37results about How to "Good plugging effect" patented technology

The utility model discloses a quick leaking stoppage device for a fire hose, which comprises a second connecting fastener, the second connecting fastener is arranged on one side of a first connecting fastener, the cross section of the first connecting fastener and the cross section of the second connecting fastener are arc-shaped, the first connecting fastener is provided with a threaded hole, and the second connecting fastener is provided with a threaded hole. A connecting bolt is arranged on one side of the second connecting fastener, and the connecting bolt and the second connecting fastener are arranged in a penetrating mode. The air bag is arranged on the inner side of the first connecting fastener and the inner side of the second connecting fastener, an inflation and deflation nozzle is arranged outside the first connecting fastener and the second connecting fastener, the inflation and deflation nozzle, the first connecting fastener and the second connecting fastener are connected into a whole, and the inflation and deflation nozzle communicates with the air bag. The leaking stoppage device is arranged outside the fire hose in a sleeving mode, air is injected into the air bag, the air bag is opened by facing the injected air, the opened air bag makes close contact with the water leakage position of the fire hose, a damaged opening of the fire hose is blocked, and rapid leaking stoppage of the fire hose is achieved.

The utility model discloses an inserting device of a ton barrel metal frame, which belongs to the field of ton barrel frame processing, and comprises a working table, a pipe pitch adjusting mechanism is arranged on the top surface of the working table, and the pipe pitch adjusting mechanism comprises a hydraulic cylinder fixedly connected to the top surface of the working table. The hydraulic cylinder is fixedly connected with one side of the fixing plate, the telescopic end of the hydraulic cylinder is fixedly connected with a movable sliding rail, an inner groove of the movable sliding rail is slidably connected with a plurality of limiting blocks, a plurality of limiting grooves are formed in the top end of the fixing plate in a penetrating mode, and the limiting blocks are slidably connected with the limiting grooves respectively. The ends, away from the movable sliding rails, of the limiting blocks are fixedly connected with telescopic rods, the sides, away from the movable sliding rails, of the telescopic rods are fixedly connected with mounting frames, and the functions of rapidly adjusting the distance between the steel pipes and improving the equipment inserting effect can be achieved.

The invention provides a composite gel fire preventing and extinguishing material for coal seam fire treatment and a preparation method. The composite gel fire preventing and extinguishing material comprises a first base material, a second base material, a solvent, a colloid material and an auxiliary agent, wherein in parts by weight, the first base material is 270-540 parts, the second base material is 90-180 parts, the colloid material is 15-30 parts, and the auxiliary agent is 30-60 parts; the mass ratio of the first base material to the solvent is 2: 5. The CO inhibition rate of the composite gel fire preventing and extinguishing material is good, moisture is rapidly vaporized at high temperature when part of the composite gel fire preventing and extinguishing material is not gelatinized, the surface temperature of a coal seam can be rapidly reduced, and dehydrated residual solids form an isolation layer to prevent coal oxygen contact; part of the composite gel fire preventing and extinguishing material enters a high-temperature area in a coal seam fire source through coal seam cracks, oxygen is isolated, coal is oxidized, and the exothermic reaction is terminated. The invention further provides a preparation method of the material. The preparation process is simple and low in process cost.

The utility model discloses a glue injection type large valve leaking stoppage device, and relates to the technical field of glue injection type large valves, the glue injection type large valve leaking stoppage device comprises a leaking stoppage device body, the leaking stoppage device body is suitable for being used for glue injection and leaking stoppage of a valve, the leaking stoppage device body comprises a leaking stoppage cylinder, and a left cylinder body is rotatably installed on the left side of the leaking stoppage cylinder; and a right cylinder body is rotationally installed on the right side of the leaking stoppage cylinder, dismounting units are arranged on the two sides of the leaking stoppage cylinder, and a sealing unit is arranged in the leaking stoppage cylinder. The rubber pad is tightly attached to the gap when the barrel body is clamped, the barrel body is clamped and extruded to promote the rubber pad to expand, the gap is further sealed, the high-pressure glue injection gun is correspondingly connected to the interior of the glue injection pipeline, leaking stoppage glue is injected into the leaking stoppage barrel, and when the leaking stoppage glue enters the leaking stoppage barrel, the leaking stoppage barrel is sealed. When the leakage stoppage barrel is used, gas in the leakage stoppage barrel is exhausted to the outside along the exhaust port, so that each gap in the leakage stoppage barrel is filled with the leakage stoppage glue, the sealing performance is improved, and the leakage stoppage comprehensiveness is further improved.

