An interactive intelligent sub-sampling system under a pump and an implementation method thereof

Abstract

The present application relates to the technical field of oil separation, more particularly to a pump-down interactive intelligent separation system and an implementation method thereof. Step one: sequentially connecting at least one production allocation device pack-off assembly, an electric energy interactive receiving end and a release anchor from bottom to top through a pipe column; step two: sealing the packer at the wellhead by pressing, and sealing between each production layer; continuing to pressurize the wellhead, the release anchor anchors to achieve the anchoring of the production allocation pipe column, and then the release anchor is released to achieve the suspension of the production allocation pipe column, and the pipe column is released by lifting the release anchor; step three: sequentially connecting the electric energy interactive transmitting end, the electric submersible pump and the tubing telescopic regulator from bottom to top; with the slow lowering of the production pipe column, when the lowering position approaches the docking position of the electric energy interactive transmitting end and the electric energy interactive receiving end, the tubing telescopic regulator at the wellhead is adjusted by the ground controller to make the tubing at the wellhead have the completion length, and the suspended load of the pump hanging pipe column is controlled to meet the axial load that the electric submersible pump can bear.

Description

Technical Field

[0001] This invention relates to the field of oil extraction technology, and more specifically to an interactive intelligent extraction system under a pump and its implementation method. Background Technology

[0002] In traditional oil well production, separate production processes are crucial for enhancing oil recovery and optimizing production. These processes separate different producing layers within the well and allow for independent production control of each layer, enabling precise regulation of production output. However, traditional separate production systems suffer from the following technical bottlenecks and problems:

[0003] 1. Complex maintenance of downhole equipment: Traditional production systems typically require the entire production string, including the production distribution string, to be pulled out during pump inspection (i.e., maintenance or replacement of the oil pump). This process is not only time-consuming and labor-intensive, but also increases operating costs and construction risks.

[0004] 2. Limitations in power supply and communication technology: Traditional oil well production systems mostly use contact-based power supply and communication methods. This method is easily affected by factors such as mechanical wear and corrosion in the complex downhole environment, resulting in reduced reliability.

[0005] 3. Insufficient precision in production control: Traditional separate production systems have limited precision in controlling each production layer, making it difficult to achieve real-time monitoring and fine-tuning of parameters such as pressure, temperature, and flow rate. This limits the precise management of oil well production dynamics and prevents the full utilization of the production capacity of each production layer.

[0006] 4. Low level of intelligence: Traditional oilfield production systems lack intelligent remote monitoring and data analysis functions, and cannot provide effective data support for the refined management of oilfields and subsequent profile control. Summary of the Invention

[0007] This invention provides an interactive intelligent sampling system under a pump and its implementation method, including the following technical solutions:

[0008] A smart production dispenser includes a first housing with a first sealed cavity inside. A hollow torque motor, an outer magnetic ring, and a ring-shaped permanent magnet are arranged from top to bottom within the first sealed cavity. The output shaft of the hollow torque motor is driven by the outer magnetic ring. A ball valve core is rotatably connected to the inner wall of the first housing. The ring-shaped permanent magnet is fixed to the top of the ball valve core, and the outer magnetic ring and the ring-shaped permanent magnet are magnetically driven. A through hole is provided on the first housing. When the radial through hole of the ball valve core is connected to the through hole on the first housing, the smart production dispenser opens the valve. When the radial through hole of the ball valve core is completely misaligned with the through hole on the housing, the smart production dispenser closes the valve.

[0009] The first outer casing includes a female connector, a steel pipe cable connector assembly fixed to the female connector, a power chamber housing fixed below the female connector, a liquid-passing central pipe fixed to the inner wall of the female connector, a dispenser connector fixed below the power chamber housing, a valve body fixing seat fixed below the dispenser connector, and a male connector fixed below the valve body fixing seat. The female connector, power chamber housing, liquid-passing central pipe, and dispenser connector form the annular first sealing cavity. The through hole on the ball valve sealing seat is connected to the through hole on the first outer casing. A sealing ring is provided between the spherical outer wall of the ball valve core and the ball valve sealing seat. When the radial through hole of the spherical outer wall of the ball valve core is connected to the ball valve sealing seat, it is in the open valve state. After the radial through hole of the ball valve core is completely misaligned with the through hole on the ball valve sealing seat, the through hole of the ball valve core is blocked by the valve body fixing seat to achieve closure.

[0010] An electrical energy interactive receiver includes a second housing, a central liquid passage distributed along an axis and a flow passage surrounding the central liquid passage, the upper and lower ends of the flow passage being connected to the central liquid passage, a magnetic ring and an outer interactive coil being embedded from top to bottom inside the second housing, and a locking part located below the outer interactive coil and connected to the central liquid passage being fixed inside the second housing.

