Casing pipe well cementation device for drilling of horizontal well and well cementation method of casing pipe well cementation device

Abstract

The invention relates to the technical field of casing pipe well cementation, in particular to a casing pipe well cementation device for horizontal well drilling and a well cementation method.The casing pipe well cementation device comprises a casing pipe and a clamping groove formed in the outer wall of the circumference of the casing pipe, and a sealing disc slidably connected with the clamping groove is slidably installed in the casing pipe; the positioning and supporting mechanism is arranged on the sleeve and connected with the sealing disc, and the sleeve is further provided with an elastic assembly connected with the positioning and supporting mechanism; the conduction regulation and control mechanism is arranged on the sealing disc and connected with the sleeve, the sealing disc is further provided with a follow-up rotating mechanism connected with the conduction regulation and control mechanism, and the conduction regulation and control mechanism can act when the sealing disc moves. According to the casing pipe sealing device, when the air pressure in a casing pipe is changed, the casing pipe can be positioned and fixed through the positioning and supporting mechanism, and it is guaranteed that the follow-up casing pipe can be smoothly installed.

Description

Technical Field

[0001] The present invention relates to the technical field of casing cementing, in particular to a casing cementing device for drilling a horizontal well and a cementing method thereof. Background Art

[0002] Surface horizontal directional drilling technology has become a key approach to improving the overall benefits of coalbed methane development and utilization in coalfields. For soft, loose, and permeable coal reservoirs, horizontal cross-hole drilling is typically employed, with horizontal wells producing gas and vertical wells extracting gas to achieve pre-drainage of gas from these soft, loose coal seams.

[0003] Due to the long length of the horizontal well section, it is difficult to achieve the ideal fracturing effect by simply fracturing the coalbed methane horizontal well. Therefore, coalbed methane extraction usually requires staged fracturing to generate or connect more reservoir fractures to increase coalbed methane production.

[0004] The cementing quality of horizontal coalbed methane wells plays a crucial role in their production, lifespan, and resource conservation. Therefore, cementing quality must be measured after completion. Cementing typically involves inserting a casing into the borehole and injecting cement slurry into the casing to achieve the desired cementing effect. However, existing cementing casings are simply inserted into the borehole, failing to ensure that the casing is centered, which can lead to poor subsequent grouting and curing. Summary of the Invention

[0005] The object of the present invention is to provide a casing cementing device and a cementing method for horizontal well drilling, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A casing cementing device for drilling a horizontal well, comprising: A sleeve, and a slot provided on the outer circumferential wall of the sleeve, wherein a sealing disk slidably mounted in the sleeve and slidably connected to the slot; Also includes: A positioning support mechanism is provided on the sleeve and connected to the sealing disk. The sleeve is also provided with an elastic component connected to the positioning support mechanism. The sealing disk can drive the positioning support mechanism and the elastic component to move when the pressure in the sleeve changes; A conduction control mechanism is provided on the sealing disk and connected to the sleeve. The sealing disk is also provided with a follower rotating mechanism connected to the conduction control mechanism. The conduction control mechanism can operate when the sealing disk moves, and the conduction state between the sealing disk and the conduction control mechanism is adjusted by the follower rotating mechanism.

[0007] As a further solution of the present invention: the positioning support mechanism includes a first hinged rod and a second hinged rod hinged on the sleeve, and there are multiple first hinged rods and second hinged rods distributed equidistantly around the circumference. The ends of the first hinged rod and the second hinged rod are hinged with support plates, and the sealing disk is provided with a driven component connected to the support plate.

[0008] As a further solution of the present invention: the driven component includes a hollow tube installed on the sealing disk, a limiting sleeve is provided at the end of the hollow tube facing away from the sealing disk, the limiting sleeve is slidingly and sealingly connected to the sleeve, a supporting sleeve is hinged on the support plate, a support rod is slidingly installed in the supporting sleeve, and the support rod is hinged to the limiting sleeve.

[0009] As a further solution of the present invention: the elastic component includes a first fixing ring installed on the limiting sleeve, a second fixing ring is provided on the sleeve, a first spring is sleeved on the sleeve and the limiting sleeve, and the two ends of the first spring are respectively in contact with the first fixing ring and the second fixing ring.

