A sealing and integrating device and a dispensing pipe column

Abstract

The application provides a sealing integrated device and a separate injection pipe column, and belongs to the technical field of integrated devices. The sealing integrated device comprises a first joint, a first central pipe, a first transition joint, a second central pipe, a second transition joint and a second joint which are sequentially connected. A packer rubber cylinder is arranged outside the second central pipe, and the two ends of the packer rubber cylinder are respectively in sealing connection with the first transition joint and the second transition joint. A gap is left between the packer rubber cylinder and the second central pipe. A liquid channel is arranged in the wall of the first transition joint, and a movable valve is arranged in the liquid channel. A hole is arranged in the inner wall of the first transition joint, and the hole is in communication with the gap through the liquid channel. The packer rubber cylinder is arranged outside the second central pipe, and a water outlet is arranged on the first joint, so that the water distributor and the packer are integrated, the separate injection of small interlayers is facilitated, and the sealing and water injection of some thin water injection layers are realized.

Description

Technical Field

[0001] This invention belongs to the field of integrated device technology, and specifically relates to an integrated sealing and dispensing device and a dispensing tubing string. Background Technology

[0002] Currently, oilfield stratified water injection tubing, regardless of whether it's eccentric or concentric, uses compressible washable packers for segmented sealing. After the tubing is sealed and lowered, it needs to be pressurized and set via a cement truck tubing. Because the packer and distributor need to be connected through the tubing, the distance between each layer is too large, making it impossible to seal and inject water into some thin water injection layers. Existing technologies design the packer and distributor separately, such as the following technologies:

[0003] CN111119811A discloses a dual-medium dispenser, a dispensing tubing string, and a method for operating the dispensing tubing string. The dual-medium dispenser includes: a dispenser body comprising a working cylinder upper connector, a working cylinder body, and a working cylinder lower connector connected in sequence, the working cylinder body having a flow-through orifice; a first throttle, disposed inside the dispenser body, comprising a throttle body and an adjusting element connected to each other, the adjusting element being able to block or avoid the flow-through orifice to adjust the opening size of the flow-through orifice; and a second throttle, located inside the dispenser body, with a medium discharge orifice provided at the position corresponding to the second throttle. This invention solves the problem that existing dispensers cannot be used for both water injection and gas injection operations.

[0004] The aforementioned cases disclosed the injection device, but did not disclose the integrated design of the packer and water distributor. Therefore, for water injection in some small-spacing injection layers, an integrated packer and water distributor injection string is needed. Summary of the Invention

[0005] To address the above problems, the present invention proposes an integrated sealing and assembly device, comprising a first connector, a first central tube, a first transition connector, a second central tube, a second transition connector, and a second connector connected in sequence. The outer surface of the first connector is provided with a water outlet, which is connected to the inner wall of the first central tube.

[0006] A packer sleeve is provided on the outside of the second central tube, and the two ends of the packer sleeve are respectively sealed to the first transition joint and the second transition joint. A gap is left between the packer sleeve and the second central tube. A liquid channel is provided in the wall of the first transition joint, and a hole is provided in the inner wall of the first transition joint. The hole communicates with the gap between the second central tube and the packer sleeve through the liquid channel.

[0007] Furthermore, it also includes a first outer protective tube, which is installed on the outside of the first central tube, and both ends of the first outer protective tube are threadedly connected to the first joint and the first transition joint, respectively.

[0008] Furthermore, it also includes a motor, which is installed between the first central tube and the first outer protective tube, and the motor is connected to the actuating valve via a transmission.

[0009] Furthermore, a limit joint is provided on the inner wall of the first outer protective tube, and the limit joint is located between the motor and the actuating valve.

[0010] Furthermore, the integrated sealing and fitting device also includes a first control unit disposed on the side of the motor away from the actuating valve; the first control unit is installed between the first central tube and the first outer protective tube and is electrically connected to the motor.

[0011] Furthermore, a collection port is provided on the outer surface of the first outer protective tube, and a flow monitoring device is provided between the first central tube and the first outer protective tube, with the flow monitoring device facing the collection port.

