A completion packer with misplacement prevention and method of use

Abstract

The application discloses a kind of well completion packers with anti-misplacement structure and use method, it is related to packer technical field.The seat body one, adjusting rod, limit sleeve and limit column are included, the adjusting rod is vertically limited and slides in the corresponding recess in seat body one inside by top outside convex, anti-misplacement mechanism is arranged between seat body one middle section inside and adjusting rod, and the anti-misplacement mechanism is used to prevent packer from misplacement when sliding in well pipe;By being provided with anti-misplacement mechanism, adjusting seat, cleaning block and limit sleeve, it is guaranteed that packer is stable in the process of sliding down before packer is lowered into well pipe to preset seat seal position, avoid misplacement of moving parts, by being provided with driving assembly, cleaning block and adjusting assembly, packer is cleaned in the process of being lowered into well pipe, both stability in the process of packer lowering into and running are guaranteed, and the wear of equipment parts by adhering matter is avoided, and equipment service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a well completion packer with an anti-dislocation structure and its usage method. Background Technology

[0002] In oil and gas well completion operations, packers are the core sealing and separation tools. Their operational stability directly determines the completion quality, operational efficiency, and wellbore safety. They are mainly used to separate different pressure zones within the wellbore and ensure the smooth progress of oil and gas extraction.

[0003] However, the anti-dislocation mechanism in existing completion packers has a relatively simple structural design. During the well casing process, factors such as downhole fluid disturbance, uneven casing walls, and packer's own weight imbalance can easily lead to abnormal dislocation of internal moving parts. This not only disrupts the coordination of the various components but may also cause parts to jam or become stuck, affecting the normal installation of the packer and delaying the operation. On the other hand, most existing completion packers do not have a synchronous casing wall cleaning structure. Mud lumps and other deposits attached to the inner wall of the casing can further exacerbate the risk of dislocation during packer installation. They can also strongly rub against the rubber sleeve when the packer is set, causing damage to the rubber sleeve, poor sealing, and sealing failures such as interlayer flow.

[0004] To address the aforementioned issues, innovative designs are urgently needed based on existing approaches. Summary of the Invention

[0005] The purpose of this invention is to provide a well completion packer with an anti-misalignment structure and a method of use to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a well completion packer with an anti-displacement structure, comprising a base body one, an adjusting rod, a limiting sleeve, and a limiting column. The adjusting rod is vertically limited and slidable within a corresponding groove on the inner side of the base body one via a protrusion on its outer top. An anti-displacement mechanism is provided between the inner side of the middle section of the base body one and the adjusting rod. The anti-displacement mechanism is used to prevent the packer from displacing when sliding inside the well casing. A rubber sleeve, an adjusting seat, and a base body two are sequentially arranged below the base body one, and the rubber sleeve, adjusting seat, and base body two are all sleeved on the outer side of the adjusting rod. The outer circumferentially equidistant conical section below the adjusting seat... Multiple top blocks are fixed, and the lower ends of the top blocks are connected to locking blocks. The locking blocks are slidably installed in multiple grooves on the top of the base body two by means of spring limiting. The outer side of the middle section of the base body two has three mounting grooves from top to bottom: mounting groove one, mounting groove two, and mounting groove three. A rotating sleeve one is rotatably installed in mounting groove one, and a rotating sleeve two is rotatably installed in mounting groove three. A driving component is provided between mounting groove two and rotating sleeve one and rotating sleeve two. A cleaning block is slidably connected in the groove above rotating sleeve one and the groove below rotating sleeve two by means of spring limiting. An adjustment component is provided between two cleaning blocks.

[0007] Optionally, a limiting sleeve is fixedly connected to the outer side of the lower section of the adjusting rod. The limiting sleeve is rotatably and slidably installed in the lower end hole groove of the inner side of the second seat. A limiting post is slidably connected in the groove on the outer side of the limiting sleeve. The limiting post is fixed on the wall of the lower end hole groove on the inner side of the second seat. The length of the transverse rotation section of the groove on the outer side of the limiting sleeve is used for the misalignment and overlap of the gap between the top block and the slip block.

[0008] Optionally, two vertical grooves are symmetrically formed on the inner wall of the adjusting seat. The vertical grooves in the inner wall of the adjusting seat are used for the vertical sliding of the outer protrusion of the middle section of the adjusting rod. An annular groove is connected below the vertical grooves in the inner wall of the adjusting seat. The annular groove in the inner wall of the adjusting seat is used for the rotational sliding of the outer protrusion of the middle section of the adjusting rod. The length of the vertical groove in the inner wall of the adjusting seat corresponds to the vertical length of the groove on the outer side of the limiting sleeve.

