An apparatus and method for assembling a rubber sleeve on a packer body of a bare hole packer

Abstract

The application discloses a device and method for assembling a rubber sleeve on a packer body of a bare hole packer, and belongs to the technical field of packers, which comprises a rotating rod, a guide rod, an assembling rod and a plurality of assembling components; the assembling component comprises an assembling ring, an extending strip, a supporting arc plate, an elastic reset member and a downward moving block; through driving the rotation of the assembling ring, the assembling ring moves spirally along the thread to the direction of the packer body, the extending strip moves and makes the supporting arc plate support the rubber sleeve, then the rubber sleeve is pushed to the outer surface of the packer body along the guide rod step by step, a bottom-up, orderly and controlled sleeving process is realized, the coupling of the radial support and the axial advancement is used to ensure that the assembling force and displacement are transmitted in a controllable path; the automatic and controllable assembling process is realized by using the mechanical thread guide and the multi-stage support, the traditional manual forced pushing and pulling or knocking is replaced, and the manual labor intensity is significantly reduced.

Description

Technical Field

[0001] This invention relates to the field of packer technology, and more specifically to an apparatus and method for mounting a rubber sleeve on the packer body of a naked-eye packer. Background Technology

[0002] An open-hole packer is a downhole tool commonly used in oil and gas well operations such as stratified production testing, stratified fracturing, and temporary plugging. Its main function is to form a seal between the wellbore and the packer body through a rubber sleeve, thereby achieving stratified isolation of the wellbore. The rubber sleeve is usually fitted onto the outer surface of the packer body and fixed by fastening rings, pressure rings, or limiting components, enabling it to withstand high pressure, high temperature, and complex downhole environments during operation.

[0003] In existing technologies, the assembly of the rubber sleeve mainly relies on manual labor. Specifically, operators typically manually insert the rubber sleeve into the designated position on the packer body, and then push, adjust, and secure it manually or with simple tools. Because the rubber sleeve is mostly made of highly elastic rubber or composite elastomers, there is a large interference fit between its inner diameter and the outer diameter of the packer body, resulting in significant assembly resistance. Furthermore, the rubber sleeve is prone to localized deformation or twisting during assembly. This manual assembly method suffers from drawbacks such as high labor intensity, low efficiency, unstable assembly quality, safety hazards, and unsuitability for mass production. Summary of the Invention

[0004] The purpose of this invention is to provide an apparatus and method for assembling a rubber sleeve on the packer body of a naked-eye packer, which solves the problems of high labor intensity, low efficiency, unstable assembly quality, safety hazards, and unsuitability for mass production in the prior art of assembling rubber sleeves manually.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A first aspect of the present invention is to provide an apparatus for mounting a rubber sleeve on the packer body of a naked-eye packer, comprising:

[0007] The rotating rod is used for coaxial rotational connection with the packer body;

[0008] A guide rod, one end of which is coaxially fixed to the rotating rod, and the other end of which has a receiving groove; the diameter of the guide rod is larger than that of the packer body, and is used to guide the rubber tube to transition smoothly;

[0009] An assembly rod is provided at one end in the receiving groove and is coaxial with the guide rod; the circumferential side of the assembly rod is provided with a threaded surface;

[0010] Multiple assembly components are threaded onto the assembly rod and are used to open the rubber sleeve;

[0011] The assembly components move along the threaded surface towards the packer body under rotational drive and expand the rubber tube, and gradually push the rubber tube along the guide rod to the outer surface of the packer body to achieve assembly.

[0012] A further technical solution is that each of the plurality of assembly components includes an assembly ring, an extension strip, and a support arc plate;

[0013] The assembly ring is threaded onto the threaded surface, and multiple protruding grooves are evenly arranged radially on its circumference.

[0014] The protruding strips are evenly distributed around the periphery of the assembly ring and are slidably connected to the protruding groove, and can reciprocate along the radial direction of the assembly ring;

[0015] The supporting arc plate is coaxially disposed on the periphery of the assembly ring, and its inner end is fixedly connected to the end of the protruding strip away from the assembly ring, for supporting and expanding the rubber tube.

[0016] In this assembly, all of the supporting arc plates in the plurality of assembly components are used to jointly open the rubber tube.

