81results about How to "Sealed firmly" patented technology

The invention discloses a resin type nanoparticle latex blocking agent for drilling fluids. The blocking agent comprises raw materials in parts by weight as follows: 20 parts of alkenyl benzene, 15 parts of acrylate, 1 part of acrylates and 10 parts of hard inorganic materials, wherein the mass ratio of short-chain monomers to long-chain monomers in acrylate monomers is 3:1. The blocking agent is a composite product of the inorganic materials and organic materials, combines the hard materials with soft materials, has a higher blocking rate and is wide in particle size distribution and wider in application range; the rheological property of the drilling fluids are seldom influenced after the blocking agent is added to the drilling fluids, the blocking capacity of the drilling fluids can be remarkably improved, and the filter loss of the drilling fluids is reduced.

The invention relates to a method for sealing carbon dioxide by inorganic solid waste ceramsite mineralized concrete, which comprises the following steps: preparing inorganic solid waste ceramsite filter balls; preparing an aminated ceramsite filter ball; after the aminated ceramsite filter ball fully absorbs carbon dioxide, a filter ball adsorbing saturated carbon dioxide is obtained; and uniformly mixing and stirring the saturated carbon dioxide adsorption filter balls and cement mortar concrete to prepare a mineralized lightweight concrete test piece. Inorganic solid waste ceramsite filter balls are treated by an amino acid salt solution and / or amino ionic liquid, then are introduced into a high-concentration CO2 environment such as factory chimney gas and the like to adsorb saturated CO2, and then are directly added into concrete as an additive; and the escaped CO2 rapidly mineralizes and maintains the cementing material and is converted into the main component calcium carbonate of the concrete, and the CO2 is converted and sealed.

The invention relates to a high-temperature-resistant high-strength gel. The high-temperature-resistant high-strength gel comprises the following components by mass percent (100% in total): (1) 0.2-2.0% of polyacrylamide (HPAM); (2) 0.1-1.0% of phenolic resin; (3) 0.1-0.8% of a fortifier; (4) 0.01-0.8% of a stabilizer; (5) 0.02-0.6% of a pH regulator; and (6) the balance of water. The invention further relates to a preparation method of the high-temperature-resistant high-strength gel.

The invention discloses a preparation method of biological activated carbon capable of safely adsorbing cadmium in water. The preparation method of the biological activated carbon capable of safely adsorbing cadmium in the water comprises the following steps: 1) removing impurities from harvested napiergrass, carrying out air drying, and then sequentially smashing and drying; 2) putting smashed and dried napiergrass into a carbonization furnace, heating to 480-520 DEG C at a rate of 4-6 DEG C / min, and carrying out oxygen-free carbonization reaction for 1.8-2.2 hours while heat preservation is carried out; and 3) cooling the carbonized napiergrass obtained in the step 2) to room temperature, smashing, and sieving, so that the biological activated carbon capable of safely adsorbing cadmium in the water is obtained. The preparation method of the biological activated carbon capable of safely adsorbing cadmium in the water has the advantages that the three problems that the adsorption efficiency is low, secondary pollution can be easily caused and cost is high when the existing adsorption technology is used for treating heavy metal wastewater are solved; meanwhile, carbon in plant waste is stably stored, carbon dioxide release is reduced, and obvious ecological benefit is realized.

The invention discloses a dry-hang external wall insulation board and a novel application thereof as a dismounting-free building template. The dry-hang external wall insulation board comprises a panel, upper and lower wall boards, two side wall boards, a bottom plate and an insulation core material, wherein the panel is arranged at the top ends of the wall boards; the outer side surface of the upper wall board extends out of the upper side surface of the panel; a bulk water slope is arranged between the top edge of the outer side surface of the upper wall board and the bottom edge of the upper side surface of the panel; the lower side surface of the panel extends out of the outer side surface of the lower wall board; the part of the panel, extending out of the lower wall board forms a pressure plate mounted by being matched with the bulk water slope; a pressure plate slope is arranged between the bottom edge of the lower side surface of the panel and the top edge of the outer side surface of the lower wall board; a pouring connection piece is embedded between the panel and the bottom plate; the pouring connection piece comprises a fixing rod, a nut at the outer end of the fixing rod and a screw rod matched with the nut; the nut is arranged at the end of the bottom plate; the screw rod extends out of the bottom plate; a U-shaped opening positioning sleeve is arranged on the screw rod; fastening nuts are arranged at the two ends of the U-shaped opening positioning sleeve. The dry-hang external wall insulation board is suitable for dismounting-free self-insulation self-decoration templates of cast-in-situ shear walls and beam columns.

