Injection-production integrated flow control screen pipe and pipe column system

Abstract

The invention discloses an injection-production integrated flow control screen pipe and a pipe column system.The flow control screen pipe comprises an outer pipe, one end of the outer pipe is connected with the screen pipe, a connector is arranged in the outer pipe, the connector is provided with a flow channel communicating the inner side and the outer side of the connector, and the flow channel is provided with a first opening and closing assembly and a plurality of second opening and closing assemblies; the first opening and closing assembly drives and conducts a flow channel between the inner side of the connector and the second opening and closing assembly, pushes the second opening and closing assembly to conduct a flow channel between the first opening and closing assembly and the outer side of the connector, and enters a stratum from a screen pipe interlayer under the guide of the flow channel, so that integration of injection and extraction of a pipe column is achieved; the requirement for steam injection or other medium injection of part of oil and gas wells is met, the application range is widened, later operation is facilitated, workover fluid is effectively prevented from entering the stratum during workover operation when thermal recovery heavy oil wells are operated, cold damage and other pollution of the workover fluid to the stratum are avoided, applicability is high, and operation is reliable.

Description

Technical Field

[0001] The present application relates to the technical field of oil production, and in particular to an injection-production integrated flow control screen and pipe string system. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present disclosure. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present disclosure.

[0003] At present, the flow control screens and pipes in oil production technology mainly include ICD water control screens, AICD water control screens, etc., which achieve the purpose of water control and oil stabilization by adjusting the production profile. Among them, AICD water control screens are widely used because they have the characteristic of automatically adjusting the flow pressure difference according to the different viscosity of oil and water.

[0004] The core tool of AICD water control screen is AICD water control device, which mainly includes float plate type and flow channel type. The float plate type cannot realize injection function, and the flow channel type has small holes and high injection pressure. When the oil and gas well needs steam injection or other media injection in the later stage, this function cannot be realized. As a result, AICD water control pipe string has poor applicability for heavy oil thermal recovery wells or oil and gas wells with injection requirements in the later stage. Summary of the invention

[0005] In view of the defects existing in the prior art, the present application provides an injection-production integrated flow control screen and pipe string system to solve the problem that the AICD water control screen in the prior art has no injection function and poor applicability.

[0006] The above-mentioned purpose of the present application is mainly achieved through the following technical solutions:

[0007] An injection-production integrated flow control screen pipe, the flow control screen pipe comprising:

[0008] an outer tube, one end of which is used to connect to the screen tube;

[0009] A joint, the joint is fixedly connected in the outer tube, a sealing sleeve is provided on the inner side of the joint, a water control device is provided between the joint and the screen tube, a flow channel connecting the inner side and the outer side of the joint is provided on the joint, and a first opening and closing component and a plurality of second opening and closing components are provided on the flow channel;

[0010] The first opening and closing component is configured to open or close the flow channel between the inner side of the joint and the second opening and closing component;

[0011] The second opening and closing component is configured to open or close the flow channel between the first opening and closing component and the outside of the joint.

[0012] In an optional embodiment, the first opening and closing component includes a sealing rod that can reciprocate in the joint, the sealing rod is provided with a through hole, and when the sealing rod moves to the point where the through hole corresponds to the flow channel, the flow channel is connected between the first opening and closing.

[0013] In an optional embodiment, the first opening and closing assembly also includes a plug and a first elastic member, the plug is fixed on the joint, the first elastic member is connected between the sealing rod and the plug, and the first elastic member is used to push the sealing rod to move to a position where the through hole and the flow channel are misaligned.

[0014] In an optional embodiment, a first cavity is provided between one end of the sealing rod and the joint, and a first liquid that can absorb heat and expand is provided in the first cavity, so that the first liquid absorbs heat and expands, and pushes the sealing rod to a position corresponding to the through hole and the flow channel.

[0015] In an optional embodiment, the second opening and closing component includes a base and a connecting seat fixedly connected to the joint, an operating channel is provided in the second opening and closing component, and a reciprocating sealing head is provided on the base, and a second elastic member is provided on the sealing head for driving the sealing head to close the operating channel.

[0016] In an optional embodiment, the working channel includes a first through-hole provided on the base, an intermediate cavity provided between the base and the connecting seat, and a second through-hole provided on the connecting seat, and the second elastic member pushes the sealing head to block the second through-hole so that liquid or gas can push the sealing head to move through the second through-hole and enter the intermediate cavity and the first through-hole in turn.

