Adaptive flow rate components for injection and production wells in the same well and hydrocyclones using them.

Abstract

This disclosure relates to an adaptive flow rate component for injection and production wells in the same well and a hydrocyclone using the same component. The hydrocyclone includes: an underflow flow rate adaptive module, an overflow flow rate adaptive module, and a hydrocyclone separation module. The underflow flow rate adaptive module and the overflow flow rate adaptive module are used to keep the flow rates of the liquid at the underflow port and the liquid at the overflow port constant, ensuring that the split ratio fluctuates stably within a certain range. The underflow port of the hydrocyclone is connected to the underflow flow rate adaptive module, and the overflow port of the hydrocyclone is connected to the overflow flow rate adaptive module. The relative rotation angle between the bridge-type diversion channel and the piston, blade, and stop blade of the flow stabilizer is automatically adjusted according to the flow rate. The cyclone separation module adapts to flow rates; it separates oil and water phases through cyclone separation and discharges them from the overflow port and underflow port respectively; the oil pipe, coupling, and cyclone fixing device in the cyclone separation module connect and fix the entire device, respectively connecting to the underflow flow adaptive module, the cyclone flow and the overflow flow adaptive module; the embodiments given in this disclosure can realize automatic adjustment of the underflow port and overflow port flow rates, stabilize the liquid output of the underflow port and overflow port, reduce the impact of flow instability on the overall separation performance of the device, and enhance the applicability of the cyclone separation equipment to unstable outlet flow conditions, ensuring stable separation efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of downhole injection and production in oilfields, and more specifically, to a cyclone separator that can achieve oil and water phase separation downhole in the process of injection and production in oilfields. Background Technology

[0002] The application of hydrocyclones in the same-well injection-production process is currently limited, one important factor being the unstable outlet flow rate, which leads to low separation efficiency. Therefore, solving the problem of unstable flow rates at the bottom outlet and overflow outlet has become a key step in improving the performance of hydrocyclones. In addition, the size of the outlet flow rate also has a significant impact on the overflow separation rate of the hydrocyclone. Existing technologies have relevant solutions, such as: 1. Intelligent steady-flow hydrocyclone, patent (application) number: 201320508831.0, which uses valves installed at the outlet and inlet to stabilize the flow rate. The size of the outlet flow rate also has a significant impact on the overflow separation rate of the hydrocyclone. Most existing technologies control the flow rate by controlling the valves outside the hydrocyclone or by changing the overflow pipes of different diameters to control the overflow liquid separation volume. Frequent flow control is not only inconvenient but also affects the separation performance. 2. The content disclosed in CN110905347 A, trestle-type downhole flow adaptive liquid-liquid separation device, patent (application) number: 2018102633524. However, this mechanical structure is relatively complex. The push rod and other mechanical components obstruct the liquid flow, and the direct impact of the oil-water mixture affects the stability of the flow field, directly leading to unstable separation efficiency and poor oil-water separation performance. In actual operation, the inlet liquid flow contains impurities, which are more easily affected by these impurities in the small connecting parts of the mechanical structure and the spring extension path, resulting in blockages and jamming. The pressure stabilizer at the underflow point causes instability in the underflow flow rate due to direct impact, preventing the hydrocyclone from operating at a stable split ratio. 3. A hydrocyclone with adjustable overflow, patent number: 202121696772.5. However, this hydrocyclone uses an adjustable overflow component to manually adjust the upper strip hole to control the overflow flow rate. The size of the outlet flow rate also significantly affects the overflow separation rate of the hydrocyclone separator, and does not fundamentally solve the existing technical problems. Summary of the Invention

[0003] This disclosure proposes an adaptive flow rate component for injection and production wells and a hydrocyclone using the same, which solves the problems of the prior art mentioned in the background section. Compared with the bridge-type downhole flow rate adaptive liquid-liquid separator, the technical solution presented in this disclosure has no other obstructions in the hydrocyclone chamber, which can ensure the stability of the flow field and separation efficiency. The mechanical movement of the flow rate adaptive device at the bottom outlet is simple, and the bearing moving chamber is sealed to prevent it from being affected by impurities in the treated fluid, thus isolating the moving part from the working chamber. The technical solution presented in this disclosure achieves flow and pressure stabilization by the liquid flow impacting the piston. The outlet liquid flow impacts the inclined surface of the piston, causing energy loss and achieving a pressure stabilization effect. The impact also causes the piston to rotate, changing the outlet size to achieve stable outlet flow. Finally, the bottom flow and overflow self-stabilizing device can be adjusted to achieve a stable flow split ratio. In addition, the technical solution presented in this disclosure adds a flow rate adaptive device to the bottom outlet and overflow outlet of the hydrocyclone, stabilizing the outlet flow rate within a certain range. Through certain adjustments, the hydrocyclone can be stabilized within a certain flow split ratio range. Furthermore, the liquid flow impacts the piston and blades, reducing the outlet pressure and achieving a pressure stabilization effect.

[0004] The same-well injection-production well flow adaptive component disclosed herein, basic scheme 1: the component includes a bottom flow adaptive module, and its unique feature is:

[0005] The underflow adaptive module includes a bridge channel 8, a gravity baffle 9, a fixed shaft 10, a bridge-type diversion channel 11, a flow stabilizer piston 12, a variable diameter connection 13, a spring 14, a bearing 15, a lower end cover 16, an upper end cover 17, and a felt 18.

