Slip screen sand control device and string

Abstract

The application belongs to the technical field of oil exploitation, and particularly relates to a sliding sleeve screen pipe sand prevention device and a pipe column. An upper joint, a filter screen pipe and a lower joint of the sliding sleeve screen pipe sand prevention device are sequentially connected in the vertical direction to form an operation space, a plurality of filter pieces are arranged on the peripheral surface of the filter screen pipe at intervals, a sliding sleeve is movably and movably matched arranged in the operation space, a plurality of sealing pieces are arranged on the peripheral surface of the sliding sleeve, the sealing pieces and the filter pieces are correspondingly arranged, and the sealing pieces can operatively block the corresponding filter pieces. The sliding sleeve screen pipe sand prevention device provided by the application can prevent sand-carrying liquid and formation liquid from entering the inside of the screen pipe from the sliding sleeve screen pipe to the greatest extent, can satisfy the functions of filling and closing the sliding sleeve at one time, is simple to operate, does not increase operation procedures, is short in operation time, is low in cost and has good practicability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil exploitation, and particularly relates to a sliding sleeve screen pipe sand prevention device and a pipe string. BACKGROUND

[0002] At present, in the field of oil sand prevention technology, gravel packing sand prevention technology is widely applied due to its good sand prevention effect and applicability to fine silt formation. For oil and gas wells with large interlayer contradictions and multiple layers requiring separate layer oil production, segmented gravel packing sand prevention pipe strings or general gravel packing blind pipe isolation segmented pipe strings are mainly used to achieve the purpose.

[0003] The segmented gravel packing sand prevention pipe string mainly uses an intermediate isolation packer to achieve interlayer isolation, but the pipe string structure is complex, and gravel packing operations need to be carried out multiple times according to the number of segmented oil wells, the operation time is long, and the pipe string cost and operation cost are greatly increased. SUMMARY

[0004] To solve the above technical problems, the application provides a sliding sleeve screen pipe sand prevention device and a pipe string to solve the technical problem of long operation cycle of multiple times of pulling and running sand prevention pipe strings and multiple times of sand washing operations during sand prevention operations.

[0005] The technical scheme of the application is as follows:

[0006] In the first aspect of the application, a sliding sleeve screen pipe sand prevention device is disclosed, which comprises an upper joint, a filter screen pipe and a lower joint, which are sequentially connected in the vertical direction to form an operation space, a plurality of filter elements are arranged on the circumferential surface of the filter screen pipe at intervals; a sliding sleeve is movably and cooperatively arranged in the operation space, a plurality of sealing elements are arranged on the outer circumferential surface of the sliding sleeve, the sealing elements and the filter elements are correspondingly arranged, and the sealing elements can operatively block the corresponding filter elements.

[0007] The sliding sleeve screen pipe sand prevention device provided by the application has the same function as the ordinary screen pipe, has certain flow performance and sand blocking performance, and is convenient for gravel packing operation, because the filter screen pipe of the device is provided with a plurality of filter elements arranged at intervals on the circumferential surface, and the filter screen pipe has the same function as the ordinary screen pipe under the condition that the sealing elements do not block the corresponding filter elements. After the gravel packing operation is completed, the sliding sleeve is moved, the sealing elements on the outer circumferential surface of the sliding sleeve block the corresponding filter elements, the formation fluid cannot enter the inside of the filter screen pipe after flowing through the filter elements, sand-carrying liquid and formation liquid can be prevented from entering the inside of the screen pipe from the sliding sleeve screen pipe to the maximum extent, the functions of filling and closing the sliding sleeve can be satisfied at one time, the operation is simple, no operation process is added, the operation time is short, the cost is low, and the application has good practicability.

[0008] In some embodiments, a plurality of sealing grooves corresponding to the sealing members are arranged on the peripheral surface of the sliding sleeve, and the sealing members are arranged in the corresponding sealing grooves, and the sealing members have sealing portions protruding from the surfaces of the sealing grooves.

