Self-centering type sand control screen pipe

Abstract

The invention relates to the technical field of petroleum and natural gas extraction downhole tools, and discloses a self-righting type sand control screen pipe which comprises a sand control screen pipe body. The automatic righting assembly is used for adjusting the installation position of the sand control screen pipe in real time so that the sand control screen pipe can be centered in a well hole, the sand control screen pipe is installed on the outer walls of the two ends of the sand control screen pipe, the monitoring and adjusting mechanisms are used for monitoring whether the sand control screen pipe deforms or not, and the number of the monitoring and adjusting mechanisms is multiple. After the sand control screen pipe is moved to a designated area, the automatic righting assembly adjusts the placement position of the sand control screen pipe in real time, the installation position of the sand control screen pipe is driven to be centered in a well hole, and in the using process of the sand control screen pipe, the monitoring and adjusting mechanism monitors the overall state of the sand control screen pipe in real time; the effect of automatically monitoring whether the surface of the sand control screen pipe deforms or not is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of downhole tools for oil and natural gas exploitation, and more particularly to a self-supporting sand control screen pipe. Background Art

[0002] During the development of oil and gas fields, sand production from the formation is a common problem, which can lead to a decrease in oil well production, equipment wear and even shutdown. As the core tool for downhole sand control, the installation position and structural stability of the sand control screen directly determine the sand control effect. Traditional sand control screens rely on manual adjustment or fixed stabilizers to ensure centering during installation, but due to the complex downhole environment, the screens are prone to offset or tilt, resulting in local sand accumulation, screen blockage or premature failure, seriously affecting the life of sand control. In addition, the screen may deform or even break under long-term high pressure, formation stress and sand scouring, and the existing technology lacks real-time monitoring means. Problems can only be inferred through periodic well repair operations or abnormal production data, resulting in delayed maintenance and high costs; Some current improvement plans improve the centering effect by adding fixed stabilizers or spring mechanisms to the outside of the screen. However, these devices cannot automatically adjust their position according to the dynamic environment downhole, increase structural complexity, and are prone to failure due to blocking or wear. In terms of deformation monitoring, the corresponding monitoring operations are mainly carried out manually using specific monitoring equipment. However, in actual operation, this monitoring process has problems such as high cost, complex deployment, and weak anti-interference ability, making it difficult to popularize in conventional sand control screens. Therefore, a self-supporting formal sand control screen pipe is urgently needed to solve the above-mentioned technical problems. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a self-supporting sand control screen to solve the problems existing in the above-mentioned background technology.

[0004] The present invention provides the following technical solutions: a self-supporting sand control screen, comprising: a sand control screen; An automatic righting assembly is used to adjust the installation position of the sand control screen in real time so that the sand control screen is centered in the wellbore, wherein the sand control screen is installed on the outer walls of both ends of the sand control screen; A monitoring and adjusting mechanism is used to monitor whether the sand control screen has deformed, wherein the monitoring and adjusting mechanism is provided in a plurality of groups, and the plurality of groups of monitoring and adjusting mechanisms are arranged in sequence at equal intervals along the axial direction of the inner peripheral wall of the sand control screen; After the sand control screen is moved to the designated area, the automatic righting assembly adjusts the placement position of the sand control screen in real time, driving the installation position of the sand control screen to be centered in the wellbore. During the use of the sand control screen, the monitoring and adjustment mechanism monitors the overall status of the sand control screen in real time.

[0005] Furthermore, the automatic righting assembly includes righting rings, wherein the outer side surfaces of two groups of righting rings are installed on the inner side surfaces of the wellbore, and the righting rings are respectively arranged at both ends of the sand control screen pipe, and the inner wall of each group of the righting rings is sequentially provided with a third hydraulic compartment, a first hydraulic compartment and a second hydraulic compartment along its top to its bottom, wherein the interiors of the third hydraulic compartment, the first hydraulic compartment and the second hydraulic compartment are all provided with corresponding amounts of hydraulic oil, and the third hydraulic compartment, the first hydraulic compartment and the second hydraulic compartment are in a state of mutual non-circulation.

[0006] Furthermore, each group of the straightening rings is equidistantly and movably connected to a plurality of sliding plates on the inner side surface near the position of the first hydraulic chamber, one end of the sliding plate is arranged inside the first hydraulic chamber, and a U-shaped connecting plate is installed on the other end of the sliding plate, and the outer side surface of the U-shaped connecting plate away from the position of the sliding plate is installed on the outer surface of the sand control screen.

