A casing cementing device and cementing method for horizontal well drilling.

Abstract

This invention relates to the field of casing cementing technology, specifically to a casing cementing device and method for horizontal well drilling, comprising: a casing, and a groove formed on the outer circumference of the casing, wherein a sealing disc slidably connected to the groove is slidably installed inside the casing; a positioning support mechanism disposed on the casing and connected to the sealing disc, wherein an elastic component connected to the positioning support mechanism is also disposed on the casing; and a conduction control mechanism disposed on the sealing disc and connected to the casing, wherein a follower rotation mechanism connected to the conduction control mechanism is disposed on the sealing disc and connected to the conduction control mechanism, wherein the conduction control mechanism can operate when the sealing disc moves, and adjust the conduction state between the sealing disc and the conduction control mechanism through the follower rotation mechanism. This application enables the casing to be positioned and fixed by the positioning support mechanism when the gas pressure inside the casing changes, thereby ensuring smooth subsequent casing installation.

Description

Technical Field

[0001] This invention relates to the field of casing cementing technology, specifically a casing cementing device and cementing method for horizontal well drilling. Background Technology

[0002] Surface horizontal directional drilling technology has become an important way to improve the overall benefits of coalbed methane development and utilization in coalfields. For soft, loose, and permeable coal reservoirs, horizontal cross-hole drilling technology is usually adopted, and gas production is achieved by using horizontal wells and gas extraction from vertical wells to pre-extract gas from soft and loose coal seams.

[0003] Because horizontal well sections are relatively long, it is difficult to achieve the desired fracturing effect by performing general fracturing on horizontal coalbed methane wells. Therefore, coalbed methane extraction usually requires staged fracturing to generate or connect more reservoir fractures in order to increase coalbed methane production.

[0004] The cementing quality of horizontal coalbed methane wells plays a crucial role in well production, lifespan, and resource protection; therefore, cementing quality must be measured after completion. During cementing, the casing is typically inserted into the borehole, and cement slurry is injected into the casing to achieve the desired cementing effect. However, existing cementing casings, due to their simple insertion into the borehole, cannot ensure that the casing is centered, potentially leading to poor subsequent grouting and curing. Summary of the Invention

[0005] The purpose of this invention is to provide a casing cementing device and cementing method for horizontal well drilling, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A casing cementing device for horizontal well drilling includes:

[0008] A sleeve, and a groove formed on the outer circumference of the sleeve, wherein a sealing disc that is slidably connected to the groove is slidably installed inside the sleeve;

[0009] Also includes:

[0010] A positioning support mechanism is provided on the sleeve and connected to the sealing disc. The sleeve is also provided with an elastic component connected to the positioning support mechanism. The sealing disc can drive the positioning support mechanism and the elastic component to move when the pressure inside the sleeve changes.

[0011] A conduction control mechanism is disposed on the sealing disc and connected to the sleeve. The sealing disc is also provided with a follower rotation mechanism connected to the conduction control mechanism. The conduction control mechanism can operate when the sealing disc moves and adjust the conduction state between the sealing disc and the conduction control mechanism through the follower rotation mechanism.

[0012] As a further aspect of the present invention: the positioning support mechanism includes a first hinge rod and a second hinge rod hinged to the sleeve, and multiple first hinge rods and second hinge rods are distributed equidistantly in a circle. The ends of the first hinge rods and second hinge rods are hinged to support plates, and the sealing disc is provided with a driven component connected to the support plate.

[0013] As a further embodiment of the present invention: the driven component includes a hollow tube mounted on the sealing disc, a limiting sleeve is provided at one end of the hollow tube away from the sealing disc, the limiting sleeve is slidably and sealingly connected to the sleeve, a support sleeve is hinged on the support plate, a support rod is slidably installed inside the support sleeve, and the support rod is hinged to the limiting sleeve.

[0014] As a further embodiment of the present invention: the elastic component includes a first fixing ring mounted on the limiting sleeve, a second fixing ring provided on the sleeve, and a first spring sleeved on the sleeve and the limiting sleeve, with the two ends of the first spring abutting against the first fixing ring and the second fixing ring respectively.

[0015] As a further embodiment of the present invention: the conduction control mechanism includes a storage box rotatably mounted on the sealing plate and connected to the slot, the bottom of the storage box is provided with a second conduction hole, the sealing plate is provided with a first conduction hole that conducts and cooperates with the second conduction hole, the first conduction hole is connected to the hollow tube, and the storage box is provided with a guide component connected to the sleeve.

