A drillable plugging pipe

Abstract

The present invention provides a drillable plugging pipe, which relates to the technical field of casing repair, including an oil pipe, wherein a plurality of groups of spliced ​​single-tube layers are arranged inside the oil pipe, a threaded frame is fixed on the top of the single-tube layer, and a threaded layer is arranged on the outer surface of the lower end of the single-tube layer, and adjacent single-tube layers are spliced ​​and installed by threaded sleeves of the threaded frame and the threaded layer, an upper circular ring is arranged at the top of the plurality of groups of single-tube layers, and a lower circular ring is arranged at the bottom of the plurality of groups of single-tube layers, and the inner diameters of the upper circular ring and the lower circular ring are the same as those of the single-tube layer. Compared with the prior art, the plugging pipe composed of spliced ​​single-tube layers can be used for internal plugging of oil pipes with different leakage lengths, the upper circular ring and the lower circular ring form a space filled with cement, and the extrusion block on the outer surface of each single-tube layer is driven by the installation component to extrude the inner wall of the oil pipe, thereby limiting the position of the plugging pipe to prevent it from being offset, making its installation and positioning more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of casing repair, in particular to a drillable plugging pipe. Background Art

[0002] The oil extraction process requires the use of oil pipes to transport crude oil from the inside of the oil well. As the depth of extraction increases, the water vapor content in the oil well increases, which accelerates the corrosion of the oil well casing. At the same time, long-term use will cause holes in the oil pipe, thus affecting the oil extraction operation. Therefore, people need to use pipe plugging to seal the oil pipeline to ensure the normal use of the oil pipe. The drillable pipe plugging currently used is often used to sleeve the oil pipe on the outside of the pipe body.

[0003] When installing the plugging pipe, it needs to be fixed at the leaking part of the oil pipe. However, since the oil pipe is generally long, it is not easy to directly put the plugging pipe into the oil pipe. At the same time, it is not convenient to adjust the length of the plugging pipe according to the length of the leaking position of the oil pipe for matching installation. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a drillable plugging pipe to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. The plugging pipe composed of spliced ​​single tube layers can be used for internal plugging of oil pipes with different leakage lengths. The upper ring and the lower ring form a space for filling cement. The extrusion blocks on the outer surface of each single tube layer are driven by the installation assembly to squeeze the inner wall of the oil pipe, thereby limiting the position of the plugging pipe to prevent it from shifting, making its installation and positioning more convenient.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a drillable plugging pipe, including an oil pipe, a plugging pipe fitting is arranged inside the oil pipe, the plugging pipe fitting includes a single tube layer, multiple groups of the single tube layers are spliced ​​and installed inside the oil pipe, a threaded frame is fixed on the top of the single tube layer, and a threaded layer is arranged on the outer surface of the lower end of the single tube layer, and adjacent single tube layers are spliced ​​and installed by threaded sleeves of the threaded frame and the threaded layer, the top of multiple groups of the single tube layers are provided with an upper ring, and the bottom of multiple groups of the single tube layers are provided with a lower ring, and the inner diameters of the upper and lower rings are the same as those of the single tube layers, the outer edges of the upper and lower rings slide along the inner wall of the oil pipe, and the outer wall of the single tube layer is equidistantly connected. Four extrusion blocks are provided, and a second telescopic column is provided at a position corresponding to the extrusion block on the outer wall of the single tube layer, and the extended end of the second telescopic column is fixedly connected to the extrusion block. A mounting assembly is provided on the top of the upper circular ring, and the mounting assembly includes a top plate, a first telescopic rod is fixed to the bottom of the center of the top plate, and the bottom of the first telescopic rod is connected to the lower circular ring, and four second telescopic rods are provided on the periphery of the top plate located at the first telescopic rod, and the second telescopic rods are connected to the extrusion block, a vertical rod is fixed inside the extrusion block, both ends of the vertical rod pass through the extrusion block, an insert is fixed on the top of the vertical rod, and the bottom of one group of vertical rods is slidably plugged with the insert at the top of the next group of vertical rods, and a filling port is provided on the surface of the upper circular ring.

