Mechanical setting hollow bridge plug through cable
By designing a mechanically set hollow bridge plug and utilizing the cooperation of the central tube and guide pin, a simplified setting and unsetting operation is achieved, solving the problems of complex operation and high cost of traditional bridge plug tools, and improving the reliability of the bridge plug and its compatibility with other downhole tools.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DAQING JINXIANGYU SCI & TECH CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional bridge plug tools are complex and costly to operate in the cable control test of stratified oil production in mechanical wells, and have shortcomings in cable compatibility, setting and unsetting methods.
A mechanically set hollow bridge plug for cable passage was designed, employing a structure including a central tube, guide cup, guide head, connector, connecting assembly, rubber sleeve assembly, anchoring assembly, and guide pin. Setting and unsetting are achieved without pressure difference between the inside and outside of the tube string through lifting and lowering operations, simplifying the operation process. Anchoring is achieved through the cooperation of the reversing slide assembly and guide pin.
It enables a simple setting and unsealing process, avoids damage to the rubber sleeve due to tubing creep, improves pressure resistance and service life, reduces mining costs, and enhances compatibility with other downhole tools.
Smart Images
Figure CN224532689U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bridge plug technology used in oil extraction, and in particular relates to a mechanically set hollow bridge plug for cable transmission. Background Technology
[0002] In the testing of cable control during stratified oil production in mechanically operated wells, an effective bridge plug tool is needed. Traditional bridge plugs often require specialized setting tools, which are complex to operate and costly, and have shortcomings in terms of cable compatibility, setting and unsetting methods. Utility Model Content
[0003] In view of this, in order to solve the above problems, this utility model proposes a mechanically set hollow bridge plug for cable passage.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: A mechanically set hollow bridge plug for cable connection includes: a central tube, an upper guide cup, a lower guide cup, an upper guide head, a lower guide head, an upper connector, a lower connector, an upper connecting assembly, a lower connecting assembly, a rubber sleeve assembly, a release head, an anchoring assembly, a guide pin, a moving ring, and a clamping ring. One end of the central tube is sequentially provided with the upper guide cup, the upper guide head, and the upper connector, while the other end is sequentially provided with the lower guide cup, the lower guide head, and the lower connector. The upper connecting assembly is used to connect the cable to the upper guide head, and the lower connecting assembly is used to connect the cable to the lower guide head. From the upper connector downwards… In the joint direction, the rubber sleeve assembly, release head, anchoring assembly, and clamp ring are sequentially fitted onto the central tube. The anchoring assembly includes a slip, a centralizing body, a support ring, and a friction block. The slip and friction block are connected to the support ring through the centralizing body. The support ring is fitted onto the central tube. The release head is conical, with its small-diameter end facing the slip. The friction block is screwed onto the clamp ring. A floating ring is positioned between the central tube and the clamp ring. The central tube is equipped with a reversing slide rail assembly. A guide pin passes through the floating ring, with one end of the guide pin abutting against the clamp ring and the other end sliding through the reversing slide rail assembly.
[0005] As a preferred embodiment of the aforementioned mechanically set hollow bridge plug for cable passage, the reversing slide group includes multiple long slides and multiple short slides, which are alternately distributed along the circumference of the central tube. Each long slide and each section slide has a guide slide at its outlet, and the guide slide connects adjacent long slides and short slides.
[0006] As a preferred embodiment of the aforementioned mechanically set hollow bridge plug for cable passage, the upper connecting assembly includes an upper cable sealing cap and an upper cable sealing elastic washer. The upper cable sealing cap is screwed to the upper guide head, and the two ends of the upper cable sealing elastic washer abut against the upper guide head and the upper cable sealing cap, respectively. The cable passes through the upper cable sealing cap and the upper cable sealing elastic washer.
[0007] As a preferred embodiment of the aforementioned mechanically set hollow bridge plug for cable passage, the lower connecting assembly includes a lower cable sealing cap and a lower cable sealing elastic washer. The lower cable sealing cap is screwed to the lower guide head, and the two ends of the lower cable sealing elastic washer abut against the lower guide head and the lower cable sealing cap, respectively. The cable passes through the lower cable sealing cap and the lower cable sealing elastic washer.
[0008] As a preferred embodiment of the aforementioned mechanically set hollow bridge plug for cable transmission, the rubber sleeve assembly includes an upper rubber sleeve, a first barrier ring, a middle rubber sleeve, a second barrier ring, and a lower rubber sleeve, which are sequentially fitted onto the central tube.
