Horizontal well completion pipe string

Abstract

The invention provides a horizontal well completion pipe string which comprises a casing pipe, an oil pipe arranged in the casing pipe, one or more control valves located on a vertical well section and arranged on the oil pipe, a packer located on the vertical well section and used for blocking gas in the casing pipe and a main control module. The control valve comprises a controller connected with the main control module, an in-valve sensor and an out-valve sensor, the in-valve sensor and the out-valve sensor are connected with the controller, the in-valve sensor is used for detecting internal pressure data of the oil pipe and transmitting the data to the controller, and the out-valve sensor is used for detecting internal pressure data of the sleeve and transmitting the data to the controller. The controller is used for receiving pressure data and transmitting the pressure data to the main control module, and when the pressure data detected by the out-valve sensor is larger than the pressure data detected by the in-valve sensor, the main control module controls the control valve to be opened through the controller so that the interior of the sleeve can communicate with the interior of the oil pipe. The gas lift efficiency can be improved, the control valve is prevented from being started in a traditional mechanical mode, and the production efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of heavy oil development, and more specifically, to a completion string for horizontal wells. Background Technology

[0002] In the development of natural gas wells, horizontal well development has become the main technical means for the efficient development of oil and gas fields. The existing horizontal well development mainly adopts bridge plug staged fracturing or volumetric fracturing technology. The oil and gas in the horizontal well are ejected from the well through the tubing. If the pressure in the well is too low, the oil and gas well cannot produce normally by self-flowing, and gas lift operation is required. That is, relying on the high-pressure gas injected into the well from the surface to mix with the oil layer to generate fluid in the wellbore. The expansion of the gas reduces the density of the mixture in the wellbore, and lifts the crude oil flowing into the well to the surface.

[0003] The gas lift valve is a crucial component for gas lift operations. It mainly consists of a valve body, air reservoir, ball and ball seat, check valve, and upper and lower sealing rings. However, with the changing depths of drainage and gas / oil production, the pressure in the downhole and tubing is becoming increasingly unpredictable, with significant and frequent pressure fluctuations. Traditional gas lift valves are increasingly unable to meet the requirements. If the pressure in the tubing and casing cannot be obtained in real time during the gas lift process, and the gas lift process cannot be controlled based on this pressure data, the gas introduced into the casing for gas lift will be unable to enter the tubing for an extended period, reducing gas lift efficiency. Summary of the Invention

[0004] One objective of this invention is to provide a horizontal well completion string that accurately controls the opening time of each control valve located in the vertical well section, preventing the gas used for gas lift in the casing from flowing back out of the well, and allowing the gas to enter the tubing from the casing under a suitable pressure environment, thereby improving the gas lift efficiency.

[0005] According to the present invention, a horizontal well completion string is provided, comprising a casing, tubing disposed within the casing, one or more control valves located in a vertical section and arranged on the tubing, a packer located in the vertical section for blocking gas inside the casing, and a main control module. Each control valve includes a controller connected to the main control module and an internal valve sensor and an external valve sensor respectively connected to the controller. The internal valve sensor detects pressure data inside the tubing and transmits it to the controller. The external valve sensor detects pressure data inside the casing and transmits it to the controller. The controller receives the pressure data and transmits it to the main control module. When the pressure data detected by the external valve sensor is greater than the pressure data detected by the internal valve sensor, the main control module controls the control valve to open via the controller, thereby connecting the inside of the casing with the inside of the tubing.

[0006] In a preferred embodiment, the system further includes a plurality of control valves located in a horizontal well section and a plurality of packers disposed in the horizontal well section, with one packer disposed between every two adjacent control valves located in the horizontal well section.

[0007] In a preferred embodiment, the system further includes a connection module connected to the main control module, wherein the control valve located in the horizontal well section and the control valve located in the vertical well section are both connected to the connection module.

