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111results about How to "Improve plugging efficiency" patented technology

Multi-cluster interlayer / in-crack temporary plugging diversion fracturing process and product preparation method

The invention discloses a multi-cluster interlayer / in-fracture temporary plugging diversion fracturing process and a product preparation method, and particularly relates to the technical field of petroleum and natural gas exploitation, the fracturing process comprises the steps of dividing fracturing sections according to the physical property of a horizontal section reservoir of a coal-bed gas well, monitoring and automatically adjusting parameters during drifting, injecting prepad fluid to form a main fracture, and injecting sand adding fluid in a stepped mode. Preparing and injecting a temporary plugging material, injecting prepad fluid again to form a new crack, injecting sand-adding fluid into the new crack, replacing the sand-carrying fluid with clear water after fracturing, discharging the fluid and monitoring. The preparation method of the temporary plugging material comprises the steps of raw material mixing, extrusion granulation, drying, secondary extrusion granulation and the like, and the performance of the temporary plugging material is ensured through the measures of a specially designed screw structure, accurate control of temperature and humidity, addition of an auxiliary agent and the like. According to the method, the longitudinal crack coverage rate and the oil and gas recovery rate are increased, accurate control is achieved, the formation damage rate and the accident rate are reduced, it is ensured that the quality of the temporary plugging material is stable, and the formation permeability recovery rate is increased.
Owner:SHAANXI ZHONGLI HECHUANG ENERGY TECH CO LTD

Rapid plugging device and plugging method used after collapse extraction

The invention discloses a rapid plugging device used after collapse lifting and a plugging method. The rapid plugging device comprises a plurality of frames which are connected with one another. Each single face of each single frame comprises an upper chord, a lower chord, vertical rods and inclined rods, the vertical rods connect the two ends of the upper chord and the two ends of the lower chord to form a frame-shaped structure, the inclined rods are obliquely connected into the frame-shaped structure, the four single faces serve as side faces and are perpendicularly welded to one another to form a cube structure, and iron gauzes are welded to the peripheries of the four side faces. The end parts of the upper and lower chord members are welded with female and male joints for transverse connection, and the top and bottom parts of the upper and lower chord members are provided with screw holes for vertical connection. According to the method, the water flow speed of the breach can be effectively reduced, and good construction conditions are provided for follow-up blocking and reinforcing of the burst embankment.
Owner:CCCC SECOND HARBOR ENGINEERING CO LTD

Thrombus aspiration catheter and thrombus treatment device

The utility model is suitable for the technical field of medical equipment, and provides a thrombus aspiration catheter and a thrombus treatment device. The thrombus aspiration catheter comprises a first catheter body and a second catheter body, two connectors are arranged at the first end of the first catheter body, and one end of the second catheter body is connected with any connector of the first catheter body. The second end of the first catheter is used for being connected to a negative pressure device. The first guide pipe and the second guide pipe are connected through threads. The thrombus suction catheter further comprises a sealing cover used for sealing any connector of the first catheter. A pressure gauge is further arranged on the first guide pipe and used for measuring the negative pressure in the first guide pipe. The two connectors are arranged on the first catheter, so that when the second catheter is prevented from being blocked and replaced, the second catheter can be quickly replaced and used, and the thrombus suction efficiency is higher.
Owner:FUNAN COUNTY PEOPLES HOSPITAL

Fraud-related domain name blocking method, device, system and equipment

The invention relates to a fraud-related domain name blocking method, device, system and equipment, and the system comprises a fraud-related blocking server which is used for receiving a blocking instruction and generating a domain name blacklist based on the blocking instruction; the flow detection server is used for acquiring a DNS request sent by a terminal and sending a mirror DNS message to the fraud-related plugging server based on the DNS request; and the fraud-related plugging server is also used for receiving the mirror image DNS message sent by the flow detection server, judging whether the mirror image DNS message is a fraud-related domain name based on the domain name blacklist, and obtaining a domain name resolution result corresponding to the DNS request. According to the method, the independent fraud-related plugging server is arranged, and the mirror DNS message is detected through the fraud-related plugging server, so that the problems that a block of cache needs to be occupied independently through local DNS plugging, and the buffer performance and the normal perception of a user are reduced along with the increase of the plugging amount can be avoided; and the blocking efficiency of fraud-related domain names can be improved to a great extent.
Owner:INNER MONGOLIA MOBILE +1

