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122results about How to "Shorten application time" patented technology

DTPA modified material and preparation method for rapid-full-dissociation type DGT (Diffusive gradients in thin films) coupling phase prepared therefrom

The invention relates to a DTPA modified material and a preparation method for a rapid-full-dissociation type DGT (Diffusive gradients in thin films) coupling phase prepared therefrom. DTPA reacts with Mg<2+> and Al<3+> under alkaline conditions. The method comprises the steps: (1) adding 24.4ml of ammonia water (NH4(OH)) and methanol into 73.20ml of water, uniformly mixing the ammonia water, the methanol and the water, then, adding 32.78g of DTPA into the mixture, and thoroughly dissolving DTPA; (2) fetching another beaker, adding 593.34ml of water and 197.78ml of ammonia water into the beaker, uniformly mixing the water and the ammonia water thoroughly; and (3) simultaneously adding solutions obtained in the step (1) and the step (2) into a solution containing MgCl2.6H2O and AlCl3.6H2O so as to prepare the DTPA modified material, carrying out spray drying, then, sieving the dried DTPA modified material by a sieve with the pore size of 200 meshes (75 microns) so as to form a heavy-metal adsorption material for a DGT coupled film, then, adding the heavy-metal adsorption material into a polyacrylamide gel solution, and carrying out reaction at a certain temperature, thereby preparing the DGT coupled film. The gel film prepared by the method disclosed by the invention has the effects of heavy-metal adsorption and short-time full dissociation, and the disadvantage that the dissociation of the former heavy-metal coupling phase is slow and incomplete is overcome. The materials used are cheap and are easily prepared, and no secondary pollution is caused, so that the popularization and application of a DGT technology are facilitated.
Owner:TIANJIN TIANRUN YIKANG ENVIRONMENTAL PROTECTION TECH CO LTD

A method for preparing water-based fracturing fluid by using multi-effect thickener

The invention discloses a method for preparing a water-based fracturing fluid by using a multi-effect thickener, which is characterized in that the fracturing fluid is composed of a base fluid and a cross-linking fluid containing a gel breaker, and is mixed according to the following parts by weight Uniform: 60-99.99 parts of base liquid, 0.01-40.0 parts of cross-linking liquid containing gel breaker; the base liquid is mixed according to the following parts by weight: 99-99.9 parts of water, multi-effect Thickener is 0.1-1.0 parts; the cross-linking liquid containing breaker is mixed according to the following parts by weight: water is 0-99.9 parts, cross-linking agent is 0.1-100.0 parts and breaker is 0.001- 0.1 part. The water-based fracturing fluid formulated with this multi-effect thickener can meet the requirements of use without adding bactericides, clay stabilizers, surfactants, demulsifiers, and foaming agents. Under the condition that the performance indicators of the fracturing fluid are equivalent to those of the traditional fracturing fluid, the operation process is simplified, which is more conducive to improving the quality of the fluid, reducing the conditions required for monitoring, reducing construction procedures and time applications.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD CHANGQING DOWNHOLE TECH CO

Classification and calculation method and apparatus for standard suspension pipe components of nuclear power plant process pipeline

The present invention discloses a classification and calculation method and apparatus for standard suspension pipe components of a nuclear power plant process pipeline. The method comprises: determining the basic attribute and the load performance of the to-be-classified and calculated standard suspension pipe components, classifying the to-be-classified and calculated standard suspension pipe components, and obtaining a simplified model; determining whether the to-be-classified and calculated standard suspension pipe component contains a plane curved rod; and if the plane curved rod is contained, selecting to check a dangerous cross-section, and according to the difference of the R/h ratio of the dangerous cross-section, selecting different formulas to calculate the force and the torque of the dangerous cross-section, and finally carrying out strength check. According to the technical scheme of the present invention, for the shortcoming of the long check cycle in strength calculation by using the existing bracket finite element method, manual check on the bracket strength of the standard suspension pipe components in batch is realized, fast check effects can be exerted on modifying the key section size, the similar type or corresponding pipe clip structure design can be further carried out, and the allowable load can be determined, so that the unnecessary repetitive finite element modeling calculation process is avoided, work efficiency is improved and the construction application time is reduced.
Owner:CHINA NUCLEAR POWER DESIGN COMPANY +2
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