[0016] As a further embodiment of the present invention: the guiding component includes a vertical groove and an annular groove formed 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 slidably and sealingly connected to the sleeve, and the inner wall of the rotating sleeve is provided with a second limiting block that slidably engages with the vertical groove and the annular groove.

[0017] As a further embodiment of the present invention: the follower rotation mechanism includes a spiral groove formed on the outer circumference of the rotating sleeve, a movable sleeve is slidably mounted on the rotating sleeve, a first limiting block is provided on the inner wall of the movable sleeve to slide and engage with the spiral groove, and a guide component connected to the movable sleeve is provided on the sealing disc.

[0018] As a further embodiment of the present invention: the guide assembly includes guide posts mounted on the sealing disc and arranged symmetrically, a movable plate fixedly connected to the movable sleeve is slidably mounted on the guide post, and a second spring is sleeved on the guide post and abuts against the movable plate.

[0019] A casing cementing device and cementing method for horizontal well drilling include the following steps:

[0020] Step 1: Insert the casing into the borehole and introduce gas into the casing;

[0021] Step 2: Under the action of air pressure, the sealing disc is pushed to move along the length of the slot, thereby driving the positioning support mechanism and the elastic component to move;

[0022] Step 3: When the positioning support mechanism moves to abut against the inner wall of the hole, the control sleeve is in the center position of the hole;

[0023] Step 4: The sealing disc continues to move, driving the conduction control mechanism to move. When the sealing disc moves to the required position, the conduction state between the conduction control mechanism and the positioning support mechanism is adjusted under the action of the follow-up rotation mechanism.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] This application enables the casing to be pre-positioned and fixed before cementing, facilitating the subsequent addition of cement slurry. Specifically, when the casing is inserted into the borehole, gas can be introduced into the casing, and under the action of gas pressure, the sealing disc moves, thereby driving the positioning support mechanism and elastic components to move. When the positioning support mechanism moves to fit against the inner wall of the borehole, it ensures that the casing is in the center of the borehole and initially fixes the casing. If the borehole size is different, since the opening size of the support plate can be freely adjusted, different boreholes can be adapted by the support plate to ensure that the casing is always in the center of the borehole.

[0026] Meanwhile, as the sealing disc moves, it also drives the conduction control mechanism and the follow-up rotation mechanism to move. When the support plate is in contact with the inner wall of the hole, the sealing disc continues to move. After the sealing disc 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 sleeve, so that the sleeve is automatically connected after being positioned and fixed, so as to facilitate the subsequent injection of cement slurry. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of a casing cementing device for horizontal well drilling.

[0028] Figure 2This is a structural schematic diagram of another angle in an embodiment of a casing cementing device for horizontal well drilling.

[0029] Figure 3 This is a partial half-section diagram of an embodiment of a casing cementing device for horizontal well drilling.

[0030] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0031] Figure 5 This is a schematic diagram showing 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 horizontal well drilling.

[0032] Figure 6 This is an exploded structural diagram of a portion of the positioning support mechanism in an embodiment of a casing cementing device for horizontal well drilling.

[0033] Figure 7 This is a schematic diagram showing the connection relationship between 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.

[0034] Figure 8 This is an exploded structural diagram 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.

[0035] In the diagram: 1. Sleeve; 2. Slot; 3. Sealing disc; 4. First through hole; 5. Hollow tube; 6. Limiting sleeve; 7. Support rod; 8. Support sleeve; 9. First hinge rod; 10. Second hinge rod; 11. Support plate; 12. First fixing ring; 13. First spring; 14. Second fixing ring; 15. Storage box; 16. Second through hole; 17. Rotating sleeve; 18. Spiral groove; 19. Guide post; 20. Second spring; 21. Movable plate; 22. Movable sleeve; 23. First limiting block; 24. Vertical groove; 25. Annular groove; 26. Second limiting block. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0038] Please see Figures 1-8 In this embodiment of the invention, a casing cementing device for horizontal well drilling includes:

[0039] A sleeve 1 and a groove 2 formed on the outer circumference of the sleeve 1, wherein a sealing disc 3 is slidably installed inside the sleeve 1 and slidably connected to the groove 2;

[0040] Also includes:

[0041] Please see Figures 1-3 , Figure 5 , Figure 6 A positioning support mechanism is provided on the sleeve 1 and connected to the sealing disc 3. The positioning support mechanism includes a first hinge rod 9 and a second hinge rod 10 hinged to the sleeve 1. Multiple first hinge rods 9 and second hinge rods 10 are equidistantly distributed in a circle. Support plates 11 are hinged to the ends of the first hinge rods 9 and second hinge rods 10. A driven component connected to the support plate 11 is provided on the sealing disc 3. The driven component includes a hollow tube 5 installed on the sealing disc 3. A limiting sleeve 6 is provided at one end of the hollow tube 5 away from the sealing disc 3. The limiting sleeve 6 is slidably and sealingly connected to the sleeve 1. A support sleeve 8 is hinged on the support plate 11. A support rod 7 is slidably installed in the support sleeve 8 and is hinged to the limiting sleeve 6.