The invention relates to the technical field of pipeline leakage sealing, in particular to a quick plugging device for an underground pipeline, which comprises a fitting part for fitting the pipeline, the fitting part is arc-shaped, the fitting part corresponds to the pipeline in radian, a plugging rod is slidably connected to the fitting part, a sliding pipe is arranged on the fitting part, the plugging rod is located in the sliding pipe, and the plugging rod is connected with the sliding pipe. The end, close to the pipeline, of the leaking stoppage rod is provided with an attaching piece used for being attached to the inner wall of the pipeline. When leaking stoppage is conducted, leakage holes of different sizes can be sealed, and applicability is high.

The invention discloses a leaking stoppage simulation physical model evaluation method which comprises the following steps: acquiring a rock core; three-dimensional stress is loaded to the rock core through a true triaxial physical simulation experiment device, fracturing fluid is injected to fracture the rock core, and a needed crack is obtained; manufacturing a base plate according to the crack model, and putting the base plate into the crack; leaking stoppage slurry prepared by a leaking stoppage formula to be detected is injected into the crack with the base plate; the rock core injected with the leaking stoppage slurry is put into a true triaxial physical simulation experiment device, the true triaxial physical simulation experiment device is used for loading three-dimensional stress on the rock core, a leaking stoppage pressure-bearing curve and the leakage amount are obtained, and then the leaking stoppage effect of the leaking stoppage formula is evaluated. The stratum crack can be truly restored, the performance of the leaking stoppage formula can be evaluated more accurately, and the leaking stoppage effect of the stratum crack is effectively improved.

The invention discloses an oil field oil layer delayed heat release chemical blocking remover and a preparation method and application thereof, and relates to the field of oil field development technologies. Raw materials comprise a component A, a component B and a catalyst; the component A comprises the following raw materials in percentage by mass: 20-31% of ammonium chloride and 69-80% of water; the component B comprises the following raw materials in percentage by mass: 26-40% of sodium nitrite, 4-6% of solvent oil, 1-2% of mixed aromatic hydrocarbon, 1-2% of an emulsifier, 0.2-1.5% of a paraffin dispersant, 1-2% of a mutual solvent, 0.5-1% of alkyl sulfonic acid metal salt and 47.8-64% of water; the catalyst is monopotassium phosphate. The chemical blocking remover provided by the invention not only has excellent wax dissolving and preventing effects, but also has the characteristics of controllable reaction time and delayed heat release, can be adjusted according to site requirements, is suitable for different well depths, is convenient for site construction, and does not pollute an oil layer.

This invention relates to the field of oil drilling, specifically to a conjugated diene and a plugging gel based on the conjugated diene, and a method for preparing the same. The conjugated diene has a structure as shown in Formula I, and the plugging gel comprises a polymer obtained by monomer polymerization of the conjugated diene, alkenyl amide, and alkenyl sulfonic acid. The plugging gel based on this conjugated diene exhibits excellent resistance to dilution, temperature, salt, and calcium, making it suitable for plugging operations in high-temperature deep wells, especially in high-temperature lost circulation formations with highly mineralized water layers. Formula I

According to the technical scheme, the invention discloses a construction method for emergency repairing and leaking stoppage of a low-pressure industrial pipeline. The construction method comprises the following steps that the position, 300 mm wide, of a leakage point of the pipeline is polished cleanly in the circumference direction of the pipeline; the asbestos packing is wound around the leakage point of the pipeline and tightened, and the asbestos packing is tightened through a strap and then taken down; the glass fiber felt is wound outside the asbestos packing and the pipeline, and the middle-layer leaking stoppage material mixed liquid is brushed; the glass wool cloth is wound outside the glass fiber mat and the pipeline, the middle surface layer leaking stoppage material mixed liquid is brushed, and the middle surface layer leaking stoppage material mixed liquid is brushed after solidification. According to the method, cutting and electric welding are not needed in the repairing process, and the high-danger operation environment of medium maintenance of the combustible gas pipeline or the combustible liquid pipeline is completely avoided. And the repairing process is simple and quick, and quick and effective maintenance can be performed under the condition of normal operation of the pipeline, so that the risks of safety, economy, environment and the like caused by stopping conveying of the pipeline are avoided.