[0009] Optionally, the anti-misalignment mechanism includes an adjusting tube and multiple sliding grooves. The multiple sliding grooves are equidistantly spaced circumferentially on the inner side of the middle section of the base. A support block is slidably connected to the sliding groove by a spring. A tapered tube is abutted to the upper protruding inclined surface of the inner side of the multiple support blocks. The tapered tube slides vertically in the corresponding groove position on the inner side of the base by a spring. The adjusting tube is abutted to the upper end of the tapered tube by symmetrical protrusions on the outer side. The adjusting tube is slidably sleeved on the outer side of the adjusting rod and slides vertically in the base. An electric push rod is connected to the outer side of the upper end of the adjusting tube. The electric push rod is fixed in the corresponding groove in the upper section of the base by an outer mounting bracket.

[0010] Optionally, the drive assembly includes a drive gear disk, which is rotatably mounted inside the mounting slot two. The lower end of the drive gear disk has symmetrically meshed inner teeth with a gear disk one and a double gear one. The gear disk one is mounted on the circular side wall of the inner cavity of the mounting slot two via a motor. The double gear one penetrates the bottom of the mounting slot two and is connected to the upper inner teeth of the rotating sleeve two through its lower teeth. The upper outer teeth of the drive gear disk are meshed with the double gear two. The double gear two penetrates the top of the mounting slot two and is connected to the lower inner teeth of the rotating sleeve two through its upper teeth. The drive assembly is used for the rotating sleeve one and the rotating sleeve two to rotate in opposite directions.

[0011] Optionally, the adjustment assembly includes two conical tubes, the upper conical tube sliding against the cleaning block inside the rotating sleeve through its outer inclined surface, and the lower conical tube sliding against the cleaning block inside the rotating sleeve through its outer inclined surface. The upper conical tube is vertically slidably fitted onto the circular sidewall of the inner cavity of the mounting groove through a spring, and the lower conical tube is vertically slidably fitted onto the circular sidewall of the inner cavity of the mounting groove through a spring. The outer conical inclined surfaces of the two conical tubes correspond to the outer conical inclined surfaces of the first conical tube, and the upper inclined surfaces of the two cleaning blocks correspond to the outer conical inclined surfaces of the two conical tubes. One end of each cleaning block is designed with a triangular scraper.

[0012] Optionally, the adjustment assembly further includes an adjustment tube two. The adjustment tube two is connected to the upper ends of the two tapered tubes two by passing through the mounting groove one and the mounting groove two through the symmetrical protrusions on the upper and lower outer sides. The adjustment tube two is slidably sleeved on the outside of the adjustment rod and slides vertically in the seat body two. An electric push rod two is connected to the outer side of the upper end of the adjustment tube two. The electric push rod two is fixed in the corresponding groove on the upper section of the seat body two by the outer mounting bracket.

[0013] Optionally, the method includes the following steps: S1: Connect the connecting rod to the adjusting rod, and put the well pipe into the ground lowering mechanism. The controller turns on the electric push rod one, which drives the adjusting pipe one and the tapered pipe one to slide down, pushing the support block one to slide outward along the slide groove one until it contacts the inner wall of the well pipe to achieve anti-misalignment. S2: When electric actuator one is started, electric actuator two is opened simultaneously, which drives the adjustment tube two to slide down. Its upper and lower protrusions abut against the cone tube two, pushing the cleaning blocks inside rotating sleeve one and rotating sleeve two to slide outward until they abut against the tube wall, thus completing the adaptive adjustment. S3: When the packer is lowered, the controller starts the motor to drive the gear disk one, which drives the drive gear disk to rotate. Through the transmission of double gear one and double gear two, it drives the rotating sleeve one, rotating sleeve two and cleaning block to rotate in both directions to complete the pipe wall cleaning. S4: After the packer is lowered to the preset position, rotate the adjusting rod to make the limiting post slide into the vertical groove, and drive the adjusting seat and the slip block to be misaligned. Then move the seat body down to squeeze the rubber cylinder and push the slip block to clamp, completing the clamping of the slip block and the pipe wall, as well as the sealing of the pipe wall by the deformation of the rubber cylinder. Rotate the adjusting rod in the opposite direction to limit the position and complete the sealing.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the setting of an anti-misalignment mechanism, an adjustment component, and a cleaning block, ensures that during the packer well casing lowering and sealing operation, the anti-misalignment mechanism, via an electric actuator, drives the adjustment tube to slide down, pushing the tapered tube to compress the spring, causing the support block to slide outward along the slide groove and tightly contact the inner wall of the well casing. Simultaneously, an electric actuator drives the adjustment tube to slide down, pushing the tapered tube to make the cleaning block contact the casing wall. This double contact ensures a smooth descent of the packer and prevents misalignment of moving parts. Upon reaching the sealing position, the adjustment rod rotates, causing the limiting sleeve to rotate, allowing the limiting post to slide into the vertical groove. At the same time, the protrusion in the middle section of the adjustment rod causes the adjustment seat, top block, and slip block to misalign. Subsequently, the adjustment rod drives the seat body to move down, compressing the rubber cylinders and pushing the slip block to clamp the casing wall through the adjustment seat. Then, the seat body continues to move down, compressing and deforming a pair of rubber cylinders, causing multiple rubber cylinders to seal the well casing, thus completing the well casing sealing.

