Electrically controlled fishing type wave code intelligent water distributor

Abstract

This invention provides an electrically controlled, drop-and-retrieve type intelligent water distributor, belonging to the field of oilfield development technology. The water distributor comprises a water injection outer shell and a water injection inner core. The water injection outer shell includes an upper connector, a locking outer cylinder, a sealing outer shell, a transition piece, a drainage sleeve, and a lower connector. The water injection inner core includes a locking and retrieval mechanism, a control and power supply system, and a valve body movement mechanism. This invention features a reasonable structural design and simple construction, and can be widely used in downhole stratified water injection wells in water-injection development oilfields. Due to the separate structure design of the water distributor, one set of water injection inner cores can inject water into multiple water injection outer shells, solving the problem of one-to-one correspondence between the water distributor and the water injection layer in existing stratified water injection technologies. This saves water injection equipment costs for oilfields, simplifies construction steps, and has broad market prospects.

Description

Technical Field

[0001] This invention relates to the field of oilfield development technology, specifically to an electrically controlled, drop-and-retrieve type wavecode intelligent water distributor. Background Technology

[0002] As oil well development time increases, formation energy is continuously depleted, leading to a continuous decrease in formation pressure, significant degassing of underground crude oil, increased viscosity, and a substantial reduction in well production, sometimes even resulting in shutdown and the accumulation of large amounts of unrecoverable dead oil. To replenish formation energy deficits, maintain or increase formation pressure, and achieve high and stable oil production, water injection is currently the most economical and effective development method. However, because general water injection processes are prone to water migration along high-permeability layers, and water injection in medium- and low-permeability layers is difficult to be effective, the level of stratified water injection and monitoring technology is crucial for achieving effective water injection across multiple oil layers, determining the effectiveness of water drive development and, consequently, the lifespan of the oil field. Traditional stratified water injection processes require water distributors to correspond one-to-one with the injection layers, resulting in high equipment costs and complex construction. Summary of the Invention

[0003] The purpose of this invention is to provide an electrically controlled, drop-and-retrieve type intelligent water distributor to solve the problem of one-to-one correspondence between the water distributor and the water injection layer in the existing water injection technology mentioned in the background art, thereby saving water injection equipment costs for oil fields.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an electrically controlled, release-and-retrieve type intelligent water distributor. The water distributor comprises a water-injection outer shell and a water-injection inner core. The water-injection outer shell comprises an upper connector, a locking outer cylinder, a sealing outer shell, a transition piece, a drainage sleeve, and a lower connector. The upper connector is threadedly connected to the upper end of the locking outer cylinder; the lower end of the locking outer cylinder is threadedly connected to the upper end of the sealing outer shell; the lower end of the sealing outer shell is threadedly connected to the upper end of the transition piece; the lower end of the transition piece is threadedly connected to the upper end of the drainage sleeve; and the lower end of the drainage sleeve is threadedly connected to the lower connector. The water-injection inner core comprises a locking and retrieval mechanism, a control and power supply system, and a valve body movement mechanism. The locking and retrieval mechanism comprises a retrieval rod, a retrieval neck, a locking inner cylinder, and a locking block. The control and power supply system comprises an electronic control chamber, a pressure sensor, a circuit board, and a battery. The valve body moving mechanism includes a motor cavity, a high-temperature resistant geared motor, a valve core housing, a coupling, a transmission screw, a guide screw, a shaft sleeve, a shaft connecting sleeve, a sealing seat, a dynamic seal, a dynamic seal gland, a valve head, a valve seat, and a valve seat sleeve.

[0005] One end of the upper connecting rod block is connected to the locking inner cylinder pin, and the other end of the upper connecting rod block is connected to the lower connecting rod block. The lower end of the lower connecting rod block is connected to the locking block with a pin to form a linkage mechanism. The locking block is connected to the retrieval rod through a trapezoidal thread. The retrieval rod is fixed to the locking inner cylinder through the retrieval neck. The locking inner cylinder is threaded to the electric control cavity. The retrieval neck is threaded to the locking inner cylinder.

[0006] The lower end of the electronic control cavity and the upper end of the motor cavity are connected by threads to form a hollow cavity. The circuit board and battery are built into the hollow cavity and are electrically connected to the pressure sensor. The pressure sensor is fixed to the motor cavity by threads. The motor cavity is provided with a pressure-through hole. The pressure sensor, circuit board and battery monitor the pressure wave changes and control the motor rotation.

