30results about How to "Avoid secondary generation" patented technology

The invention discloses a multi-branch horizontal well depressurization and heating united mining method for marine hydrates. For the 'congenital' defects that the marine hydrates are distributed in ascattered manner and cannot self flow and get together, based on well type structure improvement of a 'main borehole + a multi-branch horizontal well', an ore body reservoir is hydraulically cut by avertical hydrate layer to improve the hydrate decomposition efficiency and achieve the design objectives of connecting three-dimensional scattered ore bodies and relieving the problems of a large amount of sand, instability of the reservoir and blockage formed by secondary hydrates. The united mining method comprises the following steps: (1) forming a well by a main borehole; (2) drilling a multi-branch horizontal well: forming a plurality of multi-branch horizontal wells, which form a certain included angle and are distributed in a fixed direction, around the main borehole, and arranging thehorizontal wells in the middle region of a hydrate reservoir, wherein joints between the multi-branch horizontal wells and between the multi-branch horizontal wells and the main borehole are all of sleeve and conventional sand control sieve tube structures; (3) performing limited sand control and reservoir supporting; (4) transforming the reservoir by hydraulic jetting; (5) performing heating toprevent blockage.

The invention relates to the field of oxide solid electrolytes, in particular to a method for removing impurities on the surface of a lithium-lanthanum-zirconium-oxygen electrolyte for a solid-state lithium battery. The method involves transferring the lithium-lanthanum-zirconium-oxygen sheet containing impurities into an analysis chamber of an X-ray photoelectron spectrometer , and then in a vacuum environment, carry out gradual heating to remove impurities on the surface of the lithium lanthanum zirconium oxide sheet, and perform in-situ XPS tests on the surface of the lithium lanthanum zirconium oxide sheet during the gradual heating process, and wait for the impurities on the surface of the lithium lanthanum zirconium oxide sheet to be removed Finally, cool the in-situ heating sample stage to room temperature, then transfer it to the glove box connected to the X-ray photoelectron spectrometer, and remove the lithium lanthanum zirconium oxide sheet from the in-situ heating sample stage in the glove box, Obtain pure lithium lanthanum zirconium oxide sheet. The method of the present invention uses vacuum annealing and in-situ XPS testing, and combines the removal of the impurity layer on the surface of the lithium lanthanum zirconium oxide sheet with the monitoring of surface components, thereby realizing high-precision removal of impurities on the surface of the lithium lanthanum zirconium oxide sheet.

The invention discloses a concrete admixture, a preparation method and an application method thereof. The concrete admixture comprises the following components by weight: 30-50 parts of aluminum sulfate, 5-10 parts of potassium metaaluminate, 3-8 parts of magnesium silicate, 1-5 parts of glycerin, 2-5 parts of aluminum fluorosilicate, 5-10 parts of calcium formate, 0.3-0.8 parts of defoamer, 0.2-0.9 parts of organic acid, 2-10 parts of alcohol amine, 0.5-1 part of ester plasticizer, 30-50 parts of water. The dosage of the concrete admixture of the present invention is 3-5% of the cement mass. The application method of the concrete admixture of the present invention: the concrete admixture and the concrete surface enhancer are mixed according to the mass ratio of 1:2-3 and then added to the sprayed concrete at the nozzle, and the amount of the concrete admixture is calculated as 3 based on the cement weight. -5%. The concrete admixture of the invention has the advantages of no alkali metal ion, no corrosion, fast setting speed of concrete, and little strength loss in the later stage.