Drilling-free throwing plug

Abstract

The invention relates to the technical field of oil exploitation, and discloses a drilling-free type throwing plug which comprises a circular shell, a driving tailstock and an annular sealing plug, and the driving tailstock is fixed to one end of the circular shell; the sliding shell is fixed to the end, away from the driving tailstock, of the circular shell, a driving unit is installed in the sliding shell, the outer side of the sliding shell is slidably sleeved with a butt joint shell, a locking unit is arranged between the sliding shell and the butt joint shell, and a power switching unit is installed at the top of the driving unit; compared with a traditional throwing plug which can be removed only through drilling and grinding and other complex procedures, the throwing plug can be conveniently taken out after the throwing plug is completed, the operation time can be greatly shortened, the operation cost can be greatly reduced, meanwhile, the work efficiency is improved, and meanwhile the work efficiency is improved. And the precise throwing and sealing performance of the oil-water separator is also beneficial to improving the efficiency and quality of underground operation, and the completeness of an oil layer and a gas layer can be effectively protected.

Description

Technical Field

[0001] The invention relates to the technical field of oil exploitation, in particular to a drilling-free plug. Background Art

[0002] A plug is a special plugging tool that plays a key role in the completion, workover or testing of oil and gas wells. Its core function is to effectively plug specific layers or channels in the well to prevent fluid from flowing in unnecessary areas. For example, in layered mining operations, different oil or gas layers need to be isolated, and plugs can be placed accurately in the corresponding positions to prevent the cross-flow of fluids between the upper and lower layers.

[0003] At present, the existing plugging usually requires the use of special plugging tools, such as plugging machines, plug delivery machines, etc. The plugging tool clamps or fixes the plug, and then lowers it to the predetermined position through channels such as oil pipes and drill pipes. After reaching the target position, the plug is fixed to a specific position on the well wall or in the wellbore by mechanical means (such as a release mechanism, a slip device, etc.). Since the plug has good sealing tightness on the well wall or in the wellbore, it needs to be removed through complex processes such as drilling and grinding after the stratified mining operation is completed. This method is time-consuming and labor-intensive, and during the drilling and grinding process, the drilling and grinding speed is often slow because careful operation is required to avoid additional damage to the wellbore. For example, for some harder plugging materials or in complex well conditions, the drilling and grinding time may be significantly extended. For this reason, we propose a drilling-free plugging method. Summary of the invention

[0004] The object of the present invention is to provide a drilling-free plug to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drill-free plugging type, comprising a circular shell, a driving tailstock and an annular sealing plug, wherein the driving tailstock is fixed at one end of the circular shell; further comprising: a sliding shell fixed at one end of the circular shell away from the driving tailstock, a driving unit is installed inside the sliding shell, a docking shell is slidably sleeved on the outer side of the sliding shell, a locking unit is provided between the sliding shell and the docking shell, and a power switching unit is installed on the top of the driving unit; an installation cavity is provided inside the circular shell, an expansion unit is provided inside the installation cavity, and a positioning unit rotatably connected to the expansion unit is provided outside the circular shell; a hard shell fixed at the center of the annular sealing plug, a transmission unit is provided inside the hard shell, four groups of arc-shaped support plates are evenly fixed on the inner wall of the annular sealing plug, and four groups of expansion units are installed on the outer wall of the hard shell; a traveling unit is provided between the circular shell and the driving tailstock, which is used to push the circular shell to move in the pipeline by itself.

[0006] Preferably, the driving unit includes a first motor, a first gear, a second gear, a power shaft and a bearing seat, the first gear is fixedly connected to the output shaft of the first motor, the second gear is meshingly connected to the first gear, the second gear is fixedly sleeved to the power shaft, the bearing seat and the power shaft are rotatably connected, a movable plate is fixedly fixed to one end of the bearing seat, the power switching unit is mounted on the movable plate, both ends of the power shaft are fixed with internal splines, the outer side of the power shaft is also fixedly sleeved with a third gear, the input end of the locking unit is transmission-connected to the third gear, and the designed driving unit can provide power for the locking unit, the expansion unit and the transmission unit.

[0007] Preferably, the power switching unit includes a first rack fixed on the movable plate, a fourth gear is meshed on the first rack, a second motor is fixedly mounted on the inner wall of the mounting cavity, the fourth gear is fixedly connected to the output shaft of the second motor, a limiting plate is fixed on the inner wall of the sliding shell, and a slot matching the limiting plate is opened at one end of the movable plate. The designed power switching unit can realize the power conversion of the driving unit.