[0006] Furthermore, the mounting assembly also includes a first slide groove, the top plate is provided with a first slide groove at positions corresponding to the four second telescopic rods, and a slider is slidably connected inside the first slide groove, and the top of the second telescopic rod is rotatably mounted on the bottom of the slider through a bearing.

[0007] Furthermore, a turntable is rotatably mounted at the center of the top of the top plate through a bearing, and four connecting rods are rotatably mounted on the side of the turntable through a rotating shaft, and the other end of the connecting rod is rotatably connected to the top of the slider through the rotating shaft.

[0008] Furthermore, the upper and lower rings are both provided with second slide grooves at positions corresponding to the first slide grooves, and a plug plate is slidably connected in the second slide grooves, the top of the vertical rod at the bottom of the upper ring is slidably inserted into the plug plate, and the bottom of the vertical rod at the top of the lower ring is also slidably inserted into the plug plate, a screw barrel is fixed to the top of the plug plate of the upper ring, and a stud is fixed to the extended end of the second telescopic rod, and the stud can be threadedly inserted into the screw barrel.

[0009] Furthermore, a bottom plate is fixed to the bottom of the plug plate of the lower circular ring, a connecting frame is fixed to the bottom of the extended end of the first telescopic rod, and the bottom plate is slidably plugged into the inside of the connecting frame.

[0010] Furthermore, the plugging pipe fitting also includes a first connecting plate, the surface of the second telescopic rod close to the stud is rotatably sleeved with the first connecting plate through a bearing, the surface of the screw barrel is fixed with a second connecting plate, and the upper ring is located on both sides of the second slide groove and fixed with the first telescopic column.

[0011] Furthermore, a round head is fixed on the top of the first telescopic column, a socket is opened at the position of the second connecting plate corresponding to the first telescopic column, and the round head of the first telescopic column can be inserted into the socket, and an inclined plate is fixed on the surface of the first connecting plate located at the top of the first telescopic column, and the top of the first telescopic column is in sliding contact with the inclined plate.

[0012] Furthermore, a spring is fixed inside the storage end of the first telescopic column, and the other end of the spring is fixedly connected to the bottom of the extension end of the first telescopic column. A movable notch is opened on the side of the first telescopic column, and a horizontal plate is fixed to the extension ends of the two first telescopic columns, and the horizontal plate slides along the movable notch.

[0013] Furthermore, an outer screw frame is fixed to the inner ring of the upper circular ring, and the outer screw frame is threadedly connected to the upper threaded frame of the single tube layer, a cone is fixed to the top of the upper circular ring, an inner screw frame is fixed to the inner ring of the lower circular ring, and the inner screw frame is threadedly sleeved on the surface of the lower threaded layer of the single tube layer.

[0014] Furthermore, a swivel is rotatably mounted on the outer surface of the single tube layer via a bearing, and the storage end of the second telescopic column is fixed on the swivel.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, each layer of the single tube layer is installed by mutually threading the thread frame and the thread layer. The thread frame and the thread layer of the uppermost and lowermost single tube layer are connected with the outer thread frame and the inner thread frame of the upper ring and the lower ring to form a complete main body, wherein a certain distance can be provided between the single tube layer and the inner wall of the oil pipe for filling cement. The upper ring and the lower ring slide along the inner wall of the oil pipe for sealing the cement. When the single tube layer is spliced, it is plugged in by the vertical rod and the plug tube, and then connected with the plug plate of the upper ring and the lower ring. When the plug plate moves, each group of vertical rods will move, and then the extrusion block will also move synchronously. The second telescopic column on the back of the extrusion block will extend until the extrusion block is in extrusion contact with the inner wall of the oil pipe. Because the second telescopic column is installed on the outer surface of the single tube layer through the swivel, the plugging of the outer vertical rod will not be affected when the single tube layer is connected by rotating the thread.