The invention provides a temporary plugging agent and a preparation method thereof. Raw materials of the temporary plugging agent comprise resin and modified particles, and raw materials of the modified particles comprise rigid particles wrapped by composite membranes and a modifier; the modifier is a mixture containing a silane coupling agent and a film-forming agent; the composite membrane is prepared from polyethyleneimine, polyallylamine hydrochloride and nano silicon dioxide. The preparation method of the temporary plugging agent comprises the following steps: sequentially immersing rigid particles into a polyallylamine hydrochloride solution, a nano silicon dioxide dispersion liquid, a polyethyleneimine solution and a nano silicon dioxide dispersion liquid, and repeating for 20-100 times to obtain rigid particles wrapped by a composite film; mixing the rigid particles wrapped by the composite film, a silane coupling agent and a film-forming agent, and heating to obtain modified particles; and mixing the modified particles with resin, and curing to obtain the temporary plugging agent. The temporary plugging agent provided by the invention has good toughness and relatively high strength, and can be used for plugging the interior of a crack through good deformability.

The invention discloses leaking stoppage slurry for a low-pressure malignant leakage stratum. The leaking stoppage slurry is prepared from water, bentonite, xanthan gum, modified walnut shells, rubber particles and lignosulfonate. According to the dispersing type leaking stoppage slurry suitable for the low-density window, the leaking stoppage material walnut shells are modified, the dispersing performance of solid-phase particles in the leaking stoppage slurry is effectively improved, and therefore a good leaking stoppage effect can be achieved only through a small amount of modified walnut shells without adding a large amount of leaking stoppage materials; the plugging agent is very suitable for stratum plugging construction of low-density windows.

The invention discloses a leaking stoppage method and structure for a leaking hole of a foundation pit support structure in a soft soil area. The method comprises the steps that the leaking hole of the foundation pit support structure is cleaned; a plugging plate is installed at the leakage hole to construct a first plugging structure for the leakage hole, and the leakage hole is sealed and plugged through the first plugging structure; quick-setting cement slurry is injected into the leakage hole through the first channel sealing structure to construct a second channel sealing structure for the leakage hole, and the leakage hole is internally filled and plugged on the inner side of the foundation pit through the second channel sealing structure; soil is backfilled in the foundation pit on the side where the leakage holes are located; punching and grouting outside the pit to construct a third blocking structure for the leakage hole, and performing external filling and leaking stoppage on the leakage hole through the third blocking structure; and backfill soil in the foundation pit is removed. The method has the advantages of being simple in leaking stoppage process, convenient to construct, high in leaking stoppage speed, short in leaking stoppage period and good in leaking stoppage effect.

The invention relates to the technical field of fiber pressure-bearing plugging, in particular to a production formula and a detection method of a fiber pressure-bearing plugging agent, and the fiber pressure-bearing plugging agent comprises the following basic components: superfine polypropylene fiber, Shuimei fiber, wild jujube shell, No.1 mica sheet, superfine calcium carbonate, rubber particles, calcium carbonate particles, soil powder and a polymer 3860. The pressure-bearing plugging agent with a spatial three-dimensional structure, which is formed by taking superfine engineering fibers as a main body and dozens of materials with different shapes and particle sizes as auxiliary materials, is simple and convenient to operate, can effectively plug serious loss of cracks of 5mm and has a remarkable plugging effect; according to the present invention, other materials with easily-infiltrated surfaces are adopted to replace sawdust and the like, and other fibers and pressure-resistant and temperature-resistant filling materials are added so as to achieve the uniform dispersion during the preparation of the plugging agent, and achieve the effects of entering, standing and not exiting in the plugging process so as to achieve the successful plugging;

The present invention discloses a water conservancy project pipeline support device provided with a joint settlement monitoring structure, belonging to the technical field of water conservancy project pipeline support devices, the present invention includes a support base plate fixedly supported above the ground, a support platform is provided above the support base plate, and a locking clamp is fixedly installed above the support platform; it also includes: a buffer mechanism installed on the upper surface of the support platform to achieve buffering during pipeline erection; a monitoring mechanism arranged between the support base plate and the support platform to achieve settlement monitoring; an elastic airbag fixedly arranged on the upper surface of the support base plate; and an auxiliary support mechanism evenly arranged on the support platform. The water conservancy project pipeline support device provided with a joint settlement monitoring structure can perform real-time settlement monitoring during use, and can automatically adjust and assist in support after settlement, and can automatically fill and drain the settlement pit to avoid further settlement.