[0007] The motor cavity is sealed by a sealing ring that mates with the inner wall sealing surface of the sealing shell. The sealing ring is located between the motor cavity and the inner wall of the sealing shell, and on both sides below the pressure-through hole. The pressure-through hole is located on the sealing shell. The valve seat sleeve is sealed by a sealing ring that mates with the inner wall sealing surface of the drain sleeve. The sealing ring is located between the valve seat sleeve and the inner wall of the drain sleeve, and on both sides below the water injection hole. The lower end of the valve core housing is threadedly connected to the upper end of the valve seat sleeve to form the valve core cavity. The high-temperature resistant geared motor is fixed to the shaft connecting sleeve by a pin. The lower end of the motor cavity is threadedly connected to the upper end of the valve core housing, and the lower end of the valve core housing is threadedly connected to the upper end of the valve seat sleeve to form the valve core cavity. The valve body movement mechanism is placed in the cavity. The lower end of the shaft connecting sleeve is threadedly connected to the upper end of the shaft outer sleeve, and the lower end of the shaft outer sleeve is threadedly connected to the upper end of the sealing seat. The valve seat is placed in the mounting hole at the lower end of the sealing seat to form the shaft cavity. The transmission shaft is placed in the cavity. The upper end of the transmission screw is inserted into the lower mounting hole of the coupling, and the lower output shaft of the high-temperature resistant geared motor is inserted into the upper mounting hole of the coupling, thus connecting the output shaft of the high-temperature resistant geared motor, the transmission screw, and the coupling into a single unit for transmitting the knob. The transmission screw and the guide screw are a trapezoidal thread pair, and the upper end of the valve head is threadedly connected to the lower end of the guide screw, forming the transmission shaft system. The dynamic seal is placed in the lower mounting hole of the sealing seat, and the dynamic seal gland is threadedly connected to the lower end of the sealing seat to press the dynamic seal. The transmission shaft system, shaft cavity, dynamic seal, and dynamic seal gland constitute the valve body movement mechanism.

[0008] Preferably, the design of the water-injection outer shell and the water-injection inner core allows one set of water-injection inner cores to be used to inject water into multiple water-injection outer shells. By rotating the retrieval rod of the retrieval device, the locking block expands or contracts, completing the locking action at the target position or the unlocking action.

[0009] Preferably, the control and power supply system is equipped with a pressure sensor, circuit board and battery to monitor pressure wave changes and control motor rotation to open or close the valve port.

[0010] Preferably, when the high-temperature resistant geared motor rotates, the valve body motion mechanism guides the linear motion of the guide screw through a trapezoidal connecting pair. The guide screw is connected to the valve head through a thread to open or close the valve port.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This invention features a reasonable structural design and simple construction, and can be widely used in downhole stratified water injection wells in water-injection development oilfields. Because the water distributor adopts a separate structural design, one set of water injection inner cores can inject water into multiple water injection outer shells, solving the problem of one-to-one correspondence between the water distributor and the water injection layer in existing stratified water injection technologies. This saves water injection equipment costs for oilfields, simplifies construction steps, and has broad market prospects. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the water distributor's inner core being fixed inside the outer shell, as described in an embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the water-filled inner core structure, as shown in the embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the water-filled outer shell structure, as shown in the embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of a partial position of the locking inner cylinder according to the present invention;

[0018] Figure 5 This is a schematic diagram showing the position of the water valve of the present invention when it is fully open;

[0019] Figure 6 This is a schematic diagram showing the position of the water valve of the present invention when it is fully closed.

[0020] The numbers in the diagram are explained as follows: 1. Upper connector; 2. Locking outer cylinder; 3. Retrieval rod; 4. Retrieval neck; 5. Locking inner cylinder; 6. Locking block; 7. Electrical control cavity; 8. Sealing shell; 9. Pressure sensor; 10. Motor cavity; 11. High-temperature resistant geared motor; 12. Valve core housing; 13. Transition piece; 14. Drain sleeve; 15. Valve seat sleeve; 16. Lower connector; 17. Valve seat; 18. Sealing seat; 19. Valve head; 20. Dynamic sealing gland; 21. Dynamic seal; 22. Shaft sleeve; 23. Guide screw; 24. Transmission screw; 25. Coupling; 26. Shaft connecting sleeve; 27. Circuit board and battery; 28. Upper connecting rod block; 29. ​​Lower connecting rod block; 30. Water injection hole; 31. Pressure venting hole. Detailed Implementation

[0021] To further understand the invention, the invention will be described in detail below with reference to the accompanying drawings and embodiments:

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] like Figures 1-6 As shown, the present invention provides a technical solution: an electronically controlled launch and retrieval type wave code intelligent water distributor, comprising: a water injection shell and a water injection inner core, the water injection shell being provided with an upper connector (1), a locking outer cylinder (2), a sealing shell (8), a transition piece (13), a drain sleeve (14), and a lower connector (16), the various components being screwed together to form a cavity, wherein the drain sleeve (14) is provided with a water injection hole (30);

[0025] The water-injection core is equipped with a locking and retrieval mechanism, a control and power supply system, and a valve body movement mechanism;

[0026] The locking and retrieval mechanism is provided with a retrieval rod (3), a retrieval neck (4), a locking inner cylinder (5), a locking block (6), an upper connecting rod block (28), and a lower connecting rod block (29). The upper connecting rod block (28) is connected to the locking inner cylinder (5) and the lower connecting rod block (29) by pins at both ends. The lower connecting rod block (29) is connected to the locking block (6) by pins at the lower end to form a linkage mechanism. The locking block (6) is connected to the retrieval rod (3) by trapezoidal thread. The retrieval rod (3) is fixed to the locking inner cylinder (5) by the retrieval neck (4). The locking inner cylinder (5) is threaded to the electrical control cavity (7). The retrieval neck (4) is threaded to the locking inner cylinder (5).

[0027] The control and power supply system includes an electrical control cavity (7), a pressure sensor (9), a circuit board, and a battery (27); the lower end of the electrical control cavity (7) is connected to the upper end of the motor cavity (10) by a thread to form a hollow cavity. The circuit board and battery (27) are built into the hollow cavity and connected to the pressure sensor (9). The pressure sensor (9) is fixed to the motor cavity (10) by a thread. The motor cavity (10) is provided with a pressure-penetrating hole (30). The pressure sensor (9), the circuit board, and the battery (27) monitor the pressure wave changes and control the motor rotation.

[0028] The valve body motion mechanism includes a motor cavity (10), a high-temperature resistant geared motor (11), a valve core housing (12), a coupling (25), a transmission screw (24), a guide screw (23), a shaft sleeve (22), a shaft connecting sleeve (26), a sealing seat (18), a dynamic seal (21), a dynamic seal gland (20), a valve head (19), a valve seat (17), and a valve seat sleeve (15). The motor cavity (10) is sealed by a sealing ring mating with the inner wall sealing surface of the sealing housing (8). The sealing ring is located below the sealing housing (8), and the pressure-permeable hole (30) is located on the sealing housing (8). The valve seat sleeve (15) is sealed by a sealing ring mating with the inner wall sealing surface of the drain sleeve (14). Below the drain sleeve (14), the valve seat (17) and the upper end of the valve seat sleeve (15) are threaded together to form a valve core cavity. The high-temperature resistant geared motor (11) is fixed on the shaft connecting sleeve (26) by a pin. The lower end of the motor cavity (10) is threaded to the upper end of the valve core housing (12). The lower end of the valve core housing (12) is threaded to the upper end of the valve seat sleeve (15) to form a valve core cavity. The valve body movement mechanism is placed in the cavity. The lower end of the shaft connecting sleeve (26) is threaded to the upper end of the shaft sleeve (22). The lower end of the shaft sleeve (22) is threaded to the upper end of the sealing seat (18). The valve seat (17) is placed in the mounting hole at the lower end of the sealing seat (18) to form a shaft cavity. The transmission shaft is placed in the cavity. The upper end of the transmission screw (24) is inserted into the mounting hole at the lower end of the coupling (25), and the lower output shaft of the high-temperature geared motor (11) is inserted into the mounting hole at the upper end of the coupling (25), so that the output shaft of the high-temperature geared motor (11), the transmission screw (24), and the coupling (25) are connected as a whole to transmit the knob. The transmission screw (24) and the guide screw (23) are a trapezoidal thread pair. The upper end of the valve head (19) is threadedly connected to the lower end of the guide screw (23) to form a transmission shaft system. The dynamic seal (21) is placed in the mounting hole at the lower end of the sealing seat (18), and the dynamic seal cover (20) is threadedly connected to the lower end of the sealing seat (18) to press the dynamic seal (21). The transmission shaft system, the shaft cavity, the dynamic seal (21), and the dynamic seal cover (20) constitute the valve body movement mechanism.