[0015] This invention, through the coordinated control of the anti-misalignment mechanism, adjustment components, and drive components, not only achieves anti-misalignment protection for the packer, but also further enhances the protective effect through pipe wall cleaning, ensuring stable operation of the equipment. During the packer lowering process, the anti-misalignment mechanism, adjustment assembly, and drive assembly are activated synchronously. This causes electric push rod one to move adjustment tube one and cone tube one, causing support block one to contact the tube wall, thus preventing misalignment during the packer's descent. Simultaneously, electric push rod two drives adjustment tube two and cone tube two, causing the upper and lower cleaning blocks to contact the tube wall. Subsequently, the motor drives gear disc one to rotate, and through the transmission of the drive gear disc, double gear one, and double gear two, drives rotating sleeve one and rotating sleeve two to rotate in opposite directions. This, in turn, causes the cleaning blocks to rotate bidirectionally to clean the tube wall deposits. With the combined effect of both, the contact and limiting of support block one prevents the packer from being misaligned as a whole, while the rotation of the cleaning blocks removes the tube wall deposits, preventing the deposits from contacting the moving parts of the packer and causing misalignment. This also clears obstacles for the subsequent setting process, ensuring the stability of the packer during lowering and operation, preventing wear on equipment parts by deposits, and extending the service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall cross-sectional internal structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3This is a schematic diagram of the structure of the base body, adjusting rod, anti-misalignment mechanism, rubber sleeve and adjusting seat of the present invention; Figure 4 This is a schematic diagram of the two-section structure of the adjusting rod and the base of the present invention; Figure 5 This is a schematic diagram showing the disassembled structure of the second base, the adjusting base, the first rotating sleeve, the driving assembly, and the cleaning block of the present invention; Figure 6 for Figure 5 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the structure of the first rotating sleeve, the second rotating sleeve, the driving component, and the adjusting component of the present invention; Figure 8 This is a schematic diagram of the structure of the regulating component and the driving component of the present invention; Figure 9 This is a schematic diagram of the driving component and the base of the present invention. Figure 10 for Figure 1 Enlarged diagram of point A in the middle.

[0017] In the diagram: 1. Base 1; 2. Adjusting rod; 3. Anti-misalignment mechanism; 31. Slide groove 1; 32. Support block 1; 33. Conical tube 1; 34. Adjusting tube 1; 35. Electric push rod 1; 4. Rubber sleeve; 5. Adjusting seat; 51. Top block; 52. Slip block; 6. Base 2; 61. Mounting slot 1; 62. Mounting slot 2; 63. Mounting slot 3; 71. Rotating sleeve 1; 73. Rotating sleeve 2; 8. Drive assembly; 81. Drive gear; 82. Gear 1; 83. Double gear 1; 84. Double gear 2; 9. Cleaning block; 10. Adjusting assembly; 101. Conical tube 2; 102. Adjusting tube 2; 103. Electric push rod 2; 11. Limiting sleeve; 12. Limiting post. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the following detailed description is provided in conjunction with the accompanying drawings and preferred embodiments, based on the specific implementation methods, structures, features and effects of the present invention. Example