[0017] 2. After the stud and the screw barrel of the second telescopic rod are unlocked by the present invention, the first telescopic column is not restricted, and the extended end moves upward by the elastic force of the spring, and the extended end and the round head of the first telescopic column are inserted into the inside of the insertion hole, and the position of the second connecting plate is horizontally limited, so that the position of the extrusion block is kept in extrusion contact with the inner wall of the oil pipe and will not move. This structure can also facilitate the release of the contact between the extrusion block and the inner wall of the oil pipe. After the second telescopic rod is re-inserted into the screw barrel of the plug plate, the first telescopic column is pressed down and misaligned with the position of the plug hole, so that the plug plate can be moved to the rear end of the second slide groove, which can be used to adjust the installation position to avoid the problem of misalignment after one installation and inability to adjust. The plug plate inside the second slide groove can block the redundant position of the second slide groove to reduce the exposure of cement.

[0018] 3. The present invention inserts the stud at the bottom of the second telescopic rod into the inside of the screw barrel. When the extrusion block is close to the outer wall of the single tube layer, the bottom plate at the bottom of the lower circular ring is inserted into the inside of the connecting frame to maintain the connection relationship between the plugging pipe fitting and the installation assembly, so as to facilitate the insertion of the plugging pipe fitting into the oil pipe through the installation assembly. The turntable of the top plate is rotated, and the four connecting rods drive the slider to slide along the first sliding groove. Through the connection between the second telescopic rod and the vertical rod, the extrusion block on the outside of each group of single tube layers can be driven to move at the same time to squeeze the inner wall of the oil pipe, thereby maintaining the stability of the device after installation. When the plug plate moves outward along the second sliding groove, the bottom plate is gradually separated from the connecting frame, so that the connecting frame can be retracted conveniently through the first telescopic rod. In this structure, the first telescopic rod and the second telescopic rod can be electrically driven. At the same time, the movable length of the first telescopic rod and the second telescopic rod should be adapted to the length of the oil pipe, so as to facilitate the insertion of the plugging pipe fitting into the oil pipe for installation.

[0019] 4. Compared with the prior art, the present invention is able to be used for internal plugging of oil pipes with different leakage lengths by means of a plugging pipe composed of spliced ​​single-tube layers. The upper ring and the lower ring form a space for filling cement. The extrusion blocks on the outer surface of each single-tube layer are driven by the installation assembly to squeeze the inner wall of the oil pipe, thereby limiting the position of the plugging pipe to prevent it from shifting, making its installation and positioning more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a drillable plugging pipe according to the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a drillable pipe plugging installation assembly of the present invention;

[0022] Figure 3 It is a schematic diagram of the connection between a drillable pipe plugging installation assembly and a lower ring according to the present invention;

[0023] Figure 4 It is a schematic diagram of the separation of a single pipe layer and an upper ring and a lower ring of a drillable plugging pipe according to the present invention;

[0024] Figure 5 This is a schematic diagram of a single-tube layer connection of a drillable plugging pipe according to the present invention;

[0025] Figure 6 This is a schematic diagram of the connection between an upper ring and a mounting assembly of a drillable plugging pipe according to the present invention;

[0026] Figure 7 It is an enlarged schematic diagram of the connection between the second telescopic rod and the upper ring of a drillable pipe plugging device of the present invention;

[0027] Figure 8 This is a schematic diagram of the separation of the second telescopic rod and the upper ring of a drillable pipe plugging device according to the present invention.