Rapid leaking stoppage method for dike breach

The invention provides a rapid leaking stoppage method for a dike breach, and relates to the technical field of hydraulic engineering, and the rapid leaking stoppage method comprises the following steps: S1, breach fixing: fixing two ends of the breach by using steel sheet piles and steel pipe columns capable of bearing corresponding water pressure at stable positions of edges of two ends of the breach; s2, pipe bodies are laid, specifically, a plurality of pipe bodies are laid from the two ends of the dike breach in the direction perpendicular to the dike; s3, piling is conducted on the side, away from the river channel, of the pipe body along the edge of a pipe opening of the laid pipe body; s4, the pipe body is blocked, and a corresponding blocking material is selected to block a pipe opening of the pipe body; s5, a rockfill dam is built, and after sundries and soft soil on the outer side of the crevasse are cleaned, the rockfill dam is laid on the outer side of the pipe body in the crevasse; through rapid throwing and stacking of the steel sheet piles, the steel pipe piles and the pipe bodies, the crevasse with the large water level difference can be preliminarily blocked within a short time, and the crevasse is adjusted and reinforced through subsequent reinforcing measures.
Owner:吴文俊

Dike breach rapid plugging device based on pile body truss structure form

The invention relates to the technical field of hydraulic engineering and flood control, in particular to a rapid dike breach plugging device based on a pile truss structural form, which comprises four mounting rods, one side of each mounting rod is connected with three connecting rods, the other side of each mounting rod is connected with a stabilizing frame, the outer side of each stabilizing frame is provided with a T-shaped groove, and each T-shaped groove is provided with a T-shaped groove. The connecting rods can be spliced with the corresponding T-shaped grooves in a clamped mode, plug pin blocks are installed on the upper portions of the mounting rods, and counter bore blocks are connected to the lower portions of the mounting rods. Through modular design, the mounting rods, the connecting rods, the plug pin blocks and the counter bore blocks are quickly clamped and spliced, assembling can be completed in a short time, the breach plugging efficiency is remarkably improved, the stability of the structure is further enhanced through cooperation of the stabilizing frame, the fixing piece and the locking disc, and the practicability is high. And it is ensured that the device can still be rapidly deployed and play a role in a complex environment.
Owner:CHINESE PEOPLES ARMED POLICE FORCE JIANGXI HYDRO POWER NO 2 GENERAL GRP +1

Quick plugging method for condenser based on sulfydryl-isocyanate click reaction

The embodiment of the invention provides a quick plugging method for a condenser based on a sulfydryl-isocyanate click reaction, which comprises the following steps: firstly, preparing a mixture containing sulfydryl and an isocyanate group, and adding a catalyst to obtain a plugging agent for plugging heat exchange of the condenser. When leaking stoppage is needed, the leaking stoppage agent is added into a condenser heat exchange pipe, and the quick leaking stoppage effect can be achieved under the dual catalytic action of the catalyst and water vapor in the heat exchange pipe. According to the rapid leaking stoppage method, the leaking stoppage agent is easy to prepare, the leaking stoppage process is rapid, the rapid leaking stoppage method can adapt to various heat exchange tube sizes and different surface cleanliness, and due to existence of water vapor in the heat exchange tubes, the mixture curing leaking stoppage process can be accelerated. According to the method, leaking stoppage is carried out based on the click chemical reaction, the defects of a traditional physical leaking stoppage technology are overcome, and the leaking stoppage working efficiency and the leaking stoppage effect are improved.
Owner:XIAN THERMAL POWER RES INST CO LTD

Blockage clearing device convenient for pipeline blockage of evaporation crystallizer