[0019] Please see Figures 1 to 10This invention provides a technical solution: a well completion packer with an anti-dislocation structure, comprising a base 1, an adjusting rod 2, a limiting sleeve 11, and a limiting column 12. The adjusting rod 2 is vertically limited and slidable within a corresponding groove on the inner side of the base 1 via a protrusion on its outer top. An anti-dislocation mechanism 3 is provided between the inner side of the middle section of the base 1 and the adjusting rod 2. The anti-dislocation mechanism 3 includes an adjusting pipe 34 and multiple sliding grooves 31. The multiple sliding grooves 31 are circumferentially and equidistantly opened on the inner side of the middle section of the base 1. A support block 32 is slidably connected to the sliding groove 31 by a spring. A tapered tube 33 is abutted and connected to the upper protruding inclined surface of the inner side of the multiple support blocks 32. The tapered tube 33 slides vertically within the inner side of the base 1 by a spring. According to the groove position, the adjusting tube 34 is connected to the upper end of the tapered tube 33 by symmetrical protrusions on the outside. The adjusting tube 34 is slidably sleeved on the outside of the adjusting rod 2 and slides vertically in the seat body 1. The upper outer side of the adjusting tube 34 is connected to the electric push rod 35. The electric push rod 35 is fixed in the corresponding groove of the upper section of the seat body 1 by the outer mounting bracket. The anti-displacement mechanism 3 is used to prevent the packer from being displaced when sliding in the well pipe. The rubber sleeve 4, the adjusting seat 5 and the seat body 6 are arranged in sequence below the seat body 1. The rubber sleeve 4, the adjusting seat 5 and the seat body 6 are all sleeved on the outside of the adjusting rod 2. Multiple top blocks 51 are fixed equidistantly on the outer circumferential side of the tapered section below the adjusting seat 5. The lower ends of the top blocks 51 are connected to the groove. Multiple locking blocks 52 are slidably mounted in multiple grooves on the top of the second seat 6 via spring limiting. Two vertical grooves are symmetrically formed on the inner wall of the adjusting seat 5. These vertical grooves are used for the vertical sliding of the outer protrusion of the middle section of the adjusting rod 2. An annular groove is connected below these vertical grooves, allowing for the rotational sliding of the outer protrusion of the middle section of the adjusting rod 2. A limiting sleeve 11 is fixedly connected to the outer side of the lower section of the adjusting rod 2. The limiting sleeve 11 is slidably mounted in the lower inner end groove of the second seat 6. A limiting post 12 is slidably connected in the outer groove of the limiting sleeve 11. The limiting post 12 is fixed to the lower inner end groove wall of the second seat 6. The length of the transverse rotating section of the outer groove of 11 is used for the misalignment and overlap of the gap between the top block 51 and the slip block 52. The length of the vertical groove in the inner wall of the adjusting seat 5 corresponds to the vertical length of the outer groove of the limiting sleeve 11. The middle section of the seat body 6 has three mounting grooves from top to bottom: mounting groove 1 61, mounting groove 2 62, and mounting groove 3 63. A rotating sleeve 1 71 is rotatably installed in mounting groove 1 61, and a rotating sleeve 2 73 is rotatably installed in mounting groove 3 63. A driving component 8 is provided between mounting groove 2 62 and rotating sleeve 1 71 and rotating sleeve 2 73. A cleaning block 9 is slidably connected by a spring limit in the groove above rotating sleeve 1 71 and in the groove below rotating sleeve 2 73. An adjusting component 10 is provided between the two cleaning blocks 9. Before the packer is lowered into the well casing to the preset sealing position, the anti-misalignment mechanism 3 drives the regulating tube 34 to slide down through the electric push rod 35, pushing the tapered tube 33 to compress the spring, causing the support block 32 to slide outward along the slide groove 31 and closely contact the inner wall of the well casing. At the same time, the electric push rod 103 drives the regulating tube 102 to slide down, pushing the tapered tube 101 to make the cleaning block 9 contact the pipe wall. The double contact ensures that the packer slides down smoothly and avoids misalignment of moving parts. Once the sealing position is reached, the motor is turned off to restore the anti-misalignment mechanism 3 to its initial state. The adjustment rod 2 rotates, causing the limit sleeve 11 to rotate, so that the limit post 12 slides into the vertical groove. At the same time, the protrusion in the middle section of the adjustment rod 2 causes the adjustment seat 5, the top block 51 and the slip block 52 to misalign. Then, the adjustment rod 2 drives the seat body 1 to move down, squeezing the rubber cylinder 4 and pushing the slip block 52 to clamp the pipe wall through the adjustment seat 5. Then, the seat body 1 continues to move down to squeeze and deform the rubber cylinder 4, so that multiple rubber cylinders 4 seal the well pipe and complete the sealing of the well pipe. Example

