17results about How to "Long validity period" patented technology

The utility model discloses a cleaning agent self -suction type cleaning brush, including the casing, the bottom rotation of casing is equipped with the brush head, and the top is equipped with the water outlet pipe of fixed setting, and the inside is equipped with the drive assembly of transmission connection with the brush head, the bottom of brush head is equipped with the water jet, the upper end of water outlet pipe is linked with outside inlet valve, and the lower extreme is passed through the casing and is set and is opposite water jet, and the side detachable connection has the jar for storing cleaning agent, be equipped with self -suction device in water outlet pipe, the jar is linked with water outlet pipe through self -suction device, and self -suction device is suitable for the cleaning agent in negative pressure suction jar, the utility model discloses the clean water and cleaning agent separate storage, and realize the automatic mixing of cleaning agent and clean water when using, guarantee the cleaning effect, make the cleaning agent have longer effective period, convenient for the user to use.

The present application relates to the technical field of artificial board, and discloses a kind of mould-proof composite board for wardrobe and a preparation method thereof.The composite board for wardrobe prepared by the present application is prepared by using rubberwood sheet as main raw material, impregnating treatment with mould-proof and antibacterial agent, and then adhesive treatment with adhesive containing mould-proof and antibacterial agent.The composite board realizes long-term inhibition of mould through multi-mechanism sterilization of components, synergistic effect and material level protection, and is suitable for wardrobe application in high-humidity environment.In addition, the use of mould-proof and antibacterial adhesive also endows the composite board with excellent bonding strength.

The invention discloses a bottom gas material and preparation and application thereof, and relates to the field of gas storage. The bottom gas material comprises a gas-repellent nano material, a surfactant and carbon dioxide. The bottom gas material has the beneficial effects of density regulation and improvement, remarkable diffusion inhibition, excellent dynamic adaptability and the like, and can solve the problems of easiness in molecular diffusion, low density gradient, poor dynamic stability and the like of an existing bottom gas material of a gas storage.

The application discloses a slow-release foam displacement agent and a preparation method and application thereof. The slow-release foam displacement agent comprises a metal slow-release film and a foam displacement agent wrapped inside the metal slow-release film. The slow-release foam displacement agent has a slow-release time of greater than 3 days under the conditions of a temperature of 30-80 DEG C and a pH of 3-6 of a gas well. According to the foam performance test of the slow-release foam displacement agent according to the enterprise standard QSHCG0135-2021 'Technical requirements for foam displacement agents' of China Petroleum and Chemical Corporation, the slow-release foam displacement agent reaches the peak value of foaming capacity, foam stability and liquid carrying capacity of a solution when being slow-released for 2-5 days. When the peak value is reached, the liquid carrying capacity is greater than or equal to 120 mL, the foaming capacity is greater than or equal to 140 mm, and the foam stability is greater than or equal to 120 mm, and the slow-release foam displacement agent has good foaming performance, foam stability and liquid carrying capacity.

The application belongs to the technical field of oil exploitation, and discloses a low-permeability fractured water breakthrough reservoir water injection well profile control dynamic regulation method, which comprises the following steps: determining a water breakthrough direction and corresponding water injection well according to dynamic monitoring data or well group production dynamic change conditions; using a particle type plugging agent to perform profile control treatment on the water injection well; after the profile control treatment, adjusting a daily water injection amount of the water injection well according to a formation energy retention condition, controlling liquid production of a main direction well, increasing a parameter of a lateral well, and adjusting a subsequent daily water injection amount according to a well group liquid amount change condition; dynamically monitoring a regulation result, and adjusting well group production parameters based on a fracture plugging effect. The method can directionally plug the main direction fracture, reduce lateral oil layer pollution, promote deep migration of the profile control agent, and effectively balance planar liquid production, and has important significance for treating low-permeability fractured water breakthrough and improving planar water drive unevenness.

This invention relates to a tubing string for locating water plugs, comprising a drop-out outer tube and an inner tube. The drop-out outer tube includes an upper packer, a lower packer, an upper oil inlet channel, a middle oil inlet channel, and a lower oil inlet channel. The inner tube includes a tubing. The drop-out outer tube also includes an upper seal and a lower seal located on the upper and lower sides of the upper packer, respectively. Each of the upper and lower seals contains a sealing element. The tubing has sealing mating sections on the upper and lower sides of the fluid inlet of the inner tube: an upper sealing mating section and a lower sealing mating section. These sealing mating sections are used to seal with the sealing elements in the upper and lower seals when the inner tube is raised and lowered. The tubing string for locating water plugs provided by this invention eliminates the need for a sealing assembly on the outer periphery of the inner tube, preventing damage to the external rubber seals from friction with the wellbore wall during the well running process. This improves the reliability of the seal and reduces the number of rubber seals required, thus saving costs.