[0009] In some embodiments, a support protrusion is arranged on the inner wall of the upper joint, and a plurality of support blocks are arranged on the outer peripheral surface of the top end of the sliding sleeve and can be hung on the support protrusion.

[0010] In some embodiments, a first guide inclined surface is arranged on the outer peripheral surface of the top of the support block, and the bottom end of the support block is perpendicular to the outer peripheral surface of the support block.

[0011] In some embodiments, the top end of the support protrusion is perpendicular to the inner wall of the support protrusion, and a second guide inclined surface is arranged on the inner wall of the bottom end of the support protrusion.

[0012] In some embodiments, the upper joint is provided with a limiting groove, the top end of the support protrusion is the lower side wall of the limiting groove, and the upper side wall of the limiting groove is perpendicular to the central axis of the upper joint.

[0013] In some embodiments, the device further comprises a sleeve arranged on the outer peripheral surface of the filter screen pipe and between the upper joint and the lower joint, the sleeve expands under the condition of contacting liquid, and the sleeve is provided with a plurality of communication portions corresponding to the filter members.

[0014] In some embodiments, the upper joint and the top of the filter screen pipe are connected by threads.

[0015] In some embodiments, the lower joint and the bottom of the filter screen pipe are connected by threads.

[0016] In the second aspect of the present application, the present application further provides a pipe string, which comprises: a packer; a screen pipe, the top end of which is connected to the packer, and the middle part of which is provided with the sliding sleeve screen pipe sand prevention device described above; and a tubing arranged in the screen pipe and connected to the sliding sleeve to drive the sliding sleeve to move in the working space.

[0017] The pipe column provided by the application has the same function as the ordinary screen pipe, has certain flow performance and sand blocking performance, and is convenient for gravel packing operation, because the plurality of filter members are arranged on the circumferential surface of the filter screen pipe at intervals, and the filter screen pipe has the same function as the ordinary screen pipe under the condition that the sealing member does not block the corresponding filter member; after the gravel packing operation is completed, the sliding sleeve is moved, the sealing member on the outer circumferential surface of the sliding sleeve blocks the corresponding filter member, and the formation fluid cannot enter the inside of the filter screen pipe after flowing through the filter member, so that the sand-carrying fluid and the formation fluid can be prevented from entering the inside of the screen pipe from the sliding sleeve screen pipe to the largest extent, the functions of packing and closing the sliding sleeve can be satisfied at one time, the operation is simple, no operation process is increased, the operation time is short, the cost is low, and good practicability is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0019] In the drawings:

[0020] Figure 1 A structure schematic view of a sliding sleeve screen pipe sand prevention device disclosed by the embodiment of the application in a packing operation state;

[0021] Figure 2 A structure schematic view of a sliding sleeve screen pipe sand prevention device disclosed by the embodiment of the application in a closed state;

[0022] Figure 3 A structure schematic view of a sliding sleeve screen pipe sand prevention device disclosed by the embodiment of the application in a closed state; Figure 2 An enlarged schematic view of A in the drawings;

[0023] Figure 4 A structure schematic view of a sliding sleeve screen pipe sand prevention device disclosed by the embodiment of the application in a closed state; Figure 1 An enlarged schematic view of A in the drawings; Figure 2 A structure schematic view of a sliding sleeve screen pipe sand prevention device disclosed by the embodiment of the application in a closed state;

[0024] Figure 5 A structure schematic view of a sliding sleeve screen pipe sand prevention device disclosed by the embodiment of the application in a closed state; Figure 4 A structure schematic view of a sliding sleeve screen pipe sand prevention device disclosed by the embodiment of the application in a closed state.

[0025] Reference signs:

[0026] Upper joint-100, support protrusion-101, second guide inclined surface-1011, limiting groove-102;

[0027] Filter screen pipe-200, filter member-201,

[0028] Lower joint-300;

[0029] Slip sleeve-400, sealing element-401, sealing groove-402, support block-403, first guide inclined surface-4031, liquid passage hole-404;

[0030] Casing-500, communication part-501;

[0031] Packer-600;

[0032] Screen pipe-700;

[0033] Tubing-800. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0035] It should be noted that all directionality indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition and the like between components in a certain posture, and if the certain posture changes, the directionality indications also change accordingly.

