An automatic cement umbrella for cementing that opens through the drill pipe

Abstract

This invention relates to an automatic openable cement umbrella for cementing, belonging to the field of cement plug operation technology. It includes an umbrella tube, with an umbrella rod movably connected to the inner side of the tube. The outer surface of the umbrella rod is provided with an unfolding component to ensure the cement umbrella opens automatically. At the top of the umbrella rod, inside the umbrella tube, is an unlocking component to improve positioning accuracy and ensure the cement umbrella opens smoothly at the target position. At the top of the unlocking component, outside the umbrella tube, is a stabilizing component to facilitate the transport and carrying of the cement umbrella. The umbrella rod extends through the umbrella tube, and its outer surface is provided with an umbrella cup to reduce friction between the umbrella rod and the well wall. An umbrella head is fixed at the bottom of the umbrella rod. When not in use, this automatic openable cement umbrella for cementing, through the cooperation of the umbrella cup and stabilizing component, effectively restricts the freedom of the main structure inside the umbrella tube, ensuring the cement umbrella does not separate from the umbrella tube, thereby effectively improving the portability of the device.

Description

Technical Field

[0001] This invention relates to the field of cement plug operation technology, specifically to an automatic cement umbrella that opens through the drill pipe for cementing. Background Technology

[0002] The drill pipe cement umbrella (or cement umbrella device) used in cementing operations is an auxiliary tool used for specific purposes in cementing operations. Cement umbrella devices are usually designed to play a specific role in the cementing process, such as preventing cement slurry from directly impacting the oil and gas reservoir, reducing cement contamination of the oil and gas reservoir, and also helping to improve the displacement efficiency of cement slurry and ensure cementing quality. Taking a certain oilfield in China as an example, this oilfield adopted an improved cement umbrella-stage clamp two-stage cementing anti-leakage cementing process in cementing operations. This process uses a two-stage cementing method. First, the cement umbrella is used to protect the oil and gas reservoir and prevent the cement slurry from directly impacting the oil and gas reservoir and causing pressure leakage. Then, the second-stage cementing operation is carried out to the wellhead. This process effectively improves cementing quality and protects oil and gas reservoir resources. With the continuous advancement of oil and gas exploration and development technology, cementing technology is also constantly developing. As an important technology in cementing operations, the cement umbrella device has also undergone a process of technological improvement from simple to complex and from inefficient to efficient.

[0003] For example, Chinese Patent (Announcement No.: CN113266306B) discloses an automatic cement umbrella opening method for cementing and its usage. The automatic cement umbrella opening method for cementing includes a bidirectional cement umbrella structure and an insertion sub structure. The bidirectional cement umbrella structure includes a first umbrella rib structure and a second umbrella rib structure. The first umbrella rib structure is inverted and sleeved on the casing. A first cement umbrella support is provided between the first umbrella rib structure and the casing. A first tensioning structure is used to tension the first umbrella rib structure in the forward direction. The second umbrella rib structure is sleeved on the casing in the forward direction. A second cement umbrella support is provided between the second umbrella rib structure and the casing. A second tensioning structure is used to tension the second umbrella rib structure in the forward direction. The casing is provided with a ball seat, which can be sealed by throwing a ball. The insertion sub structure includes a sub body, which is used to insert the bidirectional cement umbrella structure into a predetermined position in the well. This invention can effectively isolate the lower well section, facilitate cementing operations, improve cementing quality, and reduce downhole complications.

[0004] However, this device is inconvenient to carry and transport. Because the device has an open design at the bottom, its short-circuit body and bidirectional cement umbrella structure may separate under the action of gravity during actual use, making it inconvenient to carry. Therefore, an automatic cement umbrella that opens through the drill pipe is proposed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automatic openable cement umbrella for cementing drill pipe, which has advantages such as easy portability and solves the problem of the cement umbrella easily separating from the external sleeve, making it inconvenient to carry.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic opening cement umbrella for cementing, comprising an umbrella tube, an umbrella rod movably connected to the inner side of the umbrella tube, an unfolding component provided on the outer surface of the umbrella rod to ensure that the cement umbrella can be automatically opened, an unlocking component provided at the top of the umbrella rod and inside the umbrella tube to improve positioning accuracy and ensure that the cement umbrella opens smoothly at the target position, a stabilizing component provided at the top of the unlocking component and outside the umbrella tube to facilitate the transportation and carrying of the cement umbrella, the umbrella rod extending through the umbrella tube, an umbrella cup provided on the outer surface of the umbrella rod to reduce friction between the umbrella rod and the well wall, and an umbrella head fixed at the bottom of the umbrella rod;