[0008] Preferably, the locking unit includes a fifth gear meshingly connected to both sides of the third gear, a limiting shaft is fixed in the middle hole of the two fifth gears, the outer side of the limiting shaft is rotatably connected to a U-shaped seat through a bearing, the U-shaped seat is fixedly connected to the inner wall of the sliding shell, the fifth gear is meshingly connected to the second rack, a first L-shaped plate is fixed to one side of the second rack, the second rack is fixedly connected to a trapezoidal block through the first L-shaped plate, an avoidance groove for free movement of the second rack is provided between the sliding shell and the docking shell, a trapezoidal locking groove matched with the trapezoidal block is also provided between the sliding shell and the docking shell, and the designed locking unit can realize locking between the sliding shell and the docking shell.

[0009] Preferably, the expansion unit includes a first rotating shaft rotatably connected to the installation cavity through a bearing, a first threaded rod is fixed at one end of the first rotating shaft, a first threaded sleeve is threadedly connected to the outer side of the first threaded rod, a hexagonal block is fixedly sleeved on the outer side of the first threaded sleeve, a connecting rod is hinged on each outer side surface of the hexagonal block, an end of the connecting rod away from the hexagonal block is rotatably connected to a piston block, a sliding groove communicating with the installation cavity is provided on the inner wall of the circular shell, the piston block is slidably connected in the sliding groove, a hollow rod is fixed to the end of the piston block away from the connecting rod, a third motor is installed in the hollow rod, a second rotating shaft is fixed to the output end of the third motor through a coupling, the second rotating shaft is rotatably connected to the inside of the hollow rod through a bearing, an end of the second rotating shaft away from the third motor is transmission-connected to the positioning unit, a first external spline shaft is fixed to the end of the first threaded rod away from the first rotating shaft, and the designed expansion unit can adjust the position of the positioning unit to adapt to the positioning of different pipe diameters.

[0010] Preferably, the positioning unit includes an arc-shaped positioning block, a driving shell is fixed on the inner side of the arc-shaped positioning block, a third rack is fixed inside the driving shell, the third rack is meshingly connected with a sixth gear, a third rotating shaft is fixed in the middle hole of the sixth gear, one end of the third rotating shaft is fixedly connected to the second rotating shaft, and the third rotating shaft is rotatably installed inside the arc-shaped positioning block through a bearing. The designed positioning unit can support and position the overall structure and the tube wall.

[0011] Preferably, the transmission unit includes a fourth rotating shaft rotatably connected to the hard shell through a bearing, a seventh gear is fixedly sleeved on the outer side of the fourth rotating shaft, four groups of eighth gears are meshed on the outer side of the seventh gear, a fifth rotating shaft is fixed in the middle hole of the eighth gear, the fifth gear is rotatably connected to the inner wall of the hard shell through a bearing, an active bevel gear is fixed to one end of the fifth rotating shaft, the active bevel gear is meshed and connected to the passive bevel gear, a sixth rotating shaft is fixed in the middle hole of the passive bevel gear, the sixth rotating shaft is rotatably connected to the hard shell through a bearing, an end of the sixth rotating shaft away from the passive bevel gear is fixedly connected to the input end of the expansion unit, a second external spline shaft is fixed to one end of the fourth rotating shaft, and the designed transmission unit realizes the transmission of power of the power shaft to the expansion unit.

[0012] Preferably, the expansion unit includes a second threaded rod, which is fixedly connected to the sixth rotating shaft, the outer side of the second threaded rod is threadedly connected to a second threaded sleeve, a U-shaped plate is fixed on the second threaded sleeve, a connecting plate is fixedly connected to the U-shaped plate by bolts, one end of the connecting plate is fixedly connected to the arc-shaped support plate, a limiting pin is fixed to the end of the U-shaped plate away from the second threaded sleeve, a second L-shaped plate is slidably connected to the outer side of the limiting pin, and the bottom of the second L-shaped plate is fixed to the outer wall of the hard shell. The designed expansion unit can drive the four groups of arc-shaped support plates to expand outward synchronously under the transmission action of the transmission unit, thereby driving the outer side of the annular sealing plug to expand outward, so that it fits tightly against the pipe wall, thereby achieving sealing.

[0013] Preferably, the traveling unit includes a fourth motor installed inside the circular shell, the output end of the fourth motor is fixedly connected to the seventh rotating shaft through a coupling, the seventh rotating shaft is rotatably connected to the driving tail stock through a bearing, three groups of propellers are fixedly sleeved on the outer side of the seventh rotating shaft, and a plurality of through holes are opened on the driving tail stock. The designed traveling unit is convenient for driving the overall structure to move on its own in a liquid or gas pipeline.

[0014] Preferably, the depth of the trapezoidal locking groove is less than the depth of the avoidance groove, thereby preventing the second rack from being disengaged from the second gear.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Compared with the traditional plugging device which needs to be removed through complicated processes such as drilling and grinding, the present invention can be more conveniently removed after the plugging work is completed through the cooperation of the designed driving unit, locking unit, power switching unit, expansion unit, positioning unit, transmission unit, expansion unit and travel unit, which can greatly reduce the operation time and cost, and reduce the risk of damage to the underground structure. At the same time, its precise delivery and sealing performance also help to improve the efficiency and quality of underground operations, and can effectively protect the integrity of oil and gas layers, so that mining or testing operations can be carried out more smoothly.