[0042] In detail, the sealing disc 3 divides the sleeve 1 into two spaces, thus sealing the sleeve 1. Initially, under the action of the elastic component, the limiting sleeve 6 and the hollow tube 5 are positioned at the end of their stroke away from the support plate 11, so that the sealing disc 3 is positioned at the end of its stroke on one side of the slot 2. Under the action of the limiting sleeve 6, the distance between the support plate 11 and the sleeve 1 is minimized by the support sleeve 8 and the support rod 7. At this time, the angle between the first hinge rod 9 and the second hinge rod 10 and the sleeve 1 is minimized. 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, so that the air pressure inside the sleeve 1 increases. Under the action of the air pressure, the sealing disc 3 is pushed along the slot. The length direction of the 2 moves towards the support plate 11. The sealing plate 3 also drives the hollow tube 5 to move, thereby driving the limiting sleeve 6 to move. Under the action of the limiting sleeve 6, the slot 2 is blocked. The limiting sleeve 6 also drives the support rod 7 and the support sleeve 8 to move, so that the support plate 11 moves away from the sleeve 1. The support plate 11 also drives 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 when it moves. When the support plate 11 is in contact with the inner wall of the hole, the sleeve 1 is located at the center of the hole under the action of the support plate 11, and the sleeve 1 is fixed under the action of the support plate 11.

[0043] Preferably, after the support plate 11 is in contact with the inner wall of the hole, the support plate 11 stops moving. At this time, the sealing disc 3 continues to move and controls the movement of the hollow tube 5 and the limiting sleeve 6. The limiting sleeve 6 will also drive the support rod 7 to insert into the support sleeve 8, so that while the support plate 11 stops opening, it continues to increase the pressure with the inner wall of the hole, ensuring 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 position of the hole.

[0044] Please see Figures 1-3 , Figure 5 The sleeve 1 is also provided with an elastic component connected to the positioning support mechanism. The sealing disc 3 can drive the positioning support mechanism and the elastic component to move when the pressure inside the sleeve 1 changes. The elastic component includes a first fixing ring 12 installed on the limiting sleeve 6, a second fixing ring 14 provided on the sleeve 1, and a first spring 13 sleeved on the sleeve 1 and the limiting sleeve 6. The two ends of the first spring 13 abut against the first fixing ring 12 and the second fixing ring 14, respectively.

[0045] 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 first fixed ring 12 controls the limiting sleeve 6 to be located at the end of its stroke away from the second fixed ring 14, so as to maximize the distance between the sealing disc 3 and the support plate 11. When gas is introduced into the sleeve 1, under the action of air pressure, the sealing disc 3 is driven to move towards the support plate 11, thereby driving the first fixed ring 12 to move through the hollow tube 5 and the limiting sleeve 6. Under the action of the first fixed ring 12, the first spring 13 is compressed until the sealing disc 3 moves to the required position. Then, under the action of the first spring 13, the sealing disc 3 is provided with a thrust to move away from the second fixed ring 14.

[0046] Please see Figures 1-5 , Figure 7 , Figure 8 A flow control mechanism is provided on the sealing disc 3 and connected to the sleeve 1. The flow control mechanism includes a storage box 15 rotatably mounted on the sealing disc 3 and connected to the slot 2. The bottom of the storage box 15 is provided with a second flow hole 16. The sealing disc 3 is provided with a first flow hole 4 that is connected to the second flow hole 16. The first flow hole 4 is connected to the hollow tube 5. The storage box 15 is provided with a guide assembly connected to the sleeve 1. The guide assembly includes a vertical groove 24 and an annular groove 25 formed on the outer wall of the sleeve 1. The end of the vertical groove 24 is connected to the end of the annular groove 25. The end of the storage box 15 is provided with a rotating sleeve 17. The rotating sleeve 17 is slidably and sealingly connected to the sleeve 1. The inner wall of the rotating sleeve 17 is provided with a second limiting block 26 that slidably engages with the vertical groove 24 and the annular groove 25.