[0010] As a further solution of the present invention: the conduction and regulation mechanism includes a storage box rotatably mounted on the sealing disk and connected to the card slot, a second conduction hole is provided at the bottom of the storage box, a first conduction hole is provided on the sealing disk and is conductively matched with the second conduction hole, the first conduction hole is connected to the hollow tube, and a guide assembly connected to the sleeve is provided on the storage box.

[0011] As a further solution of the present invention: the guide assembly includes a vertical groove and an annular groove opened on the outer wall of the sleeve, the end of the vertical groove is connected to the end of the annular groove, the end of the storage box is provided with a rotating sleeve, the rotating sleeve is slidingly and sealingly connected to the sleeve, and the inner wall of the rotating sleeve is provided with a second limit block that is slidably engaged with the vertical groove and the annular groove.

[0012] As a further solution of the present invention: the follow-up rotating mechanism includes a spiral groove opened on the outer wall of the circumference of the rotating sleeve, a movable sleeve is slidably installed on the rotating sleeve, the inner wall of the movable sleeve is provided with a first limit block slidingly engaged with the spiral groove, and the sealing disk is provided with a guide assembly connected to the movable sleeve.

[0013] As a further solution of the present invention: the guide assembly includes guide columns installed on the sealing disk and symmetrically arranged, a movable plate fixedly connected to the movable sleeve is slidably installed on the guide column, and a second spring is sleeved on the guide column to abut against the movable plate.

[0014] A casing cementing device and cementing method for drilling a horizontal well, comprising the following steps: Step 1: Insert the casing into the borehole and introduce gas into the casing; Step 2: Under the action of air pressure, the sealing disk is pushed to move along the length direction of the slot, thereby driving the positioning support mechanism and the elastic component to move; Step 3: When the positioning support mechanism moves to abut against the inner wall of the hole, the control sleeve is located at the center of the hole; Step 4: The sealing disk continues to move and drives the conduction control mechanism to move. When the sealing disk moves to the desired position, the conduction state of the conduction control mechanism and the positioning support mechanism is adjusted under the action of the follow-up rotation mechanism.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present application can pre-position and fix the casing before casing cementing to facilitate the subsequent addition of cement slurry. Specifically, when the casing is inserted into the hole, gas can be introduced into the casing, and under the action of air pressure, the sealing disk is pushed to move, thereby driving the positioning support mechanism and the elastic component to move. When the positioning support mechanism moves to fit the inner wall of the hole, the positioning support mechanism ensures that the casing is in the center of the hole and preliminarily fixes the casing. If the size of the hole is different, since the opening size of the support plate can be freely adjusted, the support plate can be adapted to different holes to ensure that the casing is always in the center of the hole.

[0016] At the same time, when the sealing disk moves, it will also drive the conduction control mechanism and the follow-up rotation mechanism to move. When the support plate fits against the inner wall of the hole, the sealing disk continues to move. After the sealing disk moves to the required position, under the action of the follow-up rotation mechanism, the conduction control mechanism is controlled to connect with the positioning support mechanism and the casing, so that the casing is automatically conductive after being positioned and fixed, so as to facilitate the subsequent injection of cement slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a structural schematic diagram of an embodiment of a casing cementing device for drilling a horizontal well.

[0018] Figure 2 This is a structural schematic diagram from another angle of an embodiment of a casing cementing device for drilling a horizontal well.

[0019] Figure 3 The present invention is a partially half-sectioned structural schematic diagram of an embodiment of a casing cementing device for drilling a horizontal well.

[0020] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0021] Figure 5 The figure is a schematic diagram of the connection relationship between the positioning support mechanism, the elastic component, and the partial conduction control mechanism in an embodiment of a casing cementing device for drilling a horizontal well.

[0022] Figure 6 The figure is a schematic diagram of the explosion structure of part of the positioning support mechanism in an embodiment of a casing cementing device for drilling a horizontal well.

[0023] Figure 7 The present invention is a schematic diagram showing the connection relationship between a partial conduction control mechanism and a partial follow-up rotation mechanism in an embodiment of a casing cementing device for drilling a horizontal well.

[0024] Figure 8 The figure is a schematic diagram of the explosion structure of part of the conduction control mechanism and part of the follow-up rotation mechanism in an embodiment of a casing cementing device for horizontal well drilling.