[0009] As a preferred embodiment of the aforementioned mechanically set hollow bridge plug for cable passage, the centering body includes a limiting ring, a small hoop ring, and a large hoop ring. The limiting ring, the small hoop ring, and the large hoop ring are welded together. The inner ring of the limiting ring is connected to the support ring, and the outer ring of the limiting ring is connected to the large hoop ring. The limiting ring is located between the slip and the friction block. Both the slip and the friction block abut against the inner ring of the large hoop ring. A slip spring is provided between the slip and the small hoop ring, and a closing spring is provided between the slip and the support ring.
[0010] As a preferred embodiment of the aforementioned mechanically set hollow bridge plug for cable transmission, a plurality of support springs are provided between the friction block and the support ring.
[0011] As a preferred embodiment of the aforementioned mechanically set hollow bridge plug for cable transmission, the outer wall of the slip is provided with anti-slip teeth.
[0012] As a preferred embodiment of the aforementioned mechanically set hollow bridge plug for cable passage, the mechanically set hollow bridge plug for cable passage further includes a setting pin, which connects the release head and the central tube.
[0013] As a preferred embodiment of the aforementioned mechanically set hollow bridge plug for cable passage, the mechanically set hollow bridge plug for cable passage further includes a limiting pin, which connects to a clamping ring and a centering body.
[0014] Compared with the prior art, the beneficial effects of the mechanically set hollow bridge plug for cable transmission provided by this utility model are: 1. This utility model provides a mechanically set hollow bridge plug for cable passage. This mechanically set hollow bridge plug for cable passage does not require a pressure difference between the inside and outside of the tubing during release; it can be set and anchored to the tubing simply by lifting and lowering. The entire setting and unsetting process is simple to operate, requiring no additional setting tools, and the mechanical setting and unsetting also demonstrates the reliability of this bridge plug.
[0015] 2. This utility model provides a mechanically set hollow bridge plug for cable passage. This mechanically set hollow bridge plug integrates the tubing anchor with the bridge plug, preventing tubing creep from damaging the casing and improving pressure resistance and service life. It reduces damage to the casing during anchoring operations and also prevents irreversible damage to the casing caused by casing creep, thereby reducing mining costs. This mechanically set hollow bridge plug for cable passage can be used with downhole tools such as supported cable passage packers and electrically controlled production (water) distribution devices. It has high compatibility and can be used with various downhole tools.
[0016] 3. This utility model provides a mechanically set hollow bridge plug for cable passage. The cable connection method of this mechanically set hollow bridge plug is simple, and the cable can be threaded on site, which solves the inconvenience of cable threading at the base for transportation and storage, simplifies the labor intensity, and has high adaptability. It can be used according to the well conditions without considering the limitation of the bridge plug on the cable diameter. Different through hole diameters of the upper cable sealing cap, upper cable sealing elastic washer, lower cable sealing cap and lower cable sealing elastic washer can be replaced. Attached Figure Description
[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a partial structural cross-sectional view of the mechanically set hollow bridge plug for cable passing through a specific embodiment of this utility model; Figure 2 This is a cross-sectional view of the mechanically set hollow bridge plug for cable passing through a specific embodiment of this utility model; Figure 3 This is a schematic diagram of the rubber sleeve assembly for a mechanically set hollow bridge plug for cable transmission provided in a specific embodiment of this utility model; Figure 4 This is a schematic diagram of the upper connecting assembly of the mechanically set hollow bridge plug for cable transmission provided in a specific embodiment of this utility model; Figure 5 This is a schematic diagram of the lower half of the mechanically set hollow bridge plug for cable passing through a specific embodiment of the present utility model; Figure 6 This is a schematic diagram of the structure of the anchoring assembly of the mechanically set hollow bridge plug for cable passing through a specific embodiment of the present utility model; Figure 7 This is a plan view of the reversing slide assembly of the mechanically set hollow bridge plug for cable passing through a specific embodiment of this utility model.