[0017] 2. In the present invention, multiple expansion units are adjusted in position on the circular shell through the positioning unit to meet the positioning of pipes or pipe wells of different sizes, so that when the sealing plug is put into place, pipes or pipe wells of various specifications can be stably sealed, which not only improves the flexibility of operation, but also greatly improves the convenience of operation, making the entire sealing process more efficient and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 A half-section diagram of the overall structure of the present invention;

[0020] Figure 3 It is an enlarged view of the local structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the driving unit and the power switching unit of the present invention;

[0022] Figure 5 It is a schematic diagram of the locking unit structure of the present invention;

[0023] Figure 6 It is a schematic diagram of the internal structure of the trapezoidal locking groove in the docking shell of the present invention;

[0024] Figure 7 This is a schematic diagram of the expansion unit structure of the present invention;

[0025] Figure 8 This is a schematic diagram of the positioning unit structure of the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the transmission unit of the present invention;

[0027] Fig.10 This is a schematic diagram of the expansion unit structure of the present invention;

[0028] Fig.11 for Fig.10 A magnified image of the middle A area;

[0029] Fig.12 It is a schematic diagram of three positions of the power shaft in the process of the annular sealing plug completing the sealing work in the present invention;

[0030] Fig.13 It is a schematic diagram of the structure of the traveling unit of the present invention.

[0031] In the figure: 1, circular housing; 2, driving tailstock; 3, annular sealing plug; 4, driving unit; 401, first motor; 402, first gear; 403, second gear; 404, power shaft; 405, bearing seat; 406, moving plate; 407, internal spline; 408, third gear; 5, locking unit; 501, fifth gear; 502, limit shaft; 503, U-shaped seat; 504, second rack; 505, first L-shaped plate; 506, trapezoidal block; 507, trapezoidal locking groove; 6, power switching unit; 601, first rack; 602, fourth gear; 603, second motor; 604, limit plate; 7, expansion unit; 701, first shaft; 702, first threaded rod; 703, first threaded sleeve; 704, hexagonal block; 705, connecting rod; 706, piston block; 707, sliding groove; 708, hollow rod; 709, third Motor; 7010, second rotating shaft; 7011, first external spline shaft; 8, positioning unit; 801, arc-shaped positioning block; 802, driving housing; 803, third rack; 804, sixth gear; 805, third rotating shaft; 9, transmission unit; 901, fourth rotating shaft; 902, seventh gear; 903, eighth gear; 904, fifth rotating shaft; 905, active bevel gear; 906, passive bevel gear; 907, sixth rotating shaft Shaft; 908, second external spline shaft; 10, expansion unit; 1001, second threaded rod; 1002, second threaded sleeve; 1003, U-shaped plate; 1004, connecting plate; 1005, limit pin; 1006, second L-shaped plate; 11, travel unit; 1101, fourth motor; 1102, seventh rotating shaft; 1103, propeller; 12, sliding shell; 13, docking shell; 14, hard shell; 15, arc support plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figure 1 - Figure 3The drill-free plugging plug shown in the figure includes a circular shell 1, a driving tailstock 2 and an annular sealing plug 3, wherein the driving tailstock 2 is fixed at one end of the circular shell 1; further comprising: a sliding shell 12 fixed at one end of the circular shell 1 away from the driving tailstock 2, wherein a driving unit 4 is installed inside the sliding shell 12, a docking shell 13 is slidably sleeved on the outer side of the sliding shell 12, a locking unit 5 is provided between the sliding shell 12 and the docking shell 13, and a power switching unit 6 is installed on the top of the driving unit 4; an installation cavity provided inside the circular shell 1, wherein an expansion unit 7 is provided inside the installation cavity, and a positioning unit 8 rotatably connected to the expansion unit 7 is provided outside the circular shell 1; a hard shell 14 fixed at the exact center of the annular sealing plug 3, wherein a transmission unit 9 is provided inside the hard shell 14, four groups of arc-shaped support plates 15 are evenly fixed on the inner wall of the annular sealing plug 3, and four groups of expansion units 10 are installed on the outer wall of the hard shell 14; a traveling unit 11 provided between the circular shell 1 and the driving tailstock 2, which is used to push the circular shell 1 to move in the pipeline.