[0007] The unlocking assembly includes an unlocking block fixed to the top of the umbrella pole. The inner side of the unlocking block is provided with two locking connectors, and a torsion spring is fixed between the two locking connectors. Each locking connector consists of a rotating column, a locking hook, and an unfolding rod. A connecting rod is fixed to the top of the unlocking block, and an auxiliary unlocking part is provided at the top of the connecting rod. A pad is fixed to the top of the auxiliary unlocking part.

[0008] The stabilizing component includes a housing fixed to the top of the pad. The top of the housing has a rotating hole that communicates with the inner cavity of the housing. A sealed bearing is fixed to the top wall of the housing within the rotating hole. A knob is rotatably connected to the inner side of the sealed bearing. A threaded rod is fixed to the bottom of the knob. A movable disk is threaded to the outer surface of the threaded rod. Two limiting holes are provided on the movable disk. Limiting rods are movably connected to the two limiting holes. Movable parts are provided on the bottom wall of the inner cavity of the housing on both the left and right sides of the threaded rod.

[0009] Furthermore, the umbrella cup is composed of two small rubber cups and two large rubber cups, which are arranged alternately. All two small rubber cups and two large rubber cups are fixed to the outer surface of the umbrella shaft, and the top of the uppermost small rubber cup abuts against the umbrella tube.

[0010] Furthermore, the unfolding assembly includes a fixing joint fixed to the outer surface of the umbrella pole, a plurality of umbrella ribs are inserted into the top of the fixing joint, the tops of the plurality of umbrella ribs are fixed to a sliding block, two umbrella fabrics are fixed to the outer surface of the umbrella pole between the fixing joint and the sliding block, and a tension spring is fixed to the bottom of the sliding block.

[0011] Furthermore, each of the umbrella fabrics has multiple stretch holes, which are adapted to multiple umbrella ribs. The umbrella rod has a spring hole and two moving slots. The spring hole is connected to the two moving slots. A stabilizing ball is fixed to the bottom of the sliding block. The outer surface of the stabilizing ball is engaged with the inner side of the stretch spring. The bottom of the stretch spring is fixed to the bottom of the spring hole.

[0012] Furthermore, each of the rotating columns is rotatably connected to the inner wall of the unlocking block via a bearing. The sliding block has two locking holes, each of which is adapted to a locking hook. Each locking hole and locking hook is arc-shaped. The side of each unfolding rod near the connecting rod is arc-shaped. An inclined block is fixed to the opposite side of the two unfolding rods.

[0013] Furthermore, the auxiliary unlocking part includes an umbrella handle fixed to the top of the connecting rod. The umbrella handle has a through hole, and a compression spring is movably connected in the through hole. A primary sleeve is fixed on both the left and right sides of the compression spring. A secondary sleeve is movably connected to the outer surface of each primary sleeve, and a tertiary sleeve is movably connected to the outer surface of each secondary sleeve. The tertiary sleeve is movably connected to the through hole on the umbrella handle.

[0014] Furthermore, the auxiliary unlocking part also includes two hinge blocks fixed to the bottom of the two three-stage sleeves and located outside the umbrella handle. Each hinge block has a hinge rod hinged to its bottom, and each hinge rod has a hinge cylinder hinged to one end near the connecting rod. The inner side of each hinge cylinder is movably connected to the tilting block.