The utility model relates to the technical field of pipeline cleaning, in particular to a pipeline blockage clearing device convenient for an evaporating crystallizer, which is characterized in that a liquid passing pipe is movably arranged in a liquid outlet cylinder in a penetrating manner, two partition plates are fixedly arranged in the liquid passing pipe, and a plurality of liquid passing openings are formed in the outer ring wall of the liquid passing pipe and positioned on the upper side and the lower side of the upper partition plate; the conical head is arranged at the lower end of the liquid passing pipe in a screwed and sleeved mode through a sealing bearing, a plurality of first liquid outlet holes communicated with the second liquid passing groove are formed in the side wall of the conical head, and a plurality of second liquid outlet holes communicated with the second liquid passing groove are formed in the position, located above the lower partition plate, of the outer ring wall of the liquid passing pipe. The motor is fixedly arranged on the inner bottom wall of the liquid passing pipe, an output shaft of the motor movably penetrates through the bottom wall of the liquid passing pipe and then is connected with the conical head, blocking objects attached to the inner wall of a pipeline can be scoured through impact of water flow, stubborn blocking objects in the pipeline can be broken, pipeline dredging is achieved, and the blocking removing efficiency is improved.
Owner:TIANJIN TRICO ENVIRONMENT CO LTD

A novel online material handling and blockage clearing device

ActiveCN224618928UClear blockageImproved single-time blockage clearing efficiency
This utility model discloses a novel online material handling and unblocking device, relating to the field of unblocking technology. It includes: a telescopic device; an hydraulic control device for controlling the telescopic movement of the telescopic device; and a pushing device connected to the end of the telescopic device for unblocking materials. This unblocking device utilizes the cooperation between the telescopic device and the pushing device. The hydraulic control device controls the telescopic movement of the telescopic device, causing the extension of the hydraulic cylinder to drive the linear movement of the pushing device. This pushes the accumulated material through the unblocking plate, thus unblocking the material and improving the efficiency of unblocking per cycle. After installing the fixed bracket inside the equipment, remote control can be achieved through the cooperation between the telescopic device and the hydraulic control device, fundamentally avoiding accidents such as material splashing and crushing during manual tapping.
Owner:SHANDONG JUZHOU CEMENT CO LTD

A kind of air chute is used to clear the device of blocking

The application discloses a kind of air chute with unblocking device, tank is set in the top of rack, the inside of tank is provided with sieve plate, feed pipe is connected with the high end of tank, discharge pipe is connected with the low end of tank;Multiple air pipes input end are communicated with fan, its output end passes through tank, and is abutted with sieve plate part;Sieve plate is provided with multiple rotating rods, multiple rotating rods are rotatably connected with cover plate, the working end surface of vibration component is abutted with the circumference of tank.This application material enters the high end of tank by feed pipe, and penetrates downward along tank and sieve plate sieve hole under the action of gravity.The fan transports compressed air to sieve plate bottom by air pipe, so that material fluidization is promoted, and material sliding to discharge pipe is discharged.Gas flow impact sieve hole removes blocked particles, and air pipe output end abuts sieve plate bottom to improve unblocking efficiency.Vibration component makes tank slightly vibrate, and loosens blockage.Cover plate is locally turned over under air flow or vibration, and disturbance blockage promotes its drop, and reduces manual cleaning frequency.
Owner:SHAANXI BAINENG IND TECH CO LTD

Coralline polymer microsphere as well as preparation method and application thereof

ActiveCN119219837AHigh water expansion rateImprove stabilityDrilling compositionPolymer scienceMicrosphere
The invention belongs to the field of petrochemical engineering, and particularly relates to coralline polymer microspheres as well as a preparation method and application thereof. Polymer microspheres are prepared by adopting an inverse emulsion polymerization method, and polymerization is initiated in a water-in-oil reaction system through sulfhydrylation PAMAM loaded with metal copper quantum dots and an azo initiator. According to the preparation method, firstly, the water phase is dropwise added into the oil phase to form the emulsion, then the sulfhydrylation PAMAM loaded with the metal copper quantum dots is added, the sulfhydrylation PAMAM is easily dispersed at the interface of the two phases, and the azo initiator is more easily dispersed in the organic phase. A polymer core initiated by the metal copper quantum dots and a polymer shell initiated by the azo initiator continuously grow, an interactive coralline structure is finally formed on the surface of the microsphere, the interactive structure can effectively disperse expansion stress and avoid the expansion fracture phenomenon after water absorption, the interaction force between the expanded microspheres is enhanced, and the water absorption performance of the microsphere is improved. And the plugging oil displacement effect is better.
Owner:SUZHOU CHUXIN MOYI TECH CO LTD