The invention discloses a rapid plugging device for an oil and gas pipeline. The device is mainly composed of an upper shell and a lower shell, casting runners are arranged in the wall surface of theupper shell and the wall surface of the lower shell, and a welding groove and a temperature control groove are formed in the inner wall. According to the rapid plugging device for the oil and gas pipeline, when the device works, an annular cavity formed by the temperature control groove and the wall surface of a to-be-plugged pipeline is filled with a flame retardant through a liquid injection valve, then an aluminothermic reaction is carried out in a reaction funnel, generated metal liquid enters the casting runners from inlets of the casting runners under the action of gravity and finally fills the casting runners, and excess metal liquid flows out of overflow openings; after the metal liquid is cooled and solidified, a liquid discharging valve is opened to discharge the flame retardant;and finally, the liquid injection valve and the liquid discharging valve are closed, so that rapid plugging of the pipeline is completed. The rapid plugging device for the oil and gas pipeline has the advantages of being capable of realizing rapid plugging of the pipeline without stopping conveying of oil and gas, being firm in sealing, simple in structure, reliable in working and convenient andfast, being wide in application prospect and the like.

The invention relates to a complex polymer profile control agent for high-permeability pore-type oil reservoirs and a method for using the same, which relate to the field of oilfield applied chemistry. The present invention injects into high-permeability pore-type oil reservoirs in the form of double slugs. The front-end slugs are mixed with multiple high-molecular polyacrylamides and additives to form a compound polymer to block the high-permeability areas and large pores in the oil reservoir; The slug is mixed with multiple low molecular weight polyacrylamide and additives, which has the characteristics of low viscosity, strong fluidity and shear resistance. After the pre-slug is plugged, it is injected into the oil reservoir for control and displacement, which can inhibit water flooding after plugging For the small-scale water channeling and fingering phenomenon, the profile control agent contains an appropriate amount of surfactant, which can improve the hydrophilicity of formation rocks and inhibit the waxy, colloid, and asphaltenes that are difficult to control by traditional profile control methods in the near-wellbore area. The phenomenon of deposition; the preparation method of the profile control agent of the present invention is simple, can adapt to the preparation of water with a salinity of 500mg / L-35000mg / L, and the raw materials are cheap and easy to obtain.

A deep profile control agent for low-permeability fractured reservoirs and its application method relate to the field of oilfield applied chemistry. The present invention injects into low-permeability fractured reservoirs in the form of double slugs. The front slugs have delayed gelation, and the viscosity is low when initially injected into the reservoirs, and can enter the near-well zone, middle and deep fractures of the reservoir, and form after gelling Stable plugging; the rear slug is mixed with low molecular weight compound polymer and chromium-aluminum ion cross-linking agent, which has the characteristics of low viscosity and strong fluidity. Implement control and flooding to reduce the remaining oil content in the reservoir and increase the water absorption index; improve the heterogeneity of the reservoir through the combination of double slugs, increase the follow-up water flooding sweep coefficient, and inhibit the formation of dead oil areas in low-permeability fractured reservoirs. In order to improve the disadvantages of traditional oil recovery methods such as low recovery rate and poor economic benefits of low permeability fractured reservoirs.

