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88results about How to "Viscoelastic" patented technology

Temperature-resistant salt-resistant viscoelastic polymer gel microsphere, profile control and flooding agent, and preparation methods and applications thereof

ActiveCN111087536APlay a role in profile controlPlay the effect of adjusting and drivingDrilling compositionMicrosphereCrosslinked polymers
The invention relates to a temperature-resistant and salt-resistant viscoelastic polymer gel microsphere and a profile control and flooding agent as well as preparation methods and applications thereof, and mainly solves the problems that in the prior art, polymer microspheres generally only have a profile control effect on medium-high permeability oil reservoirs, and have difficulty in controlling the fluidity of low-permeability oil reservoirs. According to the technical scheme, the polymer gel microsphere is adopted; the polymer gel microsphere comprises a gel microsphere and a polymer coated on the microsphere, wherein the gel microsphere is a crosslinked polymer containing an acrylamide structural unit; and the polymer is a water-soluble polymer containing an acrylamide structural unit. The problem is well solved, and the prepared temperature-resistant salt-resistant viscoelastic polymer gel microsphere profile control and flooding system is directly used or compounded with otheroilfield chemicals, and then is used for onsite application such as deep profile control, flooding and the like for tertiary oil recovery of high-temperature and high-salinity oil reservoirs to increase the recovery ratio.
Owner:CHINA PETROLEUM & CHEM CORP +1

Method for preparing plugging agents

The invention belongs to the technical field of a sealing-up and plugging materials, and particularly relates to a method for preparing plugging agents. The method includes smashing diatomaceous earth, bentonite, sepiolite and the like and mixing and stirring the diatomaceous earth, the bentonite, the sepiolite and water to obtain suspension; collecting emulsion from rubber trees, mixing and heating the emulsion, heavy calcium carbonate, carboxymethyl celluloses and polyamide fibers to obtain first mixtures; adding silane coupling agents into the first mixtures and carrying out ultrasonic treatment to obtain modified natural emulsion; mixing, heating and stirring the modified natural emulsion and lauroyl diethanolamine solution to obtain second mixtures, adding initiators, the suspension and cross-linking agents into the second mixtures, stirring the second mixtures, the initiators, the suspension and the cross-linking agents to obtain third mixtures and adding acrylamide solution into the third mixtures; carrying out reaction and then discharging and drying reaction products to obtain the plugging agents. The method has the advantages that the plugging agents prepared by the aid of the method are high in blocking speed and plugging success rate, formed plugging layers are high in loading capacity, good plug forming effects can be realized, repeated leakage can be prevented, and the plugging agents are little in environmental influence and free of pollution, are non-toxic and can be constructed safely and quickly.
Owner:石磊

Method for preparing active factor sustained-releasing PELA (Percutaneous endovenous laser ablation) microsphere scaffold bone repairing material

The invention discloses a method for preparing an active factor sustained-releasing PELA (Percutaneous endovenous laser ablation) microsphere scaffold bone repairing material. The method comprises the following steps of selecting biodegradable PELA as a basic capsule wall material; mixing rhBMP-7 dry powder and distilled water, and dissolving the rhBMP-7 dry powder to form an internal aqueous phase; uniformly mixing the PELA and an organic solvent dichloromethane to form an oil phase; adding the internal aqueous phase into the oil phase, and performing ice-bath ultrasonic emulsification to form primary emulsion; adding the primary emulsion into external aqueous phase, performing stirring to remove the organic solvent, performing repeated washing and centrifugation operation, and performing vacuum freeze-drying to form initial micro-capsule dry powder for storage; adding dissolution fluid into the initial micro-capsule dry powder for uniform mixing; freeze-drying the initial micro-capsule dry powder mixed with BMP-2 to form final micro-capsule dry powder; placing the final micro-capsule dry powder into a die; placing the die into a sealed container with dichloromethane, and performing sealed steam fumigation until the dry powder is gradually fused into a viscous and elastic body with certain porosity; air-drying the viscous and elastic body to completely volatilize the dichloromethane remaining the surface of the material to obtain a filling material for bone defects.
Owner:李夏林 +1

Conductive adhesive, a solar back passivation battery, a stacked tile battery string and a manufacturing method thereof