[0012] Furthermore, a sensor is installed between the first outer protective tube and the first central tube.

[0013] Furthermore, an electric valve is installed on the outlet, and the electric valve is electrically connected to a second control unit that is located between the first outer protective pipe and the first central pipe.

[0014] Furthermore, a fixing pin is provided on the outside of the first outer protective tube, and the fixing pin passes through the first outer protective tube and is fixedly connected to the first connector.

[0015] Furthermore, a first sealing ring is connected between the first outer protective tube and the first transition joint.

[0016] Furthermore, a safety pin is provided inside the second transition joint.

[0017] Furthermore, the second connector has a first cable interface at the end away from the first connector, and the first cable interface is electrically connected to the first control unit and the second control unit.

[0018] A dispensing tubing string includes a tubing string, an electric ball valve, and the aforementioned sealing and fitting integrated device. One end of the tubing string away from the electric ball valve is connected to a wellhead control cabinet located on the ground, and the other end is connected to the second connector of the sealing and fitting integrated device. The first connector of the sealing and fitting integrated device is connected to the second connector of an adjacent sealing and fitting integrated device, or to the third connector of the electric ball valve.

[0019] Furthermore, the electric ball valve includes a connecting pipe with an outlet; a third connector is provided at one end of the connecting pipe, which is connected to a first connector; a conversion connector is connected to the other end of the connecting pipe, and the end of the conversion connector away from the connecting pipe is fixedly connected to a second outer protective tube; a sealing plug assembly is slidably installed in the second outer protective tube.

[0020] Furthermore, a protective tube is provided inside the second outer protective tube, and the protective tube is located on the side of the sealing plug assembly away from the third connector.

[0021] Furthermore, a drive motor is provided inside the protective tube. The drive motor is located on the side of the sealing plug assembly away from the third connector. The motor shaft of the drive motor is connected to a lead screw via a coupling. The lead screw is threadedly engaged with the sealing plug assembly.

[0022] Furthermore, a power conversion component, a control component, and an inductive isolation component are sequentially arranged in the protection tube. The power conversion component is electrically connected to the control component, and the control component is electrically connected to the drive motor.

[0023] Furthermore, a fluid channel is provided inside the connecting pipe, and a sealing plug assembly is slidably installed in the fluid channel; the fluid channel is connected to the outlet;

[0024] The fluid channel is provided with a second sealing ring on the inner side, and the second sealing ring is located on the side of the outlet near the third connector.

[0025] Furthermore, the adapter is provided with a second anti-rotation pin, which passes through the adapter and connects to the connecting pipe.

[0026] Furthermore, a bottom cone is provided at the end of the sealing plug assembly away from the third connector.

[0027] Beneficial effects:

[0028] 1. This invention connects a first connector, a first central tube, a first transition connector, a second central tube, a second transition connector, and a second connector in sequence, with a packer sleeve provided on the outside of the second central tube and a water outlet provided on the first connector. This integrates the water distributor and the packer into one unit, reducing the number of cable heads used by half, reducing costs, and improving process reliability. The total length of key components is reduced by half, which is more conducive to the subdivision of water injection in small strata, enabling the sealing and water injection of some relatively thin water injection layers.

[0029] 2. The present invention is equipped with a limit joint, which is used to limit the displacement stroke of the valve driven by the motor, so as to avoid damage caused by increased motor torque.

[0030] 3. This invention sends commands to the downhole sealing and dispensing integrated device and electric ball valve via cable. After receiving the adjustment and dispensing command, the sealing and dispensing integrated device begins to adjust the injection volume of each layer. Upon receiving the opening command, the electric ball valve is in the open state. In conjunction with the unsealed sealing and dispensing integrated device, a large well-washing channel is formed in the annular space between the water injection string and the water injection well casing, which can perform forward and reverse well washing. Because the well-washing channel is greatly enlarged, the well-washing effect can be effectively improved.