[0020] Based on Example 1, please refer to Figures 1 to 10The present invention provides a technical solution: a driving assembly 8 is provided between the mounting groove 2 62 and the rotating sleeve 1 71 and rotating sleeve 2 73. The driving assembly 8 includes a driving gear disk 81, which is rotatably mounted inside the mounting groove 2 62. The lower end of the driving gear disk 81 has symmetrically meshed teeth with a gear disk 1 82 and a double gear 1 83. The gear disk 1 82 is mounted on the circular side wall of the inner cavity of the mounting groove 2 62 by a motor. The double gear 1 83 passes through the bottom of the mounting groove 2 62 and engages with the upper inner teeth of the rotating sleeve 2 73 through its lower teeth. The drive gear 81 is connected to a double gear 84 at its upper outer toothed end. The double gear 84 passes through the top of the mounting groove 62 and connects to the inner toothed end of the rotating sleeve 73 below through its upper toothed end. The drive assembly 8 is used for the rotating sleeve 71 and rotating sleeve 73 to rotate in opposite directions. Cleaning blocks 9 are slidably connected to the grooves above rotating sleeve 71 and below rotating sleeve 73 by spring limits. An adjustment assembly 10 is provided between the two cleaning blocks 9. The adjustment assembly 10 includes two tapered tubes 101. The upper tapered tube 101 is connected to the outer toothed end of the rotating sleeve 73 through its upper toothed end. The side slope surface slides against the cleaning block 9 inside the rotating sleeve 71. The lower cone tube 101 slides against the cleaning block 9 inside the rotating sleeve 73 via its outer slope surface. The upper cone tube 101 is vertically slidably fitted onto the circular side wall of the inner cavity of the mounting groove 61 via a spring. The lower cone tube 101 is vertically slidably fitted onto the circular side wall of the inner cavity of the mounting groove 62 via a spring. The outer conical slope surfaces of the two cone tubes 101 correspond to the outer conical slope surfaces of the cone tube 33. The upper slope surfaces of the two cleaning blocks 9 correspond to the outer conical slope surfaces of the two cone tubes 101. Correspondingly, one end of the cleaning block 9 is designed with a triangular scraper; the adjustment assembly 10 also includes an adjustment tube 2 102, which is connected to the upper ends of the two tapered tubes 2 101 by passing through the mounting groove 1 61 and the mounting groove 2 62 through the symmetrical protrusions on the upper and lower outer sides. The adjustment tube 2 102 is slidably sleeved on the outside of the adjustment rod 2, and the adjustment tube 2 102 slides vertically in the seat body 2 6. An electric push rod 2 103 is connected to the outer side of the upper end of the adjustment tube 2 102, and the electric push rod 2 103 is fixed in the corresponding groove on the upper section of the seat body 2 6 by the outer mounting bracket. During the packer lowering process, the anti-misalignment mechanism 3 is activated synchronously with the adjustment component 10 and the drive component 8. This causes the electric push rod 35 to move the adjustment tube 34 and the cone tube 33, causing the support block 32 to abut against the tube wall, thus achieving anti-misalignment positioning during the packer's descent and preventing abnormal misalignment of moving parts due to shaking. Simultaneously, the electric push rod 103 drives the adjustment tube 102 and the cone tube 101 to move, causing the upper and lower cleaning blocks 9 to abut against the tube wall. Then, the controller starts the motor to drive the gear disc 82 to rotate, causing the meshing drive gear disc 81 to rotate synchronously. When the drive gear disc 81 rotates, it drives the double gear 83 to rotate in the same direction through the lower inner tooth. The double gear 83 meshes with the inner side of the rotating sleeve 73 through the lower outer tooth, causing the rotating sleeve 73 and the cleaning block 9 in its groove to rotate synchronously. During this process, the drive gear disc 81 rotates. The upper outer toothed opening drives the double gear 84 to rotate in the opposite direction. The double gear 84 meshes with the inner side of the rotating sleeve 71 through the upper outer toothed opening, driving the rotating sleeve 71 and the cleaning block 9 in its groove to rotate synchronously in the opposite direction. This allows the cleaning block 9 in the grooves of the rotating sleeve 71 and the rotating sleeve 73 to fit against the sliding tapered tube 101 and rotate in both directions in the corresponding mounting grooves 61 and 63, respectively. The cleaning block 9 also fits against the well pipe wall for bidirectional rotational cleaning. Under the combined action of the two, the fitting and limiting of the support block 32 prevents the packer from being misaligned as a whole, while the rotational cleaning of the cleaning block 9 removes the deposits on the pipe wall, preventing the deposits from hitting the moving parts of the packer and causing misalignment. At the same time, it clears obstacles for the subsequent setting process, ensuring the stability of the packer during installation and operation, and preventing the deposits from wearing down the equipment parts and extending the service life of the equipment. Example