The utility model provides a nitrogen-filled sealing device which comprises a base, a nitrogen-filled sealing device and a nitrogen-filled sealing device. The base supports a penicillin bottle; the protective shell is arranged above the base, the protective shell is configured to cover the penicillin bottle, a containing space is formed in the protective shell, the protective shell is provided with a through hole, and the through hole is configured to receive the protective gas filled in the containing space so that the penicillin bottle can contain the protective gas; the first lifting mechanism is connected with the protective shell, and the first lifting mechanism drives the protective shell to move relative to the base in the vertical direction; and the adsorption pressing piece is arranged in the protection shell and can move in the vertical direction, and the adsorption pressing piece is configured to suck up a bottle plug of the penicillin bottle and press a bottle opening of the penicillin bottle. According to the nitrogen filling and sealing device, the risk that radiopharmaceutical overflows in the nitrogen filling and sealing process of the penicillin bottle can be reduced, and the convenience and safety of sealing and nitrogen filling are improved.

The invention belongs to the field of mosquito prevention and killing, and particularly relates to a technology for killing mosquitoes by using a safe and non-toxic alkaline which does not contain pyrethroids and phosphorus. The preparation method comprises the following steps: mixing water, glycol stearate, tetrasodium glutamate diacetate, sodium hydroxide, fatty alcohol-polyoxyethylene ether and polydimethylsiloxane to obtain a mixed aqueous solution, standing, and filtering to obtain a final aqueous solution of the mosquito killer. Strict tests prove that the non-pyrethroid alkaline mosquito killer has a very high killing effect on static and flying mosquitoes by spraying an aqueous solution through a spraying can, is environment-friendly, particularly has no pollution to air when being used in a closed space, and is an ideal non-pyrethroid alkaline mosquito killer. The pyrethroid mosquitocide has a good killing effect on various mosquitoes, and another mosquito killing method except the pyrethroid mosquitocide is provided.

This invention provides a method for preparing a metformin compound hypoglycemic oral solution, relating to the pharmaceutical field, comprising: step S1, pretreatment of traditional Chinese medicine components; step S2, enzymatic hydrolysis of the first group of traditional Chinese medicine components; step S3, supercritical extraction; step S4, preparation of mixed traditional Chinese medicines; step S5, preparation of inclusion complex; step S6, compound formulation; and step S7, post-processing. This method synergistically combines extracts from seven traditional Chinese medicines—bitter melon, phellodendron bark, astragalus root, kudzu root, rehmannia root, ginseng, and privet fruit—with metformin hydrochloride to form a metformin compound hypoglycemic oral solution, balancing the synergy, safety, and stability of traditional Chinese and Western medicines, thereby improving hypoglycemic effects while reducing the incidence of gastrointestinal adverse reactions to metformin.

The utility model relates to a civil protective smoke mask which comprises a mask body, the periphery of the mask body can be attached to the face, a fixing belt assembly is installed on the mask body, transparent eyeshades are installed at the positions, corresponding to the eyes, of the mask body, and a convex shell is fixedly communicated with the position, corresponding to the mouth and the nose, of the mask body. The convex shell is communicated with a telescopic ventilation pipe assembly, a detachable ventilation filter element is installed at the communication position of the ventilation pipe assembly and the convex shell, a lacing assembly is installed at the end, away from the convex shell, of the ventilation pipe assembly, and the ventilation filter element is of a sheet-shaped structure; the breathable filter element is formed by compositing two non-woven fabric layers and a melt-blown fabric layer located between the two non-woven fabric layers, and when the mask is used, normal breathing of a user can be facilitated; secondly, waste can be reduced; and finally, the breathable filter element can be conveniently disassembled, assembled and replaced.

This invention discloses a metal-sprayed in-situ repair tool and method for downhole casing, belonging to the field of oil and gas well casing repair technology. The metal-sprayed in-situ repair tool includes an upper connector, an upper shell, a lower shell, and a suspension connector. The upper shell, lower shell, and suspension connector are sequentially equipped with a high-pressure gas injection device, an alloy storage and heating device, and a rotary spraying device along the axial direction. This invention utilizes electromagnetic induction heating to melt alloy materials and performs plugging and repair work on damaged casing through gas-powered spraying additive manufacturing, enabling in-situ repair of downhole casing. The technical solution provided by this invention can quickly and effectively complete in-situ plugging and repair of damaged downhole casing, eliminating the need for frequent tool changes, simplifying the operation steps of downhole casing repair, and significantly improving the efficiency of downhole casing repair operations.

The application provides a compound omeprazole dry suspension and a preparation method thereof, and relates to the technical field of pharmaceutical preparations.The compound omeprazole dry suspension comprises the following raw materials: omeprazole, sodium bicarbonate, magnesium silico-aluminate, hard stearic acid modified hydrotalcite, low acyl gellan gum, hydroxypropyl methyl cellulose and trehalose.The application provides a compound omeprazole dry suspension and a preparation method thereof, and the compound omeprazole dry suspension with specific particle size is prepared through specific proportioning of auxiliary materials and a specific preparation process, and the stability and solubility are significantly improved.