[0006] The bridge-type channel 8 is provided with a bridge-type axial channel 801, a bridge-type radial channel 802, a bridge-type radial channel inlet 803, a bridge-type radial channel outlet 804, a bridge-type channel lower end external thread 805, a bridge-type channel upper end external thread 806, a bridge-type channel radial inlet thread 807, a bridge-type channel upper end internal thread, a fixing hole 809, and a stop block limiting groove 810.

[0007] The gravity block 9 is provided with a gravity block fixing hole 901, a block head 902 and a block tail 903.

[0008] The bridge-type diversion channel 11 is provided with a diversion channel inlet 1101, a diversion channel outlet 1102, and a diversion channel upper end thread 1103.

[0009] The flow stabilizer piston 12 is provided with a flow stabilizer piston inlet 1201, a flow stabilizer piston outlet 1202, a first-stage flow stabilizer piston boss 1203, a second-stage flow stabilizer piston boss 1204, a third-stage flow stabilizer piston boss 1205, and a flow stabilizer piston channel 1206.

[0010] The reducing connection 13 is a transitional connection, and is provided with a reducing connection inlet 1301, a reducing connection outlet, and a reducing connection upper thread 1303.

[0011] The lower end cover 16 is provided with a lower end cover groove 1601 and a lower end cover boss 1602.

[0012] The upper cover 17 is provided with an inner limiting groove 1701 and an inner limiting groove notch 1702.

[0013] The upper external thread 806 of the bridge channel is connected to the upper thread 1103 of the diversion channel. The lower external thread 805 of the bridge channel is connected to the upper thread 1303 of the reducing connection by thread. The gravity block fixing hole 901 and the fixing hole 809 are fixed together by the fixing shaft 10. The gravity block 9 can be rotated around the axis at a fixed angle by the contact and limiting of the block limiting groove 810 with the block head 902 and the block tail 903.

[0014] The upper end cover 17 is connected to the lower end cover 16 and the bridge-type flow channel 11 by threads. The inner limiting groove 1701 of the upper end cover is used to place the spring 14 and can limit the radial movement of the spring 14. The inner groove notch 1702 of the upper end cover is used to assemble the flow stabilizer piston 12, so that the three-stage boss 1205 of the flow stabilizer piston can enter the inner limiting groove 1701 of the upper end cover, ensuring that the spring 14 is positioned and sealed.

[0015] The upper and lower end caps are connected by threads. The lower end cap boss 1602 presses against the outer ring of the bearing 15 to position the outer ring axially. The lower end cap groove 1601 is filled with felt 18 to achieve a seal.

[0016] The first-stage boss 1203 of the flow stabilizer piston is pressed against the inner ring of the bearing 15 to complete the axial positioning. The second-stage boss 1204 of the flow stabilizer piston radially seals the inner limiting groove 1701 of the upper end cover to prevent the spring 14 from moving radially. During assembly, the third-stage boss 1205 of the flow stabilizer piston enters through the notch 1702 of the inner groove of the upper end cover. The flow stabilizer piston makes a reset movement under the action of elastic force by squeezing the spring 14 through the side wall of the third-stage boss. There are two channels 1206 of the flow stabilizer piston, both of which are spiral in shape and correspond to the inlet 1101 of the flow channel at the upper end.

[0017] The reducing connection 13 is threaded to the bottom of the bridge channel.

[0018] Based on the basic scheme 1, further optimization yields scheme 2: the component also includes an overflow flow adaptive module.

[0019] The overflow flow adaptive module includes an overflow stabilizer housing 19, a fixing ring 20, a torsion bar spring base 21, a torsion bar spring 22, a blade 23, a bearing 24, and a stop blade 25.

[0020] The overflow stabilizer housing 19 is a cylindrical structure with openings at both ends, and is provided with a lower end thread 1901, an upper end thread 1902, an inner boss 1903, an overflow stabilizer inlet 1904, an overflow stabilizer outlet 1905, and an overflow stabilizer retaining ring fixing thread 1906.

[0021] The retaining ring 20 is provided with a retaining ring thread and a retaining ring tooth groove 2002.

[0022] The torsion bar spring base 21 is provided with a central annular cavity 2101 and an inner spline on the torsion bar spring base.

[0023] The torsion bar spring 22 is a shaft that can be twisted and withstand a certain torque. When torque is applied within a certain range, it is torsional and deformed. When the torque is removed, it can return to the state before the torque was applied. The torsion bar spring 22 is provided with a lower spline groove, an upper spline groove 2202, and a shoulder 2203.

[0024] The blade 23 is provided with a blade spline 2301, a blade opening 2302, and an upper blade boss 2303.

[0025] The stop blade 25 is provided with a stop blade groove 2501, a stop blade opening 2502, and a stop blade boss 2503.

[0026] The inner boss 1903 of the overflow stabilizer housing contacts the stop vane 25 and positions it axially. The fixing thread 1906 of the overflow stabilizer fixing ring is threadedly connected to the fixing ring thread.

[0027] The stop vane openings 2502 are evenly distributed around the axis of the stop vane 25 to ensure smooth passage of liquid; the stop vane grooves 2501 are used to place the bearing 24 so that the outer ring of the bearing is radially positioned; and the stop vane bosses 2503 are used to hold the outer ring of the bearing to achieve axial positioning of the bearing 24.

[0028] The outer ring of bearing 24 contacts the stop vane boss 2503, and the inner ring of bearing 24 contacts the vane boss 2303, thereby achieving axial positioning of the vane 23.

[0029] The blade openings 2302 are evenly distributed around the center of the blade 23, and have the same size and number as the stop blade openings 2502; the blade spline 2301 cooperates with the upper spline groove 2202 of the torsion bar spring to fix the lower torsion bar spring 22.