The invention provides a plugging device, which is used for plugging defects in a vasculature, the plugging device comprises two plugging discs and a tightening piece, and the two plugging discs are used for covering different openings of the defects; the tightening piece comprises a tightening line, the tightening line is used for being arranged in the defect in a penetrating mode and connecting the two plugging discs, and the length of the part, between the two plugging discs, of the tightening line can be adjusted through the free end of the tightening line. The invention further provides a plugging system provided with the plugging device and a knotting method of the tightening piece in the plugging device.

The invention discloses a chute descending segment plugging method and structure for effectively improving stability. The method includes the steps: 1) scaling an opening and the periphery of a chute, knocking rocks by a crowbar, prying the rocks with toneless and unclear sound by the crowbar, cleaning pumice stones and ensuring a safe construction environment without hidden danger; 2) filling the chute with ores, leveling the filling ores and laying an isolation layer; 3) setting anchor rods: forming anchor holes in the side wall of the chute between the isolation layer and the opening of the chute, inserting anchoring agents and the anchor rods into the anchor holes together, setting two layers of anchor rods on the side wall of the chute in a horizontally annular manner and embedding latticed strengthening steel into the anchor rods; 4) plugging the chute: pouring concrete into the chute within the range from the isolation layer to the opening of the chute, covering the chute with geotextile and performing maintenance after concrete pouring, finally, capping an ore plate completely covering the opening of the chute at the opening of the chute, and finishing plugging the chute.

The invention relates to a stop valve device of vehicle fuel tanks which can improve the air tightness between the stop valve and an oiling pipe. A fuel pipe is mounted on the fuel tank, and the stop valve is mounted at the inner bottom of the fuel pipe, can move up and down, and is supported by a compression spring. The head of the stop valve is spherical, while the valve step at the lower part of the interior of the fuel pipe is a horizontal plane; a sealing groove is disposed at the outer ring of the lower part of the stop valve head, and a sealing ring is mounted in the sealing groove. Based on the stop valve device of vehicle fuel tanks of the invention, the effective opening area of the discharge space of the fuel pipe is enlarged, and the oiling process into the fuel tank is more fluent. In addition, even though the stop valve has a certain migration due to the reposition process of the stop valve or due to the impact of the fuel tank received during the vehicle running process, the oiling channel can be stably blocked by the stop valve.

Relating to the field of oilfield applied chemistry, the invention provides a low permeability pore type oil reservoir double-slug deep profile control agent and a use method thereof. The profile control agent provided by the invention is injected into a low permeability pore type oil reservoir, in a pre-slug, sodium silicate, partially hydrolyzed polyacrylamide, sodium hexametaphosphate, sodium sulfite, salicylic acid and aluminum citrate are mixed, so that the pre-slug can have the characteristics of low viscosity, strong fluidity and anti-shear capacity, and can block a high permeability pore in the oil reservoir. In a post-slug, a compounded polymer is mixed with a chromium aluminum ion crosslinking agent, so that the post-slug can have the characteristics of low viscosity and strong fluidity, after effective blockage by the pre-slug, the post-slug is injected into the oil reservoir to implement profile control and flooding so as to reduce the residual oil content and increase the water absorption index of the oil reservoir. The double-slug combination way can improve the nonhomogeneity of the oil reservoir, increase the subsequent waterflooding water flooding sweep coefficient, suppress the formation of a low permeability pore type oil reservoir dead oil area, and improve the disadvantages of low recovery rate, poor economic benefits and the like for low permeability pore type oil reservoirs in traditional oil production methods.

The methods disclosed herein relate to sequestering carbon dioxide in an aquifer by trapping the CO2 in interstitial pores of the aquifer. Trapping the CO2 in the interstitial pores of the aquifer prevents the sequestered CO2 from escaping back to the surface and allows a much larger percentage of a CO2 to be stably sequestered compared to techniques that rely on dissolving the CO2 to achieve stable sequestration.