[0011] The second housing includes: a drop-off connector, a liquid-filled housing fixed below the drop-off connector, an external interactive coil seat threadedly connected to the inner wall of the lower part of the drop-off connector, a magnetic ring embedded in the cross-section where the drop-off connector and the external interactive coil seat mate, a male threaded connector fixed below the liquid-filled housing, a circuit board cavity housing fixed above the male threaded connector, the upper part of the circuit board cavity housing fixed to the external interactive coil seat, an external interactive coil sheath fixed on the inner wall of the external interactive coil seat, and a cavity formed between the external interactive coil seat and the external interactive coil sheath for placing the external interactive coil; a circular flow channel is formed between the drop-off connector, the liquid-filled housing, the external interactive coil seat, the circuit board cavity housing, and the male threaded connector, and four first liquid-filled holes evenly distributed around the circumference of the drop-off connector, communicating with the circular flow channel; the upper and lower ends of the central liquid-filled pipe are respectively placed in the sealing groove of the external interactive coil seat and the sealing groove of the male threaded connector for fixation;

[0012] The positioning cone is placed in the positioning groove at the bottom of the outer interactive coil seat, and the top of the central liquid pipe and the outer interactive coil seat fix the positioning cone in place.

[0013] An electrical energy interactive transmitter includes a third housing, a fourth housing is threadedly connected to the third housing, and an inner interactive coil is fixed inside the fourth housing.

[0014] The third housing includes a female buckle connector, a housing connecting section fixed below the female buckle connector, a fixed connecting seat fixed below the housing connecting section, an adjusting rod placed in the cavity formed by the female buckle connector, the housing connecting section, the fixed connecting seat, and the straightening seat, the adjusting rod being screwed into the protruding section of the inner wall of the housing connecting section via a trapezoidal thread, a circuit board housing fixed below the adjusting rod, an inner interactive coil seat fixed below the circuit board housing, and the third control circuit board and the position detection module placed in the sealed cavity formed by the adjusting rod, the circuit board housing, and the inner interactive coil seat;

[0015] An inner interactive coil sheath is fixed to the lower part of the inner interactive coil base, and a conical guide head is fixed to the lower part of the inner interactive coil sheath. The inner interactive coil is located in the sealed cavity formed between the inner interactive coil base, the inner interactive coil sheath, and the conical guide head.

[0016] An interactive intelligent energy collection system under a pump includes an energy interaction receiver and an energy interaction transmitter. A third outer shell can enter the second outer shell to stop on the locking part, at which time the inner interaction coil is located inside the outer interaction coil.

[0017] Rotating the adjusting rod changes the total length of the connection section between the adjusting rod and the outer casing, which controls the misalignment distance between the outer and inner interactive coils.

[0018] A method for implementing interactive intelligent sampling under a pump includes the following steps:

[0019] Step 1: From bottom to top, install at least one production distribution device isolation assembly, an electrical energy receiving terminal, and a release anchor through the tubing; each production layer corresponds to one production distribution device isolation assembly, which is then sequentially lowered to the designed position along with the production distribution pipeline;

[0020] Step 2: After pressurizing the wellhead and setting the packer, the production layers are isolated. The wellhead is pressurized further, and the release anchor is released to anchor the production string. The release anchor is then released to suspend the production string. At this point, the release anchor is removed to release the string.

[0021] Step 3: Connect the power transmission transmitter, ESP, and tubing extension regulator sequentially from bottom to top. As the production tubing is slowly lowered, when it approaches the docking position between the power transmission transmitter and receiver, connect the power supply cable to the ground controller. The ground controller monitors the feedback of the arrival signal on the power transmission transmitter. Once the ground controller detects the signal, it adjusts the tubing extension regulator at the wellhead to ensure the tubing has the required completion length, while simultaneously controlling the suspension weight of the pump string to meet the axial load that the ESP can withstand.

[0022] Step 4: After well completion, production resumes. Based on the production capacity of each layer after each layer's rotation, the production capacity of each layer is assessed, and the intelligent production controller for each layer is adjusted through the ground controller.

[0023] Step 5: When pump testing is required, remove the pump hanger string. After the pump testing is completed, repeat the process of lowering a new pump hanger string, following the construction procedure in Step 3.

[0024] The beneficial effects of the pump-based interactive intelligent data collection system and its implementation method of the present invention are as follows:

[0025] This technology is applicable to oil well production processes using electric pumps and rod pumps. It allows for precise modulation of the intelligent production nozzles for each production layer via a ground controller, either remotely or online. The downhole power transmission and reception terminals utilize a non-contact power supply and communication method, enabling downhole pump inspections without moving the production string. Simply pull out the pump production string, and after inspection, the pump production string can be lowered again, reducing operational costs and achieving cost reduction and efficiency improvement.

[0026] The internal power exchange solution has an adjustable length function, is applicable to different lengths of drop anchors, and is suitable for downhole applications. At the same time, the power exchange transmitter is equipped with a guide cone and a straightening device, which can ensure reliable connection of several thousand meters of tubing in various well conditions such as deviated wells and vertical wells. It also allows production wells to be inspected without moving the production tubing, shortening the construction cycle, reducing construction costs, and achieving economic benefits such as cost reduction and efficiency improvement in oilfields.