[0017] A further technical solution is that the assembly assembly also includes an elastic reset component, a downward moving block, and a driving component;

[0018] The end face of the assembly ring has a downward groove that communicates with the protruding groove along the vertical direction;

[0019] The lowering block is vertically reciprocatingly slidable within the lowering groove and has a first wedge-shaped surface; the protruding strip has a second wedge-shaped surface at one end of the protruding groove;

[0020] The elastic reset member is radially disposed in the protruding groove, and one end is connected to the protruding strip to provide a rebound force;

[0021] The driving component is used to drive the lowering block to reciprocate vertically. The lowering block contacts and engages with the second wedge surface through the first wedge surface, thereby driving the protruding strip to move outward and realizing the radial opening of the supporting arc plate.

[0022] A further technical solution is that a through groove is formed on the first wedge-shaped surface of the lowering block; the elastic reset member is located within the through groove.

[0023] A further technical solution is that the driving component includes a driving block, a screw, a frame, and a driving motor;

[0024] The assembly ring has a drive groove that communicates with the downward movement groove;

[0025] The frame is mounted on the assembly ring and is located directly above the drive groove;

[0026] One end of the screw is rotatably mounted vertically within the drive groove;

[0027] The drive motor is mounted on the frame, and its power end rotates vertically through the frame and is coaxially fixed to the other end of the screw.

[0028] A further technical solution is that multiple annular grooves are formed on the circumference of the guide rod along the axial direction; a guide ring is coaxially rotatably arranged in each annular groove to support and guide the rubber cylinder during assembly.

[0029] A further technical solution is that the guide ring is provided with several rotatable universal balls on its circumference.

[0030] Another aspect of the present invention is to provide a method of using an apparatus for mounting a rubber sleeve on the packer body of a naked-eye packer, comprising the following steps:

[0031] S1. Device connection and pre-installation preparation;

[0032] Insert the lower end of the rotating rod into the opening of the packer body, so that it forms a rotatable fit with the inner wall of the packer body to ensure that the assembly axis is coaxial and can rotate freely; then thread multiple assembly rings onto the threaded surface of the assembly rod in sequence to complete the pre-assembly of the device.

[0033] S2. Pre-positioning and positioning of the rubber sleeve;

[0034] The rubber sleeves to be assembled are sequentially placed on the outside of each of the assembly rings, so that the supporting arc plates in the multiple assembly components are all inside the rubber sleeves, and the rubber sleeves are kept in a relaxed state. At this time, the guide rod at the front end of the assembly rod is located inside the front end of the rubber sleeve, ensuring that the rubber sleeve and the surface of the guide rod are in close contact, so as to facilitate subsequent guiding assembly.

[0035] S3, the supporting arc plate is opened synchronously;

[0036] The drive motor is started, which drives the screw to rotate, thereby pushing the drive block to move the lower block vertically downward; under the action of the first wedge surface and the second wedge surface, the protruding strip overcomes the elastic force of the elastic reset member and extends outward, thereby driving the support arc plate to expand radially outward; the support arc plates in the multiple assembly components simultaneously expand outward to jointly support and tension the inner wall of the rubber cylinder, so that the rubber cylinder forms a pre-expanded diameter state;

[0037] S4, Rotary propulsion rubber cylinder;

[0038] The operator slowly rotates the rubber tube, causing it to move downwards along the thread direction under the guidance of the threaded surface of the assembly ring. As the rotation continues, the rubber tube, supported by the outer wall of the guide rod, gradually moves from bottom to top through the end of the guide rod and towards the packer body. The guide ring on the outer side of the guide rod and the circumferentially arranged universal ball provide rolling support during this process, significantly reducing the frictional resistance between the rubber tube and the guide rod, and ensuring that the rubber tube smoothly transitions to the surface of the packer body.

[0039] S5. Release the assembly rings sequentially;

[0040] As the lower end of the rubber tube gradually enters the outer wall of the packer body and begins to fit tightly, the operator can gradually stop the spiral downward movement of part of the assembly ring according to the position of the rubber tube. At this time, by controlling the drive motor to reverse, the downward block moves upward. Under the action of the first wedge surface and the second wedge surface disengaging, the protruding strip retracts inward under the action of the elastic reset member, driving the support arc plate to retract. The support arc plate of the lower assembly ring retracts into the receiving groove in sequence, leaving space for the upper assembly ring to continue guiding the rubber tube downward.