[0021] As one embodiment of the present invention, the method includes the following steps: S1: Connect the connecting rod to the adjusting rod 2, and put the well pipe in through the ground lowering mechanism. The controller turns on the electric push rod 35, which drives the adjusting pipe 34 and the tapered pipe 33 to slide down, pushing the support block 32 to slide outward along the slide groove 31 until it contacts the inner wall of the well pipe to prevent misalignment. S2: When electric actuator 135 is started, electric actuator 2103 is opened simultaneously, which drives the adjustment tube 2102 to slide down. Its upper and lower protrusions abut against the cone tube 2101, pushing the cleaning block 9 in the rotating sleeve 171 and rotating sleeve 273 to slide outward until it abuts against the tube wall, thus completing the adaptive adjustment. S3: When the packer is lowered, the controller starts the motor to drive the gear disk 82, which drives the drive gear disk 81 to rotate. Through the transmission of double gear 83 and double gear 84, the rotating sleeve 71, rotating sleeve 73 and cleaning block 9 are driven to rotate in both directions to complete the pipe wall cleaning. S4: After the packer is lowered to the preset position, rotate the adjusting rod 2 to make the limiting post 12 slide into the vertical groove, and drive the adjusting seat 5 and the slip block 52 to be misaligned. Then move the seat body 1 down to squeeze the rubber cylinder 4 and push the slip block 52 to clamp, completing the clamping of the slip block 52 and the pipe wall, as well as the sealing of the pipe wall by the deformation of the rubber cylinder 4. Rotate the adjusting rod 2 in the opposite direction to limit the position and complete the sealing.

[0022] Working principle: When using this well completion packer with anti-misalignment structure, the operator first connects the connecting rod to the adjusting rod 2, and places the packer into the well casing through the lowering mechanism on the well casing surface. The electric actuator 35 is then activated synchronously through the controller. The electric actuator 35 drives the adjusting tube 34 to slide downward inside the seat 1. The outer protrusion of the adjusting tube 34 abuts against the tapered tube 33, squeezing the spring and sliding downward. The tapered tube 33 slides down and abuts against the support block 32, squeezing the spring outward in the sliding groove 31 until the outer side of the support block 32 contacts the inner wall of the pipe. As the packer slides along the pipe wall in the lower part of the well casing, it prevents abnormal misalignment of some moving parts on the packer. Based on the above, when the electric actuator 35 is started, the electric actuator 103 is opened simultaneously. The electric actuator 103 drives the adjusting tube 102 to slide downward in the seat 6. The protrusions on the upper and lower outer sides of the adjusting tube 102 abut against the two tapered tubes 101 and compress the springs to slide downward. The two tapered tubes 101 slide down and abut against the cleaning blocks 9 in the rotating sleeve 71 and rotating sleeve 73 respectively. The cleaning blocks 9 in the corresponding grooves compress the springs to slide outward until the scraper on the outer side of the cleaning blocks 9 at the upper and lower positions abuts against the well pipe wall. This completes the adjustment operation of the cleaning block 9 and the support block 32 according to the well pipe diameter. Based on the above, during the lowering of the packer, the controller activates the motor to drive the gear disc 82 to rotate, causing the meshing drive gear disc 81 to rotate synchronously. When the drive gear disc 81 rotates, it drives the double gear 83 to rotate in the same direction through its lower inner teeth. The double gear 83 meshes with the inner side of the rotating sleeve 73 through its lower outer teeth, causing the rotating sleeve 73 and the cleaning block 9 in its groove to rotate synchronously. During this process, when the drive gear disc 81 rotates, it drives the double gear 84 to rotate in the opposite direction through its upper outer teeth. The double gear 84 meshes with the rotating sleeve 71 through its upper outer teeth. The inner meshing drives the rotating sleeve 71 and the cleaning block 9 in its groove to rotate synchronously in opposite directions. This causes the cleaning block 9 in the grooves of the rotating sleeve 71 and the rotating sleeve 73 to fit the sliding tapered tube 101 in the corresponding mounting slots 61 and 63, respectively, and rotate in both directions. The cleaning block 9 fits against the well pipe wall for bidirectional rotation cleaning, preventing the attachments on the pipe wall from contacting the moving parts on the packer and causing abnormal movement and misalignment. At the same time, it prevents the packer from reaching the preset sealing position and causing the rubber sleeve 4 to strongly contact the attachments on the pipe wall during the opening process, resulting in poor sealing or damage to the rubber sleeve 4. Based on the above, after the packer is lowered into the preset sealing position inside the well casing, the motor is turned off and the anti-misalignment mechanism 3 is adjusted to its initial state. Then, the connecting rod drives the adjusting rod 2 to rotate first, causing the limiting sleeve 11 to rotate in the seat body 6, and the limiting pin 12 to slide laterally in the groove of the limiting sleeve 11 to the vertical groove position. During this process, the protrusion on the outer side of the middle section of the adjusting rod 2 rotates synchronously, causing the adjusting seat 5 and the top block 51 to rotate to a misaligned state with the slip block 52. Then, the connecting rod drives the adjusting rod 2 to move downward through the seat body 1 against the rubber sleeve 4 and the adjusting seat 5, so that the outer cone of the adjusting seat 5 slides against the slip block 52, and drives the slip block to move downward. Block 52, within the groove at the top of seat 6, compresses the spring and slides outward, contacting and locking against the pipe wall. At this point, adjusting seat 5 stops moving downward, while seat 1 continues to move downward, compressing and contacting the rubber sleeve 4, causing the rubber sleeve 4 to deform and expand, thus completing the sealing of the well pipe. When the sealing is complete, the limiting sleeve 11 slides down within seat 6, and the limiting post 12 slides in the groove within the limiting sleeve 11 to the lower limit position of the vertical groove. At this point, the protrusion in the middle section of adjusting rod 2 slides down within adjusting seat 5 to the position of the annular groove. In this state, the connecting rod drives adjusting rod 2 to rotate in the opposite direction, causing the limiting post 12 to slide in the groove within the limiting post 12 to the lower limit position of the horizontal groove, thus completing the sealing of the packer within the well pipe.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A well completion packer with an anti-misalignment structure, comprising a base (1), an adjusting rod (2), a limiting sleeve (11), and a limiting column (12), characterized in that: The adjusting rod (2) slides vertically within the corresponding groove on the inner side of the seat body (1) via a protrusion on the outer top. An anti-misalignment mechanism (3) is provided between the inner side of the middle section of the seat body (1) and the adjusting rod (2). The anti-misalignment mechanism (3) is used to prevent the packer from misaligning when sliding inside the well casing. A rubber sleeve (4), an adjusting seat (5), and a seat body (6) are arranged sequentially below the seat body (1). The rubber sleeve (4), the adjusting seat (5), and the seat body (6) are all sleeved on the outer side of the adjusting rod (2). Multiple top blocks (51) are fixed equidistantly on the outer circumferential side of the tapered section below the adjusting seat (5). The lower end of the top block (51) is connected to a slip block (52). Multiple slip blocks (52) The mounting is slidably installed in multiple grooves on the top of the second seat (6) by means of spring limiting. The second seat (6) has a mounting groove 1 (61), a mounting groove 2 (62) and a mounting groove 3 (63) sequentially opened from top to bottom on the outer side of the middle section. A rotating sleeve 1 (71) is rotatably installed in the mounting groove 1 (61), and a rotating sleeve 2 (73) is rotatably installed in the mounting groove 3 (63). A driving component (8) is provided between the mounting groove 2 (62) and the rotating sleeve 1 (71) and the rotating sleeve 2 (73). A cleaning block (9) is slidably connected by means of spring limiting in the groove above the rotating sleeve 1 (71) and the groove below the rotating sleeve 2 (73). An adjustment component (10) is provided between the two cleaning blocks (9).