[0036] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the components and arrangements of the various examples are described in the following detailed description. These are, of course, merely examples and are not intended to limit the application from that described. Furthermore, the application can be implemented in a wide variety of environments and contexts. Furthermore, the application provides various examples of the specific processes and materials employed, but one of ordinary skill in the art will recognize that other processes can be applied and / or other materials employed.

[0037] The present application will be described below with reference to the accompanying drawings and with reference to specific embodiments:

[0038] The embodiments of the present application provide a sliding sleeve screen pipe sand control device and a pipe string, which to some extent solve the technical problem of long operation cycle of multiple tripping and sand flushing operations during sand control operation.

[0039] In a first aspect of the present application, the embodiments of the present application disclose a sliding sleeve screen pipe sand control device. Figure 1 A structural schematic diagram of a sliding sleeve screen pipe sand control device disclosed by the embodiments of the present application in a filling operation state, Figure 2A structural schematic diagram of a sliding sleeve screen sand control device disclosed in the embodiments of the present application in a closed state is shown in FIG. 1. Figures 1-2 The device comprises an upper joint 100, a filter screen 200 and a lower joint 300 connected in sequence along the vertical direction.

[0040] It should be noted that when the device is not in use, for example, during assembly and manufacturing, the upper joint 100, the filter screen 200 and the lower joint 300 of the device can also be arranged in the horizontal direction or at an angle, which is not limited herein.

[0041] In the embodiments of the present application, the upper joint 100, the filter screen 200 and the lower joint 300 are connected in sequence to form a working space. The upper joint 100 is threadedly connected to the top end of the filter screen 200, and the upper joint 100 and the top of the filter screen 200 are sealed by a sealing ring or other means. The filter screen 200 can be a slotted screen 700 or an elastic screen 700 or other monomer screen 700 structure. The outer diameter of the filter screen 200 can be smaller than the outer diameter of the upper joint 100, so that the upper joint 100 is connected to the outside of the top of the filter screen 200. The bottom of the filter screen 200 is threadedly connected to the lower joint 300, and the bottom of the filter screen 200 and the lower joint 300 are sealed by a sealing ring or other means. The outer diameter of the filter screen 200 can be greater than the outer diameter of the lower joint 300, so that the lower joint 300 is connected to the inside of the bottom of the filter screen 200.

[0042] In combination with Figure 1 and Figure 2 a plurality of filter elements 201 are arranged on the circumferential surface of the filter screen 200 at intervals. The filter screen 200 has the same function as the ordinary screen 700 without being blocked, i.e., has certain flow performance and sand retention performance, so as to facilitate gravel packing operation.

[0043] In combination with Figure 1 and Figure 2The device further comprises a sliding sleeve 400 which is operatively and movably arranged in the working space, and a plurality of liquid passing holes 404 and a plurality of sealing members 401 are arranged on the outer circumferential surface of the sliding sleeve 400, the sealing members 401 and the filter members 201 are correspondingly arranged, and the sealing members 401 can operatively block the corresponding filter members 201. During the filling operation, the sealing members 401 and the corresponding filter members 201 are staggered, the formation fluid carrying sand passes through the filter members 201 on the filter screen pipe 200 and the liquid passing holes 404 on the sliding sleeve 400 to enter the inside of the pipe string, so as to ensure the compactness of the gravel packing outside the pipe string; after the filling is completed, the sliding sleeve 400 is moved, the sealing members 401 on the outer circumferential surface of the sliding sleeve 400 block the corresponding filter members 201 to seal the filter members 201, and after the formation fluid passes through the filter members 201, the formation fluid cannot enter the inside of the filter screen pipe 200, so that the filter screen pipe 200 forms a blind pipe, the sand-carrying fluid and the formation fluid can be prevented from entering the inside of the screen pipe 700 from the sliding sleeve 400 and the screen pipe 700, the functions of filling and closing the sliding sleeve 400 can be satisfied at one time, the operation is simple, the operation process is not increased, the operation time is short, the cost is low, and good practicability is achieved.