[0028] In the figure: 1, oil pipe; 2, mounting assembly; 21, top plate; 22, first slide; 23, turntable; 24, connecting rod; 25, slider; 26, first telescopic rod; 27, second telescopic rod; 28, connecting frame; 29, bottom plate; 3, plugging pipe fitting; 31, upper ring; 32, cone; 33, lower ring; 34, single pipe layer; 35, swivel; 36, extrusion block; 37, vertical rod; 38, threaded frame; 39, screw Layer; 310, inner screw frame; 311, outer screw frame; 312, insert tube; 313, second slide groove; 314, first telescopic column; 315, first connecting plate; 316, second connecting plate; 317, plug hole; 318, round head; 319, movable notch; 320, spring; 321, horizontal plate; 322, insert plate; 323, inclined plate; 324, stud; 325, screw barrel; 4, filling port; 5, second telescopic column. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] See also Figures 1 to 8The present invention provides a technical solution: a drillable plugging pipe, comprising an oil pipe 1, wherein the oil pipe 1 is provided with a plugging pipe fitting 3, wherein the plugging pipe fitting 3 comprises a single tube layer 34, wherein multiple groups of the single tube layers 34 are spliced ​​and installed inside the oil pipe 1, wherein a threaded frame 38 is fixed on the top of the single tube layer 34, and a threaded layer 39 is provided on the outer surface of the lower end of the single tube layer 34, wherein adjacent single tube layers 34 are spliced ​​and installed through the threaded sleeve connection of the threaded frame 38 and the threaded layer 39, wherein the top of multiple groups of the single tube layers 34 is provided with an upper ring 31, and multiple groups of the single tube layers 34 are spliced ​​and installed. The bottom of the upper ring 31 is provided with a lower ring 33, and the inner diameters of the upper ring 31 and the lower ring 33 are the same as those of the single tube layer 34. The outer edges of the upper ring 31 and the lower ring 33 slide along the inner wall of the oil pipe 1. Four extrusion blocks 36 are equidistantly arranged on the outer wall of the single tube layer 34. A second telescopic column 5 is arranged at a position corresponding to the extrusion block 36 on the outer wall of the single tube layer 34, and the extended end of the second telescopic column 5 is fixedly connected to the extrusion block 36. The top of the upper ring 31 is provided with a mounting assembly 2, and the mounting assembly 2 includes a top plate 21. The bottom of the center of the top plate 21 is fixed with a second telescopic column 5. A telescopic rod 26, and the bottom of the first telescopic rod 26 is connected to the lower ring 33, the top plate 21 is located on the periphery of the first telescopic rod 26 and is provided with four second telescopic rods 27, and the second telescopic rods 27 are connected to the extrusion block 36, and a vertical rod 37 is fixed inside the extrusion block 36, and the two ends of the vertical rod 37 pass through the extrusion block 36, and the top of the vertical rod 37 is fixed with an insert 312, and the bottom of one group of vertical rods 37 is slidably plugged with the insert 312 at the top of the next group of vertical rods 37, and a filling port 4 is opened on the surface of the upper ring 31. When the device is used, According to the leakage length of the oil pipe 1, select the corresponding number of single tube layers 34 for splicing and installation, and seal the top and top of the single tube layer 34 through the upper ring 31 and the lower ring 33, send the plugging pipe 3 into the oil pipe 1 through the installation component 2, and expand the extrusion block 36 on the outer wall of the single tube layer 34 through the installation component 2 to extrude the inner wall of the oil pipe 1 to maintain the stability of the installation of the plugging pipe 3. After the installation component 2 is withdrawn, cement is added to the cavity of the upper ring 31 and the lower ring 33 through the filling port 4 of the upper ring 31 to reinforce the installation of the plugging pipe 3.