[0029] Example 1:

[0030] like Figure 1-4As shown, a separate structure design for the water injection shell and the water injection core is adopted. The water injection shell can be lowered into the well to a designated position with the tubing string. Multiple water injection shells can be connected in series in one tubing string. The water injection core is deployed into the water injection shell using a deployment tool and locked for water injection. After the target water injection layer is completed, the locking of the water injection core is released using the deployment tool, and the water injection core can be moved to the next target water injection layer to continue water injection, achieving the purpose of one set of water injection cores being used for water injection in multiple water injection shells. The locking or unlocking is achieved by rotating the deployment tool with the retrieval rod (3). The trapezoidal threaded pair on the retrieval rod (3) and the locking block (6) converts the rotational motion into the linear motion of the locking block (6). Since the locking block (6), the upper connecting rod block (28), and the lower connecting rod block (29) are a linkage mechanism, when the locking block (6) moves linearly, the upper connecting rod block (28) and the lower connecting rod block (29) will automatically expand or contract to complete the locking or unlocking.

[0031] like Figure 5 and Figure 6 As shown, the control and power supply system monitors pressure wave changes through a pressure sensor (9), a circuit board, and a battery (27), and controls the high-temperature resistant geared motor (11) to rotate, driving the transmission screw (24) to rotate. The transmission screw (24) and the guide screw (23) are a trapezoidal thread pair. When the guide screw (23) rotates with the transmission screw (24), it moves upward and opens the valve port. When the valve body moves to the uppermost position, the opening degree is 100%, and the water valve is fully open. The guide screw (23) can move downward with the transmission screw (24) and begin to close the valve port. When the valve body moves to the lowermost position, the opening degree is 0%, and the water valve is fully closed.

[0032] Working principle of this invention: The water injection shell is threaded onto the tubing string via upper and lower connectors and lowered to the target location in the well. The water injection core is deployed using a deployment and retrieval device. After deployment, a pressure sensor pre-installed in the motor cavity monitors downhole pressure changes in real time. When the surface equipment emits a specific pressure wave signal, the pressure sensor detects the signal and converts it into signal data, which is transmitted to the circuit board. The circuit board compares the data; if the signal data matches the pre-installed data, it energizes the high-temperature geared motor, controlling it to rotate forward or backward, thus rotating the transmission screw. The transmission screw and guide screw are a trapezoidal thread pair. Under the action of the guide pin, the guide screw can move upward or downward with the rotation of the transmission screw, opening or closing the valve port. The motor cavity is equipped with a sealing ring that cooperates with the sealing surface of the inner wall of the sealing shell to seal both sides of the pressure-through hole. The pressure-through hole is located on the sealing shell. The pressure sensor detects the downhole pressure in real time through the pressure-through hole. The valve seat is equipped with a sealing ring that cooperates with the sealing surface of the inner wall of the drainage sleeve to seal both sides of the water injection hole. The water injection hole is located on the drainage sleeve to ensure that the injected water does not flow out of the water injection layer.