2. A well completion packer with an anti-misalignment structure according to claim 1, characterized in that: The lower section of the adjusting rod (2) is fixedly connected to a limiting sleeve (11). The limiting sleeve (11) is rotatably and slidably installed in the lower end hole groove of the second seat (6). The outer groove of the limiting sleeve (11) is slidably connected to a limiting post (12). The limiting post (12) is fixed on the lower end hole groove wall of the second seat (6). The length of the transverse rotation section of the outer groove of the limiting sleeve (11) is used for the misalignment and overlap of the gap between the top block (51) and the slip block (52).

3. A well completion packer with an anti-misalignment structure according to claim 2, characterized in that: Two vertical grooves are symmetrically opened on the inner wall of the adjusting seat (5). The vertical grooves in the inner wall of the adjusting seat (5) are used for the vertical sliding of the outer protrusion of the middle section of the adjusting rod (2). An annular groove is opened below the vertical grooves in the inner wall of the adjusting seat (5). The annular groove in the inner wall of the adjusting seat (5) is used for the rotational sliding of the outer protrusion of the middle section of the adjusting rod (2). The length of the vertical groove in the inner wall of the adjusting seat (5) corresponds to the vertical length of the groove on the outer side of the limiting sleeve (11).

4. A well completion packer with an anti-misalignment structure according to claim 1, characterized in that: The anti-misalignment mechanism (3) includes an adjustment tube (34) and multiple sliding grooves (31). The multiple sliding grooves (31) are circumferentially equidistantly opened on the inner side of the middle section of the seat body (1). A support block (32) is slidably connected to the sliding groove (31) by a spring limit. A tapered tube (33) is abutted and connected to the upper protruding inclined surface of the inner side of the multiple support blocks (32). The tapered tube (33) slides vertically in the corresponding groove position on the inner side of the seat body (1) by a spring. The adjustment tube (34) is abutted and connected to the upper end of the tapered tube (33) by a symmetrical protrusion on the outer side. The adjustment tube (34) is slidably sleeved on the outer side of the adjustment rod (2), and the adjustment tube (34) slides vertically in the seat body (1). An electric push rod (35) is connected to the outer side of the upper end of the adjustment tube (34). The electric push rod (35) is fixed in the corresponding groove of the upper section of the seat body (1) by an outer mounting bracket.