[0018] In the picture: 1. Central tube; 2. Upper connector; 3. Upper guide head; 4. Upper guide cup; 5. Rubber sleeve assembly; 6. Release head; 7. Slip; 8. Lower guide cup; 9. Lower guide head; 10. Lower connector; 11. Reversing slide assembly; 12. Upper cable sealing cap; 13. Upper cable sealing elastic washer; 14. Friction block; 15. Support ring; 16. Limiting ring; 17. Large hoop ring; 18. Small hoop ring; 19. Slip spring; 20. Closing spring; 21. Support spring; 22. Floating ring; 23. Clamping ring; 24. Guide pin; 25. Limiting pin; 26. Sealing pin; 51. Upper rubber sleeve; 52. First barrier ring; 53. Middle rubber sleeve; 54. Second barrier ring; 55. Lower rubber sleeve; 111. Short slide; 112. Long slide; 113. Guide slide; 114. Fixed tooth. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.
[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0022] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0023] See Figure 1-7 This invention provides a mechanically set hollow bridge plug for cable passage. The mechanically set hollow bridge plug includes: a central tube 1, an upper guide cup 4, a lower guide cup 8, an upper guide head 3, a lower guide head 9, an upper connector 2, a lower connector 10, an upper connecting assembly, a lower connecting assembly, a rubber sleeve assembly 5, a release head 6, an anchoring assembly, a guide pin 24, a moving ring 22, and a clamping ring 23. One end of the central tube 1 is sequentially provided with the upper guide cup 4, the upper guide head 3, and the upper connector 2, while the other end is sequentially provided with the lower guide cup 8, the lower guide head 9, and the lower connector 10. The upper connecting assembly is used to connect the cable to the upper guide head 3, and the lower connecting assembly is used to connect the cable to the lower guide head 9. The upper connector 2 is positioned towards the lower connector 10. The rubber sleeve assembly 5, the release head 6, the anchoring assembly, and the clamp ring 23 are sequentially fitted onto the central tube 1. The anchoring assembly includes a slip 7, a straightening body, a support ring 15, and a friction block 14. The slip 7 and the friction block 14 are connected to the support ring 15 through the straightening body. The support ring 15 is fitted onto the central tube 1. The release head 6 is conical, with its small diameter end facing the slip 7. The friction block 14 is screwed onto the clamp ring 23. The moving ring 22 is positioned between the central tube 1 and the clamp ring 23. The central tube 1 is provided with a reversing slide rail assembly 11. A guide pin 24 passes through the moving ring 22. One end of the guide pin 24 abuts against the clamp ring 23, and the other end slides through the reversing slide rail assembly 11.
[0024] During setting, in the stratified oil production field of a mechanically operated well, the mechanically set hollow bridge plug with cable is installed on the tubing string and lowered into the well. Once the predetermined depth is reached, the relative position of the centralizing body relative to the casing is fixed by the friction between the friction block 14 and the wellbore (casing inner wall). Afterward, the tubing string is raised a set distance and then lowered. Since the tubing string is connected to the central tube 1, the central tube 1 moves with the tubing string. The guide pin 24 drives the clamp ring 23, support ring 15, centralizing body, slip 7, and friction block 14 to slide along the central tube 1. When the tubing string is raised, the guide pin 24 slides downward relative to the central tube 1. When the tubing string is lowered, the guide pin 24 slides upward relative to the central tube 1. At this time, the guide pin 24 slides from the short slide 111 of the reversing slide group 11 into the long slide 112, and slides upward towards the central tube 1. The slips 7 are gradually opened by the conical release head 6, and the outer wall of the slips 7 engages with the casing. Under the combined action of the well (formation pressure) and the weight of the tubing string, the tubing string continues to descend. At this time, the slips 7 and the release head 6 slide upward relative to the central tube 1, squeezing the rubber sleeve assembly 5, until all the force is applied to the rubber sleeve assembly 5. The rubber sleeve assembly 5 is compressed and expanded, and firmly embedded in the casing, finally completing the setting. In this embodiment, the set distance is 500-1500mm.
[0025] During unsealing, the tubing is lifted, and the central tube 1 moves upward with the tubing. Under the biting force of the slip 7 and the sleeve, the slip 7 and the release head 6 slide downward relative to the central tube 1, causing the guide pin 24 to move from the long slide 112 of the reversing slide group 11 into the short slide 111. The slip 7 moves downward and exits the conical release head 6. The rubber sleeve assembly 5 contracts and unseales by its own elasticity, thus achieving unsealing.
