, a screw nut mechanism and a valve core, and the motor is connected to the valve core through the screw nut mechanism, and is used to drive the screw nut mechanism to drive the valve core to telescope and move to adjust the opening of the water outlet.

[0015] The present invention adopts the above technical solution, which has the following advantages and effects: The present invention provides a large-diameter balanced pressure electromagnetic intelligent dispenser, in which a balanced pressure hole is arranged, one end of the balanced pressure hole is connected in series with an electromagnetic flow component, and a balanced pressure piston is embedded in the inner periphery of the other end. The pressure is transmitted by the balanced pressure piston to automatically adjust the pressure difference between the inner and outer peripheries of the electromagnetic flow component, so that the pressure inside and outside the electromagnetic flow component is balanced, achieving pressure difference-free operation, thereby improving its pressure bearing capacity and effectively extending the service life of the electromagnetic flow component. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view schematic diagram of a large-diameter balanced pressure electromagnetic intelligent dispensing instrument of the present invention.

[0017] Figure 2 for Figure 1 AA cross-section diagram.

[0018] Figure 3 for Figure 2 BB cross-section diagram.

[0019] Figure 4 for Figure 1 Enlarged cross-sectional view of the CC section.

[0020] Figure 5 It is a schematic diagram of the structure of the electromagnetic flow component of the present invention.

[0021] The figures are marked as follows: 1-upper joint, 2-upper casing, 3-upper center tube, 4-electric valve core assembly, 5-middle joint, 6-lower center tube, 7-lower casing, 8-electromagnetic flow assembly, 9-lower joint, 10-internal pressure measurement assembly, 11-external pressure measurement assembly, 12-lower annular gap, 13-cable connector, 14-water outlet, 15-balance pressure hole, 16-balance pressure piston, 17-blocking pipe, 801-base, 802-coil, 803-electrode. DETAILED DESCRIPTION

[0022] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings so that the purpose, features and advantages of the present invention can be more clearly understood. It should be understood that the embodiments shown in the accompanying drawings are not intended to limit the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solution of the present invention.

[0023] like Figure 1-Figure 4As shown. A large-diameter balanced pressure electromagnetic intelligent dispensing instrument of the present invention comprises an upper ring sleeve assembly, a middle joint 5, a lower ring sleeve assembly and a lower joint 9, wherein the upper ring sleeve assembly is connected and connected with the lower ring sleeve assembly through the middle joint 5. The lower ring sleeve assembly comprises a lower center pipe 6 and a lower casing 7 of inner and outer gap rings, wherein the outer periphery of the lower center pipe 6 and the inner periphery of the lower casing 7 form a lower annular gap 12, wherein one end of the lower annular gap 12 is nested in one end of the middle joint 5 and connected with the upper ring sleeve assembly, and the other end of the lower annular gap 12 is connected to the lower joint 9, and the lower joint 9 is connected with the lower center pipe 6. An electromagnetic flow assembly 8 is arranged on one side of the lower annular gap 12, and a water outlet 14 connected with one end of the electromagnetic flow assembly 8 is arranged on the radial outer periphery of the middle joint 5, and the other end of the electromagnetic flow assembly 8 is connected with the lower center pipe 6 through the lower joint 9. A balancing pressure hole 15 is provided in the axial direction of the lower joint 9, and a balancing pressure piston 16 is slidably nested in the balancing pressure hole 15. The balancing pressure hole 15 at the first end of the balancing pressure piston 16 is connected to the lower annular gap 12, and the balancing pressure hole 15 at the second end of the balancing pressure piston 16 is connected to the lower center tube 6. The electromagnetic flow assembly 8 is used to separate the pressure of the lower center tube 6 and the pressure of the lower annular gap 12. When the pressure in the lower center tube 6 rises and falls, the balancing pressure piston 16 moves along the balancing pressure hole 15 to transmit pressure to balance the pressure inside and outside the electromagnetic flow assembly 8. The pressure transmitted to the lower annular gap 12 by the balancing pressure piston 16 rises and falls with the pressure rise and fall in the lower center tube 6.

[0024] Specifically, the upper end of the upper ring sleeve assembly is connected to the upper joint 1, the center of the upper joint 1 is provided with an upper through hole, and the center of the lower joint 9 is provided with a lower through hole. The upper through hole is connected through the upper ring sleeve assembly, the middle joint 5, the lower center tube 6 and the lower through hole to form a central channel. The electromagnetic flow component 8 is axially located in the lower annular gap 12, one end of the electromagnetic flow component 8 is embedded in the lower end part of the middle joint 5 and connected with the water outlet 14, and the other end of the electromagnetic flow component 8 is embedded in the upper end part of the lower joint 9.