[0008] In a preferred embodiment, the control valve includes a valve slot with a valve port, a valve core for opening and closing the valve port, and a telescopic mechanism connected to the valve core. The telescopic mechanism can drive the valve core to perform telescopic movements so that the valve core extends or leaves the valve port to close or open the control valve.

[0009] In a preferred embodiment, the control valve further includes a drive mechanism communicatively connected to the controller, the drive mechanism being connected to the telescopic mechanism and used to drive the telescopic mechanism to move the valve core.

[0010] In a preferred embodiment, the telescopic mechanism includes a rotor with a first end connected to the drive shaft of the drive mechanism and a second end having an internal thread, and a central rod with a first end having an external thread. The first end of the central rod is disposed inside the rotor and threadedly connected to the second end of the rotor, and the second end of the central rod is fixedly connected to the valve core.

[0011] In a preferred embodiment, the telescopic mechanism further includes a ball bearing and a sleeve, wherein the rotor, the central rod, and the ball bearing are all disposed within the sleeve, and the ball bearing abuts against the outer surface of the rotor and the inner surface of the sleeve.

[0012] In a preferred embodiment, the telescopic mechanism further includes a receiving portion disposed at the bottom of the sleeve and a sealing element disposed within the receiving portion. The receiving portion has a receiving channel inside, and the valve core can be stored in the receiving channel when retracted. The sealing element is sleeved on the outer surface of the valve core. The valve groove is connected to the bottom of the receiving portion. The internal valve sensor is disposed within the space enclosed by the valve groove, the receiving portion, and the oil pipe. The external valve sensor is disposed within the space enclosed by the valve groove, the receiving portion, and the sleeve.

[0013] In a preferred embodiment, the connection module is an optical fiber cable.

[0014] In a preferred embodiment, the packer is fitted over the outer surface of the tubing and is in sealed contact with both the tubing and the casing.

[0015] This invention comprises one or more control valves located in a vertical well section and arranged on the tubing. Each control valve includes a controller connected to a main control module and internal and external sensors connected to the controller. The internal sensor detects pressure data inside the tubing and transmits it to the controller, while the external sensor detects pressure data inside the casing and transmits it to the controller. The controller receives the pressure data and transmits it to the main control module. When the pressure data detected by the external sensor is greater than that detected by the internal sensor, the main control module controls the control valve to open, connecting the casing and the tubing. This invention can accurately control the opening time of each control valve in the vertical well section by comparing the pressure data from the internal and external sensors and opening the control valve when the external sensor detects a greater pressure. This prevents gas used for gas lift from flowing back out of the well, allowing gas to enter the tubing from the casing under suitable pressure, thus improving gas lift efficiency. Furthermore, this invention improves the utilization rate of the control valves by determining the activation sequence of each control valve in the vertical well section.

[0016] The present invention also uses a controller to receive pressure data and transmit it to the main control module. When the pressure data detected by the external sensor is greater than the pressure data detected by the internal sensor, the main control module controls the control valve to open through the controller to connect the inside of the casing with the inside of the oil pipe. This allows the control module to control the opening and closing of multiple control valves separately, avoiding the use of traditional mechanical methods to start the control valves and improving production efficiency.

[0017] This invention uses one or more control valves located in the vertical and horizontal well sections and arranged on the tubing. When the control valves are opened, they can connect the inside of the casing with the inside of the tubing. Each control valve is opened and closed by the main control module. Therefore, all fracturing, production and gas lift can be completed by running the horizontal well completion string of this invention down the well once, thereby improving production and maintenance efficiency.

[0018] This invention uses a packer between every two adjacent control valves in a horizontal well section. Each control valve is located between two packers. The packers can be used to block oil and gas in the casing, so that each control valve can be used to control the production of a horizontal well section. This allows for the production of any horizontal well section and achieves the goal of accurately determining the production of a horizontal well section.