[0031] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0032] 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.

[0033] Figure 1 A schematic diagram of the sealing and assembly integrated device in an embodiment of the present invention is shown.

[0034] Figure 2 This diagram shows an enlarged view of the first partial structure of the sealing and assembly device in an embodiment of the present invention.

[0035] Figure 3 This diagram shows a second enlarged partial structural view of the sealing and assembly device in an embodiment of the present invention.

[0036] Figure 4 This diagram shows an enlarged view of the third partial structure of the sealing and assembly device in an embodiment of the present invention.

[0037] Figure 5 A schematic diagram of the injection tubing string in an embodiment of the present invention is shown.

[0038] Figure 6 A schematic diagram of an electric ball valve in an embodiment of the present invention is shown.

[0039] Figure 7 An enlarged schematic diagram of the first partial structure of the electric ball valve in an embodiment of the present invention is shown.

[0040] Figure 8 An enlarged schematic diagram of a second partial structure of the electric ball valve in an embodiment of the present invention is shown.

[0041] In the diagram, 1. Integrated sealing and fitting device; 101. Outlet; 102. Flow monitoring component; 103. Sensor; 104. First control unit; 105. Second control unit; 106. Actuating valve; 107. Hole; 108. Packer sleeve; 109. Safety pin; 110. Second central tube; 111. First cable interface; 112. First anti-rotation pin; 113. First sealing ring; 114. Fixing pin; 115. First connector; 116. First outer protective tube; 117. Collection port; 118. Motor; 119. Limiting joint; 120. First transition joint; 121. Second connector; 122. First central tube; 123. Second transition joint; 124. Liquid channel; 125. Electric valve;

[0042] 2. Electric anchor;

[0043] 3. Electric ball valve; 301. Fluid passage; 302. Second cable interface; 303. Sealing plug assembly; 304. Drive motor; 305. Control assembly; 306. Bottom cone; 307. Inductive isolator; 308. Power conversion component; 309. Protective tube; 310. Second outer protective tube; 311. Coupling; 312. Lead screw; 313. Adapter joint; 314. Second anti-rotation pin; 315. Second sealing ring; 316. Thrust bearing; 317. Third connector; 318. Outlet; 319. Connecting pipe;

[0044] 4. Cables; 5. Control system; 6. Wellhead control cabinet; 7. Injection well; 8. Tubing string. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0046] Implementation method 1,

[0047] like Figure 1 As shown, Figure 1 A schematic diagram of the integrated sealing and assembly device according to an embodiment of the present invention is shown. (Reference) Figure 1A sealing and fitting integrated device includes a first connector 115, a first central tube 122, a first transition connector 120, a second central tube 110, a second transition connector 123, and a second connector 121 connected in sequence. The outer surface of the first connector 115 is provided with a water outlet 101, which communicates with the inner wall of the first central tube 122. A packer sleeve 108 is provided on the outer side of the second central tube 110, and both ends of the packer sleeve 108 are respectively sealed to the first transition connector 120 and the second transition connector 123, with a gap between the packer sleeve 108 and the second central tube 110. The wall of the first transition connector 120 is provided with a liquid channel 124, and an actuating valve 106 is provided in the liquid channel 124. The inner wall of the first transition connector 120 is provided with a hole 107, which communicates with the gap between the second central tube 110 and the packer sleeve 108 through the liquid channel 124. The packer sleeve 108 is used to seal the formation. The expansion and release of the packer sleeve 108 are controlled by the first control unit 104. The first transition joint 120 is used to connect the water distributor and the packer. The water distributor includes the first joint 115, the first anti-rotation pin 112 and the first outer protective tube 116. The packer includes the second central tube 110, the second transition joint 123, the second joint 121 and the packer sleeve 108.