[0007] Furthermore, first springs are vertically installed on both sides of one end of the sliding plate, and the end of the first spring away from the sliding plate position is vertically installed on the inner side of the first hydraulic chamber, wherein the first hydraulic chamber is provided with a first induction switch on the inner side near the first spring position, and the straightening ring body is provided with an input groove at a position adjacent to the sliding plate and the second hydraulic chamber, and a torsion spring plate adapted to it is installed inside the input groove, and a torsion spring device is provided at one end of the torsion spring plate, and a magnetic block is installed at the bottom of the sliding plate, wherein a magnetic plate is installed on the outer side of the torsion spring plate near the magnetic block position, and a magnetic repulsion force is generated between the magnetic block and the magnetic plate, and the hydraulic oil between the sliding plate and the second hydraulic chamber circulates with each other through the input groove, and telescopic plates are installed on the outer sides of both sides of the sliding plate.

[0008] Furthermore, a hydraulic oil supply device is installed inside the centralizing ring body, and a three-hole pipe is installed at the output end of the hydraulic oil supply device. The three-hole pipe includes two groups of output ports, one group of output ports is arranged inside the second hydraulic compartment, and the other group of output ports is arranged inside the third hydraulic compartment; The monitoring and adjusting mechanism comprises a plurality of groups of hollow plates, which are arranged in sequence and at equal intervals inside the sand control screen along the axis direction thereof.

[0009] Furthermore, the inner walls of multiple groups of the hollow plates are movably connected with limiting slides, the outer side of the limiting slide away from the position of the hollow plate is attached to the inner side of the sand control screen, and the limiting slide is vertically installed with a second spring on the side close to the corresponding position of the hollow plate, and one end of the second spring away from the position of the limiting slide is vertically installed on the inner side of the corresponding hollow plate, and a second induction switch is installed on the inner side of the hollow plate near the position corresponding to the second spring.

[0010] Furthermore, a main transmission pipe is provided inside the third hydraulic compartment, and the end of the main transmission pipe away from the position of the third hydraulic compartment vertically passes through the interior of the corresponding hollow plate, and an auxiliary transmission pipe is installed between each group of adjacent hollow plates for transmitting hydraulic oil inside each group of hollow plates.

[0011] Technical effects and advantages of the present invention: The present invention uses an automatic straightening assembly to adjust the placement of the sand control screen in real time after the sand control screen is moved to a designated area, driving the installation position of the sand control screen to be centered in the wellbore. During the use of the sand control screen, the monitoring and adjustment mechanism monitors the overall state of the sand control screen in real time, thereby automatically monitoring whether the surface of the sand control screen is deformed.

[0012] The present invention squeezes the corresponding second induction switch during the movement of the limit slide, and the second induction switch sends an early warning message to the control component. The control component determines that the sand control screen is deformed at that position, and the control component controls the hydraulic oil providing device to input a stable working current, drives the hydraulic oil inside the device to be transmitted to the interior through another group of output ports of the three-hole pipe, and then moves through the corresponding main transmission pipe to the interior of the hollow plate at the inclined position of the sand control screen, controls the corresponding limit slide to generate corresponding extrusion force, and transmits it to the position of the sand control screen at the deformation, so as to achieve the effect of temporary limitation and emergency repair of the deformed area of ​​the sand control screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic top view of the overall structure of the present invention; Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point A is shown; Figure 4 for Figure 2 The overall structural diagram of the righting ring is shown; Figure 5 for Figure 4 A side cross-sectional view of the structure of the righting ring shown; Figure 6 for Figure 5 The overall structural diagram of the sliding plate shown; Figure 7 for Figure 3 A partial structural diagram of the detection and adjustment mechanism shown; Figure 8 for Figure 7 An enlarged schematic diagram of the structure at point B is shown; Figure 9 for Figure 8 A side cross-section of a hollow core slab is shown.