[0026] This mechanically set hollow bridge plug for cable transfer does not require a pressure difference between the inside and outside of the tubing string during release; it sets and anchors the tubing string simply by lifting and lowering it. The entire setting and unsetting process is simple, requiring no additional setting tools, and the mechanical setting and unsetting mechanism demonstrates the reliability of this bridge plug. The integration of tubing string anchoring and the bridge plug prevents tubing creep from damaging the rubber sleeve, improving pressure resistance and service life. It reduces damage to the casing during anchoring operations and also prevents irreversible damage to the rubber sleeve caused by casing creep, thereby reducing extraction costs. This mechanically set hollow bridge plug for cable transfer can be used with supported cable transfer packers, electrically controlled production (water) distribution devices, and other downhole tools. Its high compatibility allows it to be used with a variety of downhole tools.
[0027] In this embodiment, the reversing slide group 11 includes multiple long slides 112 and multiple short slides 111, which are alternately distributed along the circumference of the central tube 1. Each long slide 112 and each section slide has a guide slide 113 at its exit, connecting adjacent long slides 112 and short slides 111. When not set, the guide pin 24 is in the short slide 111; when set, the guide pin 24 is in the long slide 112. When the guide pin 24 slides to the exit of the short slide 111, it slides along the guide slide 113 towards the long slide 112, impacts the fixed tooth 114 on the opposite side of the slide, and then enters the long slide 112, thus achieving the transition from the short slide 111 to the long slide 112. When the guide pin 24 slides to the exit of the long slide 112, it will slide along the guide slide 113 towards another short slide 111, hit the fixed tooth 114 on the opposite side of the slide, and then enter the short slide 111, thus realizing the transition from the long slide 112 to the short slide 111.
[0028] In this embodiment, the upper connecting assembly includes an upper cable sealing cap 12 and an upper cable sealing elastic washer 13. The upper cable sealing cap 12 is screwed to the upper guide head 3. The two ends of the upper cable sealing elastic washer 13 abut against the upper guide head 3 and the upper cable sealing cap 12, respectively. The cable passes through the upper cable sealing cap 12 and the upper cable sealing elastic washer 13. In this embodiment, the lower connecting assembly includes a lower cable sealing cap and a lower cable sealing elastic washer. The lower cable sealing cap is screwed to the lower guide head 9. The two ends of the lower cable sealing elastic washer abut against the lower guide head 9 and the lower cable sealing cap, respectively. The cable passes through the lower cable sealing cap and the lower cable sealing elastic washer.
[0029] The upper cable sealing cap 12 and the upper cable sealing elastic washer 13 are provided with through holes to accommodate the cable. When the cable is connected to the upper guide head 3 through the upper connecting assembly, the cable passes through the upper cable sealing cap 12 and the upper cable sealing elastic washer 13. The upper cable sealing elastic washer 13 is located between the upper guide head 3 and the upper cable sealing cap 12. The upper cable sealing cap 12 is screwed to the upper guide head 3. The upper cable sealing cap 12 compresses the upper cable sealing elastic washer 13, causing the upper cable sealing elastic washer 13 to be deformed and thus clamping the cable. The lower connecting assembly works similarly to the upper connecting assembly.
[0030] The mechanically set hollow bridge plug for this cable has a simple cable connection method, allowing the cable to be threaded on-site. This solves the inconvenience of threading cables at the base for transportation and storage, simplifies labor intensity, and has high adaptability. It can be used according to well conditions without considering the bridge plug's limitation on the cable diameter. Different through-hole diameters of the upper cable sealing cap 12, upper cable sealing elastic washer 13, lower cable sealing cap, and lower cable sealing elastic washer can be replaced.
[0031] In this embodiment, the rubber cylinder assembly 5 includes an upper rubber cylinder 51, a first barrier ring 52, a middle rubber cylinder 53, a second barrier ring 54 and a lower rubber cylinder 55. The upper rubber cylinder 51, the first barrier ring 52, the middle rubber cylinder 53, the second barrier ring 54 and the lower rubber cylinder 55 are sleeved on the central pipe 1 in sequence.
[0032] In this embodiment, the centralizer includes a limit ring 16, a small hoop ring 18 and a large hoop ring 17. The limit ring 16, the small hoop ring 18 and the large hoop ring 17 are connected by welding. The inner ring of the limit ring 16 is connected to the support ring 15, and the outer ring of the limit ring 16 is connected to the large hoop ring 17. The limit ring 16 is located between the slip 7 and the friction block 14. Both the slip 7 and the friction block 14 are abutted against the inner ring of the large hoop ring 17. A slip spring 7 is provided between the slip 7 and the small hoop ring 18, and a closing spring 20 is provided between the slip 7 and the support ring 15. During解封 (unsetting), the slip 7 can contract and unlock under the action of the slip spring 7.