[0048] In this embodiment of the invention, a first outer protective tube 116 is also included. The first outer protective tube 116 is installed outside the first central tube 122, and both ends of the first outer protective tube 116 are threadedly connected to the first connector 115 and the first transition connector 120, respectively. The first outer protective tube 116 is used to protect the flow monitoring element 102 and the sensor 103. A motor 118 is installed between the first central tube 122 and the first outer protective tube 116, and the motor 118 is drivenly connected to the actuating valve 106 (the motor 118 is connected to a lead screw, which engages with a nut on the actuating valve 106, and the actuating valve 106 is slidably installed in the liquid channel 124). A limit joint 119 is provided on the inner wall of the first outer protective tube 116 (see reference). Figure 3 The limiting joint 119 is located between the motor 118 and the actuating valve 106. The limiting joint 119 is used to limit the displacement stroke of the actuating valve 106 driven by the motor 118, so as to prevent the motor 118 from being damaged due to increased torque. It also includes a first control unit 104 located on the side of the motor 118 away from the actuating valve 106; the first control unit 104 is installed between the first central tube 122 and the first outer protective tube 116, and is electrically connected to the motor 118.

[0049] Specifically, the first control unit 104 controls the motor 118 to rotate, and the motor 118 drives the actuating valve 106 to slide horizontally in the liquid channel 124 (e.g., Figure 1As shown in the figure, the valve 106 is opened and closed. When the valve 106 moves to the left and moves away from the hole 107, the hole 107 is connected to the liquid channel 124. The high-pressure liquid generated by the pump truck in the oil pipe enters the gap between the packer sleeve 108 and the second central tube 110 through the hole 107, causing the packer sleeve 108 to expand and contact the formation to seal, thus achieving the purpose of sealing the formation. Then, when the valve 106 moves to the right under the drive of the motor 118 and moves to the cover hole 107, the hole 107 is disconnected from the liquid channel 124, so that the high-pressure liquid is always trapped in the gap, and the packer sleeve 108 is always in an expanded state, that is, the packer is in a set-sealing state. When the packer sleeve 108 needs to be in the released state, the actuating valve 106 moves to the left under the drive of the motor 118. When it moves to the exit hole 107, the hole 107 is connected to the liquid channel 124, allowing the high-pressure liquid trapped in the gap to enter the second central tube 110 through the liquid channel 124 and the hole 107, thus achieving communication between the formations. Then, the actuating valve 106 moves to the right under the drive of the motor 118. When it moves to the cover hole 107, the packer sleeve 108 is kept in the released state, that is, the packer is in the unsealed state.

[0050] In the above embodiments, another optional implementation is as follows: a collection port 117 is provided on the outer surface of the first outer protective tube 116; a flow monitoring element 102 is provided between the first central tube 122 and the first outer protective tube 116, the flow monitoring element 102 being directly opposite the collection port 117, and the flow monitoring element 102 being used to monitor the flow information of the water distributor outlet; a sensor 103 is provided between the first outer protective tube 116 and the first central tube 122, the sensor 103 including a pressure sensor and a temperature sensor. An electric valve 125 is installed on the outlet 101, the electric valve 125 being electrically connected to a second control unit 105 located between the first outer protective tube 116 and the first central tube 122. The electric valve 125 of the outlet 101 is controlled by the second control unit 105, thereby controlling the water injection volume. A fixing pin 114 (see reference) is provided on the outer side of the first outer protective tube 116. Figure 2 The fixing pin 114 passes through the first outer protective tube 116 and is fixedly connected to the first connector 115. The fixing pin 114 is used to limit the position of the first outer protective tube 116 and the first connector 115.

[0051] Specifically, a first sealing ring 113 is connected between the first outer sheath 116 and the first transition joint 120. The first sealing ring 113 is used to seal the first outer sheath 116 and the first transition joint 120 to prevent water ingress. A safety pin 109 is provided inside the second transition joint 123. A first cable interface 111 is provided at the end of the second connector 121 away from the first connector 115 (see reference). Figure 4The first cable interface 111 is electrically connected to the first control unit 104 and the second control unit 105. The first cable interface 111 is connected to cable 4.