[0017] In an optional embodiment, a step groove is provided on the joint, the connecting seat is threadedly connected in the step groove, and the step groove and the connecting seat are respectively provided with conical surfaces that abut against each other.

[0018] In an optional embodiment, the water control device is disposed between the joint and the screen tube via a water control joint, and the water control joint is threadedly connected to the joint and the screen tube respectively.

[0019] In an optional embodiment, a soluble sealing ring is provided at one end of the water control device close to the joint, and the soluble sealing ring can seal the water control device before dissolving.

[0020] Based on the same inventive concept, the present application also provides a tubing system, including the above-mentioned injection-production integrated flow control screen.

[0021] Compared with the prior art, the advantages of this application are:

[0022] The flow control screen pipe in the present application comprises an outer pipe connected to the screen pipe at one end, a joint is arranged in the outer pipe, a sealing sleeve is arranged on the inner side of the joint, a water control device is arranged between the joint and the screen pipe, a flow channel connecting the inner side and the outer side of the joint is arranged on the joint, a first opening and closing component and a plurality of second opening and closing components are arranged on the flow channel, the first opening and closing component is configured to conduct or close the flow channel between the inner side of the joint and the second opening and closing components, the second opening and closing components are configured to conduct or close the flow channel between the first opening and closing components and the outer side of the joint, when the formation needs to inject steam, the steam reaches the bottom of the well, and the first opening and closing component drives and conducts the flow between the inner side of the joint and the second opening and closing components The AICD water control device can be used to control the flow passage between the two components, and push the second opening and closing component to conduct the flow passage between the first opening and closing component and the outside of the joint, and enter the formation from the screen tube interlayer under the guidance of the flow passage, realizing the integration of pipe string injection and production, meeting the needs of steam injection or injection of other media in some oil and gas wells, expanding the application scope on the basis of the AICD water control device, facilitating later operations, and effectively preventing the workover fluid from entering the formation during the workover operation for thermal recovery of heavy oil wells, avoiding cold damage and other pollution to the formation by the workover fluid. The AICD water control pipe string has strong applicability and reliable operation when facing heavy oil thermal recovery wells or oil and gas wells with injection needs in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A partial cross-sectional view of a flow control screen provided in an embodiment of the present application;

[0025] Figure 2 Provide an embodiment of the present application Figure 1 A local enlarged schematic diagram in FIG.

[0026] Figure 3 A partial enlarged schematic diagram of a first opening and closing component is provided for an embodiment of the present application;

[0027] Figure 4 A partial enlarged schematic diagram of a second opening and closing component is provided for an embodiment of the present application;

[0028] In the figure: 100, outer tube; 200, joint; 201, step groove; 202, cone surface; 203, flow channel; 204, sealing sleeve; 300, first opening and closing component; 301, sealing rod; 302, through hole; 303, plug; 304, first elastic member; 305, first cavity; 400, second opening and closing component; 401, base; 402, connecting seat; 403, sealing head; 404, second elastic member; 405, first perforation; 406, middle cavity; 407, second perforation; 500, water control device; 501, soluble sealing ring; 502, water control joint; 600, screen tube. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0030] Figure 1 A partial cross-sectional view of a flow control screen provided in an embodiment of the present application; Figure 2 Provide an embodiment of the present application Figure 1 A local enlarged schematic diagram in FIG. Figure 3 A partial enlarged schematic diagram of a first opening and closing component is provided for an embodiment of the present application; Figure 4 A partially enlarged schematic diagram of a second opening and closing component is provided for an embodiment of the present application.

[0031] like Figure 1 As shown, an injection-production integrated flow control screen, in an optional embodiment, the flow control screen comprises an outer tube 100 and a joint 200, wherein:

[0032] One end of the outer tube 100 is used to connect the sieve tube 600. When the outer tube 100 is connected to the sieve tube 600, the stability of the connection position can be increased by setting a sieve tube 600 connector. When the sieve tube 600 connector is threadedly connected to the outer tube 100, repair welding can be performed on the edge of the connection position to increase reliability. The sieve tube 600 connector is fixedly connected to the sieve tube 600, and channels arranged at intervals along the circumferential direction are provided between the sieve tube 600 connector and the sieve tube 600, so that the connection can be maintained stable while achieving communication with the outer bottom layer, and a plurality of sealing rings arranged at intervals are provided between the sieve tube 600 connector and the sieve tube 600 to improve the sealing of the connection.