[0034] In this solution, the designed driving unit 4 drives the expansion unit 7 to be able to extend and retract on the circular shell 1, thereby driving the ends of the multiple groups of positioning units 8 to tightly grasp the inner wall of the pipe, and then the power switching unit 6 is used to switch the power to the transmission unit 9, and the driving unit 4 continues to work to drive the transmission unit 9 to work, and drives the expansion unit 10 to work, and the expansion unit 10 drives the four groups of arc-shaped support plates 15 to expand outward synchronously, thereby driving the outer side of the annular sealing plug 3 to expand outward, so as to fit tightly on the pipe wall, thereby achieving sealing, and finally the locking unit 5 releases the locking effect between the sliding shell 12 and the docking shell 13; in addition, when removing the sealing plug, as long as the overall structure is moved to the sealing position again, the sliding shell 12 and the docking shell 13 are locked, and then through the designed driving unit 4, locking unit 5, power switching unit 6, expansion unit 7, positioning unit 8, transmission unit 9, expansion unit 10 and travel unit 11 The mutual cooperation makes it more convenient to remove the plug after the work is completed, which can greatly reduce the operation time and cost, and reduce the risk of damage to the underground structure.

[0035] For further information, see Figure 4 The driving unit 4 includes a first motor 401, a first gear 402, a second gear 403, a power shaft 404 and a bearing seat 405. The first gear 402 is fixedly connected to the output shaft of the first motor 401, the second gear 403 is meshed with the first gear 402, the second gear 403 is fixedly sleeved with the power shaft 404, the bearing seat 405 is rotatably connected to the power shaft 404, a moving plate 406 is fixed at one end of the bearing seat 405, the power switching unit 6 is installed on the moving plate 406, both ends of the power shaft 404 are fixed with internal splines 407, and the outer side of the power shaft 404 is also fixedly sleeved with a third gear 408, and the input end of the locking unit 5 is transmission-connected to the third gear 408.

[0036] The first motor 401 drives the first gear 402 to rotate, the first gear 402 drives the second gear 403 to rotate, the second gear 403 drives the power shaft 404 to rotate, the power shaft 404 drives the third gear 408 to rotate, and then drives the input end of the locking unit 5 to move, so that the sliding shell 12 and the docking shell 13 complete the unlocking action, and one end of the power shaft 404 also drives the input end of the expansion unit 7 to rotate, so that the overall structure is positioned with the pipe wall.

[0037] For further information, see Figure 4 The power switching unit 6 includes a first rack 601 fixed on the movable plate 406, a fourth gear 602 is meshed on the first rack 601, a second motor 603 is fixedly installed on the inner wall of the mounting cavity, the fourth gear 602 is fixedly connected to the output shaft of the second motor 603, a limiting plate 604 is fixed on the inner wall of the sliding shell 12, and a slot adapted to the limiting plate 604 is opened at one end of the movable plate 406.

[0038] The principle of the power switching unit 6 driving the driving unit 4 to move is: the second motor 603 drives the fourth gear 602 to rotate, the fourth gear 602 drives the first rack 601 to move, the first rack 601 drives the moving plate 406 to move, and the moving plate 406 drives the bottom driving unit 4 to move left and right, so that the internal splines 407 at both ends of the power shaft 404 are quickly connected with the input end of the locking unit 5 and the input end of the expansion unit 7 respectively, so that the two output ends of the power shaft 404 complete the clutch effect with the locking unit 5 and the expansion unit 7.

[0039] For further information, see Figure 5 The locking unit 5 shown in the figure includes a fifth gear 501 meshingly connected to both sides of the third gear 408, and a limiting shaft 502 is fixed in the middle hole of the two fifth gears 501. The outer side of the limiting shaft 502 is rotatably connected to a U-shaped seat 503 through a bearing, and the U-shaped seat 503 is fixedly connected to the inner wall of the sliding shell 12. The fifth gear 501 is meshingly connected to a second rack 504, and a first L-shaped plate 505 is fixed to one side of the second rack 504. The second rack 504 is fixedly connected to a trapezoidal block 506 through the first L-shaped plate 505. An avoidance groove for free movement of the second rack 504 is provided between the sliding shell 12 and the docking shell 13. A trapezoidal locking groove 507 adapted to the trapezoidal block 506 is also provided between the sliding shell 12 and the docking shell 13. The designed locking unit 5 can realize the locking between the sliding shell 12 and the docking shell 13;

[0040] Among them, see Figure 6The depth of the trapezoidal locking groove 507 is less than the depth of the avoidance groove. When the trapezoidal block 506 is completely moved out of the trapezoidal locking groove 507, part of the length of the second rack 504 is still in the avoidance groove, thereby preventing the second rack 504 from being disengaged from the second gear 403.

[0041] Specifically, the third gear 408 drives the fifth gear 501 to rotate, and the fifth gear 501 drives the second rack 504 to move. Since one second rack 504 is engaged with the top of one of the fifth gears 501, and the other second rack 504 is engaged with the bottom of the other fifth gear 501, the two second racks 504 move closer to or away from each other, thereby driving the trapezoidal block 506 to move out of or into the trapezoidal locking groove 507, so as to quickly complete the unlocking and locking actions between the sliding shell 12 and the docking shell 13.