The invention belongs to the technical field of cosmetics, and particularly relates to a mandelic acid-containing ternary supramolecular eutectic composition as well as a preparation method and application thereof. The mandelic acid-containing ternary supramolecular eutectic composition is prepared from mandelic acid, succinic acid and dimethyl sulfone in a mass ratio of (1-4): 1: 1. The preparation method comprises the following steps: respectively taking mandelic acid, succinic acid and dimethyl sulfone, carrying out vacuum drying to remove moisture and impurities so as to obtain pretreated raw materials, adding the pretreated raw materials into a ball mill, adding absolute ethyl alcohol accounting for 10-20% of the total mass of the raw materials as a grinding aid solvent, carrying out grinding so as to obtain a mixture, and finally, carrying out drying to remove an ethanol solvent so as to obtain the mandelic acid-succinic acid composite grinding aid. The mandelic acid-containing ternary supramolecular eutectic composition is obtained. According to the ternary supramolecular eutectic prepared by adopting a specific raw material ratio and a specific process, a stable crystal structure is formed through a hydrogen bond network, the stability, the exfoliating effect and the acne removing effect of the ternary supramolecular eutectic in cosmetic application can be remarkably improved, and meanwhile, the irritation to inflammatory skin is lower.

The application discloses a water control blocking agent for edge and bottom water thickened oil reservoir, which is composed of the following components in percentage of the total mass of the water control blocking agent: water-soluble resin 3-40%, flexible polymer 0.1-5%, coagulant 0.01-1%, suspending agent 0.01-2%, and water as the balance. The application also discloses a preparation method of the water control blocking agent for edge and bottom water thickened oil reservoir, which comprises the following steps: (1) pouring water into a reaction container according to the formula, and then sequentially adding water-soluble resin, suspending agent, oxygen scavenger and toughening agent according to the formula, stirring for at least 20 minutes to obtain a first mixed solution; (2) adding flexible polymer to the first mixed solution according to the formula, stirring at room temperature for at least 4 hours until completely dissolved to obtain a second mixed solution; and (3) adding coagulant to the second mixed solution according to the formula, and continuing to stir for at least 30 minutes to obtain the water control blocking agent for edge and bottom water thickened oil reservoir.

The application discloses a large-dose deep profile control injection method for a horizontal well, and according to the permeability of a stratum where a horizontal well to be injected is located, when the permeability distribution of two ends of the horizontal well to be injected is uneven, a stratum is positively injected to be blocked at the horizontal well section with the largest permeability, and then the blocked stratum is removed by reversely injecting from the horizontal well section with the smallest permeability; the positive injection and the reverse injection are repeated, the high-permeability area is blocked by using injection materials, and when the permeability of the two ends of the horizontal well to be injected is uniform, the positive injection and the reverse injection are alternately injected from the two ends of the horizontal well section until a preset injection amount is reached, so that the large-dose deep profile control injection of the horizontal well is completed, the uniformity of the distribution of the profile control agent in the stratum is obviously improved, the profile control operation effect is improved, and the effective period of the profile control is prolonged; meanwhile, the profile control agent entering amount of different areas of the horizontal section can be adjusted by adjusting the injection time of the positive injection and the reverse injection, and the high-permeability area can be controlled.

The present application relates to the technical field of biological detection, and particularly relates to a leukemia tumor cell detection kit. The leukemia tumor cell detection kit provided by the present application comprises a monoclonal antibody and a compound buffer; the monoclonal antibody comprises CD71 antibody, CD56 antibody, CD38 antibody, CD19 antibody, CD10 antibody, CD64 antibody, CD15 antibody, CD13 antibody, CD7 antibody and CD33 antibody; the monoclonal antibody is marked with a detection marker; the compound buffer comprises glycine, leucine, potassium dihydrogen phosphate, sodium hydroxide and deionized water; the pH value of the compound buffer is 7.2-7.4. The present application constructs a new compound buffer, which can better stabilize the antibody and other components in the leukemia tumor cell detection kit, obviously prolongs the effective period of detection precision and detection efficiency, and greatly saves the detection cost.

The invention belongs to the technical field of pharmacy, and particularly relates to minoxidil liniment as well as a preparation method and application thereof. The minoxidil liniment comprises the following components: minoxidil, an alcoholic solution, a stabilizer, an oat extract and water, wherein the stabilizer comprises EDTA (Ethylene Diamine Tetraacetic Acid)-tetrasodium, panthenol and hydroxypropyl cellulose. By utilizing the synergistic effect of the EDTA-tetrasodium, the panthenol and the hydroxypropyl cellulose, the preparation process is optimized, so that the effectiveness and the stability of the minoxidil serving as the raw material medicine can be effectively improved, the validity period of the minoxidil can be prolonged, and the medication compliance can be improved. According to the liniment disclosed by the invention, the oat extract is adopted as an auxiliary material of the liniment, so that side effects of minoxidil are reduced, red and swollen, pruritus and discomfort possibly caused by minoxidil can be effectively relieved, damaged scalp skin barriers are helped to be repaired, microinflammation around hair follicles is reduced, and a healthier environment is created for hair growth.