[0052] Implementation method 2,

[0053] like Figure 5 As shown, Figure 5 A schematic diagram of the injection string in an embodiment of the present invention is shown. (Reference) Figure 5 A type of injection string includes a string 8, several sealing and fitting devices 1 (as described in Embodiment 1), and an electric ball valve 3 connected in sequence. One end of the string 8, away from the electric ball valve 3, is connected to a wellhead control cabinet 6 located on the ground. The other end is connected to the second connector 121 of the sealing and fitting device 1. The first connector 115 of the sealing and fitting device 1 is connected to the second connector 121 of an adjacent sealing and fitting device 1, or to the third connector 317 of the electric ball valve 3. The string 8 is connected to an injection well 7 via an electric anchor 2. The electric ball valve 3 is connected to the wellhead control cabinet 6 via a cable 4. The wellhead control cabinet 6 is communicatively connected to a control system 5. The string 8, the sealing and fitting device, and the electric ball valve 3 are sequentially lowered into the injection well 7. The electric ball valve 3 and the sealing and fitting device 1 are connected in series via the cable 4, and the cable 4 passes through the injection well 7 and then connects to the wellhead control cabinet 6. After the tubing string 8 is lowered to the designated layer, it is connected to the pump truck via a pressurization line. The pump truck then pressurizes and seals the tubing string 8 in stages. Once sealing is complete, well completion can proceed. If control operations of the downhole tools are required, commands can be sent to the downhole sealing and distribution device 1 and the electric ball valve 3 via cable 4. After receiving the adjustment and distribution command, the sealing and distribution device 1 begins to adjust the injection volume for each layer. Upon receiving the opening command, the electric ball valve 3 is in the open state. Together with the unsealed sealing and distribution device 1, a large well-washing channel is formed in the annular space between the injection well 7 and the tubing string 8, allowing for both forward and reverse well-washing. Due to the significantly increased well-washing channel, the well-washing effect can be effectively improved.

[0054] refer to Figure 6 The electric ball valve 3 includes a connecting pipe 319, and an outlet 318 is provided on the connecting pipe 319 (see reference). Figure 7A third connector 317 is provided at one end of the connecting pipe 319, which is connected to the first connector 115. A conversion connector 313 is connected to the other end of the connecting pipe 319, and the other end of the conversion connector 313 is fixedly connected to the second outer protective pipe 310. A sealing plug assembly 303 is slidably installed in the second outer protective pipe 310. The electric ball valve 3 is connected to the cable 4 through the second cable interface 302, and is powered and controlled by the cable 4. In conjunction with the wellhead control cabinet 6 and the control system 5, the various components are coordinated to achieve the operation of each other, thereby achieving the closure and connection of the fluid channel 301 to the outside. A drive motor 304 is provided inside the protective pipe 309. The drive motor 304 is located on the side of the sealing plug assembly 303 away from the third connector 317. The motor shaft of the drive motor 304 is connected to the lead screw 312 through the coupling 311 (see reference). Figure 8 The lead screw 312 is threadedly engaged with the sealing plug assembly 303. A thrust bearing 316 is provided on the motor shaft of the drive motor 304. The two ends of the thrust bearing 316 are in contact with the drive motor 304 and the coupling 311, respectively, thereby reducing friction.

[0055] In this invention, a protective tube 309 is provided inside the second outer protective tube 310. The protective tube 309 is located on the side of the sealing plug assembly 303 away from the third connector 317. The protective tube 309 is used to protect the power conversion component 308 and the control component 305. The power conversion component 308, the control component 305, and the inductive isolation component 307 are sequentially arranged in the protective tube 309. The power conversion component 308 is electrically connected to the control component 305, and the control component 305 is electrically connected to the drive motor 304. The cable 4 is electrically connected to the control component 305 through the power conversion component 308. A fluid channel 301 is provided inside the connecting pipe 319, and the fluid channel 301 communicates with the first connector 115. The sealing plug assembly 303 is slidably installed in the fluid channel 301. The fluid channel 301 communicates with the outlet 318. A second sealing ring 315 is provided inside the fluid channel 301, and the second sealing ring 315 is located on the side of the outlet 318 closer to the third connector 317. The second sealing ring 315 is used to seal the outlet 318 and the third connector 317.

