28 results about "Salt resistance" patented technology

This utility model belongs to the field of oil and gas extraction technology, and discloses a measuring device and a rotational rheometer for detecting the salt resistance of crosslinking agents. The measuring device for detecting the salt resistance of crosslinking agents includes a housing, a cover, a rotating assembly, and a liquid injection assembly. The housing is fitted into a supporting groove and has a communicating receiving chamber and a liquid injection channel, the liquid injection channel being located on the side wall of the housing. The cover is detachably fastened to the housing and has a through hole. The rotating assembly is located in the receiving chamber, and one end is rotatably mounted vertically in the through hole. The rotating assembly is connected to the output end of the rotational drive mechanism of the rotational rheometer. The liquid injection assembly includes a storage container, a liquid injection pipeline, and a liquid injection mechanism. One end of the liquid injection pipeline is connected to the storage container, and the other end is connected to the liquid injection channel. The storage container is used to store brine, and the liquid injection mechanism is located on the liquid injection pipeline. Using this measuring device to detect fracturing fluids can reduce the workload of workers and improve work efficiency.

The invention provides a thickening agent for self-crosslinking slick water, a preparation method of the thickening agent and fracturing fluid, and belongs to the technical field of oil exploitation. Comprising a temperature-resistant, shear-resistant and salt-resistant polymer, a synergist, a salt-resistant component, a structure regulator, a suspending agent and an emulsifier. The prepared thickening agent for the self-crosslinking slick water is good in temperature resistance, salt resistance and shearing resistance, has good tackifying and dissolving performance and good sand carrying and thickening effects, is low in damage rate to a rock core after gel breaking, can be widely applied to fracturing transformation of low-permeability and ultra-low-permeability reservoirs, and has a good application prospect. The prepared fracturing fluid integrates the functions of drag reduction, sand carrying, fracture forming, swelling prevention, discharge aiding, low damage and the like, and has a wide application prospect.

The present disclosure relates, according to some embodiments, to systems, apparatus, compositions, methods, and workflows that include salt active nucleases (e.g., salt active nuclease variants) with desirable properties including, for example, salt tolerance.

The invention discloses a drag reducer for brine-resistant well cementation. The drag reducer comprises 45-60 parts by weight of a polycarboxylic acid polymer, 35-45 parts by weight of an aliphatic polymer and 5-10 parts by weight of a naphthalene sulfonic acid dispersant. The brine-resistant well cementation drag reducer provided by the invention is formed by mixing a plurality of polycarboxylic acid drag reducers, aliphatic drag reducers and naphthalene drag reducers which have dispersion effects, has the advantage of good dispersion at both high temperature and low temperature, and has a good salt-resistant effect; compared with the conventional drag reducer, the drag reducer provided by the invention has the advantages that the addition amount is greatly reduced, the efficiency is high, and the dispersing performance of a system is excellent; meanwhile, the rheological property is good, and the characteristic of sodium chloride brine resistance is also achieved; the drag reducer provided by the invention has broad spectrum performance and can be applied to conventional cement slurry, salt-containing cement slurry and high-density cement slurry systems.

The application discloses a salt-resistant water-non-dispersible material for oil well cement and a preparation method thereof. The salt-resistant water-non-dispersible material for oil well cement comprises the following components in the form of weight parts: 100 parts of N,N-dimethyl acrylamide, 3-6 parts of acrylic acid, 10-20 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5-15 parts of a cyclic monomer, 0.1-0.4 parts of a branching agent, 5-15 parts of a cationic monomer, 0.3-3 parts of a crosslinking agent and 400-500 parts of water. The salt-resistant water-non-dispersible material prepared by the application has good salt resistance, can significantly improve the anti-dispersion performance of the cement slurry when used in a salt water and sea water cement slurry system with a NaCl content of 18 wt% or less, and has excellent rheological performance.