[0044] In combination Figure 1 and Figure 2 , a plurality of sealing grooves 402 corresponding to the sealing members 401 are arranged on the circumferential surface of the sliding sleeve 400, the sealing members 401 are arranged in the corresponding sealing grooves 402, and the sealing members 401 have sealing parts protruding from the surfaces of the sealing grooves 402. During the filling operation, the sealing parts on the sealing members 401 are tightly attached to the inner wall of the filter screen pipe 200, the formation fluid flowing into the filter screen pipe 200 from the filter members 201 on the filter screen pipe 200 can enter the area between the sliding sleeve 400 and the filter screen pipe 200, and can only enter the inside of the pipe string from the plurality of liquid passing holes 404 on the sliding sleeve 400; after the filling operation is completed, the sealing members 401 move with the sliding sleeve 400, the sealing parts on the sealing members 401 block the corresponding filter members 201 to seal the filter members 201, and the formation fluid cannot enter the inside of the screen pipe 700 through the filter members 201.

[0045] In some embodiments, the sealing members 401 can be O-shaped sealing rings, and one sealing member 401 can be correspondingly arranged in one sealing groove 402; in other embodiments, if the size of the sealing groove 402 is too large, a plurality of sealing members 401 can be filled in one sealing groove 402, so that the sealing members 401 are firmly arranged in the corresponding sealing grooves 402, and the sealing members 401 are prevented from falling off from the corresponding sealing grooves 402 when the sliding sleeve 400 is moved.

[0046] Figure 3 is an enlarged schematic view of A in Figure 2 In combination Figures 1-3In some embodiments, a support protrusion 101 can be arranged on the inner wall of the upper joint 100, and a plurality of support blocks 403 can be arranged on the outer circumferential surface of the top end of the sliding sleeve 400 and can be hung on the support protrusion 101. The support protrusion 101 is preferably annular and can be integrally formed, welded or screwed to the inner wall of the upper joint 100. The plurality of support blocks 403 are arranged on the outer circumferential surface of the top end of the sliding sleeve 400 and can form a clamping jaw structure. When a force is applied to the sliding sleeve 400, the plurality of support blocks 403 are retracted inwardly to be separated from the support protrusion 101, so that the sliding sleeve 400 can move downwardly in the filter screen pipe 200, and the filter element 201 and the sealing element 401 are staggered to perform the filling operation. Correspondingly, when the sliding sleeve 400 is operated to move upwardly, the plurality of support blocks 403 are retracted inwardly in the support protrusion 101, and when the plurality of support blocks 403 pass through the top end of the support protrusion 101, the plurality of support blocks 403 are restored to deform and are hung on the support protrusion 101, so that the sliding sleeve 400 is hung and fixed in the working space. In this condition, the sealing element 401 blocks the corresponding filter element 201 to seal the filter element 201, and the formation fluid cannot enter the screen pipe 700 through the filter element 201.

[0047] In combination Figures 1-3 In some embodiments, the outer circumferential surface of the top of the support block 403 is provided with a first guide slope 4031. When the sliding sleeve 400 is operated to move upwardly, the support block 403 can retract along the first guide slope 4031 from the lower end of the support protrusion 101 to facilitate the upward sliding operation. The first guide slope 4031 can be arranged at 30-60°, and the specific arrangement can be determined according to the actual construction.

[0048] In combination Figures 1-3 In some embodiments, the bottom end of the support block 403 is perpendicular to the outer circumferential surface of the support block 403, so that the support block 403 can be prevented from being separated from the support protrusion 101 after the sliding sleeve 400 is in place, and the sliding sleeve 400 is changed from the fixed state to the sliding state.