[0015] Furthermore, limit blocks are fixed to the outer surfaces of the two primary sleeves and the two secondary sleeves at their opposite ends, and abutment blocks are fixed to the inner sides of the two secondary sleeves and the two tertiary sleeves at their opposite ends. Safety blocks are fixed to the inner sides of the through hole on both sides of the umbrella handle. Each limit block is adapted to the abutment block. Locking blocks are fixed to the outer surfaces of the two tertiary sleeves at their opposite ends. Each locking block is adapted to the safety block.

[0016] Furthermore, each of the moving parts includes a moving block movably connected to the bottom of the inner cavity of the outer shell. Each moving block has a spring groove on both its front and rear sides. Two stabilizing blocks are fixed to the inner bottom wall of the outer shell at the end near the threaded rod. The moving block is located between the two stabilizing blocks. A tension rod is hinged to the opposite side of each of the two stabilizing blocks. A connecting block is hinged to the opposite side of each of the two tension rods. A restoring spring is fixed to the end of each connecting block away from the stabilizing block. The other end of the restoring spring is fixed to the side wall of the spring groove.

[0017] Furthermore, stabilizing holes are provided on both the left and right sides of the outer shell, each stabilizing hole is adapted to a movable block, and each movable block passes through the stabilizing hole to the outside of the outer shell.

[0018] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0019] 1. This cementing device features an automatic openable cement umbrella that opens over the drill pipe. When not in use, the umbrella cup and stabilizing components work together to effectively restrict the freedom of the main structure inside the umbrella tube, ensuring that the cement umbrella will not separate from the umbrella tube, thereby effectively improving the portability of the device.

[0020] 2. This cementing system features an automatic openable cement umbrella that opens over the drill pipe. Through the cooperation of an unlocking block, a clamping joint, and a torsion spring, it can gradually unlock according to the different diameters of the umbrella tube, pipeline, and wellbore. This effectively ensures that the cement umbrella body opens quickly after detaching from the pipeline, thereby blocking the wellbore. At the same time, the auxiliary unlocking unit can improve the unlocking speed, thereby effectively improving the positioning accuracy.

[0021] 3. By combining the unfolding and unlocking components, the cement umbrella can be automatically unfolded, thereby quickly plugging the well hole and facilitating the smooth progress of subsequent work. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a perspective view of the connection relationship between the umbrella ribs and the sliding block of the present invention;

[0024] Figure 3 This is a diagram showing the connection relationship between the unlocking block and the card connector of the present invention;

[0025] Figure 4 This is a diagram showing the connection relationship between the sliding block and the snap-fit ​​connector of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the auxiliary unlocking part of the present invention;

[0027] Figure 6 This is a perspective view of the connection relationship between the hinge rod and the hinge cylinder of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the stabilizing component of the present invention.

[0029] In the diagram: 1. Umbrella tube, 2. Umbrella shaft, 3. Deployment assembly, 301. Fixing joint, 302. Umbrella rib, 303. Umbrella fabric, 304. Sliding block, 305. Tension spring, 4. Unlocking assembly, 401. Unlocking block, 402. Locking joint, 403. Torsion spring, 404. Auxiliary unlocking part, 4041. Umbrella handle, 4042. Compression spring, 4043. Primary sleeve, 4044. Secondary sleeve, 4045. Tertiary sleeve, 4046. Hinge block, 4047. Hinge rod, 4048. Hinge cylinder, 5. Stabilizing assembly, 501. Housing, 502. Knob, 503. Threaded rod, 504. Limiting rod, 505. Moving part, 5051. Moving block, 5052. Stabilizing block, 5053. Tension rod, 5054. Connecting block, 5055. Restoring spring, 506. Moving disc, 6. Umbrella cup, 7. Umbrella head. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1 to 6 This embodiment of an automatic cement umbrella for cementing includes an umbrella tube 1, with an umbrella rod 2 movably connected to the inner side of the umbrella tube 1. The umbrella rod 2, as a core component, serves to connect other components. The outer surface of the umbrella rod 2 is provided with an unfolding component 3 to ensure that the cement umbrella can be automatically opened. The unfolding component 3 can be automatically opened to ensure smooth sealing of the wellbore. The top of the umbrella rod 2, located inside the umbrella tube 1, is provided with an unlocking component 4 to improve positioning accuracy and ensure that the cement umbrella opens smoothly at the target position. The top of the unlocking component 4, located outside the umbrella tube 1, is provided with a stabilizing component 5 to facilitate the transportation and carrying of the cement umbrella. Through the cooperation of the stabilizing component 5 and the umbrella cup 6, the overall strength of the cement umbrella can be effectively improved. The umbrella rod 2 extends through the umbrella tube 1. The outer surface of the umbrella rod 2 is provided with an umbrella cup 6 to reduce the friction between the umbrella rod 2 and the well wall. The umbrella cup 6 can effectively ensure that the cement umbrella passes smoothly. The bottom of the umbrella rod 2 is fixed with an umbrella head 7.