The present application relates to a kind of anti-salt thickening agent and its preparation method and application, belong to the technical field of oil fracturing fluid processing.Solve the technical problems of low economic benefit, high cost and big environmental protection pressure in prior art that fracturing flowback fluid must be treated before being reused, such as metal ions, solid impurities and the like.The anti-salt thickening agent of the present application, by weight, raw materials include acrylamide 53-60 parts, acrylic acid 45-55 parts, 2-acrylamide-2-methylpropane sulfonic acid 1.5-2 parts, styrene 0.1-1 part and modified polyethylene glycol 3-6 parts.The anti-salt thickening agent, the introduced sulfonic acid group, benzene ring and tannic acid, have excellent salt resistance and stability, can resist fracturing flowback fluid with total salinity ≤1wppm, calcium and magnesium ion concentration ≤500ppm, and fracturing flowback fluid with iron ion concentration within 50ppm, providing a basis for direct use of fracturing flowback fluid.

[Problem] There is provided an inorganic oxide particle-containing composition exhibiting excellent dispersion stability of inorganic oxide particles and excellent salt tolerance. [Solution] An inorganic oxide particle-containing composition, wherein, in image analysis of a frozen sample by cryo-transmission electron microscope observation, the sample being prepared by adding the inorganic oxide particle-containing composition to 4% by mass of salt water such that the concentration of inorganic oxide particles is 0.5% by mass, and rapidly freezing with liquefied ethane, a coefficient of variation, which is a value obtained by dividing a standard deviation of areas of Voronoi partition regions based on an inorganic oxide particle distribution in a region of interest (ROI) by the arithmetic mean of the areas, is 0.1 to 0.7.

This invention relates to the field of rice genetic engineering, specifically providing the application of the OsMT9 protein and its encoding gene in regulating rice salt tolerance. This invention designs a specific targeting... OsMT9 The sgRNA in the coding region of the gene (target sequences shown in SEQ ID NO.4 and SEQ ID NO.5) was extracted, and a gene editing vector was constructed. The gene was then transformed into rice Zhonghua 11 using Agrobacterium-mediated transformation, yielding... OsMT9 Mutants with loss of gene function, such as mutants 22-1 and 23-15. Salt stress experiments showed that the survival rate of these mutants (approximately 43%) was significantly higher than that of the wild type (approximately 6%). This invention provides new gene targets and valuable germplasm resources for salt-tolerant rice breeding, and is of great significance for the utilization of saline-alkali land.

The application relates to the field of agricultural transgenic technology, and particularly discloses GhDBB28 application of a gene in regulating salt tolerance of upland cotton plants, the gene GhDBB28 The nucleotide sequence of the gene is shown as SEQ ID NO. 1; silencing the gene GhDBB28 increases the salt sensitivity of the upland cotton plants. The application reduces the activity of an antioxidant system in the upland cotton plants by silencing the gene GhDBB28 , so that the plants are more sensitive to salt stress, and a scientific basis is provided for constructing a transgenic upland cotton plant with new salt-sensitivity.

To provide means capable of imparting heat tolerance or salt tolerance to plants.SOLUTION: The present invention provides a heat tolerance or salt tolerance improving agent for plants, comprising acetic acid or a salt thereof, or a solvate thereof. A method for improving the heat tolerance or salt tolerance of a plant comprises applying acetic acid or a salt thereof, or a solvate thereof to a plant, a material for application to the plant, or soil, a medium, or a culture solution where the plant grows.SELECTED DRAWING: None

The invention relates to the technical field of plant genetic engineering, and particularly provides application of an AHP2 gene in regulation and control of salt tolerance, plant height, tiller number and grain traits of rice. The invention discloses the multiple-effect function of the AHP2 gene for the first time. Experiments show that the AHP2 gene is knocked out, so that the sensitivity of a rice plant to salt stress is remarkably increased, the survival rate in the seedling stage is reduced, the plant height is reduced, the tiller number is reduced, and the grain length, the grain width, the grain thickness and the thousand grain weight of grains are remarkably reduced; and overexpression of the AHP2 gene can significantly improve the salt tolerance of rice in the seedling stage, reduce ion toxicity under salt stress, and maintain the plant height, tillering and grain traits of the wild type. The AHP2 gene provided by the invention provides a key gene resource and an effective technical approach for realizing collaborative improvement of a plurality of important agronomic traits, and has an important value for coping with soil salinization and cultivating stable and high-yield rice varieties.