[0030] The shoulder 2203 of the torsion bar spring located at the top of the torsion bar spring 22 contacts the inner ring of the bearing 24 to position the bearing 24. The spline groove at the lower end of the torsion bar spring engages with the spline on the inner side of the torsion bar spring base to achieve axial positioning of the lower end of the torsion bar spring 22.

[0031] The torsion bar spring base 21 is fixed by contacting and being pressed by the retaining ring 20; the retaining ring 20 and the overflow stabilizer housing 19 are connected by the overflow stabilizer retaining ring fixing thread 1906 and the retaining ring thread.

[0032] Further optimization of Scheme 2 yields Scheme 3:

[0033] The assembly also includes a cyclone separation module, which comprises a cyclone separator mounting base, a coupling, and a cyclone separator 7. The cyclone separator mounting base is provided with a coupling fixing thread 501, a cyclone separator fixing thread 502, and an overflow module fixing thread 503. The coupling is provided with a coupling connecting thread 601.

[0034] The swirling fluid 7 is provided with a swirling fluid inlet 701, a swirling fluid underflow outlet 702, a swirling fluid overflow outlet 703, a swirling fluid upper end thread 704, and a swirling fluid lower end thread 705.

[0035] The swirling fluid fixing seat is connected to the upper end thread 704 of the swirling fluid, the coupling connecting thread 601, and the lower end thread 1901 of the overflow stabilizer housing through the swirling fluid fixing thread 502, the coupling fixing thread 501, and the overflow module fixing thread 503, respectively; the lower end of the overflow stabilizer housing 19 is threadedly connected to the overflow module fixing thread 503 through the overflow stabilizer housing lower end thread 1901 and fixed on the swirling fluid fixing seat.

[0036] The lower end thread 705 of the vortex fluid is connected to the radial inlet thread 807 of the bridge channel to fix the bottom end of the vortex fluid;

[0037] The radial inlet thread 807 of the bridge-type channel is threaded to the lower end thread 705 of the vortex fluid.

[0038] Another aspect of this disclosure is the provision of an adaptive cyclone separator for in-well flow rate in both injection and production wells, characterized by:

[0039] At least one set of flow adaptive components described in Scheme 3 and swirl tubing 4 are used to form a downhole swirl separator that can be connected to the same well injection and production process string.

[0040] The swirling oil pipe is provided with an upper thread 401 and a lower thread 402; the swirling oil pipe 4 is connected and fixed to the coupling thread 601 and the upper internal thread of the bridge channel respectively through the upper thread 401 and the lower thread 402, and the swirling fluid 7 is placed inside the swirling oil pipe 4; the upper internal thread of the bridge channel is threadedly connected to the lower thread 402 of the swirling oil pipe.

[0041] Furthermore, the application of this disclosure extends to a same-well injection and production process string: its unique feature is that the lower end of the process string is sequentially connected to the flow adaptive cyclone separator as described in claim 4; the upper end of the underflow flow adaptive module is connected to the lower end of the process string via a thread, and the lower end of the overflow flow adaptive module is connected to the pump set via the variable diameter connection.

[0042] After connection, the oil-water mixture enters through the variable diameter connection inlet 1301 and flows into the cyclone oil pipe 4. After entering the cyclone 7 through the cyclone inlet 701, cyclone separation begins. The water phase flows out from the underflow port 702 of the cyclone separator, flows through the underflow flow adaptive module 1, and is discharged from the piston outlet 1202 of the flow stabilizer. The oil phase flows out from the overflow port 703 of the cyclone separator, flows through the overflow flow adaptive module 2, and is discharged from the outlet 1905 of the overflow flow stabilizer.

[0043] The above-described at least one technical solution adopted in one or more embodiments of this specification can achieve the following beneficial effects:

[0044] First, the components and hydrocyclones disclosed herein are innovative in their overall structure. They adopt a vertical working mode, which can adapt to changes in outlet flow rate from the overflow port, underflow port to the upper and lower outlets of the hydrocyclone oil pipe, and meet the requirement of stable flow ratio for variable flow.

[0045] Secondly, the bottom of the hydrocyclone disclosed herein is an underflow adaptive module. Entering this module allows for initial and secondary flow stabilization of the underflow. Initial flow stabilization is achieved by the underflow liquid impacting a gravity baffle, which makes the underflow entering the secondary flow stabilized, thus avoiding a decrease in the separation performance of the hydrocyclone separator due to unstable flow.

[0046] Secondly, the top overflow flow adaptive module uses a torsion bar spring to rotate the blades, changing the opening size. This stabilizes the overflow flow rate and ensures separation efficiency.

[0047] In addition, the hydrocyclone disclosed herein has a compact and neat structure, with each part being easy to process, convenient to assemble, highly interchangeable, and the overall structure is connected to the hydrocyclone oil pipe by threads, occupying a small area, with a diameter that is basically equal to the diameter of the hydrocyclone oil pipe, making it easy to install.

[0048] Furthermore, the hydrocyclone disclosed herein can be applied to both single-pump and dual-pump systems. For a single-pump input hydrocyclone separation system, compared to a traditional single-pump hydrocyclone separation system, it allows for adaptive outlet flow and a stable split ratio. For a dual-pump suction hydrocyclone separation system, this device has a compact structure with no active moving parts, consumes no electrical energy, thus reducing costs, improving economic efficiency, and minimizing environmental pollution.

[0049] In summary, the hydrocyclone and corresponding process tubing disclosed herein integrate functions such as cyclone separation, flow rate adaptation, and stable split ratio. It achieves overflow flow rate adaptation by changing the rotation angle of the blades through the overflow port and changing the opening and closing angle. It also achieves underflow flow rate adaptation by changing the outlet size through liquid flow impacting the baffle and piston.