[0025] After the water flows through the middle joint 5, the lower center pipe 6 and the lower joint 9, part of the water flows into the next layer, and the other part flows through the electromagnetic flow assembly 8 and is injected into the formation through the water outlet 14. When the water flows through the electromagnetic flow assembly 8, the inner periphery of the electromagnetic flow assembly 8 is connected to the lower center pipe 6, and the outer periphery of the electromagnetic flow assembly 8 is connected to the lower annular gap 12. When the pressure in the lower center pipe 6 increases, the balance pressure piston 16 transmits pressure toward the side of the lower annular gap 12 to increase the pressure in the lower annular gap 12. At this time, the outer peripheral pressure of the electromagnetic flow assembly 8 increases accordingly. When the pressure in the lower center pipe 6 decreases, the balance pressure piston 16 transmits pressure in the reverse direction to reduce the pressure in the lower annular gap 12. At this time, the outer peripheral pressure of the electromagnetic flow assembly 8 decreases accordingly, so as to achieve a balance between the inner and outer peripheral pressures of the electromagnetic flow assembly 8 and realize work without pressure difference.

[0026] Furthermore, in order to prevent the balancing pressure piston 16 from moving out of the balancing pressure hole 15, a blocking tube 17 for stopping the balancing pressure piston 16 is embedded in the inner periphery of one end of the balancing pressure hole 15. Both ends of the blocking tube 17 are axially connected, and the outer periphery is sealed and nested with the inner periphery of the balancing pressure hole 15.

[0027] Furthermore, the lower annular gap 12 is filled with insulating liquid, and the first end of the balance pressure piston 16 is in contact with the insulating liquid. The balance pressure piston 16 moves to squeeze the insulating liquid to transmit pressure.

[0028] Specifically, the insulating liquid is simultaneously filled into the balance pressure hole 15 and contacts one end of the balance pressure piston 16. When the pressure in the lower center pipe 6 increases, the balance pressure piston 16 is pushed to squeeze the insulating liquid and transmit the pressure, so that the pressure in the lower annular gap 12 increases. When the pressure in the lower center pipe 6 decreases, the insulating liquid squeezes the balance pressure piston 16 to move in the opposite direction to transmit the pressure, so that the pressure in the lower annular gap 12 decreases. Since the insulating liquid fills the entire lower annular gap 12, according to the incompressibility of the insulating liquid, the volume of the enclosed insulating liquid does not change with the change of pressure. Therefore, the distance from the balance pressure piston 16 to the plugging pipe 17 (i.e., the movable distance of the balance pressure piston) can be calculated by the expansion coefficient of the insulating liquid, the volume of the lower annular gap 12 and other parameters, thereby designing the pressure resistance and temperature resistance of the electromagnetic flow assembly 8, so that the electromagnetic flow assembly 8 can be applied to various temperature and pressure well conditions.

[0029] Furthermore, the upper ring sleeve assembly includes an upper center pipe 3 and an upper casing 2 with inner and outer gap ring sleeves. The outer periphery of the upper center pipe 3 and the inner periphery of the upper casing 2 form an upper annular gap. The upper annular gap is connected to the other end of the middle joint 5. The upper center pipe 3 passes through the lower center pipe 6 through the middle joint 5.

[0030] Specifically, a central through hole is provided at the center of the central joint 5, the upper end of the central joint 5 is embedded in the lower end of the upper annular gap, the upper through hole is connected with the upper center tube 3, and the upper center tube 3 is connected with the lower center tube 6 through the central through hole.

[0031] Furthermore, the upper end of the middle joint 5 is embedded with an electric valve core assembly 4, an internal pressure measuring assembly 10 and an external pressure measuring assembly 11 located in the upper annular gap, and one end of the electric valve core assembly 4 is connected to the water outlet 14 for controlling the opening of the water outlet 14.