To provide a gel composition for external use which forms a gel having excellent salt resistance, acid resistance and alkali resistance and forms a film having no stickiness and excellent rubbing resistance even under high humidity, and to provide a cosmetic containing the same.SOLUTION: The gel composition for external use contains a copolymer (A) containing a constitutional unit represented by formula (a), a constitutional unit represented by formula (b) and a constitutional unit represented by formula (c), and a copolymer (B) containing a constitutional unit represented by formula (a) and a constitutional unit represented by formula (c) or a constitutional unit represented by formula (d). (a) - (CH2-C (R1) - C (= O) - OCH2CH2O - P (= O) (O -) - O (CH2) 2-N + (CH3) 3) - (b) - (CH2-C (R2) - C (= O) - O-X) - (c) - (CH2-C (R3) - C (= O) - O-X) - (d) - (- C () - C (= O) - - CH (OH) - - N + () 3) - CH3 R4 CH2 CH2 OCH2 R5 SELECTED DRAWING: None

The application provides a gold nanoparticle with enhanced stability and a preparation method and application thereof, and belongs to the technical field of gold nanoparticles. The gold nanoparticle with enhanced stability provided by the application is modified on the surface with a hairpin DNA; the nucleotide sequence of the hairpin DNA is shown as SEQ ID NO. 1. The gold nanoparticle of the application is modified by the hairpin DNA, and the stability is significantly improved, specifically including tolerance to a strong acid environment, stable existence in an environment with a pH of 2 or more, and a substantial improvement in salt tolerance, tolerance to 100 mM Mg 2+ of the above ion strength.

The invention belongs to the technical field of oil and gas field fracturing fluid functional materials, and discloses a high-salt-resistant and high-temperature-resistant instant associative thickening agent for fracturing fluid and a preparation method of the high-salt-resistant and high-temperature-resistant instant associative thickening agent. The thickening agent is formed by synergistically associating a ternary hydrophilic functional component, a hydroxyethyl substituted imidazole ring salt-tolerant functional component, a three-component amphiphilic association functional component and a double-grafting modified graphene oxide functional component through physical and chemical interaction. The quadruple synergistic dynamic three-dimensional association network is constructed through carboxyl-sulfonyl hydrogen bonds, long-chain alkyl-polyoxypropylene chain hydrophobic association, graphene oxide sheet layer pi-pi accumulation and double grafting group dynamic interaction. The preparation method adopts a mode of combining component compounding and synergistic association, and the product has excellent high-salt resistance, high-temperature resistance stability, rapid solubility and continuous thickening capacity, is adaptive to a complex underground environment of a deep oil and gas field, and meets the comprehensive performance requirements of fracturing construction on functional materials.

The present application relates to a kind of temperature and salt resistant imbibition agent, by the Mannich reaction of p-xylylenediamine with formaldehyde, formic acid is synthesized to obtain tetramethyl binary tertiary amine intermediate;The intermediate is reacted with alpha-bromine carboxylic acid under alkaline conditions to generate gemini betaine surfactant.Gemini betaine surfactant is compounded with one or two of non-ionic surfactant and small molecule alcohol, and temperature and salt resistant imbibition agent is prepared.The imbibition agent has the characteristics of easy entering matrix channel, anti-absorption, strong wetting reversal ability, temperature resistance can reach 150 DEG C, salt resistance can reach 15×10 4 mg / L, can meet the technical requirements of oil reservoir temperature ≤150 DEG C, salinity ≤15×10 4 mg / L low permeability oil reservoir imbibition oil recovery technology.