[0033] The joint 200 is fixedly connected in the outer tube 100, a sealing sleeve 204 is provided on the inner side of the joint 200, a water control device 500 is provided between the joint 200 and the screen tube 600, a flow channel 203 connecting the inner side and the outer side of the joint 200 is provided on the joint 200, a first opening and closing component 300 and a plurality of second opening and closing components 400 are provided on the flow channel 203, specifically, the flow channel 203 is arranged in the inner wall of the joint 200, and a complete flow channel 203 is formed with the assembly of the joint 200, the outer tube 100 and the sealing sleeve 204, in detail, the outer wall of the joint 200 can be processed, and a part of the flow channel 203 is formed after the outer tube 100 and the joint 200 are assembled, a radially extending hole groove can be provided in the joint 200 to form a part of the flow channel 203, and the inner wall of the joint 200 can be processed, and a part of the flow channel 203 is formed after the joint 200 and the sealing sleeve 204 are assembled.

[0034] The water control device 500 is an AICD water control device 500, which is intended to improve the production efficiency of oil wells and optimize the water-oil ratio. The AICD water control device 500 is widely used in oil fields, especially in the exploitation of water-bearing oil layers, to reduce water production and improve the overall oil production rate of oil wells.

[0035] The joint 200 and the sealing sleeve 204 are arranged on the inner side of the outer tube 100 in sequence. The sealing performance between the joint 200 and the outer tube 100 is improved by welding, and a plurality of sealing rings for improving the sealing performance there are arranged between the outer wall of the joint 200 and the inner wall of the outer tube 100. Specifically, rubber sealing rings can be used to improve the sealing performance after assembly. A sealing ring is also arranged between the sealing sleeve 204 and the joint 200. In order to maintain the positioning accuracy of the sealing ring, annular grooves for accommodating the sealing ring are respectively arranged on the outer wall and the inner wall of the joint 200, so that the sealing ring can accurately play a sealing role at the target position.

[0036] like Figure 2 As shown, communication is achieved from the inside of the joint 200 to the outside of the joint 200 through the flow channel 203, and the flow channel 203 is connected to the interlayer at the screen pipe 600, thereby completing the communication between the formation inside the joint 200 and the outside of the screen pipe 600, wherein the first opening and closing component 300 is configured to be able to conduct or close the flow channel 203 between the inside of the joint 200 and the second opening and closing component 400; the second opening and closing component 400 is configured to be able to conduct or close the flow channel 203 between the first opening and closing component 300 and the outside of the joint 200.

[0037] It should be noted that the multiple second opening and closing components 400 are arranged in series in the flow channel 203. That is to say, when a second opening and closing component 400 is not closed tightly due to impurities or other factors and a sealing gap appears, other second opening and closing components 400 will also provide a stable sealing state at subsequent positions in the flow channel 203, thereby effectively maintaining the flow control effect.

[0038] In an optional embodiment, the working principle of the flow control screen pipe in the present application is that it includes an outer tube 100 connected to the screen pipe 600 at one end, a joint 200 is provided in the outer tube 100, a sealing sleeve 204 is provided on the inner side of the joint 200, a water control device 500 is provided between the joint 200 and the screen pipe 600, a flow channel 203 connecting the inner side and the outer side of the joint 200 is provided on the joint 200, a first opening and closing component 300 and a plurality of second opening and closing components 400 are provided on the flow channel 203, the first opening and closing component 300 is configured to conduct or close the flow channel 203 between the inner side of the joint 200 and the second opening and closing component 400, the second opening and closing component 400 is configured to conduct or close the flow channel 203 between the first opening and closing component 300 and the outer side of the joint 200, when the formation needs to inject steam, the steam When reaching the bottom of the well, the first opening and closing component 300 drives and conducts the flow channel 203 between the inner side of the joint 200 and the second opening and closing component 400, and pushes the second opening and closing component 400 to conduct the flow channel 203 between the first opening and closing component 300 and the outer side of the joint 200, and enters the formation from the interlayer of the screen pipe 600 under the guidance of the flow channel 203, realizing the integration of pipe column injection and production, meeting the needs of some oil and gas wells for steam injection or injection of other media, expanding the application scope on the basis of the AICD water control device 500, facilitating later operations, and effectively preventing the workover fluid from entering the formation during the workover operation when operating the thermal recovery heavy oil well, avoiding the cold damage and other pollution of the workover fluid to the formation. When facing heavy oil thermal recovery wells or oil and gas wells with injection needs in the later stage, the AICD water control pipe column has strong applicability and reliable operation.