[0032] In addition, the unfolding assembly 3 includes a fixed joint 301 fixed to the outer surface of the umbrella pole 2. Multiple umbrella ribs 302 are inserted into the top of the fixed joint 301. Each umbrella rib 302 has a certain elasticity. When the sliding block 304 moves downward, it can squeeze the umbrella ribs 302 to cause the umbrella ribs 302 to deform outward, further ensuring that the umbrella cloth 303 opens smoothly. The tops of the multiple umbrella ribs 302 are fixed to the sliding block 304. Two umbrella cloths 303 are fixed on the outer surface of the umbrella pole 2 between the fixed joint 301 and the sliding block 304. The two umbrella cloths 303 can improve the sealing effect and effectively prevent the backflow of liquid in the well hole. A tension spring 305 is fixed at the bottom of the sliding block 304. The tension spring 305 can provide power to the sliding block 304 to ensure that the sliding block 304 can smoothly squeeze and deform the umbrella ribs 302.

[0033] It should be further explained that each umbrella fabric 303 has multiple stretch holes, which are adapted to multiple umbrella ribs 302. Each umbrella rib 302 is slightly bent outward. This design ensures that the umbrella rib 302 deforms outward when compressed. The umbrella rod 2 has a spring hole and two moving slots. The spring hole is connected to the two moving slots. The moving slots can limit the sliding block 304. At the same time, the moving slots are connected to the spring hole, which can help the power of the tension spring 305 be smoothly transmitted to the sliding block 304. A stabilizing ball is fixed at the bottom of the sliding block 304. The outer surface of the stabilizing ball is engaged with the inner side of the tension spring 305. The stabilizing ball can further improve the fixing effect between the sliding block 304 and the tension spring 305. The bottom of the tension spring 305 is fixed to the bottom of the spring hole.

[0034] It is known that the unlocking component 4 includes an unlocking block 401 fixed to the top of the umbrella rod 2. The inner side of the unlocking block 401 is provided with two locking connectors 402. The length of the unfolding rod on the locking connector 402 is greater than that of the locking hook. The product of the angle and the radius is equal to the arc length. When the angle is the same, the larger the radius, the longer the arc length traveled. Therefore, when the unfolding rod abuts against the inner wall of the pipe, the locking hook will not completely disengage from the sliding block 304. A torsion spring 403 is fixed between the two locking connectors 402. Each locking connector 402 consists of a rotating column, a locking hook, and an unfolding rod. A connecting rod is fixed to the top of the unlocking block 401. An auxiliary unlocking part 404 is provided at the top of the connecting rod. A pad is fixed to the top of the auxiliary unlocking part 404. The torsion spring 403 can provide the power for the rotation of the locking connector 402. The pad can ensure that the stabilizing component 5 is outside the umbrella tube 1, further ensuring the overall stability of the device.

[0035] In addition, the auxiliary unlocking part 404 includes an umbrella handle 4041 fixed to the top of the connecting rod. The umbrella handle 4041 has a through hole, and a compression spring 4042 is movably connected in the through hole. The compression spring 4042 can ensure that the first-stage sleeve 4043 is always pressed against the inner wall of the pipe or the inner wall of the well. The first-stage sleeve 4043 is fixed on both the left and right sides of the compression spring 4042. The outer surface of each first-stage sleeve 4043 is movably connected to a second-stage sleeve 4044. The outer surface of each second-stage sleeve 4044 is movably connected to a third-stage sleeve 4045. The third-stage sleeve 4045 is movably connected to the through hole on the umbrella handle 4041.