Concrete small hole plugging gun

The utility model provides a concrete small hole plugging gun which comprises a slurry pipe barrel and a gun rack. Wherein the slurry pipe barrel comprises a barrel body and a plugging nozzle; the two ends of the barrel are of an open structure, one end of the barrel is used for being filled with concrete slurry and connected with the plugging nozzle, and the other end of the barrel is connected with the gun rack. The gun rack comprises a handle, a pipe barrel groove, a force return device and a push rod; the handle drives the push rod to move in the direction of the pipe barrel groove. The return device is used for fixing the position of the push rod; a rubber plug is arranged at the end, close to the pipe barrel groove, of the push rod. And the rubber plug is movably connected with the slurry pipe barrel. By the adoption of the concrete small hole plugging gun, labor is saved, the discharge amount of slurry can be effectively controlled, waste of raw materials is avoided, labor of workers is effectively saved, and plugging quality and plugging efficiency are improved.
Owner:MCC COMM CONSTR GRP CO LTD

Valve pressure testing device

The utility model belongs to the technical field of valve detection, and particularly discloses a valve pressure testing device which comprises a base, a fixing plate and a limiting piece are arranged on the base, and a driving shaft is arranged between the fixing plate and the limiting piece. The movable plate is arranged on the driving shaft, a driving mechanism is arranged on the movable plate, and the driving mechanism can drive the movable plate to be close to or away from the fixed plate in the axial direction of the driving shaft; the blocking mechanism is arranged on the opposite side walls of the fixed plate and the movable plate, the blocking mechanism comprises an adjusting assembly and a blind plate, and the adjusting assembly is used for adjusting the position of the blind plate to correspond to the valve; and the placing mechanism is arranged between the movable plate and the fixed plate and is used for adjusting the direction and the position of the valve. According to the utility model, through the arrangement of the driving mechanism and the adjusting assembly, the centering of the blind plate and the valve can be conveniently realized, and meanwhile, a low-in high-out water inlet mode is adopted for detection, so that the pressurization time during detection is greatly shortened, and the detection efficiency of the valve is effectively improved.
Owner:CHONGQING CHUANYI CONTROL VALVE

Water and fertilizer integrated mixing and irrigation device

The application relates to a water and fertilizer integrated mixing and irrigation device and belongs to the technical field of irrigation devices, which comprises a main body, a plurality of supporting legs fixedly connected to the bottom of the main body, a water storage cavity arranged in the inside of the main body, a water inlet pipe arranged on one side of the top of the main body and communicated with the water storage cavity, a drainage pipe arranged on the bottom of one side of the main body and communicated with the water storage cavity, a second valve body arranged on the drainage pipe, a storage cavity arranged on one side of the inside of the main body, a water conveying mechanism arranged on the top of the main body and capable of conveying water in the water storage cavity into the storage cavity. The water pump electric device can realize the mixing of the fertilizer and water and the irrigation work, the device cost is saved, the operation is simpler, the two different modes can be freely switched by controlling the opening of the spraying pipe, the complicated switching operation is not needed, the rapid mixing effect can be realized by utilizing the circulating flow of the water, and the mixing effect is good.
Owner:BEIJING SHUANGTONG HUIHE AGRICULTURAL TECHNOLOGY DEVELOPMENT CO LTD

An intelligent design method for pressure-containing plugging system in ultra-deep fractured reservoirs

The present invention discloses an intelligent design method for a pressure-bearing plugging system for an ultra-deep fractured reservoir, and belongs to the technical field of leakage control. The present invention includes establishing a high-precision plugging formula prediction model based on machine learning and multi-task learning, and then establishing a plugging formula characteristic parameter screening mathematical model with pressure bearing capacity and cumulative leakage as objective functions, obtaining the plugging formula characteristic parameters by solving the mathematical model, and finally matching the plugging materials according to the characteristic parameters, thereby determining the plugging formula. The present invention designs the plugging formula based on machine learning, which helps to improve the accuracy and speed of decision-making. The designed plugging formula has a high one-time plugging success rate, rapid response, and convenient operation. It can improve the plugging efficiency of drilling fluid leakage during drilling and reduce the time cost and economic loss caused by well leakage. At the same time, the prediction model of the present invention takes into account the influence of crack width on the plugging effect, and has strong adaptability and a wide range of applications.
Owner:SOUTHWEST PETROLEUM UNIV