[0025] In the figure: 1. sleeve; 2. slot; 3. sealing disk; 4. first conducting hole; 5. hollow tube; 6. limiting sleeve; 7. support rod; 8. support sleeve; 9. first hinged rod; 10. second hinged rod; 11. support plate; 12. first fixing ring; 13. first spring; 14. second fixing ring; 15. storage box; 16. second conducting hole; 17. rotating sleeve; 18. spiral groove; 19. guide column; 20. second spring; 21. movable plate; 22. movable sleeve; 23. first limiting block; 24. vertical groove; 25. annular groove; 26. second limiting block. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0028] See also Figures 1 to 8 In an embodiment of the present invention, a casing cementing device for drilling a horizontal well includes: A sleeve 1, and a slot 2 provided on the outer circumferential wall of the sleeve 1, wherein a sealing disc 3 slidably mounted in the sleeve 1 and slidably connected to the slot 2; Also includes: See also Figure 1-Figure 3 、 Figure 5 、 Figure 6 , a positioning support mechanism is arranged on the sleeve 1 and connected to the sealing disk 3, the positioning support mechanism includes a first hinged rod 9 and a second hinged rod 10 hinged on the sleeve 1, and the first hinged rod 9 and the second hinged rod 10 are circumferentially equidistantly distributed in multiple, the first hinged rod 9 and the second hinged rod 10 are hinged at the ends with a support plate 11, and the sealing disk 3 is provided with a driven component connected to the support plate 11, wherein the driven component includes a hollow tube 5 installed on the sealing disk 3, and a limiting sleeve 6 is provided at one end of the hollow tube 5 facing away from the sealing disk 3, and the limiting sleeve 6 is slidingly and sealingly connected to the sleeve 1, and a supporting sleeve 8 is hinged on the support plate 11, and a support rod 7 is slidably installed in the support sleeve 8, and the support rod 7 is hinged to the limiting sleeve 6.

[0029] In detail, the sealing disk 3 divides the sleeve 1 into two spaces, so that the sleeve 1 is in a blocked state. In the initial state, under the action of the elastic component, the limiting sleeve 6 and the hollow tube 5 are located at the end of the stroke away from the support plate 11, so that the sealing disk 3 is located at the end of the stroke on one side of the slot 2. Under the action of the limiting sleeve 6, the support sleeve 8 and the support rod 7 are used to control the distance between the support plate 11 and the sleeve 1 to be minimum. At this time, the angle between the first hinge rod 9 and the second hinge rod 10 and the sleeve 1 is minimum. At this time, the sleeve 1 can be inserted into the drilled hole. When the insertion depth of the sleeve 1 reaches the required depth, gas can be introduced into the end of the sleeve 1 away from the support plate 11 to increase the air pressure in the sleeve 1. Under the action of the air pressure, the sealing disk 3 is pushed along the slot. 2 moves in the length direction and moves toward the support plate 11. The sealing disk 3 will also drive the hollow tube 5 to move, thereby driving the limiting sleeve 6 to move. Under the action of the limiting sleeve 6, the card slot 2 is blocked. The limiting sleeve 6 will also drive the support rod 7 and the support sleeve 8 to move, so that the support plate 11 moves in the direction away from the sleeve 1. The support plate 11 will also drive the first hinge rod 9 and the second hinge rod 10 to move. Since the first hinge rod 9 and the second hinge rod 10 are parallel and equally arranged, according to the parallelogram law, the angle of the support plate 11 will not change during movement. When the support plate 11 is in contact with the inner wall of the hole, under the action of the support plate 11, the sleeve 1 is located in the center of the hole, and under the action of the support plate 11, the sleeve 1 is fixed.

[0030] Preferably, when the support plate 11 is in contact with the inner wall of the hole, the support plate 11 no longer moves. At this time, the sealing disk 3 continues to move and controls the movement of the hollow tube 5 and the limiting sleeve 6. The limiting sleeve 6 also drives the support rod 7 to be inserted into the support sleeve 8, so that the support plate 11 no longer opens while continuously increasing the pressure with the inner wall of the hole to ensure that the sleeve 1 is more stable. If the size of the hole is different, since the opening size of the support plate 11 can be freely adjusted, the support plate 11 can be adapted to different holes to ensure that the sleeve 1 is always in the center of the hole.

[0031] See also Figure 1-Figure 3 、 Figure 5 The sleeve 1 is also provided with an elastic component connected to the positioning support mechanism. The sealing disk 3 can drive the positioning support mechanism and the elastic component to move when the pressure in the sleeve 1 changes. The elastic component includes a first fixing ring 12 installed on the limiting sleeve 6, and a second fixing ring 14 is provided on the sleeve 1. A first spring 13 is sleeved on the sleeve 1 and the limiting sleeve 6, and the two ends of the first spring 13 are respectively in contact with the first fixing ring 12 and the second fixing ring 14.