[0019] This invention uses a telescopic mechanism to drive the valve core to telescopically extend or retract, so that the valve core extends or leaves the valve port to close or open the control valve, thereby improving the sealing performance of the valve port. Attached Figure Description

[0020] Figure 1 The overall structure of the horizontal well completion string according to the present invention is schematically shown;

[0021] Figure 2 A schematic diagram of the control valve according to the present invention in the closed state is shown.

[0022] Figure 3 A schematic diagram of the control valve according to the present invention in the open state is shown.

[0023] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0024] like Figure 1-3 As shown, the horizontal well completion string 100 of the present invention includes: a casing 1, a tubing 2 disposed within the casing 1, one or more control valves 3 located in the vertical section and arranged on the tubing 2, and a packer 4 located in the vertical section for blocking gas within the casing 1. The control valve 3, when opened, can connect the interior of the casing 1 with the interior of the tubing 2. The horizontal well includes a horizontal section and a vertical section. The horizontal section is the oil and gas production section. Oil and gas enter the tubing 2 from the bottom layer and flow out of the well via the tubing 2. When the oil and gas well cannot produce normally through self-flowing, it is necessary to discharge the oil and gas from the tubing 2 through gas lift, that is, to inject gas flow (e.g., natural gas or nitrogen) into the casing 1. By opening the control valve 3 located in the vertical section, the gas within the casing 1 enters the tubing 2 through the control valve 3, thereby driving the oil and gas within the tubing 2 to be discharged out of the well.

[0025] Because the vertical well section is equipped with a packer 4 to block the gas inside the casing 1, the gas flow injected into the casing 1 cannot reach the horizontal well section and only remains in the space above the packer 4. During the process of injecting gas flow into the casing 1 to achieve gas lift, the pressure inside the casing 1 increases, thus exceeding the pressure inside the tubing 2. By opening the control valve 3, the gas inside the casing 1 can enter the tubing 2 through the control valve 3, thereby driving the oil and gas in the tubing 2 to be discharged outside the well.

[0026] The horizontal well completion string 100 of the present invention also includes a main control module (not shown in the figure). The main control module can be an external control system. The control valve 3 includes a controller 34 connected to the main control module and an internal sensor 36 and an external sensor 37 connected to the controller 34 respectively. The internal sensor 36 is used to detect the internal pressure data of the tubing 2 at the location of the control valve 3 and transmit it to the controller 34. The external sensor 37 is used to detect the internal pressure data of the casing 1 at the location of the control valve 3 and transmit it to the controller 34. The controller 34 is used to receive the pressure data and transmit it to the main control module. When the pressure data detected by the external sensor 37 is greater than the pressure data detected by the internal sensor 36, the main control module controls the control valve 3 to open through the controller 34 to connect the inside of the casing 1 with the inside of the tubing 2.

[0027] During the gas lift process, if the control valve 3 in the vertical section is opened when the pressure data detected by the external sensor 37 is less than the pressure data detected by the internal sensor 36, the gas introduced into the casing 1 for gas lift may not be able to enter the tubing 2 for a long time under the pressure inside the tubing 2, or may even flow back out of the well, resulting in gas loss.

[0028] This invention comprises one or more control valves 3 located in a vertical well section and arranged on tubing 2. Each control valve 3 includes a controller 34 connected to a main control module and an internal sensor 36 and an external sensor 37 respectively connected to the controller 34. The internal sensor 36 detects pressure data inside the tubing 2 and transmits it to the controller 34, while the external sensor 37 detects pressure data inside the casing 2 and transmits it to the controller 34. The controller 34 receives the pressure data and transmits it to the main control module. Furthermore, when the pressure data detected by the external sensor 37 is greater than the pressure data detected by the internal sensor 36... At this time, the main control module controls the control valve 3 to open via the controller 34, thereby connecting the inside of the casing 1 with the inside of the tubing 2. This invention can accurately control the opening time of each control valve 3 located in the vertical well section by comparing the pressure data from the internal sensor 36 and the external sensor 37. When the pressure data detected by the external sensor 37 is greater than that detected by the internal sensor 36, the control valve 3 is opened. This prevents the gas used for gas lift in the casing 1 from flowing back out of the well, allowing the gas to enter the tubing 2 from inside the casing 1 under a suitable pressure environment, thus improving gas lift efficiency. This invention also improves the utilization rate of the control valves 3 by determining the activation sequence of each control valve 3 located in the vertical well section.