A plugging agent for carbon dioxide gas drive well and preparation method thereof

The present invention proposes a plugging agent for a carbon dioxide gas drive well and a preparation method thereof, and relates to the field of oil production. By weight, the following raw materials are included: 20-30 parts of oil well cement, 10-15 parts of nano calcium carbonate, 1-5 parts of modified silicon dioxide, 1-5 parts of water reducer, 5-10 parts of modified montmorillonite, and 1-5 parts of porous magnesium oxide particles. After the nano calcium carbonate, modified silicon dioxide, water reducer, modified montmorillonite and porous magnesium oxide particles are mixed evenly, the oil well cement is added and mixed evenly. The plugging agent has high strength after curing, good sealing performance with the plugging place, and is not easy to cause secondary leakage.
Owner:KARAMAY HONGDU

Emergency treatment device for dangerous chemical leakage

The utility model relates to the technical field of dangerous chemicals, in particular to an emergency treatment device for dangerous chemical leakage, which comprises a container barrel, an arc-shaped baffle is slidably mounted on the circumferential surface of the container barrel, an arc-shaped plate is slidably mounted in the arc-shaped baffle, and a first air bag is fixedly mounted on the circumferential surface of the inner side of the arc-shaped plate; an adjusting rod is rotationally mounted on the circumferential surface of the outer side of the arc-shaped plate; a cavity column is fixedly installed in the adjusting rod, and the left end of the cavity column is located on the outer side of the adjusting rod and penetrates through the arc-shaped plate and the first air bag. A moving ring is slidably mounted at the left end of the interior of the cavity column, a plurality of U-shaped grooves are evenly formed in the left end of the moving ring, and rotating plates are rotatably mounted in the U-shaped grooves. And the interior of the container barrel can be plugged under the action of structures such as a rotating plate and a second air bag, internal and external dual plugging is achieved, and the plugging efficiency of the device is effectively improved by achieving the dual-layer plugging sealing effect.
Owner:JINING XINCHUANG MINGDE CHEMICAL CO LTD

A gob coal bed gas rapid plugging device

ActiveCN224413702UImprove the blocking effectSolidification effectThermodynamicsCoalbed methane
The utility model discloses a kind of gob coalbed methane rapid plugging devices, it is related to gas layer plugging technical field, including directional drilling rig and mixing box, mixing box is used to store filling material, support frame carries out stirring to filling material in mixing box, improve the injection efficiency of filling material, improve the plugging speed to gas layer, and support frame quantitative injection retarder or accelerator in mixing box changes the coagulation speed of filling material, improve the plugging effect to gas layer, while the filling material in mixing box is stirred, the inside wall of mixing box is scraped, avoid that filling material sticks in the inside wall of mixing box, the utility model improves the speed and efficiency of plugging to gas layer.
Owner:RECEPTION OFFICE OF THE FIRST EXPLORATION BUREAU OF CHINA GENERAL ADMINISTRATION OF COAL GEOLOGY

Charge detection optimized and improved ash bucket anti-blocking heat-tracing-free system

ActiveCN224184988UDynamically adjust output intensityAccurately enhance beam currentLarge containersThermodynamicsDistributed control system
The utility model provides a charge detection optimized and improved ash bucket anti-blocking heat-tracing-free system, which comprises an ash bucket, a special nano ceramic material coating coated on the inner wall of the ash bucket, a fluidization air pipeline arranged at a position close to the bottom of the ash bucket, an anti-blocking device arranged at an inlet of the fluidization air pipeline, and a charge quantity detection sensor group arranged on the inner wall of the ash bucket, the charge quantity detection sensor group is electrically connected with the distributed control system, and the outer wall of the ash bucket is provided with a blockage clearing device. The system provided by the utility model eliminates detection dead angles, the sensors collect data in real time through the distributed control system, output of the anti-blocking device is dynamically adjusted, the dust dispersing effect is improved, and the system has the advantages of being comprehensive in detection, accurate in control, low in energy consumption, long in service life and the like.
Owner:SHENHUA GUOHUA JIUJIANG POWER GENERATION CO LTD +1