[0027] This invention uses a tubing telescoping adjuster configured in the wellhead tubing string, which is applicable to pump-mounted tubing string completion operations with different lengths of drop anchors. At the same time, the suspension weight of the tubing string can be adjusted according to the axial force that different production pumps can withstand. The tubing telescoping adjuster has strong adaptability, is easy to operate, and improves construction efficiency.

[0028] This invention employs a hollow torque reducer motor used in an intelligent production distribution device. The hollow torque reducer motor has a thin-walled structure, which provides a larger central flow channel, making it suitable for high-volume production wells. At the same time, the concentric large diameter also facilitates the use of other tools such as central testing instruments, making it highly versatile. Furthermore, the intelligent production distribution device uses a non-contact magnetic transmission principle, reducing the use of sealing rings and lowering the risk of mechanical wear and leakage during long-term downhole operation. It also reduces the kinetic energy loss of the hollow torque reducer motor output, and the output torque can be controlled by adjusting the magnetic field strength or the air gap size.

[0029] The intelligent production mixer adopts a ball valve structure, which has low opening resistance, improves the working efficiency of the hollow torque motor output torque, and can improve the ability to overcome long-term downhole scaling, waxing, sand blockage, etc., ensuring the long-term reliable service life of the intelligent production mixer downhole.

[0030] When the intelligent production controller closes its valve, it can detect the formation recovery pressure; when it opens its valve, it can detect the production flow pressure. By monitoring changes in internal and external pressures, the pressure curve can be recovered. The pressure curve can be used to determine formation energy storage, interlayer interference, and interlayer isolation verification, providing data support for subsequent fine-tuning of the oilfield.

[0031] The ground controller is equipped with a remote transmission module, which can be controlled remotely or online. The ground controller can achieve precise control of the opening of the regulating valve of the intelligent production controller for each production layer in the well. At the same time, it can monitor formation parameters such as pressure, temperature and flow rate of each production layer in the well, and can realize rapid curve playback of data, which can provide data support for subsequent formation profile control.

[0032] The power interaction transmitter and receiver employ both single-coil interaction and wireless radio frequency (RF) communication methods. The RF communication distance is greater than the misalignment distance of the single-coil interaction, ensuring that even when a large overhead load occurs during downhole production, causing the power interaction transmitter and receiver to exceed the misalignment distance, communication can still be maintained via the RF module. This adapts to different downhole power loads, different production pump axial loads, and different release anchor applications, broadening the tool's applicability in various well conditions. Attached Figure Description

[0033] Figure 1 This is a diagram of the pump-driven interactive intelligent sampling system of the present invention.

[0034] Figure 2 This is a schematic diagram of the intelligent production dispenser structure of the present invention;

[0035] Figure 3 This is a schematic diagram of the power interaction receiver structure of the present invention;

[0036] Figure 4 A partial enlarged view of the power exchange receiver;

[0037] Figure 5 This is a schematic diagram of the power interaction transmitter structure of the present invention;

[0038] Figure 6 Enlarged view of a portion of the power transmission terminal;

[0039] Figure 7 This is a schematic diagram of the oil pipe expansion joint regulator structure of the present invention;

[0040] Figure 8 This is a schematic diagram of the lowered production column of the present invention. Figure 1 ;

[0041] Figure 9 This is a schematic diagram of the drop-off tubing of the present invention;

[0042] Figure 10This is a schematic diagram of the lowered production column of the present invention. Figure 2 ;

[0043] Figure 11 This is a schematic diagram of the tubing string after well completion according to the present invention;

[0044] Figure 12 Schematic diagram of the interaction distance between inner and outer coils;

[0045] Figure 13 System communication principle block diagram.

[0046] In the diagram: Intelligent production dispenser 1, first steel pipe cable connector assembly 101, female buckle connector 102, pressure sensor 103, power chamber housing 104, flow meter module 105, first control circuit board 106, liquid-passing center pipe 107, hollow torque motor 108, output spline 109, outer magnetic ring 110, production dispenser connector 111, ball valve core 112, valve body fixing seat 113, ball valve sealing seat 114, male buckle connector 115, power interaction receiver 2, release connector 201, magnetic ring 202, liquid-passing housing 203, external interaction coil seat 204, external interaction coil 205, external interaction coil sheath 206, positioning cone seat 207, circuit board cavity housing 208, second control... The components include: circuit board 209, central liquid pipe 210, male connector 211, second steel pipe cable sealing assembly 212, first wireless communication module 213, power exchange transmitter 3, female connector 301, outer shell connecting section 302, fixed connecting seat 303, straightening seat 304, adjusting rod 305, third control circuit board 306, circuit board shell 307, position detection module 308, inner interactive coil seat 309, coil sheath 310, B11 conical guide head 311, B12 third steel pipe cable sealing assembly 312, inner interactive coil 313, second wireless communication module 314, oil pipe telescopic adjuster 4, female shell 401, adjusting screw 402, and male connector 403. Detailed Implementation

[0047] A method for implementing interactive intelligent sampling under a pump includes the following steps:

[0048] Step 1: After the well cleaning and flushing operations are completed, the plug, at least one production packer assembly, power receiver 2, and release anchor are connected sequentially from bottom to top through the production pipeline; each production layer corresponds to one production packer assembly, which is lowered to the designed position along with the production pipeline.