[0056] In the above embodiments, an alternative implementation is provided whereby a second anti-rotation pin 314 is provided on the adapter 313, and the second anti-rotation pin 314 passes through the adapter 313 and connects to the connecting pipe 319. The second anti-rotation pin 314 is used to prevent relative rotation between the adapter 313 and the connecting pipe 319. A bottom cone 306 is provided at the end of the sealing plug assembly 303 away from the third connector 317. The electric ball valve 3 is often used at the bottom of the injection string, and the bottom cone 306 is cone-shaped, which can guide the injection string as it is lowered into the injection well 7.

[0057] Specifically, when the fluid channel 301 needs to be closed to provide setting conditions for the packer, the wellhead control cabinet 6 sends a flow channel closing command to the control assembly 305 via the second cable interface 302 through the cable 4. The drive motor 304 drives the sealing plug assembly 303 to move from right to left on the lead screw 312 through the coupling 311 (e.g., Figure 3 (As shown), the fluid channel 301 is blocked, thus closing the fluid channel 301. When it is necessary to connect the fluid channel 301 to the outside world to provide conditions for well cleaning, the wellhead control cabinet 6 sends a command to open the fluid channel 301 to the control component 305 via the second cable interface 302 through the cable 4. The drive motor 304 drives the sealing plug assembly 303 to move from left to right on the lead screw 312 (as shown). Figure 3 As shown, the fluid channel 301 is opened, thus enabling the fluid channel 301 to be activated.

[0058] Working principle:

[0059] First, the tubing string 8, several integrated sealing and fitting devices 1, and electric ball valves 3 are connected in sequence. These are then connected in series with the first cable interface 111 and the second cable interface 302 via cable 4. Cable 4 is then passed through the injection well 7 and connected to the wellhead control cabinet 6. Next, the tubing string 8, several integrated sealing and fitting devices 1, and electric ball valves 3 are lowered into the injection well 7.

[0060] After the tubing string 8 is lowered to the designated layer, it is connected to the pump truck via a pressurization line. The pump truck then pressurizes and seals the tubing string 8 in stages. Once sealing is complete, well completion can proceed. If control operations of the downhole tools are required, commands can be sent to the downhole sealing and distribution device 1 and the electric ball valve 3 via cable 4. After receiving the adjustment and distribution command, the sealing and distribution device 1 begins to adjust the injection volume for each layer. Upon receiving the opening command, the electric ball valve 3 is in the open state. Together with the unsealed sealing and distribution device 1, a large well-washing channel is formed in the annular space between the injection well 7 and the tubing string 8, allowing for both forward and reverse well-washing. Due to the significantly increased well-washing channel, the well-washing effect can be effectively improved.

[0061] Specifically, the wellhead control cabinet 6 sends a flow channel closure command to the first control unit 104 via cable 4 through the first cable interface 111. The first control unit 104 controls the motor 118, which is a high-temperature resistant motor. The motor 118 drives the actuating valve 106 to slide horizontally in the liquid channel 124 (e.g., ...). Figure 1As shown), the valve 106 is opened and closed. When the valve 106 moves to the left and exits the hole 107, the hole 107 is connected to the liquid channel 124. The high-pressure liquid generated by the pump truck in the oil pipe enters the gap between the packer sleeve 108 and the second central pipe 110 through the hole 107, causing the packer sleeve 108 to expand and contact the formation to seal, thus achieving the purpose of sealing the formation. Then, when the valve 106 moves to the right under the drive of the motor 118 and reaches the cover hole 107, the hole 107 is disconnected from the liquid channel 124, so that the high-pressure liquid is always trapped in the gap, and the packer sleeve 108 is always in an expanded state, that is, the packer is in a set state. Then, the electric valve 125 of the outlet 101 is opened by the control unit 105, thereby completing the injection of water into the designated formation.

