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52results about How to "Low risk" patented technology

Method for determining medium-and-large-radius track of two-dimensional small-pre-target-displacement horizontal well

ActiveCN103993830AAdd counter-displacementIncrease drilling footageDirectional drillingTrue vertical depthWellhead
The invention relates to a method for determining a medium-and-large-radius track of a two-dimensional small-pre-target-displacement horizontal well. The method sequentially comprises the following steps that the position of a first target spot, the position of a second target spot and the position of a wellhead are determined, the displacement and the true vertical depth of the first target spot and the displacement and the true vertical depth of the second target spot are obtained, a third-part horizontal segment rail is determined, and the third horizontal segment track extends along a connecting line between the first target spot and the second target spot; a second-part angle-gain landing track is determined upwards with the first target spot as a terminal point, and the second-part angle-gain landing track comprises a first angle-gain circular-arc segment, an angle-holding linear segment and a second angle-gain circular-arc segment; a reverse angle-building track is determined with the wellhead as a starting point and the track midpoint as a terminal point, the reverse angle-building track comprises a plumb shaft segment, a reverse angle-building circular-arc segment, an angle-holding linear segment and an angle-dropping circular-arc segment, and the radius values of all the circular-arc segments range from 191 m to 286.5 m. According to the method for determining the medium-and-large-radius track of the two-dimensional small-pre-target-displacement horizontal well, the pre-target displacement is increased through reverse angle building, and the contradiction between the complex ground conditions and well location optimization of the horizontal well with the medium-and-large-radius track can be solved.
Owner:CHINA PETROLEUM & CHEM CORP +1

Concrete lightweight aggregate and preparation method thereof

ActiveCN107601936AImprove water dissolution resistanceReduce spreadSludgeExpanded clay aggregate
The invention discloses concrete lightweight aggregate and a preparation method thereof. The concrete lightweight aggregate is prepared from the following raw materials by mass percent: 60-80% of oil-base drilling cuttings, 10-30% of civil sludge, 0.8-7% of a pore-forming agent and 9-9.3% of water. The preparation method comprises the following steps: (1) evenly mixing the dry oil-base drilling cuttings with the civil sludge and the pore-forming agent, and then carrying out ball-milling on the obtained mixture to obtain a raw material; (2) putting the prepared raw material into an automatic ball forming mill for balling, evenly sprinkling water in a balling process, aging the prepared green body after balling is finished, and then drying; (3) calcining the dried green body, and then cooling the product along with a furnace so as to obtain the concrete lightweight aggregate. The main raw materials of the concrete ceramsite lightweight aggregate prepared by the method are solid wastes, and all technical indexes of the concrete ceramsite lightweight aggregate meet the related requirements of standard in China; furthermore, the concrete lightweight aggregate is good in leaching resistance, does not cause secondary pollution and low in cost, thus having better industrial application prospect.
Owner:YANGTZE NORMAL UNIVERSITY

Concrete surface protection treatment method based on plasma hot-spraying technology

ActiveCN111575630AImprove frost resistanceImprove impermeability and durabilityMolten spray coatingWeather resistanceInorganic materials
The invention provides a concrete surface protection treatment method based on a plasma hot-spraying technology. According to the treatment method, firstly, high-pressure air at the temperature of 80DEG C to 100 DEG C is utilized to dry the surface of concrete; next, the high-pressure air is utilized to wrap and carry particles to roughen the surface of the concrete; then, high-pressure air at the temperature of 100 DEG C to 150 DEG C is utilized to flush and preheat the surface of the concrete; and finally, by the aid of plasma hot-spray equipment, a powdery inorganic non-metallic raw material with the particle size of 20 microns to 120 microns is used for hot-spraying an inorganic material protection layer on the surface of the concrete by adjusting the powder feeding rate, plasma power, the airflow rate, the moving velocity, the spraying distance and other parameters. Through the treatment method, the anti-freezing and anti-permeating abilities of the concrete are improved, the defects of poor weather fastness and short service life in traditional organic material protection coating brushing are overcome, and the method can be widely applied to surface protection on concrete prefabricated parts and cast-in-place concrete structures.
Owner:CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION

Exhalation valve arrangement for ventilator apparatus with apparatus for receiving pressure sensor

An exhalation valve device (22) for a ventilator apparatus for the artificial respiration of patients can be flowed through in an exhalation flow direction (E) and comprises: an upstream breathing gasduct (54), which extends along a first duct path (K1) and is or can be connected to a section of the exhalation line coming from the patient, a downstream breathing gas duct (58), which extends alonga second duct path (K2) and is or can be connected to a breathing gas sink (U), a valve assembly (63) having a valve body (64) and a valve seat (66), which valve assembly is provided between the upstream and the downstream breathing gas ducts (54, 58) such that, in the event of a predetermined first breathing gas overpressure in the upstream gas duct (54) relative to the downstream gas duct (58),the valve assembly permits an exhalatory breathing gas flow from the upstream breathing gas duct (54) to the downstream breathing gas duct (58) and, in the event of a predetermined second breathing gas overpressure in the downstream breathing gas duct (58) relative to the upstream breathing gas duct (54), the valve assembly blocks a gas flow from the downstream breathing gas duct (58) to the upstream breathing gas duct (54). According to the invention, the exhalation valve arrangement (22) has a bypass chamber (74) that communicates via flow mechanics with the upstream breathing gas duct (54)and extends from the upstream breathing gas duct (54) to the region of the downstream breathing gas duct (58) and there is designed for coupling a gas pressure sensor (80).
Owner:HAMILTON MEDICAL AG

Method for improving grassland productivity on basis of livestock-poultry-pasture coupling mode

The invention relates to a method for improving grassland productivity on the basis of a livestock-poultry-pasture coupling mode. The method includes the following steps that deteriorated grassland with the vegetation coverage degree not higher than 50% or grassland with the grasshopper density being 10 grasshoppers per square meter or above is selected for stocking, and it is required that the height of a plant community is smaller than 30 cm to guarantee that poultry can see poultry houses; the stocking density and the scale of the poultry and distribution positions of the poultry houses are determined according to the use area of the selected grassland and the poultry raising aim, and the distance between the poultry houses are adjusted according to the determined stocking density of the poultry; after young poultry are subjected to heat supplication stopping and then freely raised on the selected grassland by means of the poultry houses, sufficiency drinking water supply is guaranteed in the daytime, and feed is supplemented at night; the poultry houses are moved every 1-2 months according to vegetation conditions and soil conditions of grazing pasture, and accumulated faeces are evenly scattered around the poultry houses; poultry eggs and poultry products are harvested; after the stocking period of the poultry ends, added forage is harvested and/or cattle and sheep are grazed.
Owner:INST OF BOTANY CHINESE ACAD OF SCI
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