[0029] The present invention also uses a controller 34 to receive pressure data and transmit it to the main control module. When the pressure data detected by the external sensor 37 is greater than the pressure data detected by the internal sensor 36, the main control module controls the control valve 3 to open through the controller 34 to connect the inside of the sleeve 1 with the inside of the oil pipe 2. This allows the control module to control the opening and closing of multiple control valves 3 separately, avoiding the use of traditional mechanical methods to start the control valves 3 and improving production efficiency.

[0030] In one or more embodiments, multiple control valves 3 located in the vertical well section can be evenly arranged along the tubing 2. By controlling the opening of control valves 3 located at different positions in the vertical well section, gas lift can be achieved in different parts of the vertical well section.

[0031] In one or more embodiments, the horizontal well completion string 100 of the present invention further includes multiple control valves 3 located in the horizontal well section and multiple packers 4 disposed in the horizontal well section. A packer 4 is disposed between every two adjacent control valves 3 in the horizontal well section, and a horizontal well segment is formed between every two packers 4. After opening the control valve 3 in the horizontal section, the inside of the casing 1 can be connected to the inside of the tubing 2. During the sand fracturing process, sand is injected into the tubing 2. After opening the control valve 3 in the horizontal section, the sand injected into the tubing 2 can enter the casing 1 through the control valve 3 and enter the formation to achieve the fracturing process. When a segment of the horizontal well section needs to be fracturing, the control module can control the control valve 3 in that segment to open to achieve fracturing. After fracturing is completed, the control valve 3 in that segment is closed, thereby enabling fracturing of any horizontal well segment and achieving precise control of the fracturing area. During production logging, oil and gas in the formation enter casing 1. After the control valve 3 located in the horizontal section is opened, the oil and gas in casing 1 enter tubing 2 through the control valve 3.

[0032] This invention uses one or more control valves 3 located in the vertical and horizontal well sections and arranged on the tubing 2. When the control valves 3 are opened, they can connect the inside of the casing 1 with the inside of the tubing 2. Each control valve 3 is opened and closed by the main control module. Therefore, all fracturing, production and gas lift can be completed by running the horizontal well completion string 100 described in this invention down the well once, thereby improving production and maintenance efficiency.

[0033] This invention utilizes a packer 4 positioned between every two adjacent control valves 3 in a horizontal well section. Each control valve 3 is located between two packers 4. The packers 4 can block oil and gas in the casing, allowing each control valve 3 to control the production of one horizontal well section. During production, all control valves 3 of the horizontal well sections are first opened to obtain the total production Q of all segments in the horizontal well section. Then, the control valves 3 of segment X are closed, and the production Q1 after closing segment X is obtained. The production Qx of segment X is then calculated as Qx = Q - Q1. This method allows for the accurate determination of the production of any horizontal well section.

[0034] In one or more embodiments, a plurality of control valves 3 located in a horizontal well section may be evenly arranged along the tubing 2.

[0035] In one or more embodiments, the horizontal well completion string 100 of the present invention further includes a connection module 5 and a main control module (not shown in the figure) connected to the connection module 5. The control valve 3 located in the horizontal well section and the control valve 3 located in the vertical well section are both connected to the connection module 5. The main control module sends a start signal or a stop signal to the controller 34 of each control valve 3 through the connection module 5 to control the opening and closing of the control valve 3.