[0050] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0051] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0052] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0053] Figure 1 This is an external view of the hydrocyclone described in this disclosure.

[0054] Figure 2 This is an exploded view of the hydrocyclone described in this disclosure.

[0055] Figure 3 This is an overall cross-sectional view of the hydrocyclone described in this disclosure.

[0056] Figure 4 This is an overall appearance diagram of the overflow flow adaptive module described in this disclosure.

[0057] Figure 5 This is an exploded view of the overflow flow adaptive module described in this disclosure.

[0058] Figure 6 This is a cross-sectional view of the overflow flow adaptive module described in this disclosure.

[0059] Figure 7 This is a cross-sectional view of the interior of the overflow regulator housing described in this disclosure.

[0060] Figure 8 This is a structural diagram of the stop blade described in this disclosure.

[0061] Figure 9 This is a diagram of the blade structure described in this disclosure.

[0062] Figure 10 This is an overall appearance diagram of the bottom flow adaptive module described in this disclosure.

[0063] Figure 11 This is an exploded view of the bottom flow adaptive module described in this disclosure.

[0064] Figure 12 This is a cross-sectional view of the bottom flow adaptive module described in this disclosure.

[0065] Figure 13 This is a directional view of the bridge-type channel described in this disclosure.

[0066] Figure 14 This is a view of the piston of the flow stabilizer described in this disclosure.

[0067] Figure 15 This is a radial cross-sectional view of the underflow adaptive module described in this disclosure.

[0068] Figure 16 This is a structural diagram of the upper end cap as described in this disclosure.

[0069] Figure 17 This is a structural diagram of the lower end cap as described in this disclosure.

[0070] Figure 18 This is a structural diagram of the bridge-type drainage channel described in this disclosure.

[0071] Figure 19 This is a diagram of the variable diameter connection structure described in this disclosure.

[0072] Figure 20 Image (a) shows the overall appearance of the cyclone separation module. Figure 20 (b) is a cross-sectional view of the cyclone separation module.

[0073] In the diagram: 1 - Underflow adaptive module, 2 - Overflow adaptive module, 3 - Swirl separation module, 4 - Swirl tubing, 401 - Upper thread of swirl tubing, 402 - Lower thread of swirl tubing, 501 - Coupling fixing thread, 502 - Swirl generator fixing thread, 503 - Overflow module fixing thread, 601 - Coupling connection thread, 7 - Swirl fluid, 701 - Swirl fluid inlet, 702 - Swirl fluid underflow port, 703 - Swirl fluid overflow port, 704 - Upper thread of swirl fluid, 705 - Lower thread of swirl fluid, 8 - Bridge channel, 801 - Bridge axial channel, 802 - Bridge radial channel, 803 - Bridge radial channel inlet 804-Bridge-type radial channel outlet, 805-Bridge-type channel lower end external thread, 806-Bridge-type channel upper end external thread, 807-Bridge-type channel radial inlet thread, 809-Fixing hole, 810-Stop limit groove, 9-Gravity stop block, 901-Gravity stop block fixing hole, 902-Stop block head, 903-Gravity stop block tail, 10-Fixing shaft, 11-Bridge-type guide channel, 1101-Guide channel inlet, 1102-Guide channel outlet, 1103-Guide channel upper end thread, 12-Flow stabilizer piston, 1201-Flow stabilizer piston inlet, 1202-Flow stabilizer piston outlet, 1203-Flow stabilizer piston first-stage boss, 1 204 - Second-stage boss of the flow stabilizer piston; 1205 - Third-stage boss of the flow stabilizer piston; 1206 - Flow stabilizer piston channel; 13 - Reducing diameter connection; 1301 - Inlet of the reducing diameter connection; 1303 - Upper thread of the reducing diameter connection; 14 - Spring; 15 - Bearing; 16 - Lower end cover; 1601 - Lower end cover groove; 1602 - Lower end cover boss; 17 - Upper end cover; 1701 - Inner limiting groove of the upper end cover; 1702 - Notch of the inner limiting groove of the upper end cover; 18 - Felt; 19 - Overflow flow stabilizer housing; 1901 - Main structure includes lower thread of the overflow flow stabilizer housing; 1902 - Upper thread of the overflow flow stabilizer housing; 1903 - Overflow flow stabilizer... 1904 - Overflow stabilizer inlet, 1905 - Overflow stabilizer outlet, 1906 - Overflow stabilizer retaining ring fixing thread, 20 - Retaining ring, 2002 - Retaining ring toothed groove, 21 - Torsion bar spring base, 2101 - Torsion bar spring base annular opening, 22 - Torsion bar spring, 2202 - Torsion bar spring upper end spline groove, 2203 - Torsion bar spring shoulder, 23 - Blade, 2301 - Blade spline, 2302 - Blade opening, 2303 - Upper blade boss, 24 - Bearing, 25 - Stop blade, 2501 - Stop blade groove, 2502 - Stop blade opening, 2503 - Stop blade boss. Detailed Implementation

[0074] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0075] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0076] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0077] An external view of the cyclone separator described in this disclosure is shown below. Figure 1 As shown, this device can stabilize the flow rates of the oil and water phases after the separation of the oil-water mixture, and the split ratio can fluctuate stably within a certain range. Figure 2 The exploded view of the hydrocyclone described in this disclosure shows that it mainly consists of an underflow adaptive module 1, an overflow adaptive module 2, and a hydrocyclone separation module 3. The overall sectional view is shown below. Figure 3 As shown, the oil-water mixture enters the device through the variable-diameter inlet 1301, flows through the cyclone oil pipe 4, and enters the cyclone separator 7 through the cyclone separator inlet 701 for cyclone separation. The aqueous phase flows out from the underflow outlet 702 of the cyclone separator and passes through the underflow flow adaptive module 1 to stabilize the underflow flow rate within a certain range, finally being discharged from the flow stabilizer piston outlet 1202. The oil phase flows out from the overflow outlet 703 of the cyclone separator and passes through the overflow flow adaptive module 2 to stabilize the overflow flow rate within a certain range, finally being discharged from the overflow flow stabilizer outlet 1905.