[0032] Specifically, the electric valve core assembly 4, the internal pressure measuring assembly 10 and the external pressure measuring assembly 11 are axially spaced apart in the upper annular gap, the lower end of the electric valve core assembly 4 is embedded in the upper end of the middle joint 5 and spaced apart from the electromagnetic flow assembly 8, and when water flows out of the water outlet 14 through the electromagnetic flow assembly 8, the lower end of the electric valve core assembly 4 is used to telescopically move to control the opening of the water outlet 14. The internal pressure measuring assembly 10 and the external pressure measuring assembly 11 are used to measure the internal and external pressures and temperature of the dispenser, respectively.

[0033] like Figure 5 Further, the electromagnetic flow assembly 8 includes a base 801 , a coil 802 and an electrode 803 , the base 801 is provided with a liquid hole in the axial direction, a pair of coils 802 are provided on two opposite sides of the periphery of the base 801 , and a pair of electrodes 803 are provided on the other two opposite sides of the periphery of the base 801 .

[0034] When the dispenser is in working state, a pair of coils 802 are energized to generate a magnetic field. When the liquid flows through the liquid hole, an induced electromotive force is generated at both ends of a pair of electrodes 803. The generated induced electromotive force is processed and output as a flow value that can be directly observed.

[0035] In the present invention, the base 801 is made of insulating material. Since no pressure-bearing steel parts are used, a larger laminar flow path can be matched in a limited space.

[0036] Furthermore, the internal pressure measurement component 10 and the external pressure measurement component 11 both include a pressure sensor, a temperature sensor and a collection circuit board, and the pressure sensor and the temperature sensor are both electrically connected to the collection circuit board.

[0037] Specifically, the internal pressure measuring component 10 is used to measure the internal pressure and internal temperature of the dispenser, and the external pressure measuring component 11 is used to measure the external pressure and external temperature of the dispenser. The pressure sensor converts the pressure value of the detected internal pressure or external pressure into an electrical signal and inputs it into the corresponding acquisition circuit board, which is then converted into a directly observable pressure value for output. The temperature sensor converts the temperature value of the detected internal temperature or external temperature into an electrical signal and inputs it into the corresponding acquisition circuit board, which is then converted into a directly observable temperature value for output.

[0038] Furthermore, a control component located in the upper annular gap is embedded in the upper end of the middle joint 5, and the temperature value and pressure value output by the acquisition circuit board are received and processed by the control component and then uploaded to the ground controller.

[0039] Furthermore, the electric valve core assembly 4 includes a motor, a screw nut mechanism and a valve core. The motor is connected to one end of the screw nut mechanism, and the other end of the screw nut mechanism is connected to the valve core. The motor drives the screw nut mechanism to drive the valve core to move telescopically to adjust the opening size of the water outlet 14 to control the liquid flow rate of the water outlet 14.

[0040] Specifically, the middle joint 5 is provided with a valve core hole in the axial direction, the valve core is slidably nested in the valve core hole, the water outlet 14 is radially connected with the valve core hole, the lower end of the lead screw nut mechanism is embedded in the upper end of the valve core hole and connected to the valve core, one end of the motor is electrically connected with a motor control circuit board, the motor control circuit board is arranged on the internal pressure measuring component 10 or the external pressure measuring component 11, the motor control circuit board outputs different power supplies to control the motor according to the control signal, and the motor drives the lead screw nut mechanism to drive the valve core to move axially in the valve core hole to control the opening size of the water outlet 14. The control signal is sent from the ground controller to the control component, and then transmitted from the control component to the motor control circuit board.

[0041] Furthermore, cable connectors 13 are provided in the axial direction of the upper connector 1 and the axial direction of the lower connector 9. The cable connectors 13 are connected to various electrical components inside the dispenser through wires to provide power supply and signal transmission, and are connected and communicated with various layers of instruments outside the dispenser through connecting cables.

[0042] When the large-diameter balanced pressure electromagnetic intelligent dispenser of the present invention is used for water injection, water flows through the oil pipe string to reach the dispenser, and then flows through the upper center pipe 3, the middle joint 5, the lower center pipe 6 and the lower joint 9 in sequence. A part of the water flows into the next layer, and the other part flows through the electromagnetic flow component 8 and the valve core, and finally is injected into the formation from the water outlet 14. In this process, the electromagnetic flow component 8 measures the injection amount of the water flow, and the balanced pressure piston 16 transmits pressure to balance the pressure inside and outside the electromagnetic flow component 8, so as to achieve work without pressure difference.