[0036] In one or more embodiments, the connection module 5 can be an optical fiber cable, and the control valve 3 also includes an interface 38. The optical fiber cable is connected to the control valve 3 through the interface 38 to supply power to the control valve 3 and transmit signals. The main control module can send start and stop signals through the optical fiber cable to control the opening and closing of each control valve 3. The optical fiber cable consists of an inner optical fiber and an outer cable. The optical fiber is used for data transmission, while the cable can transmit energy and low-end data information for downhole equipment. The optical fiber cable enables real-time monitoring of pressure, temperature, and acoustic waves in the entire horizontal well and provides power to the control valve 3. The main control module can control the opening and closing of the control valve 3 through the optical fiber cable to achieve gas lift and other operations.

[0037] In this invention, both the control valve 3 located in the horizontal well section and the control valve 3 located in the vertical well section are connected to the connection module 5. This allows the main control module to individually control the opening and closing of each control valve 3 through the connection module 5.

[0038] In one or more embodiments, the control valve 3 includes a valve groove 31 with a valve port 311, a valve core 32 for opening and closing the valve port 311, and a telescopic mechanism 33 connected to the valve core 32. The telescopic mechanism 33 can drive the valve core 32 to extend or retract, so that the valve core 32 extends or leaves the valve port 311 to close or open the control valve 3. Specifically, during the opening process of the control valve 3, the valve core 32 retracts under the action of the telescopic mechanism 33, and its end leaves the valve port 311 to open the valve port 311, thereby connecting the inside of the sleeve 1 with the inside of the oil pipe 2. During the closing process of the control valve 3, the end of the valve core 32 extends out of the valve port 311 under the action of the telescopic mechanism 33 to close the valve port 311, thereby isolating the internal space of the sleeve 1 from the internal space of the oil pipe 2.

[0039] The present invention uses the telescopic mechanism 33 to drive the valve core to telescopic movement, so that the valve core 32 extends or leaves the valve port 311 to close or open the control valve 3, thereby improving the sealing performance of the valve port 311.

[0040] In one or more embodiments, the control valve 3 further includes a drive mechanism 35 communicatively connected to the controller 34. The drive mechanism 35 is connected to the telescopic mechanism 33 and is used to drive the telescopic mechanism 33 to move the valve core 32. The main control module is used to transmit a start signal or a stop signal to the controller 34. The controller 34 is used to control the drive mechanism 35 to drive the telescopic mechanism 33 according to the start signal or the stop signal, so as to drive the valve core 32 to retract or extend.

[0041] The controller 34 can control the drive mechanism 35 to drive the telescopic mechanism 33 according to the start signal, so as to drive the valve core 32 to retract, causing the valve core 32 to leave the valve port 311, thereby opening the control valve 3. The controller 34 can also control the drive mechanism 35 to drive the telescopic mechanism 33 according to the close signal, so as to drive the valve core 32 to extend, causing the end of the valve core 32 to extend into the valve port 311, thereby closing the control valve 3.

[0042] In one or more embodiments, the telescopic mechanism 33 includes a rotor 331 with a first end connected to a drive shaft of a drive mechanism 35 and a second end having an internal thread, and a central rod 332 with a first end having an external thread. The first end of the central rod 332 is disposed inside the rotor 331 and threadedly connected to the second end of the rotor 331, and the second end of the central rod 332 is fixedly connected to the valve core 32. The rotor 331 may be constructed in a cylindrical shape, and the drive mechanism 35 may be a bidirectional motor. For example, the drive shaft of the drive mechanism 35 drives the rotor 331 to rotate clockwise, and the rotor 331 can drive the central rod 332 to move closer to the rotor 331 through the thread. The central rod 332 then drives the valve core 32 to retract, thereby moving away from the valve port 311, thus opening the control valve 3. The drive shaft of the drive mechanism 35 drives the rotor 331 to rotate counterclockwise, and the rotor 331 can drive the central rod 332 to move away from the rotor 331 through the thread. The central rod 332 then drives the valve core 32 to extend out of the valve port 311, thereby closing the control valve 3.