[0049] The production distribution unit includes a lower intelligent production distribution unit 1 and a packer connected above the intelligent production distribution unit 1. The intelligent production distribution units 1 of each production layer are connected by steel pipe cables, and the uppermost intelligent production distribution unit 1 is connected to the power interaction receiver 2 by steel pipe cables.

[0050] Step 2: After pressurizing the wellhead with a pump truck and setting the packer, the production layers are isolated. The wellhead pump truck continues to pressurize, and the release anchor is released to anchor the production tubing. The release anchor is then released to suspend the production tubing. At this point, the release anchor is retrieved, thus releasing the tubing. The release anchor consists of two parts, with the anchoring structure at the bottom. After anchoring, the two parts separate. The anchoring structure is used to suspend the production tubing, while the upper anchoring part is retrieved with the tubing for easy lowering of the pump and hanging of the production tubing.

[0051] Step 3: Connect the power transmission transmitter 3, the electric submersible pump, and the tubing extension regulator 4 sequentially from bottom to top. As the production tubing is slowly lowered, when the lowered position approaches the docking position of the power transmission transmitter 3 and the power receiver 2, connect the power supply steel cable to the ground controller. The ground controller monitors the feedback of the arrival signal on the power transmission transmitter 3. After the ground controller detects the signal, it adjusts the wellhead tubing extension regulator 4 to ensure that the wellhead tubing has the completion length, while controlling the suspension weight of the pump string to meet the axial load that the electric submersible pump can withstand.

[0052] Step 4: After well completion, start the electric pump to resume production; based on the production capacity of each layer after each layer's rotation, conduct fine-tuning of the intelligent production distribution device 1 for each layer through the ground controller.

[0053] Step 5: When pump testing is required, simply remove the pump hanger string. After the pump testing is completed, repeat the process of lowering the new pump hanger string, following the construction procedure in Step 3.

[0054] The above-mentioned connections generally refer to detachable connections or fixed connections.

[0055] An interactive intelligent production system for pumps includes an intelligent production controller 1 placed at each production layer downhole for regulating the production volume of each layer; an electrical energy interactive receiver 2 connected to the uppermost intelligent production controller 1; an electrical energy interactive transmitter 3 that uses non-contact power supply and communication with the electrical energy interactive receiver 2; and a tubing extension regulator 4 placed at the wellhead tubing and connected to the production tubing. When the length of the release anchor changes, the length of the tubing extension regulator 4 is adjusted, thereby quickly adjusting the length of the wellhead tubing to facilitate well completion operations.

[0056] Specifically, the intelligent production dispenser 1 includes: a female connector 102, a steel pipe cable connector assembly 101 fixed on the female connector 102, a power chamber housing 104 threaded to the outer wall of the female connector 102, and a liquid-passing center pipe 107 fixedly sealed to the inner wall of the female connector 102.

[0057] To further explain, the cavity formed between the power chamber housing 104 and the liquid-passing central pipe 107 is equipped with two pressure sensors 103 arranged from top to bottom, as well as a flow meter module 105, a hollow torque motor 108, an output spline 109, and an outer magnetic ring 110.

[0058] Two pressure sensors 103 are fixed to the female connector 102, and the flow meter module 105 is fixed to the liquid flow center tube 107. One pressure sensor 103's probe extends to the inner wall of the female connector 102 to detect the internal flow channel pressure of the intelligent dispenser 1, while the other pressure sensor 103's probe extends to the outer wall of the female connector 102 to detect the external flow channel pressure of the intelligent dispenser 1. The flow meter module 105 uses an ultrasonic flow meter. When the product liquid passes through the liquid flow center tube 107, the flow velocity of the fluid can be calculated by measuring the time difference between the forward and reverse propagation of the ultrasonic waves in the fluid. The flow rate can then be measured using an algorithm. The flow rate test range of the intelligent dispenser 1 is 100–1500 m³ / h. 3 / d.

[0059] The first control circuit board 106 is located in the cavity formed between the power chamber housing 104 and the liquid-passing central tube 107. The first control circuit board 106 integrates a temperature detection unit. The first control circuit board 106 is used to power the hollow torque motor 108 and control its opening degree. At the same time, it detects parameters such as downhole temperature, pressure, flow rate, and valve opening degree, and uploads them to the surface intelligent controller.

[0060] The stator of the hollow torque motor 108 is fixed to the inner wall of the power chamber housing 104. The hollow torque motor 108 has a built-in hollow reduction gear to provide an output torque of not less than 140 N·m. At the same time, the rotor of the hollow torque motor 108 adopts a hollow thin-walled structure to reduce its volume and meet the requirements of concentric large-channel downhole tools. The output spline 109 is fixed to the output rotor end face of the hollow torque motor 108 by bolts. The output spline 109 is keyed to the outer magnetic ring 110 through its own protruding key, so that the hollow torque motor 108 can drive the outer magnetic ring 110 to perform circular motion around the axis of the liquid center tube 107.