Paste filling method for end slope mining roadway

PendingCN119266900AImprove plugging efficiencyReduce plugging costsMaterial fill-upPipeline transportPipe routing
The invention provides a paste filling method for an end slope mining roadway. The paste filling method comprises the steps that filling pipeline arrangement information is obtained; the inner diameter Rin of a filling pipe used by the filling pipeline is obtained, and the outer diameter Rout of the filling pipe is determined based on the Rin and the pumping pressure of a filling pump of the filling paste conveying equipment; on the basis of the Rin and the Rout, needed filling pipes are selected and connected to form corresponding filling pipelines, and the outer sides of the filling pipes needing to be laid in the mining tunnel are wrapped with pipeline floating devices; the automatic pipe distribution equipment is controlled to convey the filling pipeline needing to be laid in the mining tunnel to the corresponding position of the mining tunnel; a detachable mining tunnel end plugging device is adopted to plug an outlet of the mining tunnel; and the filling paste conveying equipment is controlled to convey the filling paste to the filling pipeline. According to the invention, automatic filling of the mining tunnel can be realized.
Owner:XUZHOU CUMT BACKFILL TECH

A water drainage and plugging structure and method for high-temperature bedrock cracks in foundation pits

The present invention discloses a water drainage and plugging structure for high-temperature bedrock cracks in a foundation pit, which relates to the field of construction engineering, including a spring and a sump, the spring and the sump are connected by a drainage ditch, and two sump wells are arranged side by side at the bottom of the sump. The present invention also discloses a water drainage and plugging method for high-temperature bedrock cracks in a foundation pit, including the following parts: A, spring part; B, drainage ditch part; C, sump well part and D, plugging of water outlet; by adopting the combination of graded crushed stone, reinforced concrete, non-woven fabric, finished iron bucket and waterproof airbag to form a plugging structure, the water outlet can be quickly and perfectly plugged. The present invention blocks the spring, drainage ditch and sump by combining graded crushed stone, non-woven fabric and reinforced concrete, then forms a sump well by combining the finished iron bucket with concrete, and plugs the sump well by rubber water-stop airbag, reinforced concrete and steel plate layer, thereby improving the plugging efficiency of the present invention.
Owner:ZHUHAI SHIZIMEN CENT BUSINESS DISTRICT CONSTR HLDG

Evaluation method for crack plugging effect of polymer gel plugging agent based on storage modulus

The invention provides a method for evaluating the crack plugging effect of a polymer gel plugging agent based on storage modulus, and belongs to the technical field of drilling fluid plugging. According to the evaluation method disclosed by the invention, the energy storage modulus of the polymer gel plugging agent is combined with the maximum pumping pressure, the crack filling degree, the plugging pressure and other crack plugging effects for evaluation, so that the performances of the polymer gel plugging agent, including mechanical properties and plugging capacity, can be comprehensively known; the plugging effect of the polymer gel plugging agent on a specific stratum structure can be systematically evaluated. The matching relation between the energy storage modulus of the polymer gel plugging agent and the crack plugging effect of the polymer gel plugging agent is determined, the specific crack plugging effect of the polymer gel plugging agent can be efficiently predicted by simply testing the energy storage modulus of a specific polymer gel plugging agent solution, the performance evaluation process is simplified, and the method is suitable for popularization and application. Guidance is provided for design of the plugging agent, and the polymer gel plugging agent suitable for specific crack plugging requirements can be better selected.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

An electric pulse unblocking device and a multi-stage continuous liquid-electric pulse unblocking device

The present invention discloses an electric pulse unblocking device and a multi-stage continuous liquid-electric pulse unblocking equipment, the device comprising a shell, the shell comprising a controller, an energy storage capacitor, a vacuum trigger device and a positive electrode column connected in sequence through a steel pipe cable, and a negative electrode column is correspondingly arranged below the positive electrode column. The positive and negative electrode columns are fixed in the shell by insulating materials, and a cavity is formed between the insulating materials for storing liquid. The shell is provided with perforations at the cavity position for liquid to enter and exit the cavity. The device comprises more than two electric pulse unblocking devices. The device of the present invention integrates a pulse generator, and has a simple, compact and complete structure. The single energy release of the liquid-electric pulse unblocking device can be changed by setting different parameters of the controller; the device of the present invention can realize multi-stage pulse discharge, form a multi-dimensional unblocking area, and also adapt to a variety of underground environments.
Owner:CHINA UNIV OF GEOSCIENCES (BEIJING)

