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639results about How to "Slow growth rate" patented technology

Low-quality heavy oil and residual oil hydrotreatment combined process capable of prolonging service life of catalyst

The invention relates to a low-quality heavy oil and residual oil hydrotreatment combined process. The low-quality heavy oil and residual oil hydrotreatment combined process is characterized in that firstly a heavy oil raw material is subjected to hydrogenation pretreatment by a slurry bed, after the gas-liquid separation is carried out, a liquid product is subjected to hydro-upgrading through a stationary bed, wherein a hydrogenation pretreatment part of the slurry bed comprises a slurry bed hydrogenation reactor and a slurry bed hydrogenation catalyst, reactors used for a hydro-upgrading part of the slurry bed mainly comprise two up-flow deferrization and decalcification reactors connected in parallel, one up-flow demetalization reactor, one fixed bed desulfurization reactor and one stationary bed denitrification reactor sequentially. The low-quality heavy oil and residual oil hydrotreatment combined process has the advantages of being capable of improving the hydrogenation impurity removal capacity of the catalyst, prolonging the life cycle of the catalyst, treating residual oil with high metal content, high sulfur, high nitrogen and high asphaltene and effectively slowing down the ascending velocity of pressure drop of the reactors, so that the long-period operation of the device is realized.
Owner:PETROCHINA CO LTD

Turbo-type underground hydraulic oscillator

The invention relates to a turbo-type underground hydraulic oscillator, and belongs to the technical field of petroleum underground equipment. The turbo-type underground hydraulic oscillator comprises an upper shell, a lower shell, an upper joint, a lower joint, a spline housing and a middle joint, wherein the upper shell is connected with the lower shell by screw thread by the middle joint, the lower joint is mounted by screw threads at the end of the lower shell, and the upper joint is mounted by screw threads at the end of the upper shell via the spline housing; a turbine shaft is mounted in the lower shell by an end cap of the turbine shaft and a thrust bearing. The hydraulic oscillator is driven by a turbine and does not have transverse oscillation caused by eccentric motion, so that the hydraulic oscillator does not have an effect on signal acquisition work of tools such as an LWD (Logging-While-Drilling) tool, an MWD (Measurement-While-Drilling) tool and the like; through own axial periodic high-frequency creeping, the friction condition between a drilling string and a borehole wall is changed, and the increasing speed of the coefficient of instantaneous sliding friction when a drill bit is elastically fed by the drilling string is lowered, thereby reducing friction resistance and improving mechanical drilling speed.
Owner:YANGTZE UNIVERSITY

Three-dimensional cultivation method for grape vines and Chinese herbs

The invention relates to the technical field of agriculture planting, in particular to a three-dimensional cultivation method for grape vines and Chinese herbs. Long-cane grape vine planting is adopted, reasonable distribution is performed on the density of grape vine planting, the Chinese herbs which are sciophilous and resistant to moisture are planted in a grape vine forest in an interplanting mode, a drip tube mode is adopted for replenishing nutrients, and through the reasonable combination between the grape vines and the Chinese herbs, the reasonable combination between grape vines and grape vines and the reasonable combination between the Chinese herbs and Chinese herbs, and it is ensured that growth density between the grape vines and the Chinese medicine herbs is appropriate. Nutritional ingredients in the forest are sufficiently used for improving the quality of the grape forests and the Chinese herbs. Through reasonable preparation of base fertilizers, nutrient replenishing between the grape vines and the Chinese herbs is guaranteed, and the base fertilizers are used for meeting the requirement for adding elements into the glucose component, and meanwhile the nutrient requirement of the Chinese herbs in the forest is met; through the reasonable arrangement of a built shed formwork and reasonable relay interplanting of intercropping in the forest, the aesthetics value of a base is greatly enhanced, and the base has significant ornamental value and practical value.
Owner:遵义市李龙基葡萄种植农民专业合作社
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