[0014] The accompanying drawings are marked as follows: 1. Sand control screen; 2. Automatic righting assembly; 201. Righting ring; 202. Sliding plate; 2021. Telescopic plate; 203. U-shaped connecting plate; 204. First hydraulic compartment; 205. Second hydraulic compartment; 206. Torsion spring plate; 207. Hydraulic oil supply device; 208. Three-hole pipe; 209. First spring; 210. First induction switch; 211. Magnetic block; 2012. Third hydraulic compartment; 3. Monitoring and adjustment mechanism; 301. Hollow plate; 302. Main transmission pipe; 303. Auxiliary transmission pipe; 304. Second induction switch; 305. Limiting slide plate; 306. Second spring. DETAILED DESCRIPTION

[0015] The technical solutions of the present invention will be described clearly and completely below with reference to the accompanying drawings. Furthermore, the various structural forms described in the following embodiments are merely illustrative. The self-supporting sand control screen pipe of the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0016] Reference Figures 1 to 2 As shown, the present invention provides a self-supporting sand control screen, comprising a sand control screen 1; An automatic straightening assembly 2 is used to adjust the installation position of the sand control screen 1 in real time so that the sand control screen 1 is centered in the wellbore, wherein the sand control screen 1 is installed on the outer walls of both ends of the sand control screen 1; A monitoring and adjusting mechanism 3 is used to monitor whether the sand control screen 1 is deformed, wherein the monitoring and adjusting mechanism 3 is provided in a plurality of groups, and the plurality of groups of monitoring and adjusting mechanisms 3 are arranged in sequence at equal intervals along the axial direction of the inner peripheral wall of the sand control screen 1; After the sand control screen 1 is moved to the designated area, the automatic righting assembly 2 adjusts the placement position of the sand control screen 1 in real time, driving the installation position of the sand control screen 1 to be centered in the wellbore. During the use of the sand control screen 1, the monitoring and adjustment mechanism 3 monitors the overall status of the sand control screen 1 in real time.

[0017] In the real-time example of this application, the specific working process of the embodiment of this part of the application is: after the sand control screen 1 moves to the designated area, the automatic righting component 2 adjusts the placement position of the sand control screen 1 in real time, driving the installation position of the sand control screen 1 to be centered in the wellbore. During the use of the sand control screen 1, the monitoring and adjustment mechanism 3 monitors the overall state of the sand control screen 1 in real time, so as to achieve the effect of automatically monitoring whether the surface of the sand control screen 1 is deformed.

[0018] Reference Figures 1 to 6As shown, the present invention provides a self-supporting sand control screen. The automatic righting assembly 2 includes righting rings 201, wherein the outer side surfaces of two groups of righting rings 201 are mounted on the inner side surface of the wellbore, and the righting rings 201 are respectively arranged at both ends of the sand control screen 1. The inner wall of each group of righting rings 201 is provided with 2012, a first hydraulic chamber 204, and a second hydraulic chamber 205 in sequence from the top to the bottom thereof, wherein corresponding amounts of hydraulic oil are provided in the interiors of 2012, the first hydraulic chamber 204, and the second hydraulic chamber 205, and there is no flow between 2012, the first hydraulic chamber 204, and the second hydraulic chamber 205. Each group of the straightening rings 201 has multiple groups of sliding plates 202 movably sleeved in sequence and at equal intervals on the inner side surface near the first hydraulic chamber 204. One end of the sliding plate 202 is arranged inside the first hydraulic chamber 204, and the other end of the sliding plate 202 is installed with a U-shaped connecting plate 203. The outer side of the U-shaped connecting plate 203 away from the sliding plate 202 is installed on the outer surface of the sand control screen 1. First springs 209 are vertically installed on both sides of one end of the sliding plate 202, and one end of the first spring 209 away from the sliding plate 202 is vertically installed on the inner side of the first hydraulic chamber 204, wherein the first hydraulic chamber 204 is provided with a first sensing switch 210 on the inner side near the first spring 209, and the straightening ring 201 is provided with an input slot at a position adjacent to the sliding plate 202 and the second hydraulic chamber 205, and a torsion spring plate 206 adapted thereto is installed inside the input slot, and a torsion spring device is provided at one end of the torsion spring plate 206, and a magnetic block 211 is installed at the bottom of the sliding plate 202, wherein a magnetic plate is installed on the outer side of the torsion spring plate 206 near the position of the magnetic block 211, and a magnetic repulsion force is generated between the magnetic block 211 and the magnetic plate, and the hydraulic oil between the sliding plate 202 and the second hydraulic chamber 205 circulates with each other through the input slot, and telescopic plates 2021 are installed on the outer sides of both sides of the sliding plate 202; A hydraulic oil supply device 207 is installed inside the straightening ring 201, and a three-hole pipe 208 is installed at the output end of the hydraulic oil supply device 207. The three-hole pipe 208 includes two groups of output ports, one group of output ports is arranged inside the second hydraulic compartment 205, and the other group of output ports is arranged inside 2012.