[0047] Furthermore, in the initial state, under the action of the first spring 13, the sealing disc 3 is located at the end of its stroke away from the second fixed ring 14, so that the storage box 15 and the rotating sleeve 17 are located at the end of their stroke away from the second fixed ring 14. Under the action of the rotating sleeve 17, the second limiting block 26 is controlled to be located at the end of its stroke on the side of the vertical groove 24 away from the annular groove 25. Under the action of the second limiting 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 through hole 4 and the second through hole 16 are in a misaligned state, so that the second through hole 16 and the hollow tube 5 are in a blocked state.

[0048] When it is necessary to fix the sleeve 1, gas can be introduced into the sleeve 1. Under the action of air pressure, the sealing disc 3 is pushed towards 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 of the vertical groove 24. At this time, the support plate 11 will move in a direction away from each other. When the support plate 11 moves to fit against the inner wall of the hole, the support plate 11 stops moving. At this time, the second limiting block 26 is still in the vertical groove 24, and the sealing disc 3 continues to move. When the second limiting block 26 moves to the position where the vertical groove 24 and the annular groove 25 are connected, 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 at a certain angle so that the second through hole 16 moves to the position where it is connected to the first through hole 4. At the same time, the second limiting block 26 will move into the annular groove 25 to restrict the sealing disc 3 from moving. The first through hole 4, the second through hole 16, the slot 2, the hollow tube 5, and the storage box 15 are in a state of mutual connection so that the sleeve 1 is connected, thereby facilitating the subsequent conveying of cement slurry by the sleeve 1.

[0049] Preferably, since the first spring 13 is in a compressed state, the sealing disc 3 tends to move away from the second fixing ring 14, and the second limiting block 26 is located in the annular groove 25. Therefore, the position of the sealing disc 3 is locked, ensuring that the sleeve 1 is fixed while controlling the sleeve 1 to conduct.

[0050] Please see Figure 1-4 , Figure 7 , Figure 8 The sealing disk 3 is also provided with a follow-up rotation mechanism connected to the conduction control mechanism. The conduction control mechanism can operate when the sealing disk 3 moves, and adjust the conduction state between the sealing disk 3 and the conduction control mechanism through the follow-up rotation mechanism. The follow-up rotation mechanism includes a spiral groove 18 formed on the outer circumference of the rotating sleeve 17. A movable sleeve 22 is slidably installed on the rotating sleeve 17. A first limiting block 23 is provided on the inner wall of the movable sleeve 22 and slidably fitted with the spiral groove 18. The sealing disk 3 is provided with a guide assembly connected to the movable sleeve 22. The guide assembly includes guide posts 19 installed on the sealing disk 3 and arranged symmetrically. A movable plate 21 fixedly connected to the movable sleeve 22 is slidably installed on the guide post 19. A second spring 20 is sleeved on the guide post 19 and abuts against the movable plate 21.

[0051] Furthermore, in the initial state, the second limiting block 26 is located within the vertical groove 24, preventing the rotating sleeve 17 from rotating. The first limiting block 23 is located on the side of the spiral groove 18 facing the sealing disc 3, minimizing the distance between the movable plate 21 and the sealing disc 3. At this time, the second spring 20 is compressed, causing the movable plate 21 to tend to move away from the sealing disc 3. Under the action of the first limiting block 23 and the spiral groove 18, the rotating sleeve 17 is controlled to rotate. When the sealing disc 3 moves towards the second fixed ring 14, it drives the support plate 11 to move away from each other. Simultaneously, the sealing disc 3 also drives the storage box 15 and the rotating sleeve 17 to move, thereby causing the second limiting block 26 to slide along the length of the vertical groove 24. When plate 11 is in contact with the inner wall of the hole, support plate 11 stops moving. At this time, second limiting block 26 continues to move along the length of vertical groove 24 until the second limiting block 26 moves to the position where vertical groove 24 and annular groove 25 are connected. At this time, second spring 20 is released elastically and drives movable plate 21 to move away from sealing disc 3, so as to drive movable sleeve 22 to move. Movable sleeve 22 will also drive first limiting block 23 to slide along spiral groove 18. Under the action of first limiting block 23 and spiral groove 18, control rotating sleeve 17 to rotate, thereby driving storage box 15 to rotate, so as to control second guide hole 16 to move to the position where it is connected to first guide hole 4. By applying rotational force in advance, it can be ensured that after support plate 11 positions and fixes sleeve 1, sleeve 1 is automatically controlled to be connected, so as to ensure the subsequent addition of cement slurry.