[0033] In this embodiment, a plurality of support springs 21 are provided between the friction block 14 and the support ring 15.
[0034] The upper sub 2 and the upper guide head 3 are connected by threads, and the upper guide bowl 4 and the upper guide head 3 are connected by threads. The support ring 15, the limit ring 16, the large hoop ring 17 and the small hoop ring 18 are assembled and welded. The small hoop ring 18, the large hoop ring 17 and the limit ring 16 are welded into a centralizer, and a slip spring 7 and a slip 7 are inserted into the centralizer. The support ring 15 is sleeved on the central pipe 1. The support springs 21 and the friction block 14 are loaded into the centralizer using a special tooling. At this time, the guide pin 24 passes through the floating ring 22 and is embedded in the reversing slideway group 11 of the central pipe 1. The guide pin 24 and the reversing slideway group 11 are in an intermittent fit. The clamp ring 23 and the centralizer are connected by threads. The lower guide bowl 8, the lower guide head 9 and the lower sub 10 are sequentially installed on the central pipe 1. After assembly, a pressure test is carried out, and no leakage is qualified.
[0035] In this embodiment, the outer wall of the slip 7 is provided with anti-slip teeth.
[0036] In this embodiment, the cable-passing mechanical setting hollow bridge plug further includes a setting pin 26, and the setting pin 26 connects the release head 6 and the central pipe 1. The setting pin 26 can fix the relative positions of the release head 6 and the central pipe 1. During setting, the setting pin 26 will be cut off.
[0037] In this embodiment, the cable-passing mechanical setting hollow bridge plug further includes a limit pin 25, and the limit pin 25 connects the clamp ring 23 and the centralizer. The limit pin 25 is inserted into the clamp ring 23 and the centralizer to achieve the function of locking and limiting. During setting, the limit pin 25 will be cut off.
[0038] The assembly process of the cable-passing mechanical setting hollow bridge plug: 1. All parts must pass inspection before assembly. Before assembly, remove iron filings and burrs from all parts and clean with diesel fuel.
[0039] 2. Before pressure testing, using the upper cable sealing cap 12, upper cable sealing elastic washer 13, lower cable sealing cap, and lower cable sealing elastic washer, first install the corresponding steel pipe cable (or use steel rods of the same size instead of cables) into the upper guide head 3 and lower guide head 9 respectively. Do not install the seat pin 26. Manually push the main body to check the opening and closing of the slip 7 and the operation of each moving part. The cable sealing elastic washer is also a drum-shaped washer. 3. The maximum diameter of the slip 7 when open is not less than Φ178mm, the free outer diameter of the friction block 14 is Φ171mm, and the ultimate compression outer diameter is Φ148mm.
[0040] 4. Install the setting pin 26, place the packer into a test container with an inner diameter of Φ160mm, test the internal pressure of 25-30MPa, stabilize the pressure for 5 minutes, and it is qualified if there is no leakage or deformation.
[0041] 5. After testing the internal pressure, adjust the slip 7 and the centralizing body assembly to the long slide 112, apply 4-5 tons of mechanical force to the upper joint 2, cut the setting pin 26, and continue setting the rubber sleeve assembly 5.
[0042] 6. After the bridge plug is set, apply external pressure to the lower end of the bridge plug, test the upper pressure of 35MPa and the lower pressure of 35MPa respectively. If there is no leakage after stabilizing the pressure for 5 minutes, it is considered qualified.
[0043] 7. After the pressure test is completed, disassemble and wipe dry all parts, remove water and oil stains, replace the seat pin 26 and other easily damaged parts, and apply thread oil to the threaded connection parts and lubricating oil to the moving parts and sealing parts when reinstalling.
[0044] Obviously, the above-disclosed embodiments of the present invention are merely for illustrating the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to only the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. It is neither necessary nor possible to exhaustively list all embodiments here.