[0061] The lower inner wall of the power chamber housing 104 is threaded with a production dispenser connector 111. The lower outer wall of the liquid-passing central tube 107 is embedded with a sealing ring that is pressed against the inner wall of the production dispenser connector 111. The outer magnetic ring 110 is located between the production dispenser connector 111 and the power chamber housing 104. The outer wall of the bottom of the liquid-passing central tube 107 and the outer wall of the upper part of the production dispenser connector 111 are sealed by the sealing ring.

[0062] A valve body fixing seat 113 is threadedly connected to the lower inner wall of the production dispenser connecting seat 111. Multiple liquid outlets are evenly distributed around the circumference of the valve body fixing seat 113. Each liquid outlet contains a ball valve sealing seat 114 fixedly connected to the valve body fixing seat 113. The ball valve sealing seat 114 communicates with the corresponding liquid outlet. The ball valve core 112 is placed inside the cavity formed by the production dispenser connecting seat 111 and the valve body fixing seat 113. A guide ring is embedded on each of the upper and lower sides of the outer wall of the ball valve core 112. The guide rings roll and rub against the valve body fixing seat 113, ensuring concentric cooperation between the ball valve core 112 and the valve body fixing seat 113, allowing for normal rotation of the valve core. The inner circumferential surface of the outer magnetic ring 110 is fixed to the outer ring of the bearing, while the inner ring of the bearing is fixed to the outer circumferential surface of the liquid-passing central tube 107. This allows the outer magnetic ring 110 to be rotatably connected to the outer wall of the liquid-passing central tube 107 via the bearing, ensuring that the outer magnetic ring 110 is concentric with the ball valve core 112. A male threaded connecting seat 115 is threaded onto the outer wall of the bottom of the valve body fixing seat 113.

[0063] A ring-shaped permanent magnet is fixed to the ball valve core 112 at the face-to-face position with the outer magnetic ring 110, enabling the outer magnetic ring 110 and the ball valve core 112 to operate on a magnetic transmission principle, transmitting torque through a magnetic field to achieve non-contact transmission. Preferably, a sealing ring is provided between the spherical outer wall of the ball valve core 112 and the ball valve sealing seat 114. When the radial through hole of the spherical outer wall of the ball valve core 112 is connected to the ball valve sealing seat 114, it is in the open valve state. When the radial through hole of the ball valve core 112 is misaligned with the ball valve sealing seat 114, the through hole of the ball valve core 112 is blocked by the valve body fixing seat 113 to achieve closure, which is the closed valve state. When the intelligent production controller 1 closes its valve, it can detect the formation recovery pressure; when the intelligent production controller 1 opens its valve, it can detect the production flow pressure. By monitoring changes in internal and external pressures, the pressure curve can be recovered. The pressure curve can be used to determine formation energy storage, interlayer interference, and interlayer isolation verification, providing data support for subsequent fine-tuning of the oilfield.

[0064] The minimum diameter of all parts inside the intelligent feeder 1 is the same, that is, the first central flow channel formed by the female connector 102, the liquid flow center pipe 107, the ball valve core 112 and the male connector 115 is a full-diameter structure.

[0065] The first steel pipe cable joint assembly 101 is fixed on the female connector 102 and the male connector 115 to achieve the sealing and fixing of the steel pipe cable and to complete the power supply and communication of the downhole multi-layer production device.

[0066] The power interaction receiver 2 includes a drop-off connector 201. A liquid-filled outer shell 203 is threadedly connected to the lower outer wall of the drop-off connector 201. An external interaction coil holder 204 is threadedly connected to the lower inner wall of the drop-off connector 201. A magnetic ring 202 is embedded within the external interaction coil holder 204 at the interface where the drop-off connector 201 and the external interaction coil holder 204 mate. A male threaded connector 211 is threadedly connected to the upper outer wall of the male threaded connector 211. A circuit board cavity shell 208 is threadedly connected to the upper inner wall of the circuit board cavity shell 208, which is threadedly connected to the external interaction coil holder 204. An external interaction coil sheath 206 is fixed to the inner wall of the external interaction coil holder 204 by compression locking. A cavity is formed between the external interaction coil holder 204 and the external interaction coil sheath 206 for housing the external interaction coil 205.

[0067] A circular flow channel is formed between the release connector 201, the liquid-passing housing 203, the external interactive coil seat 204, the circuit board cavity housing 208, and the male threaded connector 211. Four first liquid-passing holes, communicating with the circular flow channel, are evenly distributed around the circumference of the release connector 201. The axis of each first liquid-passing hole forms an angle with the axis of the male threaded connector 211, the specific angle of which is machined according to actual needs. The purpose of this angle is to change the direction of the liquid flow channel, alter the erosion angle of the liquid against the outer housing, increase the erosion surface, and improve the erosion resistance of the housing. Four second liquid-passing holes, communicating with the circular flow channel, are evenly distributed around the circumference of the male threaded connector 211. The axis of each second liquid-passing hole forms an angle with the axis of the male threaded connector 211, for the same purpose as the first angle. The equivalent flow diameter of the first and second liquid-passing holes is not less than 62 mm.