A double-slug composite profile control agent for low-permeability pore-type reservoirs and its application method relate to the field of oilfield applied chemistry. The present invention injects into low-permeability pore-type oil reservoirs in the form of double slugs, and the pre-slugs are mixed with sodium silicate, partially hydrolyzed polyacrylamide, sodium hexametaphosphate, sodium sulfite, salicylic acid, and aluminum citrate, and have low viscosity, With the characteristics of strong fluidity and strong shear resistance, it can block the high-permeability pores inside the reservoir; the rear slug is a compound surfactant, and the unplugged pores are flooded with surfactant to reduce Remaining oil content in the reservoir, increase the water absorption index of the reservoir, and improve the deposition of wax, colloid, and asphaltene in the near-wellbore zone; improve the heterogeneity of the reservoir through the combination of double slugs, and increase the follow-up water flooding sweep coefficient , to suppress the formation of dead oil zones in low-permeability pore-type reservoirs, so as to improve the disadvantages of traditional oil recovery methods such as low recovery and poor economic benefits for low-permeability pore-type reservoirs.

The invention discloses an automatic carton sealing machine and relates to the field of automatic equipment. The automatic carton sealing machine comprises a workbench, a machine frame, a conveying belt, conveying wheels, a carton clamping device and an adhesive tap sticking device. The machine frame is provided with the workbench, the conveying wheels are both installed on the workbench and installed at the two ends of the conveying belt respectively, the upper end of the machine frame is provided with the carton clamping device for correcting the position of a carton, an adhesive tape sticking device for stick adhesive tape to the carton, and a motor used for driving the adhesive tape sticking device for output adhesive tape. A pressing wheel for firmly pressing adhesive tape is arranged in the carton clamping device. The bottom of the adhesive tape sticking device is provided with a pressing roller matched with the pressing wheel for firmly pressing adhesive tape. One side of the machine frame is provided with a power switch, and one side of the machine frame is provided with a lifting cranking handle which controls the workbench to ascend and descend. The automatic carton sealing machine is simple in structure, convenient to use, capable of sealing different packaging cartons, fast to operate, high in automation degree, safe, reliable and good in carbon sealing effect, adhesive tape is not prone to disengagement, and carbon sealing is firm.

The invention discloses a fireproof plugging device, which is used for plugging a hole in a fireproof structure of a building. The fireproof plugging device comprises a longitudinal bottom plate, a first driving device, a transverse bottom plate, a second driving device, a transverse extending plate and a first plugging block, wherein the transverse bottom plate and the first driving device are arranged on the longitudinal bottom plate; the transverse bottom plate is movably arranged on the longitudinal bottom plate, is connected with the first driving device, and is driven by the first driving device to move along the longitudinal bottom plate in the longitudinal direction; the transverse extending plate and the second driving device are arranged on the transverse bottom plate, the first plugging block is arranged on the transverse extending plate, and one side of the first plugging block is hinged to the transverse extending plate; the first plugging block and the transverse extending plate are respectively connected with the second driving device, and the second driving device is used for driving the transverse extending plate to extend out in the transverse direction, and driving the first plugging block to turn over along the hinge side, so as to enable the first plugging block to plug the hole. By adopting the scheme, the fireproof plugging device solves the problems of lower safety coefficient and inconvenience in operation in the existing plugging equipment.

The invention discloses a numerical control vertical type multi-axis linkage deburring machine tool for die casting machining, which comprises a clamping head, a tool apron, a deburring tool, a floating core and a base cylinder, the clamping head clamps a workpiece, the tool apron is provided with a deburring tool and drives the deburring tool to move along the surface of the workpiece, the deburring machine tool further comprises a floating core and a base cylinder, and the base cylinder is fixedly arranged on the tool apron. The floating core is rotationally installed on the base cylinder, the deburring cutter is installed at the end, away from the base cylinder, of the floating core, the base cylinder applies steering force to the floating core so that the end, provided with the deburring cutter, of the floating core can be tightly attached to a workpiece, and the steering force applied by the base cylinder to the floating core is increased when vibration occurs in the deburring process. A workpiece is clamped and fixed by the clamping head, the deburring cutter is driven by the floating core to perform feeding motion to scrape burrs on the surface or burrs on the edges from the surface of the workpiece, the floating core and the base cylinder serve as middle structures for connecting the deburring cutter and the cutter holder, the deburring cutter is installed in a floating mode, the contact force between the deburring cutter and the workpiece is a variable value, and the deburring cutter can be driven by the floating core to perform feeding motion to scrape burrs on the surface or burrs on the edges. The purpose of floating adjustment is achieved.