[0041] S6. Complete assembly and reset;

[0042] After the rubber tube is fully assembled onto the packer body, the drive motor is turned off, causing all the lowering blocks to return to their initial positions and the support arc plates to retract completely. At this time, the operator pulls out the rotating rod to check the adhesion of the rubber tube and make corrections.

[0043] Compared with the prior art, the beneficial effects of the present invention are:

[0044] By driving the rotation of the assembly ring, the assembly ring moves spirally along the thread towards the packer body, the extension bar moves and causes the support arc plate to open the rubber tube, and then the rubber tube is pushed step by step along the guide rod to the outer surface of the packer body, realizing a bottom-up, orderly and controlled assembly process. By coupling radial opening and axial propulsion, the assembly force and displacement are ensured to be transmitted within a controllable path. The mechanical thread guide and multi-stage opening realize an automatic and controllable assembly process, replacing the traditional manual forceful pushing, pulling or knocking, significantly reducing the intensity of manual labor. Through threaded feed and staged support, the rubber tube is ensured to be subjected to uniform force and controlled deformation when passing through the guide section, reducing permanent deformation caused by scratches, twisting or local overstretching of the rubber tube surface, improving assembly consistency and first-time success rate. Attached Figure Description

[0045] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0046] Figure 1This is a three-dimensional diagram of the device of the present invention in its initial state.

[0047] Figure 2 This is a three-dimensional diagram showing the working state of the assembly components of the device of the present invention.

[0048] Figure 3 A three-dimensional view of the assembly components of the device of the present invention with the rubber tube extended.

[0049] Figure 4 This is a three-dimensional view of the assembly components of the present invention.

[0050] Figure 5 This is a longitudinal sectional view of the assembly component of the present invention.

[0051] Figure 6 This is a three-dimensional view of a partial structure of the assembly component of the present invention.

[0052] Figure 7 This is a three-dimensional view of the assembly components located in the receiving groove after the device of the present invention is assembled.

[0053] Icons: 1-Rotating rod, 2-Guide rod, 3-Assembly rod, 4-Assembly component, 5-Receiving groove, 6-Assembly ring, 7-Extending strip, 8-Supporting arc plate, 9-Elastic reset component, 10-Lowering block, 11-Lowering groove, 12-Drive block, 13-Screw, 14-Frame, 15-Drive motor, 16-Guide ring, 17-Universal ball, 18-Packard body, 19-Glue sleeve, 20-Through groove. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0055] Example:

[0056] like Figures 1-7As shown, this invention provides a device for assembling a rubber sleeve on the packer body of a naked-eye packer, including a rotating rod 1, a guide rod 2, an assembly rod 3, and multiple assembly components 4 (this embodiment uses three assembly components 4 as an example for description); the lower end of the rotating rod 1 is inserted into the opening of the packer body 18, and the rotating rod 1 is coaxially rotatably connected to the packer body 18; the lower end of the guide rod 2 is coaxially fixed to the rotating rod 1, and the upper end of the guide rod 2 has a receiving groove 5; the diameter of the guide rod 2 is larger than that of the packer body 18, used to guide the rubber sleeve 19 to transition smoothly; the bottom side of the receiving groove 5 has a threaded groove; the lower end of the assembly rod 3 is located on... The assembly rod 3 is located within the receiving groove 5 and is coaxial with the guide rod 2. The circumferential side of the assembly rod 3 is provided with a threaded surface. The assembly rod 3 is threadedly connected to the threaded groove through the threaded surface, realizing the detachable connection between the assembly rod 3 and the guide rod 2. Multiple assembly components 4 are threadedly sleeved on the assembly rod 3 and are used to open the rubber cylinder 19 together or individually, so as to realize the sequential installation of multiple rubber cylinders 19 or the joint assembly of a rubber cylinder 19. Under the rotation drive, the multiple assembly components 4 move along the threaded surface towards the packer body 18 and open the rubber cylinder 19, and gradually push the rubber cylinder 19 along the guide rod 2 to the outer surface of the packer body 18 to realize the assembly.