[0032] It should be noted that, in the initial state, the first spring 13 is in a compressed state. Under the action of the elastic force of the first spring 13, the limiting sleeve 6 is controlled by the first fixing ring 12 to be located at the end of the stroke away from the second fixing ring 14, so that the distance between the sealing disk 3 and the support plate 11 is maximized. When gas is introduced into the sleeve 1, under the action of air pressure, the sealing disk 3 is driven to move toward the support plate 11, thereby driving the first fixing ring 12 to move through the hollow tube 5 and the limiting sleeve 6. Under the action of the first fixing ring 12, the first spring 13 is compressed until the sealing disk 3 moves to the desired position. Under the action of the first spring 13, a thrust is provided to the sealing disk 3 to move in the direction away from the second fixing ring 14.

[0033] See also Figure 1-Figure 5 、 Figure 7 、 Figure 8, a conduction and regulation mechanism is arranged on the sealing disk 3 and connected to the sleeve 1, the conduction and regulation mechanism includes a storage box 15 rotatably mounted on the sealing disk 3 and connected with the card slot 2, a second conduction hole 16 is provided at the bottom of the storage box 15, a first conduction hole 4 is provided on the sealing disk 3 and is conductively matched with the second conduction hole 16, the first conduction hole 4 is connected with the hollow tube 5, the storage box 15 is provided with a guide assembly connected with the sleeve 1, wherein the guide assembly includes a vertical groove 24 and an annular groove 25 provided on the outer wall of the sleeve 1, the end of the vertical groove 24 is connected with the end of the annular groove 25, a rotating sleeve 17 is provided at the end of the storage box 15, the rotating sleeve 17 is slidingly and sealingly connected to the sleeve 1, and the inner wall of the rotating sleeve 17 is provided with a second limit block 26 slidably engaged with the vertical groove 24 and the annular groove 25.

[0034] Further, in the initial state, under the action of the first spring 13, the sealing disk 3 is located at the end of the stroke away from the second fixing ring 14, so that the storage box 15 and the rotating sleeve 17 are located at the end of the stroke away from the second fixing ring 14. Under the action of the rotating sleeve 17, the second limit block 26 is controlled to be located at the end of the stroke of the vertical groove 24 on the side away from the annular groove 25. Under the action of the second limit block 26 and the vertical groove 24, the rotating sleeve 17 and the storage box 15 will not rotate. Under the action of the follow-up rotating mechanism, the rotating sleeve 17 always has a tendency to rotate. Under the action of the storage box 15, the first conducting hole 4 and the second conducting hole 16 are in a staggered state, so that the second conducting hole 16 and the hollow tube 5 are in a blocked state.

[0035] When the sleeve 1 needs to be fixed, gas can be introduced into the sleeve 1. Under the action of gas pressure, the sealing disk 3 is pushed toward the second fixing ring 14, thereby driving the storage box 15 and the rotating sleeve 17 to move. The rotating sleeve 17 will drive the second limiting block 26 to move, so that the second limiting block 26 moves along the length direction of the vertical groove 24. At this time, the support plate 11 will move in the direction away from each other. When the support plate 11 moves to fit the inner wall of the hole, the support plate 11 no longer moves. At this time, the second limiting block 26 is still in the vertical groove 24, and the sealing disk 3 continues to move until the second limiting block 26 is in the vertical groove 24. Until the second limit block 26 moves to the connection position of the vertical groove 24 and the annular groove 25, at this time, the rotating sleeve 17 can rotate freely. Under the action of the follow-up rotating mechanism, the rotating sleeve 17 and the storage box 15 rotate a certain angle, so that the second conducting hole 16 moves to the connection position with the first conducting hole 4. At the same time, the second limit block 26 will move into the annular groove 25 to restrict the sealing disk 3 from moving. The first conducting hole 4, the second conducting hole 16, the card slot 2, the hollow tube 5, and the storage box 15 are in a mutually connected state, so that the casing 1 is conductive, thereby facilitating the subsequent conveying of cement slurry by the casing 1.