The invention provides a granular aerosol generating product and a rolling forming method thereof. The aerosol generating product is formed by rolling a filter tip section (comprising an acetate fiber filter tip 1, a cavity 2 and a cooling material 3) wrapped by forming paper, a granular section (tobacco particles 4) and a sheet section (ordered sheet 5) wrapped by the forming paper through packaging paper 6 through a binary composite filter tip forming machine. The aerosol generating product has the advantages that the used tobacco particle plugging structure is an ordered sheet prepared from natural plants such as tobacco, tea and Chinese herbal medicines, and is firm in plugging and good in air permeability; and compared with a traditional filling process, the rolling forming method is high in efficiency, the process is more mature and stable, conversion of the preparation method of the granular aerosol generating product from the filling process to the rolling process can be achieved, and development of the granular aerosol generating product, especially the novel granular tobacco industry, is facilitated.

A double-slug composite profile control agent for low-permeability fractured reservoirs and its application method relate to the field of oilfield applied chemistry. The present invention injects into low-permeability fractured reservoirs in the form of double slugs. The front slugs have delayed gelation, and the viscosity is low when initially injected into the reservoirs, and can enter the near-well zone, middle and deep fractures of the reservoir, and form after gelling Stable plugging; the rear slug is a compound surfactant, which is injected into the oil reservoir after the front slug is effectively blocked, and the unplugged pores are flooded with surfactant to reduce the remaining oil content in the reservoir, Increase the water absorption index, improve the deposition of wax, colloid, and asphaltene in the near-wellbore area; improve the heterogeneity of the reservoir through the combination of double slugs, increase the follow-up water flooding sweep coefficient, and inhibit the death of low-permeability fractured reservoirs. Oilfields are formed to improve the disadvantages of traditional oil recovery methods such as low recovery rate and poor economic benefits for low-permeability fractured reservoirs.

The invention discloses a device for repairing a pipeline through memory alloy. The device comprises a to-be-repaired pipeline body, a to-be-repaired hole is formed in the to-be-repaired pipeline body, a repairing device is arranged at the right end of the to-be-repaired pipeline body, the repairing device comprises a fixing ring, the left side of the fixing ring is fixedly connected with the right end of the to-be-repaired pipeline body, the inner wall of the fixing ring is fixedly connected with a first shell, the first shell is arranged in the to-be-repaired pipeline body, the inner wall ofthe first shell is slidably connected with a second shell, the right side of the second shell is fixedly connected with a transmission rod, the surface of the transmission rod penetrates through thefirst shell and is slidably connected with the first shell, and the right end of the transmission rod is fixedly connected with a push-pull ring. According to the device for repairing the pipeline through the memory alloy and the using method thereof, through cooperative use of the structures, and the problems that in the actual use process, due to the fact that a traditional repairing device is not prone to being tightly adhered to the pipe wall in the use process, falling off, aging and loosening are prone to happening, pipeline leakage is caused, and inconvenience is brought to use are solved.

The invention provides a high-seepage sandstone oil reservoir compound polymer type profile control agent and a use method thereof, and relates to field of oil field application chemistry. A compound polymer is formed by mixing three kinds of partially hydrolyzed polyacrylamide with different molecular masses; the compound polymer and additives are mixed for forming the profile control agent; two kinds of profile control agent slugs with different characteristics are prepared through regulating the proportion of the partially hydrolyzed polyacrylamide and the additives. In the implementation process, high-seepage zones and big pore passages of a high-seepage sandstone oil reservoir are sealed and plugged through a prepositive slug; the profile control is implemented by a postpositive slug; the problems of low polymer flooding yield, invalid polymer flooding circulation, clay expansion, dead oil zone generation inhibition and the like of a conventional high-seepage sandstone oil reservoir are solved. The profile control agent has the advantages that the preparation method is simple; before the curing, the viscosity is low; the injection is easy; the adaption to preparation water with the mineralization degree being 500mg / L to 35000mg / L can be realized; in addition, the raw materials are cheap and can be easily obtained.