[0036] Furthermore, the auxiliary unlocking part 404 also includes two hinge blocks 4046 fixed to the bottom of the two three-stage sleeves 4045 and located outside the umbrella handle 4041. When the three-stage sleeves 4045 move, they will drive the hinge blocks 4046 to move. The power will further pull the locking connector 402 after passing through the hinge rod 4047, which can assist the rotation of the locking connector 402. The bottom of each hinge block 4046 is hinged with a hinge rod 4047, and the end of each hinge rod 4047 near the connecting rod is hinged with a hinge cylinder 4048. The inner side of each hinge cylinder 4048 is movably connected to the inclined block. Through the cooperation of two rotating joints and one sliding joint, it can be ensured that the three-stage sleeves 4045 and the locking connector 402 will not be jammed when they move at the same time.

[0037] In addition, limit blocks are fixed to the outer surfaces of the two primary sleeves 4043 and the two secondary sleeves 4044 at their far ends, and abutment blocks are fixed to the inner sides of the two secondary sleeves 4044 and the two tertiary sleeves 4045 at their near ends. Safety blocks are fixed to the inner sides of the through hole on both sides of the umbrella handle 4041. Each limit block is adapted to the abutment block. The limit block and the abutment block cooperate to smoothly pull the secondary sleeve 4044 after the primary sleeve 4043 moves to the limit position of the groove. When the secondary sleeve 4044 moves to the limit position, it can pull the tertiary sleeve 4045. Locking blocks are fixed to the outer surfaces of the two tertiary sleeves 4045 at their opposite ends. Each locking block is adapted to the safety block. The locking block and the safety block cooperate to prevent the tertiary sleeve 4045 from completely separating from the umbrella handle 4041, thereby effectively improving the stability of the device.

[0038] In this embodiment, the cooperation between the unfolding component 3 and the unlocking component 4 effectively improves the response speed of the umbrella fabric 303, further enhancing the positioning accuracy of the device and ensuring that the cement umbrella unfolds smoothly in the appropriate position, thereby facilitating the smooth progress of subsequent work.

[0039] Please refer to it again. Figure 1 and Figure 7To improve the portability of the device, the stabilizing component 5 in this embodiment includes a housing 501 fixed to the top of the pad. A rotating hole is provided on the top of the housing 501, communicating with the inner cavity of the housing 501. A sealed bearing is fixed to the top wall of the housing 501 within the rotating hole. The sealed bearing prevents dust and other particles from entering the interior, ensuring the surface of the threaded rod 503 is sufficiently clean, further ensuring smooth operation of the device. A knob 502 is rotatably connected to the inner side of the sealed bearing. A hexagonal groove is provided on the top of the knob 502, and the top of the knob 502 is connected to the top of the housing 501. Located on the same horizontal plane, the recessed design of the knob 502 ensures that the top of the outer shell 501 remains flat, facilitating subsequent pressure application. A threaded rod 503 is fixed to the bottom of the knob 502, and a movable disk 506 is threadedly connected to the outer surface of the threaded rod 503. Two limiting holes are opened on the movable disk 506, and a limiting rod 504 is movably connected in the two limiting holes. The limiting rod 504 can limit the movable disk 506 and prevent the limiting rod 504 from rotating with the threaded rod 503. Movable parts 505 are provided on the bottom wall of the inner cavity of the outer shell 501 and on both the left and right sides of the threaded rod 503.