The application discloses a coal mine underground integrated intelligent circulating leak-stopping system, which comprises a single-bag pipeline cleaning and plugging device, a two-plugging-one-injection hole sealing device and an intelligent circulating leak-stopping pump truck, two pipeline fixing sleeves are symmetrically arranged at the left and right ends of the bag of the single-bag pipeline cleaning and plugging device, the right ends of a leak-stopping pipe and a water injection cleaning pipe are connected with a leak-stopping and cleaning conversion valve, the right end outlet of the leak-stopping and cleaning conversion valve is arranged in a fissure sealing section, and the left end of the leak-stopping pipe is connected with the intelligent circulating leak-stopping pump truck. The leak-stopping and cleaning conversion valve is used for realizing the circulating operation of leak-stopping and cleaning of the fissure sealing section, timely cleaning of the leak-stopping pipe can effectively prevent the leak-stopping pipe from being blocked, the grouting leak-stopping effect is greatly improved, meanwhile, the automatic control of the circulating grouting leak-stopping is realized through the intelligent controller, the working strength is reduced, the working failure in the leak-stopping grouting work is reduced, the normal grouting leak-stopping work is ensured, and the leak-stopping effect and the leak-stopping efficiency are further improved.

The invention discloses an electric heating pulse unblocking tool, an implementation process and a special piston mechanism. The electric heating pulse unblocking tool comprises a pulse generating device, the device further comprises upstream and downstream movable unhooking type piston mechanisms. The pulse generating device is provided with a first acting end and a second acting end; the upper end and the lower end of the upstream and downstream movable unhooking type piston mechanism are connected with the first acting end and the second acting end of the pulse generating device respectively. The device is small in occupied area, simple in structure, convenient and safe to use, large in pulse pressure, easy to control and free of pollution, the maximum pressure can be borne by the barbs, the device can adapt to different reservoir conditions, the unblocking efficiency is improved through repeated pulses, and the unblocking capacity is also improved through high-temperature gas.

The utility model discloses a weep hole bolt fixing device for a round pipe culvert mold with weep holes, which relates to the field of concrete round pipe culvert production and comprises a plurality of mold reinforcing rib plates arranged on the side wall of the round pipe culvert mold, weep hole bolts arranged among the mold reinforcing rib plates, and fixing grooves formed in the upper parts of the weep hole bolts. Fixing steel plates are arranged on the upper portions of the transverse fixing steel bars on the left side and the right side of the drainage hole plug pin, through holes are formed in the two sides of each fixing steel plate, fixing bolts are arranged to penetrate through the through holes to fix the fixing steel plates to the side wall of the round pipe culvert mold, and then the transverse fixing steel bars and the drainage hole plug pin are fixed. The round pipe culvert is convenient to produce, the working efficiency is greatly improved, the quality of finished products is stable, meanwhile, the maintenance cost caused by deformation of parts is reduced, the safety is high, the structure is simple, and the use is convenient.

The invention relates to the technical field of heavy oil thermal recovery reagents, in particular to a strong emulsion system for assisting viscosity reduction and plug removal as well as a preparation method and application thereof. The strong emulsion system is prepared from the following raw materials in percentage by mass: 2%-10% of sorbitol dehydrated ester mixture, 5%-10% of 120 # solvent oil, 3%-6% of alcohol ether carboxylate, 0.5%-1.0% of ethylene glycol tert-butyl ether, 5%-10% of organic acid, 3%-6% of polybasic polycarboxylic acid, 3%-6% of villiaumite, 1%-2% of imidazoline corrosion inhibitor, 1.0%-3.0% of functional additive and 46%-76% of water. The strong emulsion system can perform deep plug removal on an underground reservoir and prevent organic acid of the strong emulsion system from being combined with heavy components in the thick oil so as to avoid formation of acid sludge, so that the plug removal effect of the strong emulsion system can be improved.