[0039] like Figure 3 As shown, in an optional embodiment, the first opening and closing component 300 includes a sealing rod 301 that can reciprocate in the joint 200, and a through hole 302 is provided on the sealing rod 301. When the sealing rod 301 moves to the point where the through hole 302 corresponds to the flow channel 203, the flow channel 203 is connected between the first opening and closing.

[0040] When the flow channel 203 between the inner side of the control joint 200 and the second opening and closing component 400 is in a conducting state, the conducting and closed states are switched by operating the movement of the sealing rod 301. When the flow channel 203 needs to be conducted, the sealing rod 301 moves to the through hole 302 corresponding to the flow channel 203 to form a connected state. When the sealing rod 301 moves to the state where the through hole 302 and the flow channel 203 are misaligned, a closed state is formed.

[0041] In an optional embodiment, the first opening and closing component 300 also includes a plug 303 and a first elastic member 304, the plug 303 is fixed on the joint 200, the first elastic member 304 is connected between the sealing rod 301 and the plug 303, and the first elastic member 304 is used to push the sealing rod 301 to move to a position where the through hole 302 and the flow channel 203 are misaligned, the first elastic member 304 can be set as a wave spring or a disc spring, and after the first elastic member 304 is assembled, the axial dimension is small, the overall thickness can be kept small, and the overall inner diameter of the screen tube 600 is ensured.

[0042] Specifically, a plug 303 is provided and fixed on the joint 200 to form a positioning basis for the sealing rod 301, and a first elastic member 304 is provided and connected between the plug 303 and the sealing rod 301. When the sealing rod 301 moves to the point where the through hole 302 corresponds to the flow channel 203, the first elastic member 304 is compressed, and under the action of the driving force or deformation recovery force of the first elastic member 304, the sealing rod 301 has a tendency to move to a state misaligned with the flow channel 203, so as to stably control the relative position of the sealing rod 301, avoid the occurrence of uncontrollable swinging states such as partial conduction, and improve reliability. A sealing ring for improving the sealing between the sealing rod 301 and the joint 200 can also be provided on the sealing rod 301.

[0043] In an optional embodiment, a first cavity 305 is provided between one end of the sealing rod 301 and the joint 200, and a first liquid that can absorb heat and expand is provided in the first cavity 305, so that the first liquid can push the sealing rod 301 to move to a position corresponding to the through hole 302 and the flow channel 203 after absorbing heat and expanding.

[0044] Furthermore, a first liquid is arranged at one end of the sealing rod 301. When steam needs to be injected into the formation, the steam reaches the bottom of the well, and the steam causes the first liquid to absorb heat and expand. When the first liquid is subjected to heat input, its molecules will have higher kinetic energy due to the increase in temperature, which will cause the interaction between the molecules to weaken, thereby reducing the density of the first liquid, i.e., expanding. After the first liquid in the first cavity 305 expands, it pushes the sealing rod 301 to move until the through hole 302 on the sealing rod 301 corresponds to the flow channel 203. At this time, the drive switching of the position of the sealing rod 301 is completed, and under the operating condition of injecting steam, the conduction state switching can be achieved more stably.

[0045] During normal well washing and pump inspection operations, because the temperature of the well repairing fluid is low, the sealing rod 301, under the action of the first elastic member 304, always keeps the through hole 302 of the sealing rod 301 and the flow channel 203 in a misaligned state. At this time, the flow channel 203 remains closed, and the operating liquid cannot enter the formation through the flow channel 203, thereby preventing the formation from being damaged by cold and contaminated by the well repairing fluid.