The invention relates to a conductive adhesive, a solar back passivation battery, a stacked tile battery string and a manufacturing method thereof, belonging to the field of solar photovoltaic cells.Conductive adhesives are mainly composed of conductive particles, resins, solvents and optional additives. The resin body comprises one or more of a saturated linear polyester or copolyester having athermoplastic and a molecular weight of 20,000 to 80,000 Mw, or a phenoxy resin. A conductive adhesive film / tape is formed by curing the conductive adhesive film / tape with a volatile solvent heated below 220 DEG C, and the adhesive film can obtain adhesion when heated and pressurized and can adhere two interfaces and conduct electricity. A main gate electrode is fabricated on that aluminum back field surface of the back passivation cell sheet without breaking the passivation lay, thereby improving the conversion efficiency of the cell sheet. The main gate electrode has strong adhesion to the high-temperature sintered aluminum film, and is used for improving the structure of the solar cell sheet. The application of the above characteristics of conductive adhesive can simplify the fabrication of tiled solar cell strings-no additional use of conventional conductive adhesive is required.
Owner:彭延岩

Biological fracturing fluid system as well as preparation and application thereof

The invention relates to a biological fracturing fluid system and particularly relates to a novel biological fracturing fluid system applicable to exploitation of unconventional gas reservoirs. The biological fracturing fluid system contains the following components by weight: 2g/L-4g/L of a gelatin polymer, 0.02g/L-2g/L of a biological bactericide, 0.25g/L-0.5g/L of a biological discharging aid, 10g/L-30g/L of a clay stabilizing agent, a pH value regulator, 10mg/L-30mg/L of an enzyme gel breaker and the balance of water. The biological fracturing fluid system can furthest exert the advantages of fracture formability and filtrate loss resistance of gelled fracturing fluid corresponding to the unconventional gas reservoirs such as coal bed gas, shale gas and tight sandstone gas, and biological enzyme is taken as a gel breaker, so that the jelled gel is thoroughly broken, the residue amount is extremely low, nature or fractured pores of the reservoirs are not blocked, the fracture construction effect is guaranteed, the effective flowback is realized, the damage of a stratum is reduced, and the productivity of an unconventional gas well is improved; the biological fracturing fluid system is a relatively ideal novel fracturing fluid system applicable to the exploitation of the unconventional gas reservoirs.
Owner:DALIAN BITEOMICS INC

Bistable state actuator

The invention provides a bistable state actuator which comprises a support, a prestretching mechanism, an actuating mechanism and a driving mechanism. The prestretching mechanism is provided with stretching arms which are distributed on the two sides of the support. The driving mechanism comprises two intelligent soft material thin films, the inner ends of the two thin films are attached to a rigid piece respectively, the outer ends of the two thin films are fixedly connected to clamps which are connected with the stretching arms respectively, and the actuating mechanism is driven through contracting and stretching of the intelligent soft material thin films. The actuating mechanism comprises a bistable state beam and the rigid piece, and the bistable state beam is placed at the center of the actuating mechanism and vertically penetrates through the middle of the rigid piece. The intelligent soft material thin films are attached to the rigid piece, and the two ends of the bistable state beam are connected with the support. The actuator is switched between two stable states through position state switching of the bistable state beam, the bistable state beam only provides energy when the position states are switched, and it is kept that energy is of no need in the stable position states. The bistable state actuator achieves bistable state driving by the aid of intelligent sift material thin film materials and the bistable state structure, and not only is the advantage of a common actuator achieved, but also the advantages of miniaturization, power saving and quick response are achieved.
Owner:ZHEJIANG UNIV

Phosphate fertilizer controllably released through pH-sensitive material and preparation method of phosphate fertilizer

The invention provides a phosphate fertilizer controllably released through a pH-sensitive material. The phosphate fertilizer is characterized by being prepared by coating a water-soluble phosphate fertilizer with the pH-sensitive material, wherein the pH-sensitive material is prepared by crosslinking wheat gluten and zeolite under the action of a crosslinking agent; after a crop is lack of phosphorus, the pH value of the periphery of the root system is reduced because organic acid secreted by the root system of the crop is increased, and the wheat gluten embedded in pores of the zeolite is pored through soluble inflation and hydrolysis under the condition of low pH value, so that a controlled release effect is achieved; and at the moment, water-soluble phosphorus cannot be fixed by soil due to the existence of organic acid, so that the efficient absorption of the crop on phosphorus is increased to the maximum extent, and the fixed and lost phosphorus is reduced. By using the phosphate fertilizer controllably released through the pH-sensitive material, the problems that the absorption and utilization rates of crops on phosphorus are low and phosphorus is easily fixed and lost because phosphorus in the existing controlled-release phosphate fertilizer cannot be controllably released according to the growth demands of the crops are solved.
Owner:黑龙江实力农业肥料科技有限公司
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