[0068] The upper and lower ends of the central fluid passage pipe 210 are fixed within the sealing grooves of the outer interactive coil seat 204 and the male thread lower connector 211, respectively. Sealing ring structures are provided on both the upper and lower sides of the central fluid passage pipe 210 to ensure the sealing of the inner and outer cavities. The outer interactive coil seat 204, the central fluid passage pipe 210, and the male thread lower connector 211 form a central flow channel, which can reduce sand accumulation in the internal cavity of the outer interactive coil seat 204 and ensure the reliability of pump string tripping, pump inspection, and re-insertion.

[0069] The positioning cone seat 207, which serves as the locking part, is placed at the bottom positioning groove of the outer interactive coil seat 204. At the same time, the positioning cone seat 207 is provided with a through hole along the direction of the central liquid pipe 210 axis to ensure that the central liquid pipe can pass through. The top of the central liquid pipe 210 and the outer interactive coil seat 204 fix the positioning cone seat 207 by locking.

[0070] The second control circuit board 209 is housed within a sealed cavity formed by the outer interactive coil seat 204, the central liquid passage pipe 210, the male threaded connector 211, and the circuit board housing 208. The first wireless communication module 213 is positioned at the recessed mounting hole at the top of the male threaded connector 211, ensuring the reliability of the cable's communication and sealing. The second control circuit board 209 connects the magnetic ring 202, the outer interactive coil 205, and the first wireless communication module 213, enabling bidirectional signal and power transmission from the power interaction receiver 2.

[0071] The power exchange transmitter 3 includes a female connector 301. A housing connection section 302 is threadedly connected to the outer wall of the lower part of the female connector 301. A fixed connection seat 303 is threadedly connected to the inner wall of the lower side of the housing connection section 302. A centering seat 304 is threadedly connected to the outer wall of the lower part of the fixed connection seat 303. The centering seat 304 ensures that the power exchange transmitter 3 is concentric within the casing during the pump hanging and lowering process, improving the reliability of the connection between the power exchange transmitter 3 and the power exchange receiver 2.

[0072] The adjusting rod 305 is placed in the cavity formed by the female connector 301, the outer shell connecting section 302, the fixed connecting seat 303, and the straightening seat 304, and is screwed into the protruding section of the inner wall of the outer shell connecting section 302 through a trapezoidal thread. The inner wall of the straightening seat B4 is provided with a sealing ring structure that abuts against the outer wall of the adjusting rod 305, which can ensure the sealing of the inner cavity when the adjusting rod B5 is adjusted in length.

[0073] The lower outer wall of the adjusting rod 305 is threaded to the circuit board housing 307, and the lower inner wall of the circuit board housing 307 is threaded to the inner interactive coil seat 309. The third control circuit board 306 and the position detection module 308 are placed and fixed in the sealed cavity formed by the adjusting rod 305, the circuit board housing 307, and the inner interactive coil seat 309.

[0074] The position detection module 308 can realize position signal feedback when the inner and outer interactive cylinders are axially connected. Through signal feedback, the docking distance status of the inner and outer interactive cylinders in the well can be monitored in real time. The third circuit board 306 processes electrical energy and signals. It can transmit control commands to the power transmitter 3 and control the intelligent production distribution device 1 of each layer in the well to adjust the oil nozzle. It can also receive data such as temperature, pressure and flow rate between each oil layer in the well and transmit them back to the surface controller.

[0075] An inner interactive coil sheath 310 is threadedly connected to the lower outer wall of the inner interactive coil holder 309, and a tapered guide head 311 is threadedly connected to the lower inner wall of the inner interactive coil sheath 310. An inner interactive coil 313 is housed within the sealed cavity formed between the inner interactive coil holder 309, the inner interactive coil sheath 310, and the tapered guide head 311. A second wireless communication module 314 is housed inside the tapered guide head 311, used for wireless communication with the first wireless communication module 213 of the power interaction receiver 2. A third steel pipe cable sealing assembly 312 is fixed to the female connector 301, enabling sealing and fixing of the steel pipe cable.

[0076] The tapered guide head 311 has a large-angle cone on its outside, which can improve the reliability of docking of the inner transmitter 3 of the power interaction in various well conditions such as vertical wells and deviated wells. At the same time, the bottom of the tapered guide head 311 has a positioning cone hole, which is positioned with the positioning cone seat 207 inside the power interaction receiver 2 during docking, and plays a role in axial positioning of the inner receiver 2 of the power interaction. This can reduce the impact of vibration of the production pump on the power interaction transmitter 3 during production and improve its service life. At this time, the power interaction transmitter 3 and the power interaction receiver 2 are docked.

[0077] Combination Figures 10 to 12 When the outer interactive coil 205 and the inner interactive coil 313 are axially aligned, mutual transmission of electrical energy and communication can be achieved. By rotating the adjusting rod 305, the total length of the connecting section 302 between the adjusting rod 305 and the outer casing can be changed, thereby controlling the misalignment distance between the outer interactive coil 205 and the inner interactive coil 313. This allows for different power loads in the well and is suitable for the axial load capacity of different specifications of electric pumps in oil fields. The length of the outer interactive coil 205 is greater than the length of the inner interactive coil 313, which can meet the requirement of bidirectional transmission of electrical energy and signals within an axial misalignment distance of up to 200mm. It also allows for the use of different power loads in the well depending on the misalignment distance, demonstrating strong adaptability.