A production and preparation device and preparation method of water plugging and leak-proof material for oil production, belonging to the technical field of mixing equipment. In order to solve the problem that when large particles or agglomerates appear in the raw materials, the crushing is incomplete, which leads to reduced raw material mixing uniformity and poor leak-proof effect. The invention comprises a tank body and a plurality of legs fixedly mounted on the bottom surface of the tank body, a power assembly is fixedly mounted on the top surface of the tank body, a plurality of drive assemblies and a plurality of load-bearing assemblies are respectively fixedly mounted on the outer peripheral wall of the output end of the power assembly, a plurality of mounting frames are respectively fixedly mounted on the outer side walls of the plurality of load-bearing assemblies, a transmission assembly is arranged on the mounting frames, a plurality of meshing assemblies are slidably mounted on the inner wall of the inner cavity of the tank body, a first interception plate and a second interception plate are respectively fixedly mounted on the transmission assembly, the invention realizes the effects of crushing and grinding respectively by counterclockwise rotation and clockwise rotation, and can enhance the mixing uniformity of the raw materials during the stirring process.

The invention belongs to the technical field of thickened oil recovery, and relates to a keratin composite foam plugging agent as well as a preparation method, an injection method and application thereof. The keratin composite foam plugging agent provided by the invention comprises keratin, a foam stabilizer, a foaming agent and water. The keratin composite foam plugging agent can form plugging structural bodies with different scales to establish a multi-dimensional plugging structure, the keratin composite foam can fully play the advantages of plugging near wellbore zones by a flexible long-chain keratin system and plugging far wells by a flexible short-chain keratin system, and has the advantages of far plugging and near regulation; meanwhile, the raw material cost is low, the usage amount is small, the operation period is short, and good economic benefits are achieved.

This invention discloses a self-expanding, temperature-resistant elastomer plugging agent for drilling fluids and its preparation method. The plugging agent is composed of the following components in parts by weight: 100 parts of temperature-resistant polyolefin elastomer matrix material, 5-20 parts of polymer composite modified water-absorbing reinforcing agent, 5-15 parts of carboxylated carbon nanotube-PEG water-absorbing reinforcing agent, 5-30 parts of reinforcing material, 10-30 parts of superabsorbent resin, and 0.5-1.5 parts of anti-hydrolysis agent. The plugging agent of this invention possesses excellent elasticity and a certain degree of toughness, allowing it to be squeezed into fractures under pressure. After absorbing water, its volume expands, yet it still maintains a certain degree of elasticity and strength. Under its own elasticity, it increases friction with the fracture surface, increasing the elasticity of the entire sealing layer, preventing the plugging material from flowing back or sliding deeper into the fracture, sealing the leakage channels, and achieving effective sealing of wellbore fractures.

This invention discloses a spiral-shell type fire rescue device and method for underwater emergency disaster reduction. Dike breaches are highly dangerous, necessitating the development of simple rescue equipment operable by non-professional personnel. This invention, before a breach forms, uses water pressure to press a water-retaining plate against the upstream slope of the dike, quickly sealing leaks. By splicing multiple devices together, the equipment can be stabilized on the upstream side of the dike, forming a long, narrow rescue platform, and the water-retaining plate can be used to quickly seal the breach, increasing the rescue operation space. This invention effectively solves the problems of difficulty in locating leaks in the early stages of seepage, increasing the sealing area, and addressing the issue that a single device cannot be stabilized on the upstream side of the dike to complete the rescue task when the breach length is large, thus improving rescue efficiency.

The application discloses a water-absorbing and swelling rubber plugging agent, a plugging slurry and a plugging construction method thereof. The water-absorbing and swelling rubber plugging agent comprises the following components: water-absorbing and swelling rubber particles, multi-grade rigid plugging particles and fiber reinforced materials. The plugging slurry comprises base slurry and the water-absorbing and swelling rubber plugging agent. The plugging slurry adopts modified rubber particles with controllable swelling characteristics as a core plugging component, cooperates with multi-grade rigid particles, can form a stable self-adaptive plugging layer in a crack, effectively solves the problem of instability of the plugging layer under the respiration of the crack, and significantly improves the plugging pressure-bearing capacity and long-term plugging effect.