[0043] In one or more embodiments, the telescopic mechanism 33 further includes a rotating ball 333 and a sleeve 334. The rotor 331, the central rod 332 and the rotating ball 333 are all disposed inside the sleeve 334. The rotating ball 333 abuts against the outer surface of the rotor 331 and the inner surface of the sleeve 334.

[0044] The present invention has a rotor 331, a central rod 332 and a rotating ball 333 all disposed inside a sleeve 334. The rotating ball 333 abuts against the outer surface of the rotor 331 and the inner surface of the sleeve 334. While protecting the rotor 331 and the central rod 332, it can reduce the friction force on the rotor 331 during rotation.

[0045] In one or more embodiments, the telescopic mechanism 33 further includes a receiving portion 335 and a sealing element 336 disposed at the bottom of the sleeve 334. The receiving portion 335 has a receiving channel 3351 inside, and the valve core 32 can be stored in the receiving channel 3351 after retraction. The outer surface of the valve core 32 is fitted with the sealing element 336. The valve groove 31 is connected to the bottom of the receiving portion 335. The valve internal sensor 36 is disposed in the space enclosed by the valve groove 31, the receiving portion 335 and the oil pipe 2. The valve external sensor 37 is disposed in the space enclosed by the valve groove 31, the receiving portion 335 and the sleeve 1.

[0046] In one or more embodiments, the control valve 3 further includes a frame 337, which is disposed above and integrally formed with the receiving portion 335. The controller 34, the telescopic mechanism 33, and the drive mechanism 35 are all disposed within the space enclosed by the frame 337 and the receiving portion 335. The control valve 3 also includes a transmission line 338 disposed within the space enclosed by the frame 337 and the receiving portion 335, through which the controller 34 is connected to the internal sensor 36 and the external sensor 37.

[0047] In one or more embodiments, the packer 4 is fitted onto the outer surface of the tubing 2 and is in sealed contact with both the tubing 2 and the inner wall of the casing 1.

[0048] The following is a brief description of the operating conditions of the horizontal well completion string 100 described in this invention:

[0049] The connecting module 5, control valve 3, and packer 4 are lowered into the casing 1 along with the tubing 2. One or more control valves 3 are located in the vertical section and arranged on the tubing 2. The packer 4 located in the vertical section is used to block gas in the casing 1. A packer 4 is provided between every two adjacent control valves 3 in the horizontal section. Each control valve 3 is located between two packers 4. The main control module can control the opening and closing of each control valve 3 through the connecting module 5 to connect the inside of the casing 1 with the inside of the tubing 2.

[0050] During the sand fracturing process, sand is injected into tubing 2. The sand injected into tubing 2 can enter casing 1 through control valve 3 and enter the formation to realize the fracturing process. When a certain section of the horizontal well needs to be fracturing, the control module can control the control valve 3 in that section to open to realize fracturing. After the fracturing is completed, the control valve 3 in that section is closed. Fracturing can be performed on any horizontal well section to achieve precise control of the fracturing area.

[0051] During the production logging process, oil and gas in the formation enter the casing 1. The oil and gas in the casing 1 can enter the tubing 2 through the control valve 3 and be discharged outside the well. When a certain segment of the horizontal well section needs to be produced, the control module can control the control valve 3 in any segment to open. The oil and gas in the casing 1 enters the tubing 2 through the control valve 3 in that segment and is discharged outside the well, thereby obtaining the production of any segment of the horizontal well and achieving the purpose of accurately determining the production of the horizontal well section.

[0052] During the gas lift process, the control module compares the pressure data of the internal sensor 36 and the external sensor 37 of the control valve 3. When the pressure data detected by the external sensor 37 is greater than the pressure data detected by the internal sensor 36, the control valve 3 is opened. This controls the opening of the control valve 3 located in the vertical well section, preventing the gas used for gas lift in the casing 1 from flowing back out of the well. This allows the gas to enter the tubing 2 from inside the casing 1 under a suitable pressure environment, thereby improving the gas lift efficiency.