[0078] The magnetic ring 202 is used to provide a magnetic signal to the position detection module 308 of the power interaction transmitter 2.

[0079] The bottom cross section of the positioning cone seat 207 and the outer interactive coil seat 204 forms a W shape, which is used to achieve radial positioning after the electric energy interactive transmitter 3 and the electric energy interactive receiver 2 are docked, reduce the impact of vibration on the electric energy interactive transmitter 3 and the electric energy interactive receiver 2, and thus improve the service life of the inner electric energy interactive cylinder in the well.

[0080] The power exchange transmitter 3 can be lowered in two runs. The first run can be used for testing the tubing. It is lowered along with the release connection, which can realize the power supply and communication test of the downhole production tubing before and after packer setting, release anchor anchoring, and release, reducing the construction risk of the downhole production tubing. When the release anchor is released, it is pulled out with the tubing. The second run is lowered with the pump-mounted tubing to realize non-contact docking with the downhole power exchange receiver 2, providing power supply and communication for the production of the downhole production tubing.

[0081] The tubing expansion joint adjuster 4 includes a female housing 401. The top outer wall of the adjusting screw 402 is screwed into the inner wall of the female housing 401 via a trapezoidal thread. The top of the adjusting screw 402 rests against the interior of the female housing 401. The lower part of the female housing 401 extends to the lower side of the adjusting screw 402. The non-threaded section of the outer wall of the adjusting screw 402 has a sealing surface. This sealing surface ensures a seal between the adjusting screw 402 and the lower inner wall of the female housing 401. A sealing ring is embedded in the lower inner wall of the female housing 401 to improve the sealing performance and allows for circumferential and axial freedom between the lower part of the female housing 401 and the adjusting screw 402, enabling sliding between them. This ensures the sealing of the tubing string inside and outside within the adjustment range of the telescopic adjuster 4; the inner diameter of the tubing telescopic adjuster 4 is larger than the inner diameter of the tubing, which can allow logging tools or pump rods to pass through; the tubing telescopic adjuster 4 adopts a trapezoidal thread pair structure for length adjustment to achieve the self-locking function of the thread pair; it is applicable to the docking of pump hanging tubing strings with different release anchor lengths, and has strong adaptability.

Claims

1. A pump-based interactive intelligent data collection system, characterized in that, It includes intelligent production distribution devices placed at each production layer in the well, an energy interaction receiver connected to the uppermost intelligent production distribution device, and an energy interaction transmitter that uses non-contact power supply and communication with the energy interaction receiver. The power interaction receiver includes a second housing, inside which is provided a central liquid passage distributed along the axis and a flow passage surrounding the central liquid passage. The upper and lower ends of the flow passage are connected to the central liquid passage. A magnetic ring and an outer interaction coil are embedded from top to bottom inside the second housing. A locking part located below the outer interaction coil and connected to the central liquid passage is fixed inside the second housing. The power interaction transmitter includes a third housing, a fourth housing is threadedly connected to the third housing, and an inner interaction coil is fixed inside the fourth housing. The fourth housing can enter the second housing to stop on the locking part, at which time the inner interactive coil is located inside the outer interactive coil; The third housing includes a female upper connector, a housing connecting section fixed below the female upper connector, a fixed connecting seat fixed below the housing connecting section, a centering seat threaded to the outer wall of the lower part of the fixed connecting seat, an adjusting rod placed in the cavity formed by the female upper connector, the housing connecting section, the fixed connecting seat and the centering seat, the adjusting rod screwing into the protruding section of the inner wall of the housing connecting section through a trapezoidal thread, a circuit board housing fixed below the adjusting rod, an inner interactive coil seat fixed below the circuit board housing, and the third control circuit board and the position detection module placed in the sealed cavity formed by the adjusting rod, the circuit board housing and the inner interactive coil seat; An inner interactive coil sheath is fixed at the lower part of the inner interactive coil base, and a conical guide head is fixed at the lower part of the inner interactive coil sheath. The inner interactive coil is located in the sealed cavity formed between the inner interactive coil base, the inner interactive coil sheath, and the conical guide head. The power interaction transmitter and the power interaction receiver adopt two communication methods: single coil interaction and wireless radio frequency. The distance of wireless radio frequency communication is greater than the misalignment distance of single coil interaction.

2. The pump-based interactive intelligent data collection system according to claim 1, characterized in that, Rotating the adjusting rod changes the total length of the connection section between the adjusting rod and the outer casing, which can control the misalignment distance between the outer and inner interactive coils.