[0036] Preferably, since the first spring 13 is in a compressed state, the sealing disk 3 tends to move away from the second fixing ring 14, and the second limit block 26 is located in the annular groove 25. Therefore, the position of the sealing disk 3 is locked, ensuring that the sleeve 1 is fixed while controlling the conduction of the sleeve 1.

[0037] See also Figure 1-4 、 Figure 7 、 Figure 8 The sealing disk 3 is also provided with a follow-up rotating mechanism connected to the conduction regulating mechanism, and the conduction regulating mechanism can be operated when the sealing disk 3 moves, and the conduction state of the sealing disk 3 and the conduction regulating mechanism is adjusted by the follow-up rotating mechanism. The follow-up rotating mechanism includes a spiral groove 18 opened on the outer wall of the circumference of the rotating sleeve 17, and a movable sleeve 22 is slidably installed on the rotating sleeve 17. The inner wall of the movable sleeve 22 is provided with a first limit block 23 that slides in engagement with the spiral groove 18. The sealing disk 3 is provided with a guide assembly connected to the movable sleeve 22, wherein the guide assembly includes a guide column 19 installed on the sealing disk 3 and symmetrically arranged, and a movable plate 21 fixedly connected to the movable sleeve 22 is slidably installed on the guide column 19, and a second spring 20 that abuts against the movable plate 21 is sleeved on the guide column 19.

[0038] Furthermore, in the initial state, the second limit block 26 is located in the vertical groove 24, so that the rotating sleeve 17 will not rotate, and the first limit block 23 is located on the side of the spiral groove 18 facing the sealing disk 3, so that the distance between the movable plate 21 and the sealing disk 3 is minimized. At this time, the second spring 20 is in a compressed state. Under the action of the second spring 20, the movable plate 21 has a tendency to move in the direction away from the sealing disk 3, and under the action of the first limit block 23 and the spiral groove 18, the rotating sleeve 17 is controlled to have a tendency to rotate. When the sealing disk 3 moves toward the second fixing ring 14, the support plate 11 is driven to move in the direction away from each other. At the same time, the sealing disk 3 will also drive the storage box 15 and the rotating sleeve 17 to move, thereby driving the second limit block 26 to slide along the length direction of the vertical groove 24. When the plate 11 fits with the inner wall of the hole, the support plate 11 no longer moves. At this time, the second limit block 26 continues to move along the length direction of the vertical groove 24 until the second limit block 26 moves to the connection position of the vertical groove 24 and the annular groove 25. At this time, the second spring 20 is elastically released and drives the movable plate 21 to move in the direction away from the sealing disk 3 to drive the movable sleeve 22 to move. The movable sleeve 22 will also drive the first limit block 23 to slide along the spiral groove 18. Under the action of the first limit block 23 and the spiral groove 18, the rotating sleeve 17 is controlled to rotate, thereby driving the storage box 15 to rotate to control the second conducting hole 16 to move to the connection position with the first conducting hole 4. By applying a rotational force in advance, it can be ensured that after the support plate 11 positions and fixes the sleeve 1, the sleeve 1 is automatically controlled to be connected to ensure the subsequent addition of cement slurry.

[0039] A casing cementing device and cementing method for drilling a horizontal well, comprising the following steps: Step 1: Insert the casing 1 into the borehole and introduce gas into the casing 1; Step 2: Under the action of air pressure, the sealing disk 3 is pushed to move along the length direction of the slot 2, thereby driving the positioning support mechanism and the elastic component to move; Step 3: When the positioning support mechanism moves to abut against the inner wall of the hole, the control sleeve 1 is located at the center of the hole; Step 4: The sealing disk 3 continues to move and drives the conduction control mechanism to move. When the sealing disk 3 moves to the desired position, the conduction state of the conduction control mechanism and the positioning support mechanism is adjusted under the action of the follow-up rotation mechanism.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A casing cementing device for drilling a horizontal well, comprising: A sleeve (1), and a slot (2) provided on the outer circumferential wall of the sleeve (1), wherein a sealing disc (3) is slidably mounted in the sleeve (1) and is slidably connected to the slot (2); It is characterized by further comprising: A positioning support mechanism is provided on the sleeve (1) and is connected to the sealing disk (3); an elastic component connected to the positioning support mechanism is also provided on the sleeve (1); the sealing disk (3) is capable of driving the positioning support mechanism and the elastic component to move when the pressure in the sleeve (1) changes; A conduction regulating mechanism is provided on the sealing disk (3) and connected to the sleeve (1); the sealing disk (3) is further provided with a follower rotating mechanism connected to the conduction regulating mechanism; the conduction regulating mechanism is capable of operating when the sealing disk (3) moves, and the conduction state between the sealing disk (3) and the conduction regulating mechanism is adjusted by the follower rotating mechanism.