[0046] like Figure 4 As shown, in an optional embodiment, the second opening and closing component 400 includes a base 401 and a connecting seat 402 fixedly connected to the joint 200, an operating channel is provided in the second opening and closing component 400, and a reciprocating sealing head 403 is provided on the base 401, and a second elastic member 404 for driving the sealing head 403 to close the operating channel is provided on the sealing head 403, and the second elastic member 404 can be set as a wave spring or a disc spring. After the second elastic member 404 is assembled, the axial dimension is small, and the overall thickness can be kept small, which is convenient for ensuring the overall inner diameter of the screen tube 600.

[0047] It should be noted that after the second elastic member 404 is assembled, the second elastic member 404 undergoes a certain deformation, and thus has a certain deformation recovery force to keep pushing the sealing head 403 to remain closed in the working channel in this state, maintaining a reliable basic sealing state, and the force on the sealing head 403 can also be adjusted by adjusting the elastic specifications of the second elastic member 404.

[0048] A plurality of second opening and closing components 400 are provided, and each second opening and closing component 400 is sequentially provided in the flow channel 203. The connecting seat 402 in each second opening and closing component 400 is fixed on the joint 200, and can be specifically detachably fixed by threaded connection. Furthermore, high-temperature thread glue can be applied between the connecting seat 402 and the joint 200 when the connecting seat 402 is transferred, so as to further improve the connection stability and the connection sealing at this location.

[0049] The base 401 is fixed on the connecting seat 402 and is provided with a reciprocating sealing head 403. When the sealing head 403 blocks the working channel, the flow channel 203 where the working channel is located is also closed, and the second elastic member 404 provides a force for the sealing head 403 to block the working channel. The flow pressure of the liquid or gas in the flow channel 203 can push the sealing head 403 in the working channel and compress the second elastic member 404, thereby causing the displacement of the sealing head 403 to open the working channel and achieve a stable connection state to the formation during operation.

[0050] In an optional embodiment, the working channel includes a first through-hole 405 provided on the base 401, an intermediate cavity 406 provided between the base 401 and the connecting seat 402, and a second through-hole 407 provided on the connecting seat 402. The second elastic member 404 pushes the sealing head 403 to block the second through-hole 407, so that liquid or gas can push the sealing head 403 to move through the second through-hole 407 and enter the intermediate cavity 406 and the first through-hole 405 in turn.

[0051] Specifically, when arranging the working channel, a first through hole 405 is opened on the base 401, a second through hole 407 is set on the connecting seat 402, and the sealing head 403 is arranged in the middle cavity 406 between the base 401 and the connecting seat 402. The sealing head 403 and the second elastic member 404 are located in the middle cavity 406 and move. The sealing head 403 is pushed by the fluid to separate from the second through hole 407 on the connecting seat 402, or is pushed by the second elastic member 404 to be pressed on the second through hole 407. A plurality of first through holes 405 set on the base 401 can be set to improve the flow efficiency in the flow channel 203.

[0052] In an optional embodiment, a step groove 201 is provided on the joint 200, the connecting seat 402 is threadedly connected in the step groove 201, and the step groove 201 and the connecting seat 402 are respectively provided with conical surfaces 202 that abut against each other.

[0053] The setting of the step groove 201 increases the length of the connecting surface between the connecting seat 402 and the joint 200 after the connecting seat 402 is connected, and improves the connection sealing after assembly through the turning path of the contact surface of the step groove 201. The assembly accuracy can be improved through the cooperation of the step groove 201. Correspondingly, a conical surface 202 is also provided to further improve the assembly accuracy and connection sealing.

[0054] In an optional embodiment, the water control device 500 is disposed between the joint 200 and the screen tube 600 via a water control joint 502, and the water control joint 502 is threadedly connected to the joint 200 and the screen tube 600, respectively, to facilitate flexible assembly operations between structures.

[0055] In an optional embodiment, a soluble sealing ring 501 is provided at one end of the water control device 500 close to the joint 200. The soluble sealing ring 501 can seal the water control device 500 before dissolving. That is, after the soluble sealing ring 501 dissolves, the formation fluid enters the screen tube 600 through the water control device 500. Because the second opening and closing components 400 are in a sealed state under the action of the second elastic member 404, all liquids can only enter the screen tube 600 through the water control device 500. The water control device 500 plays a flow control role. Because the pressure outside the screen tube 600 is greater than the pressure inside the screen tube 600 during production, this pressure difference also ensures the stable sealing state of the second opening and closing component 400.