[0052] A casing cementing device and cementing method for horizontal well drilling include the following steps:

[0053] Step 1: Insert casing 1 into the borehole and introduce gas into casing 1;

[0054] Step 2: Under the action of air pressure, the sealing disc 3 is pushed to move along the length of the slot 2, thereby driving the positioning support mechanism and the elastic component to move;

[0055] Step 3: When the positioning support mechanism moves to abut against the inner wall of the hole, the control sleeve 1 is in the center position of the hole;

[0056] Step 4: The sealing disc 3 continues to move, driving the conduction control mechanism to move. When the sealing disc 3 moves to the required position, the conduction state between the conduction control mechanism and the positioning support mechanism is adjusted under the action of the follow-up rotation mechanism.

[0057] 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A casing cementing device for horizontal well drilling, comprising: A sleeve (1) and a groove (2) formed on the outer circumference of the sleeve (1), wherein a sealing disc (3) is slidably installed inside the sleeve (1) and slidably connected to the groove (2); Its characteristic is that it further includes: A positioning support mechanism is provided on the sleeve (1) and connected to the sealing disc (3). The sleeve (1) is also provided with an elastic component connected to the positioning support mechanism. The sealing disc (3) can drive the positioning support mechanism and the elastic component to move when the pressure inside the sleeve (1) changes. A conduction control mechanism is provided on the sealing disc (3) and connected to the sleeve (1). The sealing disc (3) is also provided with a follow-up rotation mechanism connected to the conduction control mechanism. The conduction control mechanism can operate when the sealing disc (3) moves and adjust the conduction state between the sealing disc (3) and the conduction control mechanism through the follow-up rotation mechanism. The positioning support mechanism includes a first hinge rod (9) and a second hinge rod (10) hinged to the sleeve (1). The first hinge rod (9) and the second hinge rod (10) are distributed in multiple circumferentially. The ends of the first hinge rod (9) and the second hinge rod (10) are hinged to a support plate (11). The sealing disc (3) is provided with a driven component connected to the support plate (11). The driven component includes a hollow tube (5) mounted on the sealing disc (3), a limiting sleeve (6) is provided at one end of the hollow tube (5) away from the sealing disc (3), the limiting sleeve (6) is slidably sealed to the sleeve (1), a support sleeve (8) is hinged on the support plate (11), a support rod (7) is slidably installed inside the support sleeve (8), and the support rod (7) is hinged to the limiting sleeve (6); The elastic component includes a first fixing ring (12) installed on the limiting sleeve (6), a second fixing ring (14) provided on the sleeve (1), and a first spring (13) sleeved on the sleeve (1) and the limiting sleeve (6), with the two ends of the first spring (13) abutting against the first fixing ring (12) and the second fixing ring (14) respectively. The conduction control mechanism includes a storage box (15) rotatably mounted on the sealing disc (3) and connected to the slot (2). The storage box (15) has a second conduction hole (16) at its bottom. The sealing disc (3) has a first conduction hole (4) that conducts and cooperates with the second conduction hole (16). The first conduction hole (4) is connected to the hollow tube (5). The storage box (15) is provided with a guide component that is connected to the sleeve (1). The guiding component includes a vertical groove (24) and an annular groove (25) formed on the outer wall of the sleeve (1). The end of the vertical groove (24) is connected to 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 slidably and sealingly connected to the sleeve (1). A second limiting block (26) is provided on the inner wall of the rotating sleeve (17) and slidably engages with the vertical groove (24) and the annular groove (25). The follow-up rotation mechanism includes a spiral groove (18) formed on the outer circumference 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 slides into the spiral groove (18), and a guide component connected to the movable sleeve (22) is provided on the sealing disc (3).

2. A horizontal well drilling casing setting device according to claim 1, characterized in that, The guide assembly includes guide posts (19) mounted on the sealing disc (3) and arranged symmetrically. A movable plate (21) fixedly connected to the movable sleeve (22) is slidably mounted on the guide post (19). A second spring (20) is sleeved on the guide post (19) and abuts against the movable plate (21).

3. A method for cementing a horizontal well, using the casing cementing device for a horizontal well drilling as claimed in any one of claims 1-2, characterized in that, Includes 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 disc (3) is pushed to move along the length 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 in the center position of the hole; Step 4: The sealing disc (3) continues to move and drives the conduction control mechanism to move. When the sealing disc (3) moves to the required 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.

Images