[0057] The principles and beneficial effects of the above technical solution:

[0058] This device, driven by the operator, rotates the assembly ring 6, causing it to spiral along the thread towards the packer body 18. Multiple assembly rings 6 expand the rubber sleeve 19 and push it step by step along the guide rod 2 towards the outer surface of the packer body 18, achieving an orderly and controlled assembly process from bottom to top. By coupling radial expansion with axial propulsion, the assembly force and displacement are ensured to be transmitted within a controllable path. The mechanical thread guide and multi-stage expansion achieve an automatic and controllable assembly process, replacing the traditional manual forceful pushing, pulling, or hammering, significantly reducing the intensity of manual labor. Through threaded feed and graded support of the assembly components 4, the rubber sleeve 19 is ensured to be subjected to uniform force and controlled deformation when passing through the guide section, reducing permanent deformation caused by scratches, twisting, or local overstretching on the surface of the rubber sleeve 19, improving assembly consistency and first-time success rate.

[0059] In this embodiment, each of the multiple assembly components 4 includes an assembly ring 6, an extension bar 7, and a support arc plate 8. The assembly ring 6 is threaded onto the threaded surface and has multiple radially arranged extension grooves evenly distributed around its periphery. The extension bar 7 is evenly distributed around the periphery of the assembly ring 6 and is slidably connected within the extension grooves, and can reciprocate along the radial direction of the assembly ring 6. The support arc plate 8 is coaxially disposed around the periphery of the assembly ring 6, and its inner end is fixedly connected to the end of the extension bar 7 away from the assembly ring 6, for supporting and expanding the rubber tube 19. All the support arc plates 8 in each assembly component 4 are used to jointly expand the rubber tube 19.

[0060] The principles and beneficial effects of the above technical solution:

[0061] Each assembly component 4 uses the assembly ring 6 as a base. When the assembly ring 6 moves along the thread of the assembly rod 3, the protruding groove on the assembly ring 6 guides the protruding strip 7 to slide radially. One end of the protruding strip 7 is fixed to the support arc plate 8. When the assembly ring 6 spirals downward, the support arc plate 8 is pushed outward synchronously through the protruding strip 7, so that multiple support arc plates 8 form a concentric support surface on the ring, thereby evenly expanding the inner wall of the rubber sleeve 19 and forming a stable outer diameter support ring. The support arc plates 8 in multiple assembly components 4 are arranged axially at the same time to ensure continuous guidance from bottom to top.

[0062] Multiple assembly components 4 work together to distribute the spreading force to multiple independent support surfaces, avoiding high stress concentration at a single point and reducing the risk of local stress and scratches on the material of the rubber sleeve 19; the sliding cooperation between the extension bar 7 and the extension groove improves the repeatability of the structure, making the spreading amplitude of each level controllable and replicable, facilitating standardized assembly processes and reducing reliance on personnel experience.

[0063] In this embodiment, the assembly assembly 4 further includes an elastic reset member 9, a lowering block 10, and a driving member; the end face of the assembly ring 6 has a lowering groove 11 that communicates with the extension groove along the vertical direction; the lowering block 10 is slidably disposed in the lowering groove 11 along the vertical direction and has a first wedge-shaped surface; the extension bar 7 has a second wedge-shaped surface at one end of the extension groove; the elastic reset member 9 is disposed radially in the extension groove and one end is connected to the extension bar 7 to provide a rebound force; the elastic reset member 9 is a tension spring; the driving member is used to drive the lowering block 10 to move vertically reciprocally, and the lowering block 10 contacts and engages with the second wedge-shaped surface through the first wedge-shaped surface, thereby driving the extension bar 7 to move outward and realizing the radial opening of the supporting arc plate 8.

[0064] The principles and beneficial effects of the above technical solution:

[0065] By cooperating with the first and second wedge surfaces, the vertical displacement of the lowering block 10 is converted into the radial displacement of the extension bar 7, thereby overcoming the elastic reset member 9 and pushing the support arc plate 8 to the outside; when the lowering block 10 moves back to its original position, the elastic reset member 9 causes the extension bar 7 to automatically retract inward. The driving component adopts a screw 13, a drive motor 15, and a drive block 12 mechanism to achieve precise displacement control.

[0066] The wedge-shaped fit between the lowering block 10 and the extending bar 7 achieves a mechanical amplification effect of small displacement and large radial push, enabling sufficient radial opening force to be obtained with a small driving force, thus reducing the motor power requirement; the elastic reset component 9 ensures that the support component can reliably retract when the drive stops or malfunctions, preventing jamming and facilitating reset and disassembly; the whole achieves controllable opening and closing action, which is convenient for automated control and fault protection, replacing the crude method of relying solely on mechanical springs or manual opening.