3. The pump-based interactive intelligent data collection system according to claim 1, characterized in that, The second housing includes: a drop-off connector, a liquid-filled housing fixed below the drop-off connector, an external interactive coil seat threadedly connected to the inner wall of the lower part of the drop-off connector, a magnetic ring embedded in the cross-section where the drop-off connector and the external interactive coil seat mate, a male threaded connector fixed below the liquid-filled housing, a circuit board cavity housing fixed above the male threaded connector, the upper part of the circuit board cavity housing fixed to the external interactive coil seat, an external interactive coil sheath fixed on the inner wall of the external interactive coil seat, and a cavity formed between the external interactive coil seat and the external interactive coil sheath for placing the external interactive coil; a circular flow channel is formed between the drop-off connector, the liquid-filled housing, the external interactive coil seat, the circuit board cavity housing, and the male threaded connector, and four first liquid-filled holes evenly distributed around the circumference of the drop-off connector, communicating with the circular flow channel; the upper and lower ends of the central liquid-filled pipe are respectively placed in the sealing groove of the external interactive coil seat and the sealing groove of the male threaded connector for fixation; The positioning cone is placed in the positioning groove at the bottom of the outer interactive coil seat, and the top of the central liquid pipe and the outer interactive coil seat fix the positioning cone seat in place. The bottom cross-section of the positioning cone and the outer interactive coil base forms a W shape, which is used to achieve radial positioning after the power interactive transmitter and the power interactive receiver are docked.

4. The pump-based interactive intelligent data collection system according to claim 1, characterized in that, The device includes an intelligent production distribution unit, comprising a first housing, within which a first sealed cavity is formed. A hollow torque motor and an outer magnetic ring are arranged from top to bottom within the first sealed cavity. The output shaft of the hollow torque motor is connected to the outer magnetic ring via a transmission connection. A ball valve core is rotatably connected to the inner wall of the first housing. An annular permanent magnet is fixed to the top of the ball valve core, and the outer magnetic ring is magnetically driven by the annular permanent magnet. A through hole is provided on the first housing. When the radial through hole of the ball valve core is connected to the through hole on the first housing, the intelligent production distribution unit opens the valve; when the radial through hole of the ball valve core is completely misaligned with the through hole on the housing, the intelligent production distribution unit closes the valve. The first outer shell includes a female buckle connector, a power chamber housing fixed below the female buckle connector, a liquid-passing central tube fixed to the inner wall of the female buckle connector, and a dispenser connector fixed below the power chamber housing. The female buckle connector, the power chamber housing, the liquid-passing central tube, and the dispenser connector form an annular first sealing cavity. The outer magnetic ring is connected to the outer wall of the liquid-passing center tube by a bearing rotation. The outer magnetic ring and the ball valve core transmit torque through the magnetic field to achieve non-contact transmission.

5. The pump-based interactive intelligent data collection system according to claim 4, characterized in that, The system includes a steel pipe cable connector assembly fixed on the female connector, a valve body fixing seat below the distributor connector, and a male connector fixed below the valve body fixing seat. The through hole on the ball valve sealing seat is connected to the through hole on the first outer shell. A sealing ring is provided between the spherical outer wall of the ball valve core and the ball valve sealing seat. When the radial through hole of the spherical outer wall of the ball valve core is connected to the ball valve sealing seat, the valve is in the open state. After the radial through hole of the ball valve core is completely misaligned with the through hole on the ball valve sealing seat, the through hole of the ball valve core is blocked by the valve body fixing seat to achieve closure.

6. A method for implementing interactive intelligent sampling under a pump, characterized in that, Using a pump-interactive intelligent data collection system as described in any one of claims 1 to 5 includes the following steps: Step 1: From bottom to top, install at least one production distribution device isolation assembly, an electrical energy receiving terminal, and a release anchor through the tubing; each production layer corresponds to one production distribution device isolation assembly, which is then sequentially lowered to the designed position along with the production distribution pipeline; Step 2: After pressurizing the wellhead and setting the packer, the production layers are isolated. The wellhead is pressurized further, and the release anchor is released to anchor the production string. The release anchor is then released to suspend the production string. At this point, the release anchor is removed to release the string. Step 3: Connect the power transmission transmitter, ESP, and tubing extension regulator sequentially from bottom to top. As the production tubing is slowly lowered, when it approaches the docking position between the power transmission transmitter and receiver, connect the power supply cable to the ground controller. The position detection module can provide position signal feedback when the power transmission transmitter and receiver are axially docked. Through signal feedback, the docking distance between the downhole power transmission transmitter and receiver can be monitored in real time. The ground controller monitors the feedback of the arrival signal on the power transmission transmitter. When the ground controller detects the signal, it adjusts the tubing extension regulator at the wellhead to ensure the tubing has the completion length, while controlling the suspension weight of the pump string to meet the axial load that the ESP can withstand.

7. The pump-based interactive intelligent sampling method according to claim 6 further includes the following steps: Step 4: After well completion, production resumes. Based on the production capacity of each layer after each layer's rotation, the production capacity of each layer is assessed, and the intelligent production controller for each layer is adjusted through the ground controller. Step 5: When pump testing is required, remove the pump hanger string. After the pump testing is completed, repeat the process of lowering a new pump hanger string, following the construction procedure in Step 3.

Images