The present application relates to the technical field of molecular marker development and molecular marker assisted breeding, and specifically discloses a KASP molecular marker related to salt tolerance of sorghum, a primer and application thereof.The KASP molecular marker is ST1.1 as shown in SEQ ID NO.1, and the base at 100bp of the sequence shown in SEQ ID NO.1 has T / C polymorphism.The KASP molecular marker ST1.1 provided by the present application is used for identifying salt tolerance of sorghum, and through KASP genotyping detection, the genotype of a sample with strong FAM fluorescence signal is T / T, which is salt-tolerant germplasm;the genotype of a sample with strong HEX fluorescence signal is C / C, which is salt-sensitive germplasm.

The application discloses a kind of salt-resistant antibacterial high interfacial activity gemini foam displacement agent and preparation method and application, long-chain alkyl tertiary amine or N-alkyl imidazole and 1,4-dibromo-2-butene are reacted in ethanol to obtain gemini intermediate, then gemini intermediate is reacted with anhydrous sodium sulfite in ionic liquid, and gemini surfactant is obtained.The preparation method of foam displacement agent of the application utilizes ionic liquid as dissolving to realize homogeneous sulfonation, greatly reduces the dosage of sodium sulfite, and the process is simple, easy to operate, short, and high in yield.Compared with traditional gemini foam displacement agent, the foam displacement agent of the application presents a typical cation / zwitterion hybrid structure, and has higher bactericidal and bacteriostatic properties, salt resistance, interfacial activity and foam performance;At the same time, the adsorption of traditional cationic gemini surfactant on the surface of rock is greatly reduced.It provides a new solution for high-salt oil reservoir oil displacement.

The application discloses a high-salt-resistant foaming agent, which can meet the requirements of drilling construction in complex strata by coping with harsh geological conditions in the process of foam drilling and multiple requirements of foam inhibition and foaming capacity. The foaming agent is composed of the following components in percentage by mass: 12-60wt% main foaming agent, 10-30wt% auxiliary foaming agent, and the balance of water. The main foaming agent is a betaine zwitterionic surfactant containing a polyether chain segment, and the auxiliary foaming agent is an amino propionic acid type zwitterionic surfactant. The foaming agent system prepared by the application has the advantages of temperature resistance of 140 DEG C, salt resistance of 360000mg / L NaCl, excellent foaming effect, good salt resistance and good inhibition effect on hydration of mud shale.

The application provides application of desalted plant ash in protection of cultural relics in grotto temples. The application also provides a mixed mortar for reinforcement of the cultural relics in the grotto temples and a preparation method thereof. The multi-scale fiber reinforced mixed mortar provided by the application has mechanical properties matched with the protection requirements of the cultural relics in the grotto temples, low shrinkage, good acid resistance and salt resistance, and can cope with various adverse environmental factors such as dry-wet changes, crack water seepage, acid rain, salt crystallization damage and the like in the preservation of the cultural relics in the grotto temples. The preparation method is simple, raw materials are economical and easy to obtain, and the product is light and flexible. The application can solve the problem of insufficient anti-cracking capacity of the existing protection materials for the cultural relics in the grotto temples, improve the safety and durability of the cultural relics in the grotto temples, and has a comprehensive protection effect.

The invention provides a high-temperature-resistant clean fracturing fluid and a preparation method thereof, and belongs to the technical field of fracturing fluids. The cleaning agent is prepared from the following raw materials in parts by weight: 3-5 parts of a high-temperature-resistant gemini surfactant, 0.5-1 part of a cosurfactant, 5-7 parts of a cleanup additive, 1-2 parts of nano granules and 70-80 parts of water. The high-temperature-resistant clean fracturing fluid prepared by the invention has better high-temperature resistance, salt resistance and shear resistance, good sand-carrying effect and excellent viscoelasticity, avoids the damage of a large number of inorganic ions to the change of original properties of a stratum, is simple in preparation process and wide in raw material source, and has a wide application prospect in oil and gas field exploitation and yield increase.

The invention provides a water shutoff agent and application thereof in temperature resistance and / or salt resistance. The water plugging agent comprises acrylamide, vinyl sulfonate, modified starch, a thickening agent, nano silicon dioxide, a cross-linking agent and water.