[0062] When the packer sleeve 108 needs to be in the released state, the actuating valve 106 moves to the left under the drive of the motor 118. When it moves to the exit hole 107, the hole 107 is connected to the liquid channel 124, allowing the high-pressure liquid trapped in the gap to enter the second central tube 110 through the liquid channel 124 and the hole 107. The packer sleeve 108 is released, enabling communication between the formations. Then, the actuating valve 106 moves to the right under the drive of the motor 118. When it moves to the cover hole 107, the packer sleeve 108 remains in the released state, which is the packer unsealed state.

[0063] Specifically, when the fluid channel 301 needs to be closed to provide setting conditions for the packer, the wellhead control cabinet 6 sends a flow channel closing command to the control assembly 305 via the second cable interface 302 through the cable 4. The drive motor 304 drives the sealing plug assembly 303 to move from left to right on the lead screw 312 through the coupling 311 (e.g., Figure 3 (As shown), the fluid channel 301 is blocked, thus closing the fluid channel 301. When it is necessary to connect the fluid channel 301 to the outside world to provide conditions for well cleaning, the wellhead control cabinet 6 sends a command to open the fluid channel 301 to the control component 305 via the second cable interface 302 through the cable 4. The drive motor 304 drives the sealing plug assembly 303 to move from right to left on the lead screw 312 (as shown). Figure 3As shown, the fluid channel 301 is opened, and water is injected through the formation or between the injection well 7 and the sub-injection tubing. The water flows from the outlet 318 into the fluid channel 301 and enters the electric ball valve 3. Then it enters the first central pipe 122 of the sealing and dispensing integrated device 1 and then the second central pipe 110. It then enters the tubing string 8 and exits from the tubing string 8, completing the water circulation and thus achieving well washing. Alternatively, water can be injected from the tubing string 8. The water passes through the second central pipe 110 and the first central pipe 122 of the sealing and dispensing integrated device 1 and then enters the fluid channel 301 of the electric ball valve 3. It flows out from the outlet 318 and then flows out through the gap between the injection well and the sub-injection tubing, completing the cleaning.

[0064] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing and assembly integrated device, characterized in that, It includes a first connector (115), a first central pipe (122), a first transition connector (120), a second central pipe (110), a second transition connector (123), and a second connector (121) connected in sequence. The outer surface of the first connector (115) is provided with a water outlet (101), and the water outlet (101) is connected to the inner wall of the first central pipe (122). A packer sleeve (108) is provided on the outside of the second central tube (110), and the two ends of the packer sleeve (108) are respectively sealed to the first transition joint (120) and the second transition joint (123). A gap is left between the packer sleeve (108) and the second central tube (110). A liquid channel (124) is provided in the wall of the first transition joint (120), and a hole (107) is provided in the inner wall of the first transition joint (120). The hole (107) communicates with the gap between the second central tube (110) and the packer sleeve (108) through the liquid channel (124).

2. The sealing and assembly integrated device according to claim 1, characterized in that, It also includes a first outer protective tube (116), which is installed on the outside of the first central tube (122), and the two ends of the first outer protective tube (116) are threadedly connected to the first connector (115) and the first transition connector (120) respectively.

3. The sealing and assembly integrated device according to claim 2, characterized in that, It also includes a motor (118), which is installed between the first central tube (122) and the first outer protective tube (116), and the motor (118) is connected to the actuating valve (106) for transmission.

4. The sealing and assembly integrated device according to claim 3, characterized in that, The inner wall of the first outer protective tube (116) is provided with a limiting joint (119), which is located between the motor (118) and the actuating valve (106).

5. The sealing and assembly integrated device according to claim 3, characterized in that, The sealing and fitting integrated device also includes a first control unit (104) disposed on the side of the motor (118) away from the actuating valve (106); the first control unit (104) is installed between the first central tube (122) and the first outer protective tube (116) and is electrically connected to the motor (118).