[0031] In this embodiment, the mounting assembly 2 further includes a first slide groove 22, the top plate 21 is provided with a first slide groove 22 at positions corresponding to the four second telescopic rods 27, and a slider 25 is slidably connected inside the first slide groove 22, the top of the second telescopic rod 27 is rotatably mounted on the bottom of the slider 25 through a bearing, a turntable 23 is rotatably mounted at the center of the top of the top plate 21 through a bearing, and four connecting rods 24 are rotatably mounted on the side of the turntable 23 through a rotating shaft, the other end of the connecting rod 24 is rotatably connected to the top of the slider 25 through a rotating shaft, and the upper ring 31 and the lower ring 33 are opposite to each other. A second slide groove 313 is provided at the position of the first slide groove 22, and a plug plate 322 is slidably connected in the second slide groove 313, the top of the vertical rod 37 at the bottom of the upper ring 31 is slidably plugged into the plug plate 322, and the bottom of the vertical rod 37 at the top of the lower ring 33 is also slidably plugged into the plug plate 322, a screw barrel 325 is fixed to the top of the plug plate 322 of the upper ring 31, and a stud 324 is fixed to the extended end of the second telescopic rod 27, and the stud 324 can be threadedly plugged into the screw barrel 325, a bottom plate 29 is fixed to the bottom of the plug plate 322 of the lower ring 33, and the A connecting frame 28 is fixed to the bottom of the extended end of a telescopic rod 26, and the bottom plate 29 is slidably inserted into the inside of the connecting frame 28. The stud 324 at the bottom of the second telescopic rod 27 is inserted into the inside of the screw barrel 325. When the extrusion block 36 is close to the outer wall of the single tube layer 34, the bottom plate 29 at the bottom of the lower ring 33 is inserted into the inside of the connecting frame 28 to maintain the connection relationship between the plugging pipe 3 and the installation assembly 2, so that the plugging pipe 3 is conveniently sent into the inside of the oil pipe 1 through the installation assembly 2. The turntable 23 of the top plate 21 is rotated, and the four connecting rods 24 drive the slider 25 to slide along the first slide groove 22. Through the second telescopic rod 27 and the vertical rod The connection between 37 can simultaneously drive the extrusion block 36 on the outside of each group of single-tube layers 34 to move, squeeze the inner wall of the oil pipe 1, so as to maintain the stability of the device after installation. When the plug plate 322 moves outward along the second slide groove 313, the bottom plate 29 gradually separates from the connecting frame 28, which is convenient for retracting the connecting frame 28 through the first telescopic rod 26. In this structure, the first telescopic rod 26 and the second telescopic rod 27 can be electrically driven. At the same time, the movable length of the first telescopic rod 26 and the second telescopic rod 27 should be adapted to the length of the oil pipe 1, so as to facilitate the insertion of the plugging pipe 3 into the oil pipe 1 for installation.

[0032] In this embodiment, the plugging pipe 3 also includes a first connecting plate 315, and the first connecting plate 315 is rotatably sleeved on the surface of the second telescopic rod 27 close to the stud 324 through a bearing, and a second connecting plate 316 is fixed on the surface of the screw barrel 325. The upper ring 31 is located on both sides of the second slide groove 313 and fixed with the first telescopic column 314, and the top of the first telescopic column 314 is fixed with a round head 318, and the second connecting plate 316 is provided with a plug hole 317 at a position corresponding to the first telescopic column 314, and the round head 318 of the first telescopic column 314 can be inserted into the plug hole 317, and the first connecting plate 315 is located on the top of the first telescopic column 314. The surface is fixed with an inclined plate 323, and the top of the first telescopic column 314 is in sliding contact with the inclined plate 323. A spring 320 is fixed inside the storage end of the first telescopic column 314, and the other end of the spring 320 is fixedly connected to the bottom of the extension end of the first telescopic column 314. A moving notch 319 is opened on the side of the first telescopic column 314. A horizontal plate 321 is fixed to the extension ends of the two first telescopic columns 314, and the horizontal plate 321 slides along the moving notch 319. After the extension end stud 324 of the second telescopic rod 27 is threadedly inserted into the screw barrel 325, the movement of the second telescopic rod 27 can drive the vertical rod 37 and the extrusion block 36 to move synchronously. In this process, the plug plate 322 will also move along the second slide groove 313. As the second telescopic rod 27 moves, the first connecting plate 315 on its surface squeezes the first connecting plate 315 at the corresponding position through the inclined plate 323. The extended end of the telescopic column 314 is retracted to compress the spring 320 inside the storage end. Because the extended ends of the first telescopic column 314 on both sides of the second slide groove 313 are connected by the cross plate 321, they are pressed down together. The cross plate 321 slides along the moving notch 319 until the extrusion block 36 is squeezed and contacted with the inner wall of the oil pipe 1. At this time, the position of the first telescopic column 314 is just located at the bottom of the insertion hole 317 of the second connecting plate 316. After the stud 324 and the screw barrel 325 of the second telescopic rod 27 are unlocked, the first telescopic column 314 is not restricted. The extended end moves upward by the elastic force of the spring 320, and the extended end of the first telescopic column 314 and the round head 318 are inserted into the inside of the insertion hole 317, which horizontally limits the position of the second connecting plate 316 and keeps the extrusion block 36 The position is in squeeze contact with the inner wall of the oil pipe 1 and will not move. This structure can also facilitate the release of the contact between the extrusion block 36 and the inner wall of the oil pipe 1. After the second telescopic rod 27 is re-inserted into the screw barrel 325 of the plug plate 322, the first telescopic column 314 is pressed down and misaligned with the position of the insertion hole 317, so that the plug plate 322 can be moved to the rear end of the second slide groove 313, which can be used to adjust the installation position to avoid the problem of misalignment after one installation and cannot be adjusted. The plug plate 322 inside the second slide groove 313 can block the redundant position of the second slide groove 313 to reduce the exposure of cement. The plug plate 322 is moved outward along the second slide groove 313, and the bottom plate 29 is gradually separated from the connecting frame 28. After the bottom plate 29 is completely separated from the connecting frame 28,The stud 324 at the bottom of the second telescopic rod 27 is rotated and separated from the screw barrel 325, so that the connecting frame 28 can be retracted through the first telescopic rod 26. The second telescopic rod 27 is also separated from the entire pipeline assembly. The spliced ​​single tube layer 34 is squeezed against the inner wall of the oil pipe 1 by the squeezing block 36 to maintain stability. Therefore, the first telescopic rod 26 and the second telescopic rod 27 connected to the entire installation assembly 2 and the plugging pipe 3 can be pulled out from the inside of the oil pipe 1, completing the separation of the installation assembly 2 and the plugging pipe 3.