The invention relates to the field of molecular biology, in particular to a rice salt stress regulation gene OsNCA1b and application thereof. The CDS sequence of the gene is as shown in SEQ ID NO: 1, and the amino acid sequence of the protein coded by the gene is as shown in SEQ ID NO: 2. By creating OsNCA1b gene overexpression and CRISPRCAS9 editing knockout rice variety Kitaake genetic materials and detecting salt sensitive phenotypes of the genetic materials under the conditions of 100mM NaCl salt stress treatment and 0.5% saline-alkali soil planting, results prove that a CRISPR gene editing strain of OsNCA1b shows salt tolerance compared with wild type rice, an OsNCA1b overexpression strain shows high salt sensitivity, and the OsNCA1b gene overexpression strain shows high salt sensitivity. The gene is indicated to be a rice salt stress negative regulation gene, and gene resources and a technical method are provided for cultivating salt-tolerant rice varieties.

The invention belongs to the technical field of oil and gas well production monitoring, and discloses a preparation method of a high-salt-resistant and high-temperature-resistant tracer agent for an oil and gas well. The preparation method comprises the following steps: performing zwitter-ion modification and epoxy group modification on carbon quantum dots, compounding a high-temperature-resistant cross-linked polymer, constructing a gradient slow-release coating structure, uniformly coating the surface of a fracturing propping agent with a composite coating, and performing vacuum pre-curing and gradient heating curing to obtain a target tracer agent. The tracer prepared through the method is stable in temperature resistance and salt resistance and excellent in coating adhesion and structural integrity, can continuously and stably release tracer signals under the action of formation fluid, effectively improves the monitoring precision, prolongs the service life, can meet the long-term output profile monitoring requirements of deep high-temperature and high-salt oil and gas reservoirs, is well matched with an existing fracturing construction technology, and has the advantages of being high in practicability and wide in application range. And the method has high engineering application value.

The invention provides a temperature-resistant salt-resistant long-acting low-friction coiled tubing drilling and grinding fluid and a preparation method thereof. The method comprises the following steps: preparing a thickening agent for drilling and grinding and a shear-resistant reinforcing agent in proportion to obtain the drilling and grinding fluid; wherein the mass fraction of the thickening agent for drilling and grinding is 0.05-0.3%, the mass fraction of the shear-resistant reinforcing agent is 0.1-0.6%, and the balance is solvent water. According to the prepared drilling and grinding fluid, the supermolecular acting force between molecules is accurately controlled by adding the composite supermolecular acting monomer in a specific proportion, so that temperature resistance and salt resistance are achieved, and long-acting shear resistance of the drilling and grinding fluid is achieved through the positive synergistic effect between the composite supermolecular acting monomer and the specific surfactant along with the change of shear strength; the temperature-resistant, salt-resistant, long-acting and low-friction effects are realized.

The present application relates to a kind of lubricant and its preparation method and use, the raw material of the lubricant includes by mass percentage: natural vegetable oil 60-70%;Polyhydric alcohol 10-20%;Surfactant 5-10%;Extreme pressure antiwear agent 5-15%.The lubricant provided by the present application can meet the operation requirement under the temperature condition above 180 DEG C, while having good salt resistance, can effectively reduce friction resistance, improve rate of penetration, shorten drilling cycle, meet the requirements of environmental protection.

The invention provides an oil and gas reservoir water invasion inhibitor and application thereof. The oil and gas reservoir water invasion inhibitor comprises a modification treatment agent, nano silicon dioxide and alcohol, and has temperature resistance and salt resistance.

The present disclosure provides a chemical bonding lost circulation additive, a composite lost circulation additive comprising same, a drilling fluid, and a use thereof in drilling engineering. The chemical bonding lost circulation additive comprises a core layer and an inorganic material coating the outer surface of the core layer, wherein the material of the core layer has a structure as shown in formula (I). The lost circulation additive of the present application demonstrates a higher one-time plugging success rate, better pressure-bearing capacity, better compatibility with a drilling fluid, stronger temperature resistance, stronger contamination resistance, and stronger salt tolerance.(I)