38results about How to "Long protection period" patented technology

The invention discloses a preparation method of a solid corrosion-inhibition scale-inhibition bar used for an oil field, which relates to a production method of a chemical medicament used for the oil field. The preparation method comprises the following steps of: (1) mixing 30 to 40 percent of 2-phosphonobutane-1,2,4-tricarboxylic acid, 10 to 15 percent of polyethylene glycol, 10 to 15 percent ofsodium hexametaphosphate, 15 to 25 percent of Span-60 and 20 to 30 percent of stearic acid evenly, wherein the percent is the mass percent of the sum of each component occupying all the components; and (2) putting all the evenly mixed components into a bar type mold, pressing into a bar type by using a press machine and forming a finished product, wherein the pressure applied by the press machineis 15 to 20 tons. The method has the advantages of simple preparation process, even mixing of the components, trouble saving and labor saving, so that the method is suitable for mass and industrialized production and large-scale popularization and application.

The invention discloses a solid corrosion and scale inhibitor for an oil field, which relates to the technical field of chemical medicine reagents used for the oil field. The solid corrosion and scale inhibitor comprises the following ingredients: 2-phosphonic acid butane 1, 2, 4-tricarboxylic acid PBTCA, polyethyleneglycol, sodium hexametahposphate, span-60 and stearic acid, wherein each ingredient accounts for the mass percent of the sum of all the ingredients as follow: 30 percent to 40 percent of 2-phosphonic acid butane 1, 2, 4-tricarboxylic acid PBTCA, 10 percent to 15 percent of polyethyleneglycol, 10 percent to 15 percent of sodium hexametahposphate, 15 to 25 percent of span-60 and 20 percent to 30 percent of stearic acid. The invention is particularly suitable for well tubes of oil-gas wells with server corrosion and scale conditions, and has good corrosion and scale inhibition effects on underground pipe posts and equipment.

The invention discloses an environment-friendly anti-rust oil composition for bearings. The environment-friendly anti-rust oil composition comprises the following components in percentage by weight: 2%-8% of petroleum calcium sulfonate, 0.5%-8% of oxidized paraffin calcium soap, 0.5%-3% of oleoyl sarcosine tallow amine salt, 1%-4% of a film-forming agent and the balance of machine oil. The anti-rust oil composition disclosed by the invention has good wettability and blocking property, has excellent damp-heat resistance and salt fog protection resistance on bearings of high-carbon alloy steel, copper alloy or steel and copper assemblies, has good sweat corrosion resistance, does not contain a volatile hydrocarbon compound, or barium and other heavy metals, and is good in environmental protection capability and safe to use. According to the environment-friendly anti-rust oil composition for the bearings disclosed by the invention, a film layer is good in protective performance and long in protective cycle, and especially has excellent damp-heat resistance and salt fog protection resistance on high-carbon bearing steel materials and bearing steel / copper alloy bearing assemblies; the anti-rust oil film has good sweat corrosion resistance; and the oiled bearings have good anti-pollution and anticorrosion properties.

The invention discloses a surface modified nickel based sulfur resistant hydrogenation catalyst and a preparation method thereof, and belongs to the technical field of nickel-based catalysts. The catalyst is characterized by comprising an inorganic oxide carrier with a surface and holes in preset sizes, and a complex shielding layer suitable for the interaction with the surface, with the size being in interaction with the carrier and active metal. By applying the shielding layer onto the surfaces and the holes of the carrier and active components, the shielding layer complex is converted into metal, metal oxide and a mixture of the metal and the metal oxide through calcinations, and the catalyst is prepared through hydrogen reduction. The catalyst greatly improves the activity in shielding metal components contained in the catalyst, reduces the content of shielding metal, and guarantees the quantity of active centers in catalyst metal.