[0033] In this embodiment, the inner ring of the upper ring 31 is fixed with an outer screw frame 311, and the outer screw frame 311 is threadedly connected with the upper threaded frame 38 of the single tube layer 34, the top of the upper ring 31 is fixed with a cone 32, the inner ring of the lower ring 33 is fixed with an inner screw frame 310, and the inner screw frame 310 is threadedly sleeved on the surface of the lower threaded layer 39 of the single tube layer 34, a swivel 35 is rotatably installed on the outer surface of the single tube layer 34 through a bearing, and the storage end of the second telescopic column 5 is fixed on the swivel 35, each layer of the single tube layer 34 is threadedly spliced ​​and installed with each other between the thread frame 38 and the thread layer 39, the thread frame 38 and the thread layer 39 of the uppermost and lowermost single tube layer 34 are connected with the outer screw frame 311 and the inner screw frame 310 of the upper ring 31 and the lower ring 33 to form a complete main body, wherein the single tube layer 34 is connected to the inner surface of the oil pipe 1 There can be a certain distance between the walls for filling cement. The upper ring 31 and the lower ring 33 slide along the inner wall of the oil pipe 1 to seal the cement. The single tube layer 34 is plugged in through the vertical rod 37 and the plug tube 312 during splicing, and then connected to the plug plate 322 of the upper ring 31 and the lower ring 33. When the plug plate 322 moves, each group of vertical rods 37 will move, and then the extrusion block 36 will also move synchronously. The second telescopic column 5 on the back of the extrusion block 36 will extend until the extrusion block 36 is in contact with the inner wall of the oil pipe 1. Because the second telescopic column 5 is installed on the outer surface of the single tube layer 34 through the swivel 35, the single tube layer 34 will not affect the plugging of the outer vertical rod 37 when it is connected by rotating the thread, and the plugging pipe 3 is fixed inside the oil pipe 1. This structure can be installed by free splicing to meet the length that is the same as the length that needs to be blocked for leakage of the oil pipe 1.