[0056] Based on the same inventive concept, the present application also provides a tubing system, including the above-mentioned integrated injection and production flow control screen. Specifically, in the tubing system, except that the flow control screen and related components adopt the technical solutions in the above-mentioned embodiments, the structures, connection relationships, installation positions, etc. of other devices can refer to the relevant disclosures of the prior art and will not be elaborated here.

[0057] It should be understood that the terms first, second, etc. are only used to distinguish descriptions and should not be understood as indicating or suggesting relative importance. Although the terms first, second, etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another unit. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit without departing from the scope of the exemplary embodiments of the present invention.

[0058] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another relationship between associated objects, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0059] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside" and the like indicate orientations or positional relationships that are customarily placed when the disclosed product is used, or are orientations or positional relationships that are customarily understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0060] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The terms used herein are only used to describe specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates the opposite meaning. It should also be understood that the terms "include", "comprising", "including", and / or "comprising" when used herein specify the existence of the claimed features, integers, steps, operations, units, and / or components, and do not exclude the existence or increase of one or more other features, quantities, steps, operations, units, components, and / or their combinations.

[0062] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, it should be understood by those of ordinary skill in the art that the exemplary embodiments may be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid making the exemplary embodiments unclear.

[0063] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

[0064] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field.

Claims

1. An injection-production integrated flow control screen, characterized in that: The flow control screen tube comprises: an outer tube, one end of which is used to connect to the screen tube; A joint, the joint is fixedly connected in the outer tube, a sealing sleeve is provided on the inner side of the joint, a water control device is provided between the joint and the screen tube, a flow channel connecting the inner side and the outer side of the joint is provided on the joint, and a first opening and closing component and a plurality of second opening and closing components are provided on the flow channel; The first opening and closing component is configured to open or close the flow channel between the inner side of the joint and the second opening and closing component; The second opening and closing component is configured to open or close the flow channel between the first opening and closing component and the outside of the joint.

2. The injection-production integrated flow control screen according to claim 1, characterized in that: The first opening and closing component includes a sealing rod that can reciprocate in the joint, the sealing rod is provided with a through hole, and when the sealing rod moves to the point where the through hole corresponds to the flow channel, the flow channel is connected between the first opening and closing.

3. The injection-production integrated flow control screen as claimed in claim 2, characterized in that: The first opening and closing assembly also includes a plug and a first elastic member, the plug is fixed on the joint, the first elastic member is connected between the sealing rod and the plug, and the first elastic member is used to push the sealing rod to move to a position where the through hole and the flow channel are misaligned.

4. The injection-production integrated flow control screen as claimed in claim 2, characterized in that: A first cavity is provided between one end of the sealing rod and the joint, and a first liquid capable of absorbing heat and expanding is provided in the first cavity, so that the first liquid can push the sealing rod to move to a position corresponding to the through hole and the flow channel after absorbing heat and expanding.

5. The injection-production integrated flow control screen according to claim 1, characterized in that: The second opening and closing component includes a base and a connecting seat fixedly connected to the joint, an operating channel is arranged in the second opening and closing component, and a sealing head capable of reciprocating movement is arranged on the base, and a second elastic member for driving the sealing head to close the operating channel is arranged on the sealing head.

6. The injection-production integrated flow control screen as claimed in claim 5, characterized in that: The working channel includes a first through-hole provided on the base, an intermediate cavity provided between the base and the connecting seat, and a second through-hole provided on the connecting seat. The second elastic member pushes the sealing head to block the second through-hole so that liquid or gas can push the sealing head to move through the second through-hole and enter the intermediate cavity and the first through-hole in turn.

7. The injection-production integrated flow control screen as claimed in claim 5, characterized in that: The joint is provided with a step groove, the connecting seat is threadedly connected in the step groove, and the step groove and the connecting seat are respectively provided with conical surfaces that abut against each other.

8. The injection-production integrated flow control screen as claimed in claim 1, characterized in that: The water control device is arranged between the joint and the screen tube through a water control joint, and the water control joint is threadedly connected with the joint and the screen tube respectively.

9. The injection-production integrated flow control screen as claimed in claim 8, characterized in that: A soluble sealing ring is provided at one end of the water control device close to the joint, and the soluble sealing ring can seal the water control device before dissolving.

10. A pipe string system, characterized in that: It comprises the injection-production integrated flow control screen as described in any one of claims 1-9.

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