Claims

1. A large-diameter balanced pressure electromagnetic intelligent dispensing instrument, characterized in that: The invention comprises an upper ring sleeve component, a lower ring sleeve component and a lower joint (9), wherein the lower ring sleeve component comprises a lower central tube (6) and a lower casing (7) with inner and outer gap rings, the outer periphery of the lower central tube (6) and the inner periphery of the lower casing (7) form a lower annular gap (12), one end of the lower annular gap (12) is connected to the upper ring sleeve component, and the other end of the lower annular gap (12) is connected to the lower joint (9), an electromagnetic flow component (8) is arranged on one side of the lower annular gap (12), and the inner periphery of one end of the electromagnetic flow component (8) is connected to the lower central tube (12) through the lower joint (9). 6) is connected, the lower joint (9) is axially provided with a balancing pressure hole (15), a balancing pressure piston (16) is slidably nested in the balancing pressure hole (15), the balancing pressure hole (15) located at the first end of the balancing pressure piston (16) is connected to the lower annular gap (12), and the balancing pressure hole (15) located at the second end of the balancing pressure piston (16) is connected to the lower center tube (6), when the pressure in the lower center tube (6) rises or falls, the balancing pressure piston (16) transmits pressure along the balancing pressure hole (15) to balance the pressure inside and outside the electromagnetic flow component (8).

2. According to claim 1, a large-diameter balanced pressure electromagnetic intelligent dispensing instrument is characterized in that: The lower annular gap (12) is filled with insulating liquid, the first end of the balancing pressure piston (16) is in contact with the insulating liquid, and the balancing pressure piston (16) moves to squeeze the insulating liquid to transmit pressure.

3. A large-diameter balanced pressure electromagnetic intelligent dispensing instrument according to claim 1 or 2, characterized in that: A blocking tube (17) for stopping the balancing pressure piston (16) is embedded in the inner periphery of one end of the balancing pressure hole (15).

4. The large-diameter balanced pressure electromagnetic intelligent dispensing instrument according to claim 3 is characterized in that: It also comprises a middle joint (5), the upper ring sleeve assembly is connected and interlinked with the lower ring sleeve assembly via the middle joint (5), and one end of the lower annular gap (12) is embedded in the middle joint (5).

5. The large-diameter balanced pressure electromagnetic intelligent dispensing instrument according to claim 4 is characterized in that: The radial outer periphery of the middle joint (5) is provided with a water outlet (14) which is in communication with the inner periphery of the electromagnetic flow component (8).

6. The large-diameter balanced pressure electromagnetic intelligent dispensing instrument according to claim 5 is characterized in that: The upper ring sleeve assembly comprises an upper central tube (3) and an upper casing (2) with inner and outer gap ring sleeves, the outer periphery of the upper central tube (3) and the inner periphery of the upper casing (2) forming an upper annular gap, the upper annular gap connecting the middle joint (5), and the upper central tube (3) passing through the middle joint (5) passes through the lower central tube (6).

7. The large-diameter balanced pressure electromagnetic intelligent dispensing instrument according to claim 6 is characterized in that: An electric valve core assembly (4), an internal pressure measuring assembly (10) and an external pressure measuring assembly (11) located in the upper annular gap are embedded in the upper end portion of the middle joint (5); one end of the electric valve core assembly (4) is connected to the water outlet (14) for controlling the opening of the water outlet (14).

8. The large-diameter balanced pressure electromagnetic intelligent dispensing instrument according to claim 1 is characterized in that: The electromagnetic flow component (8) comprises a base (801), a coil (802) and an electrode (803); the base (801) is provided with a liquid hole in the axial direction; a pair of the coils (802) are arranged on two opposite sides of the periphery of the base (801); and a pair of the electrodes (803) are arranged on the other two opposite sides of the periphery of the base (801).

9. The large-diameter balanced pressure electromagnetic intelligent dispensing instrument according to claim 7 is characterized in that: The internal pressure measurement component (10) and the external pressure measurement component (11) both comprise a pressure sensor, a temperature sensor and a collection circuit board, and the pressure sensor and the temperature sensor are both electrically connected to the collection circuit board.

10. The large-diameter balanced pressure electromagnetic intelligent dispensing instrument according to claim 7, characterized in that: The electric valve core assembly (4) comprises a motor, a screw nut mechanism and a valve core, wherein the motor is connected to the valve core via the screw nut mechanism and is used to drive the screw nut mechanism to drive the valve core to move telescopically so as to adjust the opening of the water outlet (14).

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