[0034] When the device is used, each layer of the single tube layer 34 is installed by threading the thread frame 38 and the thread layer 39, and the thread frame 38 and the thread layer 39 of the uppermost and lowermost single tube layer 34 are connected with the outer screw frame 311 and the inner screw frame 310 of the upper ring 31 and the lower ring 33 to form a complete main body, wherein a certain distance can be provided between the single tube layer 34 and the inner wall of the oil pipe 1 for filling cement, and the upper ring 31 and the lower ring 33 slide along the inner wall of the oil pipe 1 for sealing cement, and the single tube layer 34 is connected by the vertical rod 37 and the plug 312 during splicing, and then connected with the plug plate 322 of the upper ring 31 and the lower ring 33, and when the plug plate 322 moves When the oil pipe 1 is moved, each set of vertical rods 37 will move, and then the extrusion block 36 will also move synchronously, and the second telescopic column 5 on the back of the extrusion block 36 will extend until the extrusion block 36 is squeezed and contacted with the inner wall of the oil pipe 1. Because the second telescopic column 5 is installed on the outer surface of the single tube layer 34 through the swivel 35, the single tube layer 34 will not affect the plugging of the outer vertical rod 37 when it is connected by rotating the thread, and the plugging pipe 3 is fixed inside the oil pipe 1. This structure can be installed by free splicing to meet the length that is the same as the length required to plug the leakage of the oil pipe 1. The stud 324 at the bottom of the second telescopic rod 27 is inserted into the screw barrel 325. When the extrusion block 36 is close to the outer wall of the single tube layer 34 The bottom plate 29 at the bottom of the lower circular ring 33 is inserted into the connecting frame 28 to maintain the connection between the plugging pipe 3 and the installation assembly 2, so as to facilitate the insertion of the plugging pipe 3 into the oil pipe 1 through the installation assembly 2. The turntable 23 of the top plate 21 is rotated, and the four connecting rods 24 drive the slider 25 to slide along the first slide groove 22. Through the connection between the second telescopic rod 27 and the vertical rod 37, the extrusion block 36 on the outer side of each group of single tube layers 34 can be driven to move at the same time to squeeze the inner wall of the oil pipe 1, so as to maintain the stability of the device after installation. Cement is added to the cavity of the upper circular ring 31 and the lower circular ring 33 through the filling port 4 of the upper circular ring 31 to reinforce the installation of the plugging pipe 3. After the pouring and cooling, the plug plate 322 is moved outward along the second slide groove 313, and the bottom plate 29 is gradually separated from the connecting frame 28. After the bottom plate 29 is completely separated from the connecting frame 28, the bottom stud 324 of the second telescopic rod 27 is rotated and separated from the screw barrel 325, so that the connecting frame 28 can be easily retracted through the first telescopic rod 26. The second telescopic rod 27 is also separated from the entire pipeline assembly. The spliced ​​single tube layer 34 is squeezed against the inner wall of the oil pipe 1 by the extrusion block 36 to maintain stability, so that the first telescopic rod 26 and the second telescopic rod 27 connected to the entire installation assembly 2 and the plugging pipe fitting 3 can be pulled out from the inside of the oil pipe 1, completing the separation of the installation assembly 2 and the plugging pipe fitting 3.

[0035] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A drillable plugging pipe, comprising an oil pipe (1), characterized in that: The oil pipe (1) is provided with a plugging pipe fitting (3) inside. The plugging pipe fitting (3) comprises a single tube layer (34). Multiple groups of the single tube layers (34) are spliced ​​and installed inside the oil pipe (1). A threaded frame (38) is fixed on the top of the single tube layer (34), and a threaded layer (39) is provided on the outer surface of the lower end of the single tube layer (34). Adjacent single tube layers (34) are spliced ​​and installed by threaded sleeve connection of the threaded frame (38) and the threaded layer (39). The top of the multiple groups of the single tube layers (34) is provided with an upper ring (31), and the bottom of the multiple groups of the single tube layers (34) is provided with a lower ring (3 3), and the inner diameters of the upper circular ring (31) and the lower circular ring (33) are the same as those of the single tube layer (34), the outer edges of the upper circular ring (31) and the lower circular ring (33) slide along the inner wall of the oil pipe (1), four extrusion blocks (36) are equidistantly arranged on the outer wall of the single tube layer (34), a second telescopic column (5) is arranged at a position corresponding to the extrusion blocks (36) on the outer wall of the single tube layer (34), and the extended end of the second telescopic column (5) is fixedly connected to the extrusion block (36), a mounting assembly (2) is arranged on the top of the upper circular ring (31), and the mounting assembly (2) comprises a top plate (21), and the top plate ( 21) A first telescopic rod (26) is fixed at the bottom of the center of the circle, and the bottom of the first telescopic rod (26) is connected to the lower ring (33), the mounting assembly (2) further includes a first slide groove (22), the upper ring (31) and the lower ring (33) are both provided with a second slide groove (313) at positions corresponding to the first slide groove (22), and a plug plate (322) is slidably connected in the second slide groove (313), a bottom plate (29) is fixed at the bottom of the plug plate (322) of the lower ring (33), a connecting frame (28) is fixed at the bottom of the extended end of the first telescopic rod (26), and the bottom plate (29) ) is slidably plugged into the connecting frame (28), the top plate (21) is located on the periphery of the first telescopic rod (26) and is provided with four second telescopic rods (27), and the second telescopic rods (27) are connected to the extrusion block (36), a vertical rod (37) is fixed inside the extrusion block (36), both ends of the vertical rod (37) pass through the extrusion block (36), and an insert tube (312) is fixed on the top of the vertical rod (37), the bottom of one group of vertical rods (37) is slidably plugged into the insert tube (312) at the top of the next group of vertical rods (37), and a filling port (4) is opened on the surface of the upper ring (31).