[0049] In combination Figures 1-3 In some embodiments, the top end of the support protrusion 101 is perpendicular to the inner wall of the support protrusion 101 and cooperates with the bottom end of the support block 403 to prevent the support block 403 from being separated from the support protrusion 101 after the sliding sleeve 400 is in place, and the sliding sleeve 400 is changed from the fixed state to the sliding state. Figures 1-3 In combination, the inner wall of the bottom end of the support protrusion 101 is provided with a second guide slope 1011. When the sliding sleeve 400 is operated to move upwardly, the first guide slope 4031 on the support block 403 can retract along the second guide slope 1011 to facilitate the upward sliding operation. The second guide slope 1011 can also be arranged at 30-60°, and the specific arrangement can be determined according to the actual construction.

[0050] In combination Figures 1-3 In some embodiments, the upper joint 100 is provided with a limiting groove 102, the lower sidewall of the limiting groove 102 is the top end of the supporting protrusion 101, the upper sidewall of the limiting groove 102 is perpendicular to the central axis of the upper joint 100, and the depth of the limiting groove 102 is preferably greater than the length of the supporting block 403. The setting can provide an operating space when the sliding sleeve 400 moves upward, and can also set the limit position of the sliding sleeve 400 when moving upward, so that the sliding sleeve 400 is stably hung on the supporting protrusion 101.

[0051] In the related art, the effect of the external pipe isolation mainly depends on the compactness of the gravel packing. When the screen pipe 700 is long, the external gravel packing is not full and is relatively loose, at this time, the isolation effect cannot meet the production requirement, which affects the effect of separate layer oil production. In combination Figure 1 And Figure 2 Therefore, the sliding sleeve screen pipe sand prevention device shown in the embodiments of the present application further comprises a sleeve 500, which is sleeved on the outer circumferential surface of the filter screen pipe 200 and is arranged between the upper joint 100 and the lower joint 300. The sleeve 500 can expand under the condition of contacting liquid. The sleeve 500 is provided with a plurality of communication parts 501, and the communication part 501 and the filter 201 correspond to each other. In specific implementation, the sleeve 500 can be made of rubber material which expands when meeting liquid (oil or water). The outer diameter of the sleeve 500 is less than or equal to the outer diameter of the upper joint 100. The inner diameter of the sleeve 500 is equal to the outer diameter of the filter screen pipe 200. A certain number of holes are arranged on the circumferential surface of the sleeve 500 to serve as the communication part 501 of the sleeve 500. During production operation, the formation liquid carrying sand enters the inside of the pipe string through the communication part 501 on the sleeve 500, the filter 201 on the filter screen pipe 200 and the liquid passage 404 on the sliding sleeve 400. In addition, the sleeve 500 expands and deforms by absorbing water or oil, continues to press the gravel outside the filter screen pipe 200, continues to improve the compactness of the gravel, and reduces the radial thickness of the external gravel packing layer, which greatly reduces the permeability of the gravel packing layer in the interlayer section. After the production operation is completed, the filter screen pipe 200 which forms a blind pipe cooperates with the packed gravel to form an "interlayer packer 600". Due to the improvement of the external pipe string gravel packing rate and the packing effect, the sand prevention effect of the oil well is also improved. Due to the increase of the compactness of the gravel after packing and the decrease of the radial thickness of the packing layer, the isolation pressure of the "interlayer packer 600" is greatly improved when the liquid flow passes through the external gravel packing layer in the axial direction, which improves the effect of separate layer oil production of the oil well.

[0052] In the second aspect of the present application, the present application also provides a pipe string. Figure 4 To have Figure 1 and Figure 2 the structural schematic diagram of the pipe string of the sliding sleeve screen pipe sand prevention device shown in Figure 5For Figure 4 the structure diagram of the pipe column in the production state, combined Figure 4 and Figure 5 , the pipe column includes a packer 600, a screen pipe 700, and a tubing 800, the top end of the screen pipe 700 is connected with the packer 600, the middle part of the screen pipe 700 is provided with the sliding sleeve screen pipe sand prevention device; the tubing 800 is arranged in the screen pipe 700 and is connected with the sliding sleeve 400 to drive the sliding sleeve 400 to move in the operation space. The assembly relationship of the packer 600, the screen pipe 700, and the tubing is the prior art, which is not described here.