[0078] Figure 4 The diagram shows the overall appearance of the overflow flow adaptive module. The lower thread 1901 of the overflow stabilizer housing is connected to the upper thread 401 of the swirling tubing to fix the entire device. The upper thread 1902 of the overflow stabilizer housing can be connected to other downhole processing devices or collection devices. Figure 5 The exploded view of the overflow flow adaptive module shows that it mainly consists of an overflow stabilizer housing 19, a retaining ring 20, a torsion bar spring base 21, a torsion bar spring 22, blades 23, a bearing 24, and a stop blade 25. A cross-sectional view of the overflow flow adaptive module is shown below. Figure 6As shown, the oil phase enters the overflow flow adaptive module 2 from the overflow stabilizer inlet 1904, passes through the fixed annular toothed groove 2002 and the annular space 2101 of the torsion bar spring base, and impacts the blade 23. The blade 23 rotates due to the impact force of the liquid phase. The torsion bar spring 22 and the blade 23 are connected through the spline groove 2202 at the upper end of the torsion bar spring and the spline 2301 of the blade, causing the torsion bar spring 22 to rotate by a certain angle. This changes the relative position of the blade opening 2302 and the stop blade opening 2502, thereby adjusting the outlet size and achieving the effect of stabilizing the overflow flow within a certain range. That is, when the overflow flow increases, the outlet opening decreases, and the flow rate decreases after passing through the overflow flow adaptive device. When the overflow flow decreases, the impact force on the blade 23 decreases, and the blade 23 rotates under the elastic action of the torsion bar spring. The relative position of the blade opening 2302 and the stop blade opening 2502 changes, the outlet opening increases, and the flow rate increases after passing through the overflow flow adaptive device.

[0079] Figure 7 This is a cross-sectional view of the inside of the overflow stabilizer housing. The main structures include the overflow stabilizer housing lower end thread 1901, the overflow stabilizer housing upper end thread 1902, the overflow stabilizer housing inner boss 1903, and the overflow stabilizer fixing ring fixing thread 1906. Among them, the overflow stabilizer housing inner boss is an axial positioning feature for the internal device, achieving upper positioning by contacting the stop blade. The overflow stabilizer fixing ring fixing thread 1906 is threadedly connected to the fixing ring thread to achieve lower positioning. The overflow stabilizer housing lower end thread 1901 is connected and fixed to the overflow module fixing thread 503. The overflow stabilizer housing upper end thread 1902 is connected to other tubular modules.

[0080] Figure 8 The diagram shows the structure of the stop blade. The main components include a stop blade groove 2501, a stop blade opening 2502, and a stop blade boss 2503. The stop blade groove is used to place the bearing and radially position it. The stop blade boss achieves axial positioning of the upper end of the bearing outer ring by contacting it.

[0081] Figure 9 The diagram shows the blade structure, which mainly consists of a blade spline 2301, a blade opening 2302, and an upper blade boss 2303. The blade spline engages with the upper spline groove 2202 of the torsion bar spring to fix the lower end of the blade axially. The upper blade boss contacts the inner ring of the bearing to fix the upper end of the blade axially. The liquid phase flows through the blade opening 2302.

[0082] Figure 10This is an overall view of the underflow adaptive module. The entire device is fixed to the cyclone tubing via an external thread 806 at the upper end of a bridge-type channel. The lower end, a reducing connector 13, connects to the pump unit, allowing for adjustment of the inlet diameter. It connects to the cyclone tubing, and the high-pressure mixture is pumped in through the reducing connector inlet 1301, which serves as the liquid phase inlet for the entire device. The flow stabilizer piston outlet 1202 is the aqueous phase outlet for the underflow, from which the underflow treated fluid is discharged back into the formation.

[0083] Figure 11 The exploded view of the bottom flow adaptive module mainly consists of a bridge channel 8, a gravity block 9, a fixed shaft 10, a bridge diversion channel 11, a flow stabilizer piston 12, a variable diameter connection 13, a spring 14, a bearing 15, a lower end cover 16, an upper end cover 17, and a felt 18.

[0084] Figure 12 This is a cross-sectional view of the underflow adaptive module. The pumped fluid enters the cyclone oil pipe 4 from the bridge-type axial channel 801. After being separated by the hydrocyclone 7, the underflow flows through the bridge-type radial channel inlet 803 into the bridge-type radial channel 802. The fluid flow impacts the gravity baffle 8, causing it to rotate a certain angle around the gravity baffle fixing hole 901. The fluid flow causes the tail 903 of the baffle to press down and the head 902 to rise, changing the degree of obstruction of the gravity baffle on the bridge-type radial channel outlet 804, thus changing the underflow flow rate. The aqueous phase exiting the bridge-type radial channel enters the bridge-type diversion channel 11 and is discharged from the bridge-type diversion channel outlet 1102. The inlet 1201 of the flow stabilizer piston 12 and the outlet of the bridge-type drainage channel form a certain angle with the central axis of the device as the center. The flow stabilizer piston channel 1206 has a spiral structure. When the liquid flow impacts the spiral wall, it causes the flow stabilizer piston to rotate, thereby changing the degree of obstruction of the bridge-type drainage channel outlet 1102, achieving a change in flow rate and completing secondary flow adaptive stabilization. That is, when the flow rate of the liquid entering from the bridge-type drainage channel 11 increases, the impact force of the liquid flow increases, and the flow stabilizer piston 12 presses the spring 14. Under the fixation of the bearing 15, the unopened part of the flow stabilizer piston 12 obstructs the bridge-type drainage channel outlet 1102, reducing the flow rate and stabilizing it within a certain range. When the liquid flow rate decreases, due to the action of the spring, the flow stabilizer piston 12 rotates back a certain angle, reducing the obstruction of the bridge-type drainage channel outlet 1102 by the unopened part of the flow stabilizer piston 12, increasing the flow rate and stabilizing it within a certain range.