[0019] In the embodiment of the present application, a control component is provided inside the automatic righting component 2, and a communication module is provided inside the control component for remotely reminding staff to arrive at the site for inspection.

[0020] The specific working process of the embodiment of this part of the application is as follows: after the centralizing ring 201 is normally installed in the wellbore, if the sand and gravel and other impurities inside the oil well are squeezed onto the surface of the sand control screen 1, the installation position of the sand control screen 1 is driven to be in an inclined state; The sand control screen 1 in the tilted state will drive the corresponding set of U-shaped connecting plates 203 and sliding plates 202 to move toward the position of the straightening ring 201. During the movement of the sliding plates 202, the corresponding first induction switches 210 will be contacted. The first induction switches 210 will send an early warning signal to the control component. The corresponding set of sliding plates 202 will drive the magnetic block 211 at the bottom thereof to move to the surface of the torsion spring plate 206. A magnetic repulsive force will be generated between the magnetic block 211 and the magnetic plate on the surface of the torsion spring plate 206, driving the set of torsion spring plates 206 to be in the open state. At the same time, the control group The component controls the hydraulic oil supply device 207 to input a stable working current, drives the hydraulic oil inside the hydraulic oil supply device 207 to be input into the interior of the second hydraulic compartment 205 through a group of output ports of the three-hole pipe 208, drives the hydraulic oil inside the second hydraulic compartment 205 to be input into the corresponding first hydraulic compartment 204 through the input slot in the open state, drives the corresponding group of sliding plates 202 and U-shaped connecting plates 203 to move toward the inclined side of the sand control screen 1, controls the installation position of the sand control screen 1 to be adjusted in real time, and achieves the technical effect of automatically adjusting the installation position of the sand control screen 1.

[0021] Reference Figures 1 to 3 as well as Figures 6 to 9 As shown, the present invention provides a self-supporting formal sand control screen. The monitoring and adjustment mechanism 3 includes multiple groups of hollow plates 301, which are equidistantly arranged inside the sand control screen 1 along the axial direction thereof. The inner walls of the multiple groups of hollow plates 301 are movably sleeved with limiting slides 305. The outer side surfaces of the limiting slides 305 away from the positions of the hollow plates 301 are attached to the inner side surfaces of the sand control screen 1. The limiting slides 305 are vertically mounted on the side surfaces corresponding to the positions of the hollow plates 301. One end of the second spring 306 away from the position of the limiting slides 305 is vertically mounted on the inner side surfaces corresponding to the hollow plates 301. A second induction switch 304 is mounted on the inner side surfaces of the hollow plates 301 near the positions corresponding to the second springs 306. A main transmission pipe 302 is provided inside the 2012, and the end of the main transmission pipe 302 away from the position 2012 vertically passes through the interior of the corresponding hollow plate 301, and an auxiliary transmission pipe 303 is installed between each group of adjacent hollow plates 301 for transmitting the hydraulic oil inside each group of hollow plates 301.

[0022] In the embodiment of the present application, a certain amount of hydraulic oil is stored inside each group of hollow plates 301. Under the action of a certain amount of hydraulic oil and the spring force of the corresponding second spring 306, each group of limiting slides 305 is attached to the inner side surface of the hollow plate 301. Therefore, when excess hydraulic oil is transmitted to the interior of the hollow plate 301, it cannot drive the corresponding limiting slide 305 to move.