[0033] Finally, it should be noted that: the foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all changes falling within the meaning and scope of the equivalents of the claims be included within the present invention, and no reference numerals in the claims should be regarded as limiting the scope of the claims.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electrically controlled drop-and-fish wave code intelligent water distributor, characterized in that, The device includes a water-filling outer shell and a water-filling inner core. The water-filling outer shell is provided with an upper connector (1), a locking outer cylinder (2), a sealing outer shell (8), a transition piece (13), a drain sleeve (14), and a lower connector (16). The upper connector (1) is threadedly connected to the upper end of the locking outer cylinder (2), the lower end of the locking outer cylinder (2) is threadedly connected to the upper end of the sealing outer shell (8), the lower end of the sealing outer shell (8) is threadedly connected to the upper end of the transition piece (13), the lower end of the transition piece (13) is threadedly connected to the upper end of the drain sleeve (14), and the lower end of the drain sleeve (14) is threadedly connected to the lower connector (16). The drain sleeve (14) is provided with a water-filling hole (30). The upper connector (1), the locking outer cylinder (2), the sealing outer shell (8), the transition piece (13), the drain sleeve (14), and the lower connector (16) are threaded together to form a cavity. The water-injection core is equipped with a locking and retrieval mechanism, a control and power supply system, and a valve body movement mechanism; The locking and retrieval mechanism is provided with a retrieval rod (3), a retrieval neck (4), a locking inner cylinder (5), a locking block (6), an upper connecting rod block (28), and a lower connecting rod block (29). One end of the upper connecting rod block (28) is connected to the locking inner cylinder (5) by a pin, and the other end of the upper connecting rod block (28) is connected to the lower connecting rod block (29) by a pin. The lower end of the lower connecting rod block (29) is connected to the locking block (6) by a pin to form a linkage mechanism. The locking block (6) is connected to the retrieval rod (3) by a trapezoidal thread. The retrieval rod (3) is fixed to the locking inner cylinder (5) by the retrieval neck (4). The locking inner cylinder (5) is threadedly connected to the electrical control cavity (7). The retrieval neck (4) is threadedly connected to the locking inner cylinder (5). The control and power supply system includes an electrical control cavity (7), a pressure sensor (9), a circuit board, and a battery (27). The lower end of the electrical control cavity (7) is connected to the upper end of the motor cavity (10) by a thread to form a hollow cavity. The circuit board and battery (27) are built into the hollow cavity and connected to the pressure sensor (9). The pressure sensor (9) is fixed to the motor cavity (10) by a thread. The motor cavity (10) is provided with a pressure-penetrating hole (31). The pressure sensor (9), the circuit board, and the battery (27) monitor the pressure wave changes and control the motor rotation. The valve body motion mechanism includes a motor cavity (10), a high-temperature resistant geared motor (11), a valve core housing (12), a coupling (25), a transmission screw (24), a guide screw (23), a shaft sleeve (22), a shaft connecting sleeve (26), a sealing seat (18), a dynamic seal (21), a dynamic seal gland (20), a valve head (19), a valve seat (17), and a valve seat sleeve (15). The motor cavity (10) is sealed by a sealing ring mating with the inner wall sealing surface of the sealing housing (8). The pressure-penetrating hole (31) is provided with... The valve core cavity is formed by the valve seat (15) being placed on the sealed outer shell (8); the valve seat sleeve (15) is sealed by the sealing ring and the inner wall sealing surface of the drain sleeve (14); the valve seat (17) is threadedly connected to the upper end of the valve seat sleeve (15); the high temperature resistant geared motor (11) is fixed to the shaft connecting sleeve (26) by a pin; the lower end of the motor cavity (10) is threadedly connected to the upper end of the valve core housing (12); the lower end of the valve core housing (12) is threadedly connected to the upper end of the valve seat sleeve (15) to form the valve core cavity; the valve body movement mechanism is placed in the cavity. The lower end of the shaft connecting sleeve (26) is threaded to the upper end of the shaft sleeve (22), and the lower end of the shaft sleeve (22) is threaded to the upper end of the sealing seat (18). The valve seat (17) is placed in the mounting hole at the lower end of the sealing seat (18) to form a shaft cavity, and the transmission shaft is placed in the cavity. The upper end of the transmission screw (24) is inserted into the mounting hole at the lower end of the coupling (25), and the lower output shaft of the high-temperature geared motor (11) is inserted into the mounting hole at the upper end of the coupling (25), so that the output shaft of the high-temperature geared motor (11) and the transmission screw ( 24), the coupling (25) is connected as a transmission knob, the transmission screw (24) and the guide screw (23) are trapezoidal thread pairs, the upper end of the valve head (19) is threadedly connected to the lower end of the guide screw (23) to form a transmission shaft system; the dynamic seal (21) is placed in the mounting hole at the lower end of the sealing seat (18), and the dynamic seal cover (20) is threadedly connected to the lower end of the sealing seat (18) to press the dynamic seal (21); the transmission shaft system, shaft cavity, dynamic seal (21), and dynamic seal cover (20) form the valve body movement mechanism.

2. The electrically controlled drop-and-fish type wave code intelligent water distributor according to claim 1, characterized in that, The aforementioned design of separating the water-filling outer shell and the water-filling inner core allows one set of water-filling inner cores to be used to fill multiple water-filling outer shells.

3. The electrically controlled, release-and-retrieve type intelligent water distributor according to claim 1, characterized in that, The control and power supply system is equipped with a pressure sensor (9) and a circuit board and battery (27) to monitor pressure wave changes and control motor rotation, and open or close valve ports.

4. The electrically controlled, release-and-retrieve type intelligent water distributor according to claim 1, characterized in that, The high-temperature resistant geared motor (11) rotates forward or in reverse to drive the transmission screw (24) to rotate. The transmission screw (24) and the guide screw (23) are trapezoidal thread pairs. Under the action of the guide pin, the guide screw can move up or down with the rotation of the transmission screw (24) to open or close the valve port.

5. The electrically controlled, release-and-retrieve type intelligent water distributor according to claim 1, characterized in that, A sealing ring is provided between the motor cavity (10) and the inner wall of the sealing shell (8).

6. The electrically controlled, release-and-retrieve type intelligent water distributor according to claim 1, characterized in that, A sealing ring is provided between the inner walls of the valve seat sleeve (15) and the drain sleeve (14).

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