Electric heating pulse plug removal tool, implementation process and special piston mechanism

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.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Intermittent upper cover structure

The utility model belongs to the field of mechanical equipment, and discloses an intermittent upper cover structure which comprises a first connecting platform used for fixing a first driving structure. The first driving structure comprises an air cylinder, the air cylinder is fixedly connected with the first connecting platform, and a pressing rod for applying pressure to the bottle opening blocking structure is coaxially arranged in the air cylinder; a through hole corresponding to the pressing rod in position is formed in the first connecting platform, and the pressing rod can move up and down in the through hole; the first connecting platform is further provided with a connecting supporting column, the bottom of the connecting supporting column is connected with a connecting plate with an opening, and the opening is used for releasing the bottle opening blocking structure. The air cylinder drives the pressing rod to move downwards, the bottle opening blocking structure located at the opening of the connecting plate is pressed on a bottle, blocking of the bottle opening is achieved, the blocking efficiency is high, the structure is simple, and the production cost is low.
Owner:SHANGHAI TOFFLON SCI & TECH CO LTD

Water-based modified composite nano plugging agent and preparation method thereof

The invention discloses a water-based modified composite nano plugging agent and a preparation method thereof, and belongs to the technical field of oil field drilling. Adding a surfactant and an emulsifier into an organic solvent to obtain an emulsion, slowly dropwise adding the nano-iron solution into the emulsion, heating and stirring for reaction to obtain an iron-based nano-emulsion; adding nano silicon dioxide into the iron-based nano emulsion, performing ultrasonic treatment, stirring, centrifuging and drying to obtain composite nano particles; and dispersing the composite nanoparticles and a silane coupling agent in an organic solvent, adding polyaminobenzene, alkyl polyaldehyde and formic acid, carrying out a heating reflux reaction in a protective atmosphere, then adding polyaminoalkane, continuing the reflux reaction, spin-drying a reaction solution, and sequentially washing, filtering and drying to obtain the modified composite nano plugging agent. The plugging agent is small in particle size, uniform in distribution, capable of plugging small gaps, good in soil adsorbability, high in salt-resistant stability, capable of adapting to various drilling fluids, free of leakage of the drilling fluids and capable of improving the plugging efficiency.
Owner:JINAN YAGE NEW MATERIAL TECH CO LTD

Oil-based drilling fluid plugging agent and its preparation method

This invention relates to an oil-based drilling fluid plugging agent and its preparation method, comprising granular materials made of the following components by weight percentage: asphalt powder: 15-28 wt%; organic clay: 6-16 wt%; rock fiber: 25-40 wt%; nano-SiO2: 5-12 wt%; sepiolite: 8-15 wt%; elastic graphite: 8-18 wt%; and polyurethane (TPU) powder particles: 10-20 wt%. This invention features good compatibility, high efficiency, and excellent plugging effect. It can repair formation defects in the wellbore, prevent wellbore leakage, enhance the retention and plugging effect of oil-based drilling fluid in formation microfractures, improve wellbore stability, and effectively plug and strengthen the wellbore.
Owner:SINOPEC OILFIELD SERVICE CORPORATION +2

Airborne pipeline plugging equipment

The utility model discloses airborne pipeline plugging equipment, which belongs to the technical field of airborne pipelines and comprises an airborne pipeline body, a connecting frame is movably clamped on the outer surface of the airborne pipeline body, a transmission component is arranged in the airborne pipeline body, and a fixing component is movably connected through the transmission component. A driving motor drives a second bevel gear to rotate, so that a first rotating shaft drives a second gear to rotate, the second bevel gear drives a third bevel gear to rotate in the rotating process and then further drives the first bevel gear to rotate, and a second rotating shaft drives the first gear to rotate; the first gear and the second gear drive the first rotary support and the second rotary support which are connected in a meshed mode in the rotating process to stretch towards the two sides under the cooperation of the sliding groove and the sliding block so as to fix the onboard pipeline body, and gas in the gas pump enters the gas bag through the gas pipe. And the airborne pipeline body is gradually filled with the air bag to complete plugging of the airborne pipeline body, equipment can be stably fixed to the airborne pipeline, and the plugging efficiency is improved.
Owner:GUANGZHOU UUDS AERO SERVICES CO LTD