[0053] The pipe column provided in the application has the same function as the ordinary screen pipe 700 under the condition that the sealing element 401 does not block the corresponding filter element 201, has certain flow performance and sand blocking performance, and is convenient for gravel packing operation; after the gravel packing operation is completed, the sliding sleeve 400 is moved, the sealing element 401 on the outer periphery of the sliding sleeve 400 blocks the corresponding filter element 201, the formation liquid cannot enter the inside of the filter screen pipe 200 after flowing through the filter element 201, the sand-carrying liquid and the formation liquid can be prevented from entering the inside of the screen pipe 700 from the sliding sleeve 400 screen pipe 700, the function of filling and closing the sliding sleeve 400 can be met at one time, the operation is simple, no operation process is increased, the operation time is short, the cost is low, and good practicability is achieved.

[0054] In the application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, can also be detachable connection, or can be integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0055] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0056] In addition, the terms "first", "second", and the like in the description do not necessarily imply that the corresponding described features are important, substantial, or subordinate to one another. Rather, these terms are merely used to distinguish one feature from another. Furthermore, the terms "comprise", "include", "contain" or "have" and the like herein are used in their open-ended sense, and do not exclude the presence of other features. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0057] In the description of the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. "Under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0058] In the description of the present application, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, a person skilled in the art can combine and integrate different embodiments or examples described in the present specification.

[0059] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0060] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A sliding sleeve screen sand control device, characterized in that, The device comprises: an upper joint, a filter screen pipe and a lower joint are sequentially connected in vertical direction to form a working space, a plurality of filter members are arranged on the circumferential surface of the filter screen pipe at intervals; a sliding sleeve is movably arranged in the working space, a plurality of sealing members are arranged on the circumferential surface of the sliding sleeve, the sealing members and the filter members are arranged correspondingly, and the sealing members can block the corresponding filter members; a supporting protrusion is arranged on the inner wall of the upper joint; a plurality of supporting blocks are arranged on the circumferential surface of the top end of the sliding sleeve at intervals and can be hung on the supporting protrusion; the upper joint is provided with a limiting groove, the lower side wall of the limiting groove is the top end of the supporting protrusion, and the upper side wall of the limiting groove is perpendicular to the central axis of the upper joint; a sleeve is arranged on the circumferential surface of the filter screen pipe and between the upper joint and the lower joint, the sleeve expands under the condition of contacting liquid, the sleeve is provided with a plurality of communication parts, and the communication parts and the filter members are correspondingly communicated; the sleeve expands and deforms by absorbing water or oil, presses the gravel outside the filter screen pipe, and improves the compactness of the gravel.

2. The sliding sleeve screen sand control device of claim 1, wherein, a plurality of sealing grooves corresponding to the sealing members are arranged on the circumferential surface of the sliding sleeve, the sealing members are arranged in the corresponding sealing grooves, and the sealing members have sealing parts protruding from the surface of the sealing grooves.

3. The sliding sleeve screen sand control device of claim 1, wherein, a first guide inclined surface is arranged on the circumferential surface of the top of the supporting block, and the bottom end of the supporting block is perpendicular to the circumferential surface of the supporting block.

4. The sliding sleeve screen sand control device of claim 3, wherein, the top end of the supporting protrusion is perpendicular to the inner wall of the supporting protrusion, and a second guide inclined surface is arranged on the inner wall of the bottom end of the supporting protrusion.

5. The sliding sleeve screen sand control device of any one of claims 1-4, wherein, the top of the upper joint and the filter screen pipe are connected by threads.

6. The sliding sleeve screen sand control device of any one of claims 1-4, wherein, the bottom of the lower joint and the filter screen pipe are connected by threads.

7. A tubular string characterized by The pipe string comprises: a packer; a screen pipe, the top end of the screen pipe is connected with the packer, and the middle part of the screen pipe is provided with the sliding sleeve screen pipe sand prevention device according to any one of claims 1-6; a tubing is arranged in the screen pipe and connected with the sliding sleeve to drive the sliding sleeve to move in the working space.

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