[0042] For further information, see Figure 2 , Figure 7 and Fig.12 The expansion unit 7 includes a first rotating shaft 701 rotatably connected to the installation cavity through a bearing, a first threaded rod 702 is fixed to one end of the first rotating shaft 701, a first threaded sleeve 703 is threadedly connected to the outer side of the first threaded rod 702, a hexagonal block 704 is fixedly sleeved on the outer side of the first threaded sleeve 703, a connecting rod 705 is hinged on each outer side surface of the hexagonal block 704, and a piston block 706 is rotatably connected to one end of the connecting rod 705 away from the hexagonal block 704, and a sliding groove 707 connected to the installation cavity is provided on the inner wall of the circular shell 1, and the piston The piston block 706 is slidably connected in the sliding groove 707, a hollow rod 708 is fixed to one end of the piston block 706 away from the connecting rod 705, a third motor 709 is installed in the hollow rod 708, a second rotating shaft 7010 is fixed to the output end of the third motor 709 through a coupling, the second rotating shaft 7010 is rotatably connected to the inside of the hollow rod 708 through a bearing, the end of the second rotating shaft 7010 away from the third motor 709 is transmission-connected to the positioning unit 8, and a first external spline shaft 7011 is fixed to one end of the first threaded rod 702 away from the first rotating shaft 701;

[0043] Among them, see Figure 8 The positioning unit 8 includes an arc-shaped positioning block 801, a driving shell 802 is fixed on the inner side of the arc-shaped positioning block 801, a third rack 803 is fixed inside the driving shell 802, the third rack 803 is meshedly connected with a sixth gear 804, a third rotating shaft 805 is fixed in the middle hole of the sixth gear 804, one end of the third rotating shaft 805 is fixedly connected to the second rotating shaft 7010, and the third rotating shaft 805 is rotatably installed inside the arc-shaped positioning block 801 through a bearing.

[0044] Specifically, an output end of the power shaft 404 drives the inner spline 407 to rotate, the inner spline 407 drives the first outer spline shaft 7011 slidably sleeved therewith to rotate, the first outer spline shaft 7011 drives the first threaded rod 702 to rotate, the first threaded rod 702 drives the first threaded sleeve 703 to move, so that the six connecting rods 705 on the outside of the hexagonal block 704 are driven together, and then the piston block 706 is pulled together to move between the installation cavity and the sliding groove 707, so that the hollow rod 708 and the arc-shaped positioning block 801 are moved together. The third motor 709 is started to work, and the third motor 709 drives the second rotating shaft 7010 to rotate, and the second rotating shaft 7010 drives the third rotating shaft 805 to rotate, and the third rotating shaft 805 drives the sixth gear 804 to rotate. The cooperation of the sixth gear 804 and the third rack 803 drives the entire circular shell 1 to fine-tune back and forth in the pipeline, and can accurately reach the preset position, so that the movement is reliable and accurate, and the entire fine-tuning action is simple, fast and reliable.

[0045] In this proposal, please refer to Figure 1 - Figure 8 and Fig.12 The following process is narrated around the sealing work of the whole structure in a liquid environment:

[0046] First, the entire structure is placed in a pipeline. The flow of liquid in the pipeline forms a pressure difference between the front and rear of the entire structure, so that the entire structure can move slowly in the pipeline. When it moves to the vicinity of the preset area, the first motor 401 is immediately started to work, the first motor 401 drives the first gear 402 to rotate, the first gear 402 drives the second gear 403 to rotate, the second gear 403 drives the power shaft 404 to rotate, the power shaft 404 drives the inner spline 407 to rotate, the inner spline 407 drives the first outer spline shaft 7011 slidably sleeved therewith to rotate, the first outer spline shaft 7011 drives the first threaded rod 702 to rotate, the first threaded rod 702 drives the first threaded sleeve 703 to move, so that the six connecting rods 705 on the outside of the hexagonal block 704 are driven together, and then together pull the piston block 706 to move between the installation cavity and the sliding groove 707, so that the hollow rod 708 and the arc positioning block 801 expand outward together, so that the outer side of the arc positioning block 801 is supported and positioned with the pipe wall.

[0047] Afterwards, the inner spline 407 at one end of the power shaft 404 is inserted into the input end of the expansion unit 7 through the power switching unit 6 for rapid docking, and then the power shaft 404 is used to drive the transmission unit 9 to work. The expansion unit 10 can drive the four groups of arc-shaped support plates 15 to expand outward synchronously under the transmission action of the transmission unit 9, thereby driving the outer side of the annular sealing plug 3 to expand outward, so that it fits tightly on the pipe wall, thereby realizing rapid blocking of a specific position of the pipe wall;

[0048] Afterwards, the third gear 408 and the fifth gear 501 on the power shaft 404 are meshed through the power switching unit 6, and the power shaft 404 drives the third gear 408 to rotate, and the third gear 408 drives the fifth gear 501 to rotate, and the fifth gear 501 drives the second rack 504 to move, and the two second racks 504 move away from each other, thereby driving the trapezoidal block 506 to move out of the trapezoidal locking groove 507, so as to quickly complete the unlocking action between the sliding shell 12 and the docking shell 13;