Claims
1. A mechanically set hollow bridge plug for cable transmission, characterized in that, include: The central tube (1) includes an upper guide bowl (4), a lower guide bowl (8), an upper guide head (3), a lower guide head (9), an upper connector (2), a lower connector (10), an upper connecting assembly, a lower connecting assembly, a rubber sleeve assembly (5), a release head (6), an anchoring assembly, a guide pin (24), a moving ring (22), and a clamping ring (23). One end of the central tube (1) is sequentially equipped with an upper guide bowl (4), an upper guide head (3), and an upper connector (2), while the other end is sequentially equipped with a lower guide bowl (8), a lower guide head (9), and a lower connector (10). The upper connecting assembly is used to connect cables to the upper guide head (3), and the lower connecting assembly is used to connect cables to the lower guide head (9). From the upper connector (2) to the lower connector (10), the rubber sleeve assembly (5) and the release head (6) are connected. Anchoring components and clamp rings (23) are sequentially fitted onto the central tube (1). The anchoring components include a slip (7), a straightening body, a support ring (15), and a friction block (14). The slip (7) and the friction block (14) are connected to the support ring (15) through the straightening body. The support ring (15) is fitted onto the central tube (1). The release head (6) is conical, with the small diameter end of the release head (6) facing the slip (7). The friction block (14) is screwed onto the clamp ring (23). The floating ring (22) is located between the central tube (1) and the clamp ring (23). The central tube (1) is provided with a reversing slide group (11). A guide pin (24) passes through the floating ring (22). One end of the guide pin (24) abuts against the clamp ring (23), and the other end slides through the reversing slide group (11).
2. The mechanically set hollow bridge plug for cable transmission according to claim 1, characterized in that: The reversing slide group (11) includes multiple long slides (112) and multiple short slides (111). The multiple long slides (112) and multiple short slides (111) are alternately distributed along the circumference of the central tube (1). Each long slide (112) and each section slide is provided with a guide slide (113) at its exit. The guide slide (113) connects adjacent long slides (112) and short slides (111).
3. The mechanically set hollow bridge plug for cable transmission according to claim 1, characterized in that: The upper connection assembly includes an upper cable sealing cap (12) and an upper cable sealing elastic washer (13). The upper cable sealing cap (12) is screwed to the upper guide head (3). The two ends of the upper cable sealing elastic washer (13) abut against the upper guide head (3) and the upper cable sealing cap (12) respectively. The cable passes through the upper cable sealing cap (12) and the upper cable sealing elastic washer (13).
4. The mechanically set hollow bridge plug for cable transmission according to claim 1, characterized in that: The lower connection assembly includes a lower cable sealing cap and a lower cable sealing elastic washer. The lower cable sealing cap is screwed to the lower guide head (9). The two ends of the lower cable sealing elastic washer abut against the lower guide head (9) and the lower cable sealing cap, respectively. The cable passes through the lower cable sealing cap and the lower cable sealing elastic washer.
5. The mechanically set hollow bridge plug for cable transmission according to claim 1, characterized in that: The rubber tube assembly (5) includes an upper rubber tube (51), a first barrier ring (52), a middle rubber tube (53), a second barrier ring (54), and a lower rubber tube (55), which are sequentially fitted onto the central tube (1).
6. The mechanically set hollow bridge plug for cable transmission according to claim 1, characterized in that: The straightening body includes a limiting ring (16), a small hoop ring (18), and a large hoop ring (17). The limiting ring (16), the small hoop ring (18), and the large hoop ring (17) are welded together. The inner ring of the limiting ring (16) is connected to the support ring (15), and the outer ring of the limiting ring (16) is connected to the large hoop ring (17). The limiting ring (16) is located between the slip (7) and the friction block (14). Both the slip (7) and the friction block (14) abut against the inner ring of the large hoop ring (17). A slip (7) spring is provided between the slip (7) and the small hoop ring (18), and a closing spring (20) is provided between the slip (7) and the support ring (15).
7. The mechanically set hollow bridge plug for cable transmission according to claim 6, characterized in that: Multiple support springs (21) are provided between the friction block (14) and the support ring (15).
8. The mechanically set hollow bridge plug for cable transmission according to claim 1, characterized in that: The outer wall of the card (7) is provided with anti-slip teeth.
9. The mechanically set hollow bridge plug for cable transmission according to claim 1, characterized in that: It also includes a setting pin (26), which connects the release head (6) and the center tube (1).
10. The mechanically set hollow bridge plug for cable transmission according to claim 1, characterized in that: It also includes a limiting pin (25), which connects the clamp ring (23) and the straightening body.