[0067] In this embodiment, a through groove 20 is formed on the first wedge-shaped surface of the lowering block 10; the elastic reset member 9 is located in the through groove 20.

[0068] The principles and beneficial effects of the above technical solution:

[0069] A through groove 20 is opened on the first wedge-shaped surface of the lowering block 10 to accommodate the elastic reset member 9, so that the elastic reset member 9 partially passes through the through groove 20, thereby preventing the lowering block 10 from interfering with the elastic reset member 9 and affecting the radial displacement of the protruding strip 7.

[0070] In this embodiment, the driving component includes a driving block 12, a screw 13, a frame 14, and a driving motor 15; the assembly ring 6 has a driving groove communicating with the lower moving groove 11; the frame 14 is disposed on the assembly ring 6 and is located directly above the driving groove; one end of the screw 13 is rotatably disposed in the driving groove along the vertical direction; the driving motor 15 is disposed on the frame 14, and its power end rotatably passes through the frame 14 along the vertical direction and is coaxially fixed with the other end of the screw 13; the driving motor 15 is a servo motor.

[0071] The principles and beneficial effects of the above technical solution:

[0072] Using a servo motor drive enables high-precision motion control, facilitating the implementation of assembly sequences, misalignment self-checks, and fault shutdown logic in the software. Compared to manual and simple pneumatic systems, servo control improves assembly consistency and repeatability, and facilitates integration with external host computers or PLCs to achieve synchronous support of the inner walls of the support arc plate 8 and the rubber cylinder 19.

[0073] In this embodiment, multiple annular grooves are formed on the periphery of the guide rod 2 along the axial direction; a guide ring 16 is coaxially rotatably arranged in each annular groove to support and guide the rubber tube 19 for assembly.

[0074] The principles and beneficial effects of the above technical solution:

[0075] As the rubber sleeve 19 is pushed along the guide rod 2, the wall of the rubber sleeve 19 contacts the guide ring 16 and is guided to slide through the guide section. The multi-stage guide ring 16 transforms large-area sliding friction into multi-point rolling or low-friction sliding, significantly reducing pushing resistance, reducing operating torque, and lessening the mechanical requirements on the operator; the guide ring 16 shares the contact stress, reduces surface wear of the rubber sleeve 19, and improves assembly smoothness, making it particularly suitable for rubber sleeves 19 made of high-friction coefficient or flexible materials.

[0076] In this embodiment, the guide ring 16 is provided with a plurality of rotatable universal balls 17 on its periphery.

[0077] The principles and beneficial effects of the above technical solution:

[0078] The introduction of the omnidirectional ball 17 further reduces frictional resistance and sticking. Especially when the material of the rubber sleeve 19 is uneven or the assembly angle has slight deviation, it can adaptively adjust the contact surface to avoid scratches or extrusion marks, improve the assembly experience and increase the assembly success rate. At the same time, for the operator, the rotational propulsion torque is significantly reduced, which is beneficial for semi-automatic or manual / electric hybrid operation.

[0079] Another object of the present invention is to provide a method of using an apparatus for mounting a rubber sleeve 19 on the packer body 18 of a naked-eye packer, comprising the following steps:

[0080] S1. Device connection and pre-installation preparation;

[0081] Insert the lower end of the rotating rod 1 into the opening of the packer body 18 so that it forms a rotatable fit with the inner wall of the packer body to ensure that the assembly axis is coaxial and can rotate freely; then thread multiple assembly rings 6 onto the threaded surface of the assembly rod 3 in sequence to complete the pre-assembly of the device.

[0082] S2, Pre-positioning and positioning of rubber sleeve 19;

[0083] The rubber cylinder 19 to be assembled is sequentially placed on the outside of each assembly ring 6, so that the support arc plate 8 in the multiple assembly components 4 are all inside the rubber cylinder 19, and the rubber cylinder 19 is kept in a relaxed state. At this time, the guide rod 2 at the front end of the assembly rod 3 is located inside the front end of the rubber cylinder 19, ensuring that the rubber cylinder 19 and the surface of the guide rod 2 are in close contact, so as to facilitate subsequent guiding assembly.