[0049] Finally, the third motor 709 is started again, the third motor 709 drives the second rotating shaft 7010 to rotate, the second rotating shaft 7010 drives the third rotating shaft 805 to rotate, the third rotating shaft 805 drives the sixth gear 804 to rotate, the cooperation of the sixth gear 804 and the third rack 803 drives the entire circular shell 1 to be fine-tuned in the pipeline in the direction away from the annular sealing ring, so that the sliding shell 12 and the docking shell 13 are separated from each other. At this time, the annular sealing plug 3 is put into operation, and then the expansion unit 7 returns the positioning unit 8 to its original position, and then the moving unit 11 is started to move in the opposite direction of the liquid, so that the overall structure moves to the outside of the pipeline, and then the annular sealing plug 3 blocks the pipeline for a period of time.

[0050] It should be noted that: when the annular sealing plug 3 is taken out, the circular shell 1 is introduced into the sealed position in the pipeline, and the expansion unit 7 drives the positioning unit 8 to support and position again, and then the positioning unit 8 drives the sliding shell 12 to dock with the docking shell 13, and the power switching unit 6 works to cut off the power shaft 404 and the first threaded rod 702, so that the third gear 408 and the fifth gear 501 on the power shaft 404 are meshed, and at the same time, the power shaft 404 is also combined with the input end of the transmission unit 9, and then the expansion unit 10 and the locking unit 9 are driven by the rotation of the power shaft 404 through a series of transmission actions. The locking action and the action of the expansion unit 10 driving the outer side of the annular sealing plug 3 to shrink inward are synchronized at this time, and the annular sealing plug 3 can be quickly detached from the pipe wall. Finally, the power switching unit 6 drives the power shaft 404 to dock with the first threaded rod 702. At this time, the expansion unit 7 shrinks the positioning unit 8 back to its original position, and then the traveling unit 11 is started to work and move in the opposite direction of the liquid, so that the annular sealing plug 3 moves to the outside of the pipeline, and can be taken out more conveniently after the plugging work is completed. This can greatly reduce the operation time and cost, and reduce the risk of damage to the underground structure.

[0051] Example 2: Please refer to Fig. 9 - Fig.12 , this implementation further illustrates Example 1.

[0052] Specifically, the transmission unit 9 includes a fourth rotating shaft 901 rotatably connected to the hard shell 14 through a bearing, a seventh gear 902 is fixedly sleeved on the outer side of the fourth rotating shaft 901, four groups of eighth gears 903 are meshed on the outer side of the seventh gear 902, a fifth rotating shaft 904 is fixed in the middle hole of the eighth gear 903, the fifth gear 501 is rotatably connected to the inner wall of the hard shell 14 through a bearing, an active bevel gear 905 is fixed to one end of the fifth rotating shaft 904, the active bevel gear 905 is meshed and connected to the passive bevel gear 906, a sixth rotating shaft 907 is fixed in the middle hole of the passive bevel gear 906, the sixth rotating shaft 907 is rotatably connected to the hard shell 14 through a bearing, one end of the sixth rotating shaft 907 away from the passive bevel gear 906 is fixedly connected to the input end of the expansion unit 10, and a second external spline shaft 908 is fixed to one end of the fourth rotating shaft 901;

[0053] At the same time, the expansion unit 10 includes a second threaded rod 1001, which is fixedly connected to the sixth rotating shaft 907. The outer side of the second threaded rod 1001 is threadedly connected to the second threaded sleeve 1002. A U-shaped plate 1003 is fixed on the second threaded sleeve 1002. A connecting plate 1004 is fixedly connected to the U-shaped plate 1003 by bolts. One end of the connecting plate 1004 is fixedly connected to the arc support plate 15. A limiting pin 1005 is fixed to one end of the U-shaped plate 1003 away from the second threaded sleeve 1002. The outer side of the limiting pin 1005 is slidably connected to the second L-shaped plate 1006. The bottom of the second L-shaped plate 1006 is fixed to the outer wall of the hard shell 14.