[0040] It is understood that each moving part 505 includes a moving block 5051 movably connected to the bottom of the inner cavity of the housing 501. Each moving block 5051 has spring grooves on both its front and rear sides. Two stabilizing blocks 5052 are fixed to the inner bottom wall of the housing 501, near the end close to the threaded rod 503. The moving block 5051 is located between the two stabilizing blocks 5052. The two stabilizing blocks 5052 improve the stability of the moving block 5051, ensuring its smooth movement. The opposite sides of the two stabilizing blocks 5052 are hinged. A tension rod 5053 is connected, and a connecting block 5054 is hinged to one side of each tension rod 5053. A restoring spring 5055 is fixed to the end of each connecting block 5054 away from the stabilizing block 5052. The restoring spring 5055 can provide the restoring power for the moving block 5051. When the moving disk 506 moves upward under the control of the threaded rod 503, the restoring spring 5055 can release the accumulated elastic potential energy to help the moving block 5051 return to its position smoothly. The other end of the restoring spring 5055 is fixed to the side wall of the spring groove.

[0041] Furthermore, stabilizing holes are provided on both the left and right sides of the outer casing 501. Each stabilizing hole is adapted to the moving block 5051. Each moving block 5051 extends through the stabilizing hole to the outside of the outer casing 501. The side wall of the outer casing 501 can limit the moving block 5051. The stability of the moving block 5051 is further improved by the limiting effect of the stabilizing block 5052.

[0042] It should be further explained that the umbrella bowl 6 consists of two small rubber bowls and two large rubber bowls, which are arranged alternately. This alternating arrangement ensures both sealing and lubrication, helping the cement umbrella to pass smoothly through the pipe. Both the two small and two large rubber bowls are fixed to the outer surface of the umbrella rod 2. The top of the uppermost small rubber bowl abuts against the umbrella tube 1. Through the abutment between the small rubber bowl and the umbrella tube 1, and the limiting effect of the stabilizing component 5, it can be ensured that the cement umbrella inside the umbrella tube 1 will not detach from the umbrella tube 1, thereby improving the portability of the device.

[0043] In this embodiment, the recessed design of the knob 502 can improve the flatness of the top of the outer shell 501, ensuring that the cement umbrella passes smoothly and stably in the pipe. Furthermore, the cooperation between the umbrella bowl 6 and the stabilizing component 5 can ensure that the cement umbrella will not detach from the umbrella tube 1 during transportation and carrying, making it easy to carry.

[0044] Understandably, by using the unfolding component 3 and the unlocking component 4 together, the system can achieve step-by-step unlocking, which shortens the unlocking journey and increases the unlocking speed, thereby further improving the sealing efficiency. By using the umbrella bowl 6 and the stabilizing component 5 together, it can be ensured that the cement umbrella will not separate from the umbrella tube 1 during carrying, thus greatly improving portability.

[0045] The working principle of the above embodiments is as follows:

[0046] (1) When using, first select a pipe of appropriate length, extend the pipe to the specified end of the well hole, then place the device at the pipe opening, and align the protruding part of the umbrella tube 1 with the pipe opening. Then, insert a special tool or other tool of appropriate size and shape into the top of the knob 502 and rotate it to drive the knob 502 to rotate. The threaded rod 503 will rotate with the knob 502 and cooperate with the two limit rods 504 to enable the moving plate 506 to move upward smoothly. When the moving plate 506 moves upward, the restoring spring 5055 will pull the moving block 5051 back, thereby ensuring that the cement umbrella can be smoothly separated from the umbrella tube 1 and enter the pipe.

[0047] (2) After the cement umbrella enters the pipe, since the pipe diameter is larger than the umbrella tube 1, under the action of the torsion spring 403, the top of the clamp 402 will move further away from the connecting rod and fit against the inner wall of the pipe. At the same time, the bottom of the clamp 402 will separate from the sliding block 304. Meanwhile, the first-stage sleeve 4043 and the second-stage sleeve 4044 extend under the action of the compression spring 4042, causing the left and right sides of the first-stage sleeve 4043 to abut against the inner wall of the pipe. By applying pressure at the pipe opening, a special long stick or water can be used to make the cement umbrella body pass through the pipe until the cement umbrella separates from the pipe.