[0084] S3, the supporting arc plate 8 is opened synchronously;

[0085] Start the drive motor 15, which drives the screw 13 to rotate, thereby pushing the drive block 12 to move the lowering block 10 vertically downward; under the action of the first wedge surface and the second wedge surface, the extension bar 7 overcomes the elastic force of the elastic reset member 9 and extends outward, thereby driving the support arc plate 8 to expand radially outward; the support arc plates 8 in the multiple assembly components 4 simultaneously expand outward to jointly support and tension the inner wall of the rubber cylinder 19, so that the rubber cylinder 19 forms a pre-expanded diameter state;

[0086] S4, Rotary propulsion rubber cylinder 19;

[0087] The operator slowly rotates the rubber cylinder 19, causing it to move downward along the thread direction under the guidance of the threaded surface of the assembly ring 6. As the rotation continues, the rubber cylinder 19 is gradually pushed from bottom to top through the end of the guide rod 2 and toward the packer body 18 under the support of the outer wall of the guide rod 2. The guide ring 16 on the outer side of the guide rod 2 and its circumferentially arranged universal ball 17 provide rolling support during this process, significantly reducing the frictional resistance between the rubber cylinder 19 and the guide rod 2, and ensuring that the rubber cylinder 19 smoothly transitions to the surface of the packer body 18.

[0088] S5. Release assembly rings 6 sequentially;

[0089] As the lower end of the glue cylinder 19 gradually enters the outer wall of the packer body 18 and begins to fit tightly, the operator can gradually stop the spiral downward movement of part of the assembly ring 6 according to the position of the glue cylinder 19. At this time, by controlling the drive motor 15 to reverse, the downward block 10 moves upward. Under the action of the first wedge surface and the second wedge surface disengaging, the extension bar 7 retracts inward under the action of the elastic reset member 9, driving the support arc plate 8 to retract. The support arc plate 8 of the lower assembly ring 6 retracts into the receiving groove 5 in sequence, leaving space for the upper assembly ring 6 to continue guiding the glue cylinder 19 downward.

[0090] S6. Complete assembly and reset;

[0091] After the glue tube 19 is fully assembled onto the packer body 18, turn off the drive motor 15 to return all the lowering blocks 10 to their initial positions and retract all the support arc plates 8. At this time, the operator pulls out the rotating rod 1 to check the fit of the glue tube 19 and make corrections.

[0092] Through the above assembly steps, the packer sleeve 19 can achieve smooth transition and automatic guided assembly under the spiral guidance of the assembly rod 3 and the linkage support of multiple assembly components 4, avoiding the surface damage and assembly deviation problems caused by traditional manual hammering and forced pushing. With the combination of the guide ring 16 and the universal ball 17 structure, the frictional resistance can be effectively reduced, making the assembly of the packer sleeve 19 smoother. At the same time, the automatic control of opening and releasing can be realized through the drive mechanism, which greatly reduces the intensity of manual labor and improves the accuracy and efficiency of packer sleeve 19 assembly.

[0093] Although the invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter arrangement within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. An apparatus for assembling a rubber sleeve on a packer body of a barehole packer, characterized by, The device comprises: a rotating rod coaxially connected with the packer body; a guide rod coaxially fixed at one end of the rotating rod and having a receiving groove at the other end; the diameter of the guide rod is greater than that of the packer body, and the guide rod is used to guide the smooth transition of the rubber sleeve; an assembly rod arranged in the receiving groove and coaxial with the guide rod; the assembly rod is provided with a threaded surface on the lateral side thereof; a plurality of assembly components threadedly arranged on the assembly rod and used to expand the rubber sleeve; wherein the assembly components are driven to move along the threaded surface in the direction of the packer body and expand the rubber sleeve, and the rubber sleeve is gradually pushed along the guide rod to the outer surface of the packer body to achieve assembly; each of the assembly components comprises an assembly ring, an extension strip and a support arc plate; the assembly ring is threadedly connected to the threaded surface and uniformly provided with a plurality of radial extension grooves on the lateral side thereof; the extension strip is uniformly arranged on the lateral side of the assembly ring and slidably connected to the extension grooves and reciprocally slidable along the radial direction of the assembly ring; the support arc plate is coaxially arranged on the lateral side of the assembly ring, and the inner end thereof is fixedly connected to the end of the extension strip away from the assembly ring, and is used to support and expand the rubber sleeve; all the support arc plates of the assembly components are used to jointly expand the rubber sleeve; the assembly component further comprises an elastic reset member, a downward moving block and a driving member; the end surface of the assembly ring is vertically provided with a downward moving groove in communication with the extension grooves; the downward moving block is vertically reciprocally arranged in the downward moving groove and has a first wedge surface; one end of the extension strip is provided with a second wedge surface; the elastic reset member is arranged in the extension groove in the radial direction, and one end thereof is connected to the extension strip, and is used to provide a resilient force; the driving member is used to drive the downward moving block to vertically reciprocate, and the first wedge surface of the downward moving block is in contact with the second wedge surface, thereby driving the extension strip to move outward and realize radial expansion of the support arc plate; the first wedge surface of the downward moving block is provided with a through groove; and the elastic reset member is arranged in the through groove.