5. A well completion packer with an anti-misalignment structure according to claim 1, characterized in that: The drive assembly (8) includes a drive gear disk (81), which is rotatably mounted inside the second mounting slot (62). The lower end of the drive gear disk (81) is symmetrically meshed with a gear disk (82) and a double gear (83). The gear disk (82) is mounted on the circular side wall of the inner cavity of the second mounting slot (62) by a motor. The double gear (83) passes through the bottom of the second mounting slot (62) and is connected to the upper inner tooth of the second rotating sleeve (73) through the lower tooth. The upper end of the drive gear disk (81) is meshed with a double gear (84). The double gear (84) passes through the top of the second mounting slot (62) and is connected to the lower inner tooth of the second rotating sleeve (73) through the upper tooth. The drive assembly (8) is used to make the first rotating sleeve (71) and the second rotating sleeve (73) rotate in opposite directions.

6. A well completion packer with an anti-misalignment structure according to claim 4, characterized in that: The adjustment assembly (10) includes two conical tubes (101). The upper conical tube (101) slides against the cleaning block (9) inside the rotating sleeve (71) through its outer inclined surface. The lower conical tube (101) slides against the cleaning block (9) inside the rotating sleeve (73) through its outer inclined surface. The upper conical tube (101) is vertically slidably sleeved on the circular side wall of the inner cavity of the mounting groove (61) by a spring. The lower conical tube (101) is vertically slidably sleeved on the circular side wall of the inner cavity of the mounting groove (62) by a spring. The outer conical inclined surfaces of the two conical tubes (101) correspond to the outer conical inclined surfaces of the two conical tubes (33). The upper inclined surfaces of the two cleaning blocks (9) correspond to the outer conical inclined surfaces of the two conical tubes (101). One end of the cleaning block (9) is designed with a triangular scraper.

7. A well completion packer with an anti-misalignment structure according to claim 1, characterized in that: The adjustment assembly (10) also includes an adjustment tube two (102). The adjustment tube two (102) is connected to the upper ends of two tapered tubes two (101) by symmetrical protrusions on the upper and lower outer sides through the mounting groove one (61) and the mounting groove two (62). The adjustment tube two (102) is slidably sleeved on the outside of the adjustment rod (2) and slides vertically in the seat body two (6). The upper outer side of the adjustment tube two (102) is connected to an electric push rod two (103). The electric push rod two (103) is fixed in the corresponding groove on the upper section of the seat body two (6) by the outer mounting bracket.

8. A method of using a well completion packer with an anti-dislocation structure, applicable to the well completion packer with an anti-dislocation structure as described in claims 1-7, characterized in that, The method includes the following steps: S1: Connect the connecting rod to the adjusting rod (2), put the well pipe in through the ground lowering mechanism, turn on the electric push rod (35) of the controller, drive the adjusting pipe (34) and the cone pipe (33) to slide down, push the support block (32) to slide outward along the slide groove (31) until it contacts the inner wall of the well pipe to achieve anti-misalignment; S2: When electric push rod one (35) is started, electric push rod two (103) is opened simultaneously, which drives the adjustment tube two (102) to slide down. Its upper and lower protrusions abut against the cone tube two (101), pushing the cleaning block (9) inside the rotating sleeve one (71) and rotating sleeve two (73) to slide outward until it abuts against the tube wall, thus completing the adaptive adjustment; S3: When the packer is lowered, the controller starts the motor to drive the gear disk one (82), which drives the drive gear disk (81) to rotate. Through the transmission of double gear one (83) and double gear two (84), the rotating sleeve one (71), rotating sleeve two (73) and cleaning block (9) rotate in both directions to complete the pipe wall cleaning. S4: After the packer is lowered to the preset position, rotate the adjusting rod (2) to make the limiting post (12) slide to the vertical groove, and drive the adjusting seat (5) and the slip block (52) to be misaligned. Then move the seat body one (1) down to squeeze the rubber cylinder (4) and push the slip block (52) to clamp, thus completing the clamping of the slip block (52) and the pipe wall, as well as the sealing of the pipe wall by the deformation of the rubber cylinder (4). Rotate the adjusting rod (2) in the opposite direction to limit the position and complete the sealing.

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