2. The casing cementing device for horizontal well drilling according to claim 1, characterized in that: The positioning support mechanism comprises a first hinged rod (9) and a second hinged rod (10) hinged on the sleeve (1), a plurality of the first hinged rods (9) and the second hinged rods (10) are equidistantly distributed around the circumference, a support plate (11) is hinged at the ends of the first hinged rod (9) and the second hinged rod (10), and a driven component connected to the support plate (11) is provided on the sealing disk (3).

3. The casing cementing device for horizontal well drilling according to claim 2, characterized in that: The driven assembly comprises a hollow tube (5) mounted on the sealing disk (3), a limiting sleeve (6) is provided at one end of the hollow tube (5) facing away from the sealing disk (3), the limiting sleeve (6) is slidingly and sealingly connected to the sleeve (1), a supporting sleeve (8) is hingedly connected to the supporting plate (11), a supporting rod (7) is slidably mounted in the supporting sleeve (8), and the supporting rod (7) is hingedly connected to the limiting sleeve (6).

4. The casing cementing device for horizontal well drilling according to claim 3, characterized in that: The elastic component comprises a first fixing ring (12) mounted on the limiting sleeve (6), a second fixing ring (14) is provided on the sleeve (1), a first spring (13) is sleeved on the sleeve (1) and the limiting sleeve (6), and two ends of the first spring (13) are respectively in contact with the first fixing ring (12) and the second fixing ring (14).

5. The casing cementing device for horizontal well drilling according to claim 3, characterized in that: The conduction regulating mechanism comprises a material storage box (15) rotatably mounted on the sealing disk (3) and connected to the card slot (2); a second conduction hole (16) is provided at the bottom of the material storage box (15); a first conduction hole (4) is provided on the sealing disk (3) and is in conduction with the second conduction hole (16); the first conduction hole (4) is in communication with the hollow tube (5); and a guide assembly connected to the sleeve (1) is provided on the material storage box (15).

6. The casing cementing device for horizontal well drilling according to claim 5, characterized in that: The guide assembly comprises a vertical groove (24) and an annular groove (25) provided on the outer wall of the sleeve (1), the end of the vertical groove (24) being connected to the end of the annular groove (25), a rotating sleeve (17) being provided at the end of the storage box (15), the rotating sleeve (17) being connected to the sleeve (1) in a sliding and sealing manner, and a second limiting block (26) being slidably engaged with the vertical groove (24) and the annular groove (25) being provided on the inner wall of the rotating sleeve (17).

7. The casing cementing device for horizontal well drilling according to claim 6, characterized in that: The follow-up rotating mechanism includes a spiral groove (18) provided on the circumferential outer wall of the rotating sleeve (17); a movable sleeve (22) is slidably mounted on the rotating sleeve (17); a first limiting block (23) is provided on the inner wall of the movable sleeve (22) and is slidably engaged with the spiral groove (18); and a guide assembly connected to the movable sleeve (22) is provided on the sealing disk (3).

8. The casing cementing device for horizontal well drilling according to claim 7, characterized in that: The guide assembly includes a guide column (19) mounted on the sealing disk (3) and symmetrically arranged, a movable plate (21) fixedly connected to the movable sleeve (22) being slidably mounted on the guide column (19), and a second spring (20) abutting against the movable plate (21) being sleeved on the guide column (19).

9. A casing cementing device for drilling a horizontal well and a cementing method thereof, using the casing cementing device for drilling a horizontal well according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: inserting the casing (1) into the borehole and introducing gas into the casing (1); Step 2: Under the action of air pressure, the sealing disc (3) is pushed to move along the length direction of the slot (2), thereby driving the positioning support mechanism and the elastic component to move; Step 3: When the positioning support mechanism moves to abut against the inner wall of the hole, the control sleeve (1) is located at the center of the hole; Step 4: The sealing disk (3) continues to move and drives the conduction control mechanism to move. When the sealing disk (3) moves to the desired position, the conduction state of the conduction control mechanism and the positioning support mechanism is adjusted under the action of the follow-up rotation mechanism.

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