[0085] Figure 13This is a directional view of a bridge-type channel. Its main structures include a bridge-type axial channel 801, a bridge-type radial channel 802, a bridge-type radial channel inlet 803, a bridge-type radial channel outlet 804, a bridge-type channel lower end external thread 805, a bridge-type channel upper end external thread 806, a bridge-type channel radial inlet thread 807, a bridge-type channel upper end internal thread, a fixing hole 809, and a stop block limiting groove 810. The lower end external thread 805 of the bridge channel is connected to the upper thread 1303 of the reducer connection. The upper end external thread 806 of the bridge channel is threadedly connected and fixed to the upper thread 1103 of the guide channel. The radial inlet thread 807 of the bridge channel is threadedly connected to the lower end thread 705 of the hydrocyclone. The axial bridge channel 801 and the radial bridge channel 802 are not connected to each other and are distributed intersectingly. The mixed liquid pumped in by the axial bridge channel 801 enters the hydrocyclone oil pipe and flows into the hydrocyclone inlet. After being separated by hydrocyclone 7, it enters the radial bridge channel inlet 803 from the bottom outlet 702 of the hydrocyclone. The liquid in the radial bridge channel inlet 803 and the axial bridge channel 801 do not mix. The fixing hole 809 on the side wall of the bridge channel is used to fix the gravity stop 9 through the fixing shaft 10.

[0086] Figure 14 View of the flow regulator piston Figure 15 The following are radial sectional views of the device and the underflow adaptive module. The main structures include a flow stabilizer piston inlet 1201, a flow stabilizer piston outlet 1202, a first-stage flow stabilizer piston boss 1203, a second-stage flow stabilizer piston boss 1204, a third-stage flow stabilizer piston boss 1205, and a flow stabilizer piston channel 1206. The flow stabilizer piston channel is a symmetrically distributed spiral inclined channel, allowing the entire device to rotate under different impact forces. The first-stage flow stabilizer boss 1203 contacts the bearing to ensure axial positioning. The second-stage flow stabilizer boss 1204 seals the inner limiting groove 1701 of the upper end cover. This design prevents the spring from moving radially. When the entire flow stabilizer piston moves under force, the third-stage boss 1205 of the flow stabilizer compresses the spring. The degree of compression varies depending on the force applied. For example, when the flow rate increases, the liquid flow impacts the spiral inclined surface of the flow stabilizer piston channel, causing the flow stabilizer piston to rotate. The third-stage boss of the flow stabilizer compresses the spring, reducing the relative opening between the flow stabilizer piston inlet 1201 and the bridge-type drainage channel outlet 1102, thus reducing the flow rate. To a certain extent, the spring force and the liquid flow impact force balance, ensuring stable fluctuations in the rotation angle of the flow stabilizer piston 12, resulting in a stable decrease in the outlet flow rate. If the flow rate decreases, the force impacting the spiral inclined surface of the flow stabilizer piston channel 1206 decreases. Due to the spring force, the spring extends, causing the flow stabilizer blades to reverse, changing the relative opening size between the flow stabilizer piston inlet 1201 and the bridge-type drainage channel outlet 1102, increasing the opening size, and thus increasing the outlet flow rate and stabilizing the fluctuation.

[0087] Figure 16The diagram shows the structure of the upper end cover. The upper end cover 17 mainly consists of an inner limiting groove 1701 and an inner limiting groove notch 1702. The inner limiting groove 1701 is used to insert the spring 14, allowing it to compress and extend within it. The inner limiting groove notch 1702 is used to insert the third-stage boss 1205 of the flow stabilizer into the inner limiting groove during assembly. Finally, the second-stage boss of the flow stabilizer seals the inner limiting groove. After inserting the spring and assembling the third-stage boss of the flow stabilizer, the limiting groove allows the third-stage boss to move within a certain range, thus ensuring that the flow stabilizer piston rotates within a certain range.

[0088] Figure 17 The diagram shows the structure of the lower end cover. The main components of the lower end cover 16 are a lower end cover groove 1601 and a lower end cover boss 1602. The lower end cover boss 1602 is used to insert the felt 18 to ensure the sealing of the bearing 15. The lower end cover boss 1602 ensures the axial positioning of the lower end of the bearing through contact. The upper and lower end covers are connected by threads.

[0089] Figure 18 The main structure of the bridge-type diversion channel 11 includes a diversion channel inlet 1101, a diversion channel outlet 1102, and a threaded upper end 1103. The threaded upper end 1103 of the diversion channel is threadedly connected to the external thread 806 of the upper end of the bridge channel. The diversion channel outlet 1102 consists of two symmetrically distributed quarter-circular annular channels, corresponding to the piston inlet 1202 of the flow stabilizer. The flow rate is controlled by changing the relative opening size.