2. The device according to claim 1, wherein: the driving member comprises a driving block, a screw rod, a frame and a driving motor; the assembly ring is provided with a driving groove in communication with the downward moving groove; the frame is arranged on the assembly ring and vertically above the driving groove; one end of the screw rod is vertically rotatably arranged in the driving groove; the driving motor is arranged on the frame, and the power end thereof is vertically rotatably arranged through the frame and coaxially fixed to the other end of the screw rod.

3. The device according to claim 2, wherein: the lateral side of the guide rod is provided with a plurality of annular grooves in the axial direction; each of the annular grooves is coaxially rotatably provided with a guide ring, and is used to support and guide the rubber sleeve for assembly.

4. The device according to claim 3, wherein: The circumferential side of the guide ring is provided with a plurality of rotationally arranged universal balls.

5. A method of using the apparatus for assembling a rubber sleeve on a packer body of a barehole packer according to claim 4, characterized in that: The method comprises the following steps: S1, device connection and pre-assembly preparation; The lower end of the rotating rod is inserted into the pipe orifice of the packer body, and is rotatably matched with the inner wall of the pipe of the packer body, so as to ensure that the assembly axis is coaxial and can rotate freely; then a plurality of assembly rings are sequentially threaded on the threaded surface of the assembly rod, and the pre-assembly of the device is completed; S2, rubber tube prepositioning and positioning; The rubber tube to be assembled is sequentially sleeved outside each assembly ring, so that the support arc plates in the plurality of assembly components are all inside the rubber tube, and the whole rubber tube is kept in a relaxed state; at this time, the guide rod at the front end of the assembly rod is located inside the front end of the rubber tube, ensuring that the rubber tube is closely attached to the surface of the guide rod, so as to facilitate subsequent guided assembly; S3, synchronous opening of the support arc plates; The driving motor is started, the driving motor drives the screw rod to rotate, thereby driving the driving block to drive the downward moving block to move downward along the vertical direction; under the action of the first wedge surface and the second wedge surface, the extension strip overcomes the elastic force of the elastic return member and extends outward, thereby driving the support arc plates to expand radially outward; the support arc plates in the plurality of assembly components are simultaneously expanded outward to jointly support and tension the inner wall of the rubber tube, so that the rubber tube forms a pre-diameter expansion state; S4, rotating and advancing the rubber tube; The operator slowly rotates the rubber tube, so that the rubber tube moves downward along the threaded direction under the guidance of the threaded surface of the assembly ring; as the rotation proceeds, the rubber tube gradually passes through the end of the guide rod from bottom to top under the support of the outer wall of the guide rod and advances to the direction of the packer body; the guide ring on the outer side of the guide rod and the universal balls arranged circumferentially thereof provide rolling support in this process, significantly reducing the frictional resistance between the rubber tube and the guide rod, and ensuring that the rubber tube smoothly transitions to the surface of the packer body; S5, sequentially releasing the assembly rings; When the lower end of the rubber tube gradually enters the outer wall of the packer body and begins to closely attach, the operator can gradually stop the screw downward movement of part of the assembly rings according to the position of the rubber tube; at this time, by controlling the driving motor to reverse, the downward moving block moves upward, and under the action of the first wedge surface and the second wedge surface, the extension strip is retracted inward under the action of the elastic return member, driving the support arc plates to retract; The support arc plates of the assembly rings below are sequentially retracted into the accommodating grooves, leaving space for the assembly rings above to continue guiding the downward movement of the rubber tube; S6, complete assembly and reset; When the rubber tube is completely assembled on the packer body, the driving motor is turned off, and all the downward moving blocks return to the initial position, and the support arc plates are all retracted; at this time, the operator pulls out the rotating rod, checks the attachment state of the rubber tube and corrects it.

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