[0023] The specific working process of the embodiment of this part of the application is as follows: when the sand control screen 1 is affected by external sand and gravel and a part of the sand control screen 1 is deformed, the deformed area will drive the corresponding limiting slide 305 to move to the position of the corresponding hollow plate 301. During the movement of the limiting slide 305, the corresponding second sensing switch 304 will be squeezed. The second sensing switch 304 will send an early warning information to the control component. The control component determines that the position of the sand control screen 1 is deformed, and controls the hydraulic oil supply device 207 to input a stable working current, driving the hydraulic oil inside the hydraulic oil supply device 207 to be transmitted to the inside of 2012 through another group of output ports of the three-hole pipe 208, and then moves to the inside of the hollow plate 301 at the tilted position of the sand control screen 1 through the corresponding main transmission pipe 302, controlling the corresponding limiting slide 305 to generate a corresponding squeezing force, and transmitting it to the deformed position of the sand control screen 1, thereby achieving the effect of temporary limiting and emergency repair of the deformed area of ​​the sand control screen 1. When the hydraulic oil supply device 207 works for more than 30 seconds and the corresponding first sensing switch 210 is still in the triggered state, the communication module in the control component sends an early warning message to remotely remind the staff to arrive at the site for inspection.

[0024] The specific workflow of this application is as follows: Position adjustment: After the straightening ring 201 is normally installed in the wellbore, if the sand and gravel and other impurities inside the oil well are squeezed onto the surface of the sand control screen 1, the installation position of the sand control screen 1 is driven to be in an inclined state; The sand control screen 1 in the tilted state will drive the corresponding set of U-shaped connecting plates 203 and sliding plates 202 to move toward the position of the straightening ring 201. During the movement of the sliding plates 202, the corresponding first induction switches 210 will be contacted. The first induction switches 210 will send an early warning signal to the control component. The corresponding set of sliding plates 202 will drive the magnetic block 211 at the bottom thereof to move to the surface of the torsion spring plate 206. A magnetic repulsive force will be generated between the magnetic block 211 and the magnetic plate on the surface of the torsion spring plate 206, driving the set of torsion spring plates 206 to be in the open state. At the same time, the control group The component controls the hydraulic oil supply device 207 to input a stable working current, driving the hydraulic oil inside the device to be input into the second hydraulic compartment 205 through a group of output ports of the three-hole pipe 208, driving the hydraulic oil inside the second hydraulic compartment 205 to be input into the corresponding first hydraulic compartment 204 through the input slot in the open state, driving the corresponding group of sliding plates 202 and U-shaped connecting plates 203 to move toward the inclined side of the sand control screen 1, controlling the installation position of the sand control screen 1 to be adjusted in real time, thereby achieving the technical effect of automatically adjusting the installation position of the sand control screen 1; Deformation monitoring: When the sand screen 1 is deformed in a part of its area under the influence of external sand and gravel, the deformed area will drive the corresponding limiting slide 305 to move to the position of the corresponding hollow plate 301. During the movement of the limiting slide 305, the corresponding second sensing switch 304 will be squeezed. The second sensing switch 304 will send an early warning message to the control component. The control component determines that the position of the sand screen 1 is deformed, and controls the hydraulic oil supply device 207 to input a stable working current, driving the hydraulic oil inside it to be transmitted to the inside of 2012 through another set of output ports of the three-hole pipe 208, and then move to the inside of the hollow plate 301 at the inclined position of the sand screen 1 through the corresponding main transmission pipe 302, controlling the corresponding limiting slide 305 to generate corresponding squeezing force, and transmitting it to the deformed position of the sand screen 1, thereby achieving the effect of temporary limiting and emergency repair of the deformed area of ​​the sand screen 1; When the hydraulic oil supply device 207 works for more than 30 seconds and the corresponding first sensing switch 210 is still in the triggered state, the communication module in the control component sends an early warning message to remotely remind the staff to arrive at the site for inspection.

[0025] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change. Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict. Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-supporting sand control screen, characterized in that: include: Sand control screen (1); An automatic straightening assembly (2) for adjusting the installation position of the sand control screen (1) in real time so that the sand control screen (1) is centered in the wellbore, wherein the sand control screen (1) is installed on the outer walls of both ends of the sand control screen (1); A monitoring and adjusting mechanism (3) is used to monitor whether the sand control screen (1) is deformed, wherein the number of the monitoring and adjusting mechanisms (3) is multiple, and the multiple monitoring and adjusting mechanisms (3) are arranged in sequence at equal intervals along the axial direction of the inner peripheral wall of the sand control screen (1); After the sand control screen (1) is moved to the designated area, the automatic straightening assembly (2) adjusts the placement position of the sand control screen (1) in real time, driving the installation position of the sand control screen (1) to be centered in the wellbore. During the use of the sand control screen (1), the monitoring and adjusting mechanism (3) monitors the overall state of the sand control screen (1) in real time.