[0053] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A horizontal well completion string (100), comprising a casing (1), tubing (2) disposed within the casing (1), one or more control valves (3) located in a vertical section and arranged on the tubing (2), a packer (4) located in the vertical section for blocking gas within the casing (1), and a main control module. The control valve (3) includes a controller (34) connected to the main control module, and an internal sensor (36) and an external sensor (37) connected to the controller (34). The internal sensor (36) is used to detect the internal pressure data of the oil pipe (2) and transmit it to the controller (34). The external sensor (37) is used to detect the internal pressure data of the casing (1) and transmit it to the controller (34). The controller (34) is used to receive the pressure data and transmit it to the main control module. When the pressure data detected by the external sensor (37) is greater than the pressure data detected by the internal sensor (36), the main control module controls the control valve (3) to open through the controller (34) to connect the inside of the sleeve (1) with the inside of the oil pipe (2).

2. The horizontal well completion string according to claim 1, characterized in that, It also includes a plurality of control valves (3) located in the horizontal section and a plurality of packers (4) disposed in the horizontal section, with one packer (4) disposed between each two adjacent control valves (3) in the horizontal section.

3. The horizontal well completion string according to claim 2, characterized in that, It also includes a connection module (5) connected to the main control module, and the control valve (3) located in the horizontal well section and the control valve (3) located in the vertical well section are both connected to the connection module (5).

4. The horizontal well completion string according to claim 1, characterized in that, The control valve (3) includes a valve slot (31) with a valve port (311), a valve core (32) for opening and closing the valve port (311), and a telescopic mechanism (33) connected to the valve core (32). The telescopic mechanism (33) can drive the valve core (32) to perform telescopic movements, so that the valve core (32) extends or leaves the valve port (311) to close or open the control valve (3).

5. The horizontal well completion string according to claim 4, characterized in that, The control valve (3) also includes a drive mechanism (35) that is communicatively connected to the controller (34). The drive mechanism (35) is connected to the telescopic mechanism (33) and is used to drive the telescopic mechanism (33) to move the valve core (32).

6. The horizontal well completion string according to claim 5, characterized in that, The telescopic mechanism (33) includes a rotor (331) with a first end connected to the drive shaft of the drive mechanism (35) and a second end provided with an internal thread, and a center rod (332) with a first end provided with an external thread. The first end of the center rod (332) is located inside the rotor (331) and is threadedly connected to the second end of the rotor (331). The second end of the center rod (332) is fixedly connected to the valve core (32).

7. The horizontal well completion string according to claim 6, characterized in that, The telescopic mechanism (33) also includes a ball bearing (333) and a sleeve (334). The rotor (331), the central rod (332), and the ball bearing (333) are all disposed inside the sleeve (334). The ball bearing (333) abuts against the outer surface of the rotor (331) and the inner surface of the sleeve (334).

8. The horizontal well completion string according to claim 7, characterized in that, The telescopic mechanism (33) further includes a storage portion (335) disposed at the bottom of the sleeve (334) and a sealing member (336) disposed within the storage portion (335). The storage section (335) has a storage channel (3351) inside. The valve core (32) can be stored in the storage channel (3351) when it retracts. The sealing element (336) is sleeved on the outer surface of the valve core (32). The valve groove (31) is connected to the bottom of the storage section (335). The valve internal sensor (36) is disposed in the space enclosed by the valve groove (31), the storage section (335) and the oil pipe (2). The valve external sensor (37) is disposed in the space enclosed by the valve groove (31), the storage section (335) and the sleeve (1).

9. The horizontal well completion string according to claim 4, characterized in that, The connection module (5) is an optical fiber cable.

10. The horizontal well completion string according to claim 2, characterized in that, The packer (4) is fitted onto the outer surface of the oil pipe (2) and is in sealed contact with both the oil pipe (2) and the casing (1).

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