This utility model belongs to the field of waterproofing engineering technology, specifically a grouting and leak-sealing device for waterproofing projects. It includes a base, a grouting tank fixedly mounted on the upper surface of the base, a spraying disc fixedly mounted on the lower surface of the inner cavity of the grouting tank, multiple through holes on the lower surface of the spraying disc, a rotating shaft rotatably mounted inside the grouting tank, multiple stirring blades fixedly mounted on the surface of the rotating shaft, multiple filter holes inside the stirring blades, and multiple comb teeth fixedly mounted on the upper and lower surfaces of the stirring blades. A conveying head is located at the bottom of the inner cavity of the grouting tank, and multiple through grooves are formed on the end face of the conveying head. Through the spraying disc, stirring blades, filter holes, comb teeth, and conveying head, air bubbles generated in the mortar can be removed during mortar preparation, preventing air bubbles from clogging the grouting pipe, reducing mortar adhesion, thereby improving mortar quality and effectively enhancing the grouting and leak-sealing effect.

The present invention relates to an aluminum profile extrusion forming traction device with a supporting function, comprising a traction device body, a support plate fixedly installed inside the traction device body, a positioning plate slidably connected to the right side of the top of the support plate, a circular plug-in slot provided on the left side of the top of the positioning plate, and circular grooves provided on the front and rear sides of the inner wall of the circular plug-in slot. The invention solves the problem of poor existing supporting effect by providing a traction device body, a support plate, a positioning plate, a circular plug-in slot, a circular groove, a circular cavity, a bar through hole, a threaded through hole, an extrusion device, a threaded rod, a rotating handle, a connecting block, an extrusion block, a circular plug-in block, a circular placement slot, a positioning mechanism, an extrusion spring, a circular stopper, a circular positioning block, a rotating rod, a threaded matching hole, a limit slot and a limit block. The aluminum profile extrusion forming traction device with a supporting function has the advantage of better supporting effect.

The utility model discloses a fire-fighting pipeline leaking stoppage device which comprises a leaking stoppage plate arranged on one side of a fire-fighting pipeline, the outer walls of the two ends of the leaking stoppage plate are each provided with an open groove, the number of the open grooves is two, connecting hoops are arranged in the two open grooves, the connecting hoops are arranged in a U shape, and the connecting hoops are connected with the leaking stoppage plate. Two connecting plates are arranged on the other side of the fire-fighting pipeline; the two connecting plates are arranged on one side of the connecting hoop, the two screws are arranged on one side of the connecting hoop, connecting holes are formed in the two ends of the two connecting plates, nuts are arranged on one sides of the two connecting plates, and the nuts are in threaded connection with the screws. The leaking stoppage plate and the fire-fighting pipeline are tightly attached to block the water leakage position, leaking stoppage of the fire-fighting pipeline is achieved, media do not need to be closed during leaking stoppage, fire-fighting operation in emergency cannot be affected, and the using effect of the leaking stoppage device is improved.

The invention relates to the field of drilling in the petroleum industry, and discloses a gel polymer, a preparation method and application thereof, and a water-based drilling fluid. The polymer contains a structural unit A, a structural unit B, a structural unit C and a structural unit D, the structural unit A is a structural unit with a structure as shown in a formula (1); the structural unit B is a structural unit with a structure as shown in a formula (2); the structural unit C is a structural unit with a structure as shown in a formula (3); the structural unit D is a structural unit with a structure as shown in a formula (4). The gel polymer provided by the invention can realize temperature-responsive expansion, and after the gel polymer is applied to the drilling fluid, the plugging effect and aging performance of the drilling fluid on macropores can be effectively improved. # imgabs0 #

The invention provides a long-distance pipe-jacking local repairing device and a repairing construction method, and relates to the technical field of pipe jacking. The long-distance pipe-jacking local repairing device comprises a base, a supporting plate and an abutting strip; the cross section of the base is in an arc shape tightly attached to the inner wall of a jacking pipe, a hinge seat is fixedly arranged in the middle of the base, a cross rod is horizontally and fixedly arranged at the top of the hinge seat in a penetrating mode, hydraulic cylinders are arranged at the two ends of the cross rod, and a control structure for controlling the hydraulic cylinders to coaxially rotate along the cross rod is arranged on the cross rod. The free end of a hydraulic rod of the hydraulic cylinder is fixedly connected with the supporting plate, connecting rods are fixed to the two sides of the top face of the supporting plate, the connecting rods on the two sides are fixedly connected with abutting strips respectively, and the abutting strips are in an arc shape matched with the inner wall of the jacking pipe. The problem that the sealing performance of a pipeline is lost when special conditions such as local leakage occur in the pipeline is solved.