[0048] (3) When the cement umbrella separates from the pipe, since the top of the clamp 402 and the two ends of the first-stage sleeve 4043 are no longer restricted by the pipe, the third-stage sleeve 4045 moves outward. The power is transmitted to the hinge cylinder 4048 through the hinge rod 4047, which further pulls the clamp 402. At the same time, the elastic potential energy of the torsion spring 403 causes the clamp 402 to rotate quickly, ensuring that the bottom of the clamp 402 is quickly and completely separated from the sliding block 304.

[0049] (4) When the sliding block 304 is fully unlocked, it will move downward quickly under the combined action of its own weight and the tension spring 305. Since the position of the fixed joint 301 relative to the umbrella rod 2 will not change, when the sliding block 304 moves downward, it will press on multiple umbrella ribs 302, causing multiple umbrella ribs 302 to deform outward, thereby driving the two umbrella cloths 303 to unfold smoothly and realize the rapid sealing of the well hole.

[0050] (5) The device can automatically open the cement umbrella through the unfolding component 3. Then, through the fast unlocking feature of the unlocking component 4, in conjunction with the umbrella tube 1, pipe and well hole, it can achieve graded unlocking and fast unlocking, which can significantly shorten the unlocking journey in the well hole. The high unlocking speed further shortens the unlocking time, thereby achieving precise positioning. Finally, through the umbrella bowl 6 and the stabilizing component 5, the freedom of the cement umbrella body can be effectively restricted, further improving the stability of the cement umbrella in the umbrella tube 1, making it convenient to carry and transport.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An automatic opening cement umbrella for cementing drill pipe, comprising an umbrella tube (1), characterized in that: The umbrella tube (1) is movably connected to the inner side of the umbrella rod (2). The outer surface of the umbrella rod (2) is provided with an unfolding component (3) to ensure that the cement umbrella can be opened automatically. The top of the umbrella rod (2) and located inside the umbrella tube (1) is provided with an unlocking component (4) to improve positioning accuracy and ensure that the cement umbrella opens smoothly at the target position. The top of the unlocking component (4) and located outside the umbrella tube (1) is provided with a stabilizing component (5) to facilitate the transportation and carrying of the cement umbrella. The umbrella rod (2) extends through the outside of the umbrella tube (1). The outer surface of the umbrella rod (2) is provided with an umbrella cup (6) to reduce the friction between the umbrella rod (2) and the well wall. The bottom of the umbrella rod (2) is fixed with an umbrella head (7). The unlocking assembly (4) includes an unlocking block (401) fixed to the top of the umbrella pole (2). The unlocking block (401) has two locking connectors (402) on its inner side. A torsion spring (403) is fixed between the two locking connectors (402). Each locking connector (402) consists of a rotating column, a locking hook and an unfolding rod. A connecting rod is fixed to the top of the unlocking block (401). An auxiliary unlocking part (404) is provided on the top of the connecting rod. A pad is fixed to the top of the auxiliary unlocking part (404). The stabilizing component (5) includes a housing (501) fixed to the top of the pad. The top of the housing (501) has a rotating hole that communicates with the inner cavity of the housing (501). A sealed bearing is fixed on the top wall of the housing (501) and inside the rotating hole. A knob (502) is rotatably connected to the inner side of the sealed bearing. A threaded rod (503) is fixed to the bottom of the knob (502). A movable disk (506) is threadedly connected to the outer surface of the threaded rod (503). Two limiting holes are opened on the movable disk (506). Limiting rods (504) are movably connected in the two limiting holes. Movable parts (505) are provided on the bottom wall of the inner cavity of the housing (501) and on the left and right sides of the threaded rod (503). The auxiliary unlocking part (404) includes an umbrella handle (4041) fixed to the top of the connecting rod. The umbrella handle (4041) has a through hole, and a compression spring (4042) is movably connected in the through hole. A first-stage sleeve (4043) is fixed on both the left and right sides of the compression spring (4042). A second-stage sleeve (4044) is movably connected to the outer surface of each first-stage sleeve (4043). A third-stage sleeve (4045) is movably connected to the outer surface of each second-stage sleeve (4044). The third-stage sleeve (4045) is movably connected to the through hole on the umbrella handle (4041). The auxiliary unlocking part (404) also includes two hinge blocks (4046) fixed to the bottom of the two three-stage sleeves (4045) and located outside the umbrella handle (4041). Each hinge block (4046) has a hinge rod (4047) hinged to its bottom. Each hinge rod (4047) has a hinge cylinder (4048) hinged to one end near the connecting rod. The inner side of each hinge cylinder (4048) is movably connected to the tilting block. Each of the moving parts (505) includes a moving block (5051) movably connected to the bottom of the inner cavity of the housing (501). Each moving block (5051) has a spring groove on both its front and rear sides. Two stabilizing blocks (5052) are fixed to the inner bottom wall of the housing (501) at one end near the threaded rod (503). The moving block (5051) is located between the two stabilizing blocks (5052). A tension rod (5053) is hinged to one side of each of the two stabilizing blocks (5052). A connecting block (5054) is hinged to one side of each of the two tension rods (5053). A restoring spring (5055) is fixed to one end of each connecting block (5054) away from the stabilizing block (5052). The other end of the restoring spring (5055) is fixed to the side wall of the spring groove.