[0090] Figure 19 The diagram shows the structure of the variable diameter connection. The main structure of the variable diameter connection 13 includes a variable diameter connection inlet 1301, a variable diameter connection outlet, and a variable diameter connection upper thread 1303. The variable diameter connection upper thread 1303 is connected and positioned with the lower external thread 805 of the bridge channel. The variable diameter connection inlet 1301 is used to pump the mixed liquid into the mechanism.

[0091] Figure 20The diagram shows the overall appearance and cross-sectional view of the cyclone separator module. Its main structures include: upper end thread 401 of the cyclone oil pipe, lower end thread 402 of the cyclone oil pipe, coupling fixing thread 501, cyclone separator fixing thread 502, overflow module fixing thread 503, coupling connecting thread 601, upper end thread 704 of the cyclone separator, and lower end thread 705 of the cyclone separator. The coupling 6 connects the coupling fixing thread 501 and the upper end thread 401 of the cyclone oil pipe via the coupling connecting thread 601. The cyclone oil pipe 4 and the cyclone fixing device 5 are connected together. The cyclone 7 and the cyclone fixing device 5 are connected by the upper end thread 704 and the cyclone fixing thread 502 of the cyclone. The cyclone is fixed by the lower end thread 705 of the cyclone and the radial inlet thread 807 of the bridge channel. The lower end thread 402 of the cyclone oil pipe is connected and fixed by the upper end internal thread of the bridge channel. The upper end is fixed by the overflow module fixing thread 503 and the lower end thread 1901 of the overflow stabilizer housing.

[0092] After being pumped into the cyclone separation module, the liquid phases are separated and discharged from the underflow overflow port. After passing through the underflow and overflow flow adaptive module, the flow rate can be stabilized and the fluctuation can be stabilized, thus achieving a stable split ratio. This avoids the impact of unstable flow rate on the separation efficiency. The multi-stage series combination is suitable for industrial-scale separation of injection and production media in the same well and has high practical value.

[0093] The embodiments described above are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A flow rate adaptive component within the same injection and production well, comprising a bottom flow rate adaptive module, characterized in that: The underflow adaptive module includes a bridge channel (8), a gravity baffle (9), a fixed shaft (10), a bridge diversion channel (11), a flow stabilizer piston (12), a variable diameter connection (13), a spring (14), a bearing (15), a lower end cover (16), an upper end cover (17), and a felt (18). The bridge channel (8) is provided with a bridge axial channel (801), a bridge radial channel (802), a bridge radial channel inlet (803), a bridge radial channel outlet (804), a bridge channel lower end external thread (805), a bridge channel upper end external thread (806), a bridge channel radial inlet thread (807), a bridge channel upper end internal thread, a fixing hole (809), and a stop block limiting groove (810). The gravity block (9) is provided with a gravity block fixing hole (901), a block head (902) and a block tail (903); The bridge-type diversion channel (11) is provided with a diversion channel inlet (1101), a diversion channel outlet (1102) and a diversion channel upper end thread (1103). The flow stabilizer piston (12) is provided with a flow stabilizer piston inlet (1201), a flow stabilizer piston outlet (1202), a first-order boss (1203), a second-order boss (1204), a third-order boss (1205), and a flow stabilizer piston channel (1206). The reducing connection (13) is a transition connection, and is provided with a reducing connection inlet (1301), a reducing connection outlet and a reducing connection upper thread (1303). The lower end cover (16) is provided with a lower end cover groove (1601) and a lower end cover boss (1602). The upper end cover (17) is provided with an inner limiting groove (1701) and an inner limiting groove notch (1702). The upper external thread (806) of the bridge channel is connected to the upper thread (1103) of the drainage channel, and the lower external thread (805) of the bridge channel is connected to the upper thread (1303) of the variable diameter connection through threads. The gravity block fixing hole (901) and the fixing hole (809) are fixed together through the cooperation of the fixing shaft (10). Through the contact and limiting of the block limiting groove (810) with the block head (902) and the block tail (903), the gravity block (9) can rotate around the axis at a fixed angle. The upper end cover (17) is connected to the lower end cover (16) and the bridge-type drainage channel (11) by threads. The inner limiting groove (1701) of the upper end cover is used to place the spring (14) and can limit the radial movement of the spring (14). The inner groove notch (1702) of the upper end cover is used to assemble the flow stabilizer piston (12), so that the three-stage boss (1205) of the flow stabilizer piston can enter the inner limiting groove (1701) of the upper end cover, ensuring that the spring (14) is positioned and sealed. The upper and lower end caps are connected by threads. The lower end cap boss (1602) presses against the outer ring of the bearing (15) to position the outer ring axially. The lower end cap groove (1601) is filled with felt (18) to achieve sealing. The first-stage boss (1203) of the flow stabilizer piston is pressed against the inner ring of the bearing (15) to complete the axial positioning. The second-stage boss (1204) of the flow stabilizer piston radially seals the inner limiting groove (1701) of the upper end cover to prevent the spring (14) from moving radially. The third-stage boss (1205) of the flow stabilizer piston enters through the groove notch (1702) of the upper end cover during assembly. The flow stabilizer piston makes a reset movement under the action of the elastic force by squeezing the spring (14) through the side wall of the third-stage boss. There are two channels (1206) of the flow stabilizer piston, both of which are spiral and correspond to the inlet (1101) of the flow channel at the upper end. The reducing connection (13) is threaded to the bottom of the bridge channel; The component also includes an overflow flow adaptive module; The overflow flow adaptive module includes an overflow stabilizer housing (19), a fixing ring (20), a torsion bar spring base (21), a torsion bar spring (22), a blade (23), a bearing (24), and a stop blade (25). The overflow stabilizer housing (19) is a cylindrical structure with openings at both ends, and is provided with a lower end thread (1901), an upper end thread (1902), an inner boss (1903), an overflow stabilizer inlet (1904), an overflow stabilizer outlet (1905), and an overflow stabilizer retaining ring fixing thread (1906). The retaining ring (20) is provided with a retaining ring thread and a retaining ring tooth groove (2002); The torsion bar spring base (21) is provided with a central annular space (2101) and an inner spline on the torsion bar spring base; A torsion bar spring (22) is a shaft that can be twisted and bear a certain torque. When a torque is applied within a certain range, it is torsional and deformed. When the torque is removed, it can return to the state before the torque was applied. The torsion bar spring 22 is provided with a lower spline groove, an upper spline groove (2202), and a shoulder (2203). The blade (23) is provided with a blade spline (2301), a blade opening (2302), and an upper blade boss (2303). The stop blade (25) is provided with a stop blade groove (2501), a stop blade opening (2502), and a stop blade boss (2503).