2. The drillable plugging pipe according to claim 1, characterized in that: The top plate (21) is provided with a first slide groove (22) at positions corresponding to the four second telescopic rods (27), and a slider (25) is slidably connected inside the first slide groove (22), and the top of the second telescopic rod (27) is rotatably mounted on the bottom of the slider (25) via a bearing.

3. The drillable plugging pipe according to claim 2, characterized in that: A rotating disk (23) is rotatably mounted at the center of the top circle of the top plate (21) via a bearing, and four connecting rods (24) are rotatably mounted on the sides of the rotating disk (23) via a rotating shaft at equal intervals, and the other end of the connecting rod (24) is rotatably connected to the top of the slider (25) via a rotating shaft.

4. The drillable plugging pipe according to claim 3, characterized in that: The top of the vertical rod (37) at the bottom of the upper circular ring (31) is slidably inserted into the plug plate (322), and the bottom of the vertical rod (37) at the top of the lower circular ring (33) is also slidably inserted into the plug plate (322). A screw barrel (325) is fixed to the top of the plug plate (322) of the upper circular ring (31), and a stud (324) is fixed to the extended end of the second telescopic rod (27). The stud (324) can be threadedly inserted into the screw barrel (325).

5. The drillable plugging pipe according to claim 4, characterized in that: The plugging pipe fitting (3) further comprises a first connecting plate (315), the first connecting plate (315) being rotatably sleeved on the surface of the second telescopic rod (27) close to the stud (324) via a bearing, a second connecting plate (316) being fixed on the surface of the screw barrel (325), and the first telescopic column (314) being fixed on both sides of the upper ring (31) located at the second slide groove (313).

6. The drillable plugging pipe according to claim 5, characterized in that: A round head (318) is fixed on the top of the first telescopic column (314); a plug hole (317) is provided on the second connecting plate (316) at a position corresponding to the first telescopic column (314); and the round head (318) of the first telescopic column (314) can be inserted into the plug hole (317); and an inclined plate (323) is fixed on the surface of the first connecting plate (315) located at the top of the first telescopic column (314); and the top of the first telescopic column (314) is in sliding contact with the inclined plate (323).

7. The drillable plugging pipe according to claim 6, characterized in that: A spring (320) is fixed inside the storage end of the first telescopic column (314), and the other end of the spring (320) is fixedly connected to the bottom of the extension end of the first telescopic column (314). A movable notch (319) is provided on the side of the first telescopic column (314). A horizontal plate (321) is fixed to the extension ends of the two first telescopic columns (314), and the horizontal plate (321) slides along the movable notch (319).

8. The drillable plugging pipe according to claim 7, characterized in that: An outer screw frame (311) is fixed to the inner ring of the upper circular ring (31), and the outer screw frame (311) is threadedly connected to the upper thread frame (38) of the single tube layer (34). A cone (32) is fixed to the top of the upper circular ring (31). An inner screw frame (310) is fixed to the inner ring of the lower circular ring (33), and the inner screw frame (310) is threadedly sleeved on the surface of the lower thread layer (39) of the single tube layer (34).

9. The drillable plugging pipe according to claim 8, characterized in that: A swivel (35) is rotatably mounted on the outer surface of the single tube layer (34) via a bearing, and the storage end of the second telescopic column (5) is fixed on the swivel (35).

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