[0054] The principle of expansion sealing of the annular sealing ring is as follows: first, the power switching unit 6 drives the inner spline 407 at one end of the power shaft 404 to slide and plug with the second outer spline shaft 908. At this time, the third gear 408 is located at the rightmost position and does not mesh with the fifth gear 501, and the sliding shell 12 and the docking shell 13 are still in a locked state. Then the power shaft 404 drives the fourth rotating shaft 901 to rotate, the fourth rotating shaft 901 drives the seventh gear 902 to rotate, the seventh gear 902 drives the four sets of eighth gears 903 to rotate synchronously, and the eighth gear 903 drives the fifth rotating shaft 90 4 rotates, the fifth rotating shaft 904 drives the active bevel gear 905 to rotate, the active bevel gear 905 drives the passive bevel gear 906 to rotate, the passive bevel gear 906 drives the sixth rotating shaft 907 to rotate, the sixth rotating shaft 907 drives the second threaded rod 1001 to rotate, the second threaded rod 1001 drives the second threaded sleeve 1002 to move, thereby pushing the connecting plate 1004 to move, and then driving the arc support plate 15 to move, at this time, the four groups of arc support plates 15 will expand outward synchronously, thereby driving the outer side of the annular sealing plug 3 to expand outward, so as to fit tightly on the pipe wall, thereby achieving sealing.

[0055] Example 3: Please refer to Fig.13 , this implementation further illustrates Example 1.

[0056] Specifically, the traveling unit 11 includes a fourth motor 1101 installed inside the circular housing 1, the output end of the fourth motor 1101 is fixedly connected to the seventh rotating shaft 1102 through a coupling, the seventh rotating shaft 1102 is rotatably connected to the driving tailstock 2 through a bearing, three sets of propellers 1103 are fixedly sleeved on the outer side of the seventh rotating shaft 1102, and a plurality of through holes are opened on the driving tailstock 2;

[0057] Specifically, when the entire structure is in a liquid or gas environment, due to the flow of the medium in the pipeline, a pressure difference is formed in front and behind the overall structure, allowing the overall structure to move slowly in the pipeline. At this time, by starting the fourth motor 1101, the fourth motor 1101 drives the propeller 1103 to rotate, and the propeller 1103 pushes the medium backward by rotating. According to Newton's third law, the medium will also give the propeller 1103 an equal and opposite reaction force. This reaction force pushes the overall structure to move forward quickly in the medium, so as to quickly move the overall structure to the vicinity of the preset area.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drilling-free plugging device, comprising: A circular shell (1), a driving tailstock (2) and an annular sealing plug (3), wherein the driving tailstock (2) is fixed to one end of the circular shell (1); It is characterized by: also including: A sliding shell (12) is fixed to one end of the circular shell (1) away from the driving tailstock (2), a driving unit (4) is installed inside the sliding shell (12), a docking shell (13) is slidably sleeved on the outer side of the sliding shell (12), a locking unit (5) is provided between the sliding shell (12) and the docking shell (13), and a power switching unit (6) is installed on the top of the driving unit (4); An installation cavity is provided inside the circular shell (1), an expansion unit (7) is provided inside the installation cavity, and a positioning unit (8) is provided outside the circular shell (1) and is rotatably connected to the expansion unit (7); A hard shell (14) is fixed at the exact center of the annular sealing plug (3), a transmission unit (9) is provided inside the hard shell (14), four groups of arc-shaped support plates (15) are evenly fixed on the inner wall of the annular sealing plug (3), and four groups of expansion units (10) are installed on the outer wall of the hard shell (14); A travel unit (11) is arranged between the circular shell (1) and the driving tailstock (2), and is used to push the circular shell (1) to move on its own in the pipeline.

2. The drilling-free plugging device according to claim 1, characterized in that: The driving unit (4) comprises a first motor (401), a first gear (402), a second gear (403), a power shaft (404) and a bearing seat (405); the first gear (402) is fixedly connected to the output shaft of the first motor (401); the second gear (403) is meshingly connected to the first gear (402); the second gear (403) is fixedly sleeved to the power shaft (404); the bearing seat (405) is rotatably connected to the power shaft (404); a moving plate (406) is fixed to one end of the bearing seat (405); the power switching unit (6) is mounted on the moving plate (406); both ends of the power shaft (404) are fixedly provided with internal splines (407); a third gear (408) is also fixedly sleeved to the outer side of the power shaft (404); and the input end of the locking unit (5) is drivingly connected to the third gear (408).

3. The drilling-free plugging device according to claim 2, characterized in that: The power switching unit (6) comprises a first rack (601) fixed on the movable plate (406), a fourth gear (602) meshing on the first rack (601), a second motor (603) fixedly mounted on the inner wall of the mounting cavity, the fourth gear (602) fixedly connected to the output shaft of the second motor (603), a limiting plate (604) fixedly mounted on the inner wall of the sliding shell (12), and a slot matched with the limiting plate (604) being provided at one end of the movable plate (406).

4. The drilling-free plugging device according to claim 2, characterized in that: The locking unit (5) comprises a fifth gear (501) meshingly connected to both sides of the third gear (408), a limiting shaft (502) is fixed in the middle hole of the two fifth gears (501), the outer side of the limiting shaft (502) is rotatably connected to a U-shaped seat (503) through a bearing, the U-shaped seat (503) is fixedly connected to the inner wall of the sliding shell (12), the fifth gear (501) is meshingly connected to a second rack (504), and the second A first L-shaped plate (505) is fixed to one side of the rack (504); the second rack (504) is fixedly connected to a trapezoidal block (506) via the first L-shaped plate (505); an escape groove for the second rack (504) to move freely is provided between the sliding shell (12) and the docking shell (13); and a trapezoidal locking groove (507) adapted to the trapezoidal block (506) is also provided between the sliding shell (12) and the docking shell (13).