The invention discloses a temporary plugging gate and a temporary plugging method of a sewage pipeline. The temporary plugging gate comprises a conical cylinder, a front gate plate, a connecting rod and a support frame, wherein the connecting rod is arranged in the conical cylinder through the support frame; one end of the conical cylinder is provided with a rubber pad; a bolt hole is formed in the front gate plate; a threaded hole corresponding to the bolt hole is formed in one end of the connecting rod; and the front gate plate is arranged at one end of the conical cylinder and fixed througha bolt. The temporary plugging gate is suitable for plugging construction of the sewage pipeline under a sewage well, the gate can be plugged more tightly and firmly under the action of water pressure during plugging operation, an original sewage structure is not damaged in the mounting and dismounting process, the plugging and dismounting method is simple and easy to operate, and the plugging efficiency and the plugging effect are high; and the temporary plugging gate is simple in overall structure, low in cost and easy to mount and dismount, guarantees safe plugging, and has good application prospects.

The invention discloses a method for enhancing the carbon dioxide adsorption performance of shale and cooperatively storing nitrogen dioxide, which utilizes nitrogen dioxide to improve the adsorptionperformance of shale on carbon dioxide and achieves the purpose of reducing nitrogen dioxide emission at the same time. Specifically, nitrogen dioxide molecules with high chemical activity react withunderground water of a shale reservoir to generate nitric acid and nitric oxide; on one hand, the generated nitric acid can dissolve carbonate and other mineral components in the shale to expose partof pores of the shale, so that the carbon dioxide adsorption performance of the shale is enhanced; and on the other hand, the shale reservoir environment is an anoxic environment, the generated nitricoxide cannot be oxidized to generate nitrogen dioxide, and the shale has a strong chemical adsorption effect on the nitric oxide and is difficult to desorb, so that the long-term stable storage of the shale on the nitrogen dioxide is realized. According to the method, the nitrogen dioxide is cooperatively stored in the process of storing greenhouse gas carbon dioxide, thereby providing an effective way for reducing the coal-fired flue gas denitration treatment cost.

The invention discloses a starting device and fire extinguishing equipment. The starting device comprises a shell, a gas production device and an initiating device; at least one nozzle is formed in the shell, and a sealing cavity is formed in the shell; the gas production device comprises an integrated sealed container and a driving medium sealed in the sealed container, and the sealed container is connected with the shell; the initiating device is located outside the gas generation device and comprises a firing pin and an initiator, and the firing pin corresponds to the sealed container and is used for puncturing the sealed container so that the driving medium can be sprayed out of the sealed container to form gas; one end of the initiator is located in the sealing cavity, and the other end of the initiator penetrates through the shell to extend out of the shell so as to increase the air pressure of the sealing cavity; and the sealing cavity corresponds to the firing pin and is used for directly or indirectly driving the firing pin to move towards the sealed container through the increased air pressure. Thus, a fire extinguishing agent does not need to be stored under pressure, the problem of pressure leakage of existing pressure storage type fire extinguishing equipment is fundamentally solved, the maintenance cost of regular pressurization is saved, and the use reliability of the fire extinguishing equipment is also improved.