2. The self-supporting sand control screen according to claim 1, characterized in that: The automatic righting assembly (2) comprises a righting ring (201), wherein the outer side surfaces of two groups of righting rings (201) are mounted on the inner side surfaces of the wellbore, and the righting rings (201) are respectively arranged at both ends of the sand control screen (1), and the inner wall of each group of righting rings (201) is provided with a third hydraulic chamber (2012), a first hydraulic chamber (204) and a second hydraulic chamber (205) in sequence from the top to the bottom thereof, wherein the interiors of the third hydraulic chamber (2012), the first hydraulic chamber (204) and the second hydraulic chamber (205) are all provided with corresponding amounts of hydraulic oil, and the third hydraulic chamber (2012), the first hydraulic chamber (204) and the second hydraulic chamber (205) are in a non-circulating state with each other.

3. The self-supporting sand control screen according to claim 2, characterized in that: Each group of the straightening rings (201) is equidistantly and movably connected to a plurality of sliding plates (202) on the inner side surface near the first hydraulic chamber (204), one end of the sliding plate (202) is arranged inside the first hydraulic chamber (204), and the other end of the sliding plate (202) is installed with a U-shaped connecting plate (203), and the outer side surface of the U-shaped connecting plate (203) away from the sliding plate (202) is installed on the outer surface of the sand control screen (1).

4. The self-supporting sand control screen according to claim 3, characterized in that: The first spring (209) is vertically installed on both sides of one end of the sliding plate (202), and the end of the first spring (209) away from the sliding plate (202) is vertically installed on the inner side of the first hydraulic chamber (204), wherein the first hydraulic chamber (204) is installed with a first induction switch (210) on the inner side near the position of the first spring (209), and the straightening ring (201) is provided with an input groove at a position adjacent to the sliding plate (202) and the second hydraulic chamber (205), and the input groove is installed with a first induction switch (210) A torsion spring plate (206) is provided at one end of the torsion spring plate (206), a magnetic block (211) is installed at the bottom of the sliding plate (202), wherein a magnetic plate is installed on the outer side of the torsion spring plate (206) near the position of the magnetic block (211), and a magnetic repulsion force is generated between the magnetic block (211) and the magnetic plate, the hydraulic oil between the sliding plate (202) and the second hydraulic chamber (205) is mutually circulated through the input groove, and the outer side surfaces on both sides of the sliding plate (202) are installed with telescopic plates (2021).

5. The self-supporting sand control screen according to claim 2, characterized in that: A hydraulic oil supply device (207) is installed inside the straightening ring (201), and a three-hole pipe (208) is installed at the output end of the hydraulic oil supply device (207). The three-hole pipe (208) includes two groups of output ports, one group of output ports is arranged inside the second hydraulic compartment (205), and the other group of output ports is arranged inside the third hydraulic compartment (2012); The monitoring and adjusting mechanism (3) comprises a plurality of groups of hollow plates (301), and the plurality of groups of hollow plates (301) are sequentially and equidistantly arranged inside the sand control screen (1) along the axial direction thereof.

6. The self-supporting sand control screen according to claim 5, characterized in that: The inner walls of the plurality of groups of hollow plates (301) are all movably sleeved with limiting slides (305), the outer side surface of the limiting slide (305) away from the position of the hollow plate (301) is attached to the inner side surface of the sand control screen (1), the limiting slide (305) is vertically installed with a second spring (306) on the side surface close to the position corresponding to the hollow plate (301), one end of the second spring (306) away from the position of the limiting slide (305) is vertically installed on the inner side surface of the corresponding hollow plate (301), and a second induction switch (304) is installed on the inner side surface of the hollow plate (301) at a position close to the corresponding second spring (306).

7. The self-supporting sand control screen according to claim 6, characterized in that: A main transmission pipe (302) is provided inside the third hydraulic compartment (2012), and one end of the main transmission pipe (302) away from the third hydraulic compartment (2012) vertically penetrates the interior of the corresponding hollow plate (301), and an auxiliary transmission pipe (303) is installed between each group of adjacent hollow plates (301) for transmitting hydraulic oil inside each group of hollow plates (301).

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