5. The drilling-free plugging device according to claim 1, characterized in that: The expansion unit (7) comprises a first rotating shaft (701) rotatably connected to the installation cavity via a bearing, a first threaded rod (702) being fixed at one end of the first rotating shaft (701), a first threaded sleeve (703) being threadedly connected to the outer side of the first threaded rod (702), a hexagonal block (704) being fixedly sleeved on the outer side of the first threaded sleeve (703), a connecting rod (705) being hinged on each outer side surface of the hexagonal block (704), a piston block (706) being rotatably connected to one end of the connecting rod (705) away from the hexagonal block (704), a sliding groove (707) being connected to the installation cavity being provided on the inner wall of the circular shell (1), and the piston block (706) being fixedly sleeved on the outer side of the first threaded sleeve (703). 06) is slidably connected in the sliding groove (707), a hollow rod (708) is fixed to one end of the piston block (706) away from the connecting rod (705), a third motor (709) is installed in the hollow rod (708), the output end of the third motor (709) is fixed with a second rotating shaft (7010) through a coupling, the second rotating shaft (7010) is rotatably connected to the inside of the hollow rod (708) through a bearing, the end of the second rotating shaft (7010) away from the third motor (709) is transmission-connected to the positioning unit (8), and the end of the first threaded rod (702) away from the first rotating shaft (701) is fixed with a first external spline shaft (7011).

6. The drilling-free plugging device according to claim 5, characterized in that: The positioning unit (8) comprises an arc-shaped positioning block (801), a driving shell (802) is fixed on the inner side of the arc-shaped positioning block (801), a third rack (803) is fixed inside the driving shell (802), the third rack (803) is meshingly connected with a sixth gear (804), a third rotating shaft (805) is fixed in the middle hole of the sixth gear (804), one end of the third rotating shaft (805) is fixedly connected to the second rotating shaft (7010), and the third rotating shaft (805) is rotatably mounted inside the arc-shaped positioning block (801) via a bearing.

7. The drilling-free plugging device according to claim 1, characterized in that: The transmission unit (9) comprises a fourth rotating shaft (901) rotatably connected to the hard shell (14) via a bearing, a seventh gear (902) is fixedly sleeved on the outer side of the fourth rotating shaft (901), four groups of eighth gears (903) are meshed on the outer side of the seventh gear (902), a fifth rotating shaft (904) is fixed in the middle hole of the eighth gear (903), the fifth gear (501) is rotatably connected to the inner wall of the hard shell (14) via a bearing, and one end of the fifth rotating shaft (904) is fixedly There is an active bevel gear (905), the active bevel gear (905) is meshedly connected with a passive bevel gear (906), a sixth rotating shaft (907) is fixed in the middle hole of the passive bevel gear (906), the sixth rotating shaft (907) is rotatably connected to the hard shell (14) through a bearing, one end of the sixth rotating shaft (907) away from the passive bevel gear (906) is fixedly connected to the input end of the expansion unit (10), and a second external spline shaft (908) is fixed to one end of the fourth rotating shaft (901).

8. The drilling-free plugging device according to claim 7, characterized in that: The expansion unit (10) comprises a second threaded rod (1001), the second threaded rod (1001) is fixedly connected to the sixth rotating shaft (907), the outer side of the second threaded rod (1001) is threadedly connected to a second threaded sleeve (1002), a U-shaped plate (1003) is fixed to the second threaded sleeve (1002), a connecting plate (1004) is fixedly connected to the U-shaped plate (1003) by bolts, one end of the connecting plate (1004) is fixedly connected to the arc-shaped support plate (15), a limiting pin (1005) is fixed to one end of the U-shaped plate (1003) away from the second threaded sleeve (1002), a second L-shaped plate (1006) is slidably connected to the outer side of the limiting pin (1005), and the bottom of the second L-shaped plate (1006) is fixed to the outer wall of the hard shell (14).

9. The drilling-free plugging device according to claim 1, characterized in that: The traveling unit (11) comprises a fourth motor (1101) installed inside the circular shell (1); the output end of the fourth motor (1101) is fixedly connected to a seventh rotating shaft (1102) via a coupling; the seventh rotating shaft (1102) is rotatably connected to the driving tail stock (2) via a bearing; three sets of propellers (1103) are fixedly sleeved on the outer side of the seventh rotating shaft (1102); and a plurality of through holes are provided on the driving tail stock (2).

10. The drilling-free plugging device according to claim 4, characterized in that: The depth of the trapezoidal locking groove (507) is less than the depth of the avoidance groove.

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