The invention provides a safe and efficient infusion and oxygen delivery device for the emergency department, and relates to the technical field of medical instruments. The movable supporting device is fixedly connected with an oxygen inhalation mounting part; a floating positioning device is mounted on the oxygen inhalation mounting part; a liquid collecting device is fixedly connected between the two positioning pieces; four flow dividing devices are fixedly embedded in the liquid collecting device; four quantity control driving parts are mounted on the liquid collecting device; the four quantity control driving parts are aligned with the four flow dividing devices; the bottom of the liquid collecting device is fixedly connected with a linkage flow stopping part; the bottom of the linkage flow stopping part is fixedly connected with a liquid shortage safety device, infusion is safer, meanwhile, safe blocking can be achieved in an auxiliary mode, quantity control is more accurate, air pollution can be effectively avoided, and the problems that an existing infusion and oxygen delivery device cannot effectively achieve automatic liquid shortage blocking, medical accidents are likely to be caused, potential health hazards exist, and the safety is high are solved. And meanwhile, free regulation and control of multiple bags of medicines cannot be realized.

The invention discloses a starting device and fire extinguishing equipment. The starting device comprises a housing, a gas production device and an initiating device; the gas production device comprises an integrated sealed container and a driving medium sealed in the sealed container, and the sealed container is connected with the housing; and the initiating device is matched with the gas production device and is used for opening the sealed container, so that the driving medium is sprayed out of the sealed container to form gas. Therefore, a fire extinguishing agent does not need to be stored under pressure, so that the problem of pressure leakage of existing pressure storage type fire extinguishing equipment is fundamentally solved, the maintenance cost of regular pressurization is saved, the use reliability of the fire extinguishing equipment is also improved, and meanwhile, a pressure gauge can also be saved.

The invention discloses a left atrial appendage plugging device and system, and relates to the field of medical instruments, the left atrial appendage plugging device comprises: a first skeleton having a first conductive portion, the first conductive portion being used for transmitting first ablation energy to tissue; the second skeleton is provided with a second conductive part, the second conductive part is used for transmitting second ablation energy to the tissue, and the polarity of the first ablation energy is opposite to that of the second ablation energy; and the first insulating connecting piece is used for connecting the first framework and the second framework. By means of the left auricle plugging device and system, the operation difficulty of left auricle ablation and plugging one-stop treatment can be reduced, and the operation procedure is simplified.

The invention discloses a profile control agent with poly-surface double-slug type for positive rhythm oil reservoirs and a method for using the same, relating to the field of oilfield applied chemistry. The present invention is injected into positive rhythm oil reservoirs in the form of double slugs, and the pre-slugs are mixed with different molecular mass partially hydrolyzed polyacrylamide and chromium-aluminum ion cross-linking agents to form a polymer with a skeleton cross-linked structure, which can The high-permeability zone at the bottom of the reservoir is firmly blocked; the post-slug is a compound surfactant, which is injected into the reservoir after the front-slug is effectively blocked, and the high-position low-permeability zone is flooded with surfactant to reduce oil Increase the remaining oil content in the reservoir, increase the water absorption index of the oil layer; improve the heterogeneity of the reservoir by means of double slug combination, increase the follow-up water flooding sweep coefficient, and inhibit the formation of dead oil areas in positive rhythm reservoirs, so as to improve the positive rhythm of traditional oil production methods. Rhythmic reservoirs have disadvantages such as low recovery factor and poor economic benefits.

The invention discloses a fire protection plugging device which is used for plugging holes in fire protection structures of a building. The fire protection plugging device comprises a base (1), a base plate (2), a first driving device, a second driving device, an L-shaped vertical plate (10), a third driving device and a first plugging block (13). The base plate (2) and the first driving device are both arranged on the base (1). The base plate (2) can be driven by the first driving device to move horizontally relative to the base (1). The second driving device and the L-shaped vertical plate (10) are both arranged on the base plate (2). The L-shaped vertical plate (10) can be driven by the second driving device to move longitudinally relative to the base plate (2). The first plugging block (13) and the third driving device are both arranged on the L-shaped vertical plate (10). The first plugging block (13) can be driven by the third driving device to move vertically relative to the L-shaped vertical plate (10). Through the scheme, the problems of low safety coefficient and inconvenient operation of existing plugging equipment can be solved.