2. The automatic opening cement umbrella for cementing through the drill pipe according to claim 1, characterized in that: The umbrella bowl (6) consists of two small rubber bowls and two large rubber bowls. The two small rubber bowls and the two large rubber bowls are arranged alternately. The two small rubber bowls and the two large rubber bowls are fixed to the outer surface of the umbrella rod (2). The top of the small rubber bowl located at the top abuts against the umbrella tube (1).

3. The automatic opening cement umbrella for cementing through the drill pipe according to claim 1, characterized in that: The unfolding assembly (3) includes a fixing joint (301) fixed to the outer surface of the umbrella pole (2), a plurality of umbrella ribs (302) are inserted into the top of the fixing joint (301), the top of the plurality of umbrella ribs (302) are fixed to a sliding block (304), two umbrella fabrics (303) are fixed to the outer surface of the umbrella pole (2) between the fixing joint (301) and the sliding block (304), and a tension spring (305) is fixed to the bottom of the sliding block (304).

4. The automatic opening cement umbrella for cementing through the drill pipe according to claim 3, characterized in that: Each of the umbrella fabrics (303) has multiple stretch holes, which are adapted to multiple umbrella ribs (302). The umbrella rod (2) has a spring hole and two moving slots. The spring hole is connected to the two moving slots. The bottom of the sliding block (304) is fixed with a stabilizing ball. The outer surface of the stabilizing ball is engaged with the inner side of the tension spring (305). The bottom of the tension spring (305) is fixed with the bottom of the spring hole.

5. The automatic opening cement umbrella for cementing through the drill pipe according to claim 3, characterized in that: Each of the rotating columns is rotatably connected to the inner wall of the unlocking block (401) via a bearing. The sliding block (304) has two locking holes, each of which is adapted to a locking hook. Each locking hole and locking hook is arc-shaped. The side of each unfolding rod near the connecting rod is arc-shaped. An inclined block is fixed on the opposite side of the two unfolding rods.

6. The automatic opening cement umbrella for cementing through the drill pipe according to claim 1, characterized in that: Limiting blocks are fixed to the outer surfaces of the two primary sleeves (4043) and the two secondary sleeves (4044) at their opposite ends. Abutting blocks are fixed to the inner sides of the two secondary sleeves (4044) and the two tertiary sleeves (4045) at their opposite ends. Safety blocks are fixed to the inner sides of the through hole on the left and right sides of the umbrella handle (4041). Each limiting block is adapted to the abutting block. Locking blocks are fixed to the outer surfaces of the two tertiary sleeves (4045) at their opposite ends. Each locking block is adapted to the safety block.

7. The automatic opening cement umbrella for cementing through the drill pipe according to claim 1, characterized in that: The outer casing (501) has stabilizing holes on both the left and right sides. Each stabilizing hole is adapted to a movable block (5051), and each movable block (5051) extends through the stabilizing hole to the outside of the outer casing (501).

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