6. The sealing and assembly integrated device according to claim 2, characterized in that, The outer surface of the first outer protective tube (116) is provided with a collection port (117), and a flow monitoring device (102) is provided between the first central tube (122) and the first outer protective tube (116), with the flow monitoring device (102) facing the collection port (117).

7. The sealing and assembly integrated device according to claim 2, characterized in that, A sensor (103) is provided between the first outer protective tube (116) and the first central tube (122).

8. The sealing and assembly integrated device according to claim 2, characterized in that, An electric valve (125) is installed on the outlet (101), and the electric valve (125) is electrically connected to a second control unit (105) that is located between the first outer protective pipe (116) and the first central pipe (122).

9. The sealing and assembly integrated device according to claim 2, characterized in that, A fixing pin (114) is provided on the outside of the first outer protective tube (116), and the fixing pin (114) passes through the first outer protective tube (116) and is fixedly connected to the first connector (115).

10. The sealing and assembly integrated device according to claim 2, characterized in that, A first sealing ring (113) is connected between the first outer protective tube (116) and the first transition joint (120).

11. The sealing and assembly integrated device according to claim 1, characterized in that, The second transition joint (123) is provided with a safety pin (109).

12. The sealing and assembly integrated device according to claim 1, characterized in that, The second connector (121) has a first cable interface (111) at the end away from the first connector (115), and the first cable interface (111) is electrically connected to the first control unit (104) and the second control unit (105).

13. A dispensing tubing string, characterized in that, The device includes a tubing string (8), an electric ball valve (3), and a sealing and fitting integrated device (1) as described in any one of claims 1-12. One end of the tubing string (8) away from the electric ball valve (3) is connected to a wellhead control cabinet (6) located on the ground, and the other end is connected to the second connector (121) of the sealing and fitting integrated device (1). The first connector (115) of the sealing and fitting integrated device (1) is connected to the second connector (121) of the adjacent sealing and fitting integrated device (1), or to the third connector (317) of the electric ball valve (3).

14. A dispensing tubing string according to claim 13, characterized in that, The electric ball valve (3) includes a connecting pipe (319) with an outlet (318); a third connector (317) is provided at one end of the connecting pipe (319), which is connected to a first connector (115); a conversion connector (313) is connected to the other end of the connecting pipe (319), and the end of the conversion connector (313) away from the connecting pipe (319) is fixedly connected to a second outer protective tube (310); a sealing plug assembly (303) is slidably installed in the second outer protective tube (310).

15. A dispensing tubing string according to claim 14, characterized in that, The second outer protective tube (310) is provided with a protective tube (309) inside, and the protective tube (309) is located on the side of the sealing plug assembly (303) away from the third connector (317).

16. A dispensing tubing string according to claim 15, characterized in that, A drive motor (304) is provided inside the protective tube (309). The drive motor (304) is located on the side of the sealing plug assembly (303) away from the third connector (317). The motor shaft of the drive motor (304) is connected to the lead screw (312) through a coupling (311). The lead screw (312) is threadedly engaged with the sealing plug assembly (303).

17. A dispensing tubing string according to claim 16, characterized in that, A power converter (308), a control component (305), and an inductive isolation component (307) are sequentially arranged in the protection tube (309). The power converter (308) is electrically connected to the control component (305), and the control component (305) is electrically connected to the drive motor (304).

18. A dispensing tubing string according to claim 15, characterized in that, A fluid channel (301) is provided inside the connecting pipe (319), and a sealing plug assembly (303) is slidably installed in the fluid channel (301); the fluid channel (301) is connected to the outlet (318); The fluid channel (301) is provided with a second sealing ring (315) on the inner side, and the second sealing ring (315) is located on the side of the outlet (318) near the third connector (317).

19. A dispensing tubing string according to claim 14, characterized in that, The adapter (313) is provided with a second anti-rotation pin (314), which passes through the adapter (313) and connects to the connecting pipe (319).

20. A dispensing tubing string according to claim 14, characterized in that, A bottom cone (306) is provided at the end of the sealing plug assembly (303) away from the third connector (317).

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