2. The adaptive flow rate component within the same injection and production well as described in claim 1, characterized in that: The inner boss (1903) of the overflow stabilizer housing contacts the stop vane (25) and positions it axially. The fixing thread (1906) of the overflow stabilizer fixing ring is threadedly connected to the fixing ring thread. The stop vane openings (2502) are evenly distributed around the axis of the stop vane (25) to ensure smooth passage of liquid; the stop vane grooves (2501) are used to place the bearing (24) in so that the outer ring of the bearing is radially positioned; the stop vane bosses (2503) are used to hold the outer ring of the bearing to achieve axial positioning of the bearing (24). The outer ring of the bearing (24) contacts the stop blade boss (2503), and the inner ring of the bearing (24) contacts the blade boss (2303), thereby achieving axial positioning of the blade (23). The blade openings (2302) are evenly distributed around the center of the blade (23) and are the same in size and number as the stop blade openings (2502); the blade spline (2301) cooperates with the upper spline groove (2202) of the torsion bar spring to fix the lower torsion bar spring (22); The shoulder (2203) of the torsion bar spring (22) located at the top of the torsion bar spring (22) contacts the inner ring of the bearing (24) to position the bearing (24). The spline groove at the lower end of the torsion bar spring is engaged with the spline on the inner side of the torsion bar spring base to achieve axial positioning of the lower end of the torsion bar spring (22). The torsion bar spring base (21) is fixed by contacting and being pressed by the retaining ring (20); the retaining ring (20) and the overflow stabilizer housing (19) are connected by the overflow stabilizer retaining ring fixing thread (1906) and the retaining ring thread.

3. The adaptive flow rate component within the same injection and production well according to claim 2, characterized in that: The component also includes a cyclone separation module, which includes a cyclone separator base, a coupling and a cyclone separator (7). The hydrocyclone fixing seat is provided with coupling fixing thread (501), hydrocyclone fixing thread (502) and overflow module fixing thread (503). The coupling is provided with a coupling connection thread (601). The swirling fluid (7) is provided with a swirling fluid inlet (701), a swirling fluid underflow outlet (702), a swirling fluid overflow outlet (703), a swirling fluid upper end thread (704), and a swirling fluid lower end thread (705). The swirling fluid fixing seat is connected to the upper end thread (704) of the swirling fluid, the coupling connecting thread (601) and the lower end thread (1901) of the overflow stabilizer housing through the swirling fluid fixing thread (502), the coupling fixing thread (501) and the overflow module fixing thread (503) respectively; the lower end of the overflow stabilizer housing (19) is fixed on the swirling fluid fixing seat through the overflow stabilizer housing lower end thread (1901) and the overflow module fixing thread (503). The lower end thread (705) of the vortex fluid is connected to the radial inlet thread (807) of the bridge channel to fix the bottom end of the vortex fluid; The radial inlet thread (807) of the bridge channel is threaded to the lower end thread (705) of the swirling fluid.

4. A flow rate adaptive cyclone separator for injection and production wells in the same well, characterized in that: At least one set of the flow adaptive components described in claim 3 and the swirling tubing (4) are used to form a downhole swirling separator that can be connected to the same well injection and production process tubing; The swirling oil pipe is provided with an upper thread (401) and a lower thread (402); the swirling oil pipe (4) is connected and fixed to the coupling thread (601) and the upper internal thread of the bridge channel respectively through the upper thread (401) and the lower thread (402); the swirling fluid (7) is placed inside the swirling oil pipe (4); the upper internal thread of the bridge channel is threadedly connected to the lower thread (402) of the swirling oil pipe.

5. A tubing string for injection and production processes in the same well, characterized in that... The lower end of the process tubing is sequentially connected to the flow adaptive cyclone separator as described in claim 4; the upper end of the underflow flow adaptive module is connected to the lower end of the process tubing via a thread, and the lower end of the overflow flow adaptive module is connected to the pump unit via the variable diameter connection. After connection, the oil-water mixture enters through the variable diameter connection inlet (1301) and flows into the swirling oil pipe (4). After entering the swirling fluid (7) through the swirling fluid inlet (701), swirling separation begins. The water phase flows out from the bottom outlet (702) of the swirler, flows through the bottom flow adaptive module (1), and is discharged from the piston outlet (1202) of the stabilizer. The oil phase flows out from the overflow outlet (703) of the swirling fluid, flows through the overflow flow adaptive module (2), and is discharged from the outlet (1905) of the overflow stabilizer.

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