37results about How to "Reduce the lubrication coefficient" patented technology

The invention provides a drilling fluid lubricant prepared from waste plant oil and a preparation method thereof. The lubricant is composed of the following raw materials in parts by weight: 70 to 80 parts of waste plant oil, 10 to 20 pats of lower alcohols, 1 to 5 parts of surfactant, and 1 to 5 parts of high temperature resistant processing agent. The preparation method comprises the following steps: step a, carrying out a pretreatment on raw materials: removing impurities from waste plant oil; step b, carrying out esterification conversion: adding lower alcohols and the waste plant oil preprocessed in step a into a reactor with/without a catalyst to carry out esterification reactions or ester exchange reactions, wherein the reaction temperature is 60 to 120 DEG C, and the reaction time is 3 to 8 hours; step c, refining and separating the reaction products: precipitating and separating the reaction products obtained in the step b, and then refining the reaction products to obtain a refined product; step d, carrying out performance improvement: adding the surfactant and the high temperature resistant processing agent so as to obtain a finished product.

An environment-friendly high-density solid-free weighting agent comprises components in parts by weight as follows: 0.02-0.05 parts of a dispersant, 0.3-1 part of a tackifier, 0.5-1.2 parts of chelating agent, 0.6-2 parts of a corrosion inhibitor and the balance of soluble weighting materials, wherein the dispersant is one or two of sodium polyacrylate and copolymer of phosphono and carboxylic acid; the tackifier is one or more of chitosan, agar, polyacrylamide, xanthan gum and hydroxypropyl methyl cellulose; the chelating agent is one or two of aminophosphonic acid chelate resin and ethylenediamine tetraacetic acid disodium; the corrosion inhibitor is one or two of multiple polycarboxylate and sodium gluconate; the soluble weighting materials are one or more of potassium formate, potassium citrate, potassium acetate, potassium silicate and potassium sulfate. The process steps are as follows: the raw materials are taken in weight proportion, mixed and uniformly stirred; the raw materials are added to water and dissolved at the high temperature of 70-80 DEG C; a product is evaporated to dryness, and solid is obtained; the obtained solid is ground into powder, and the solid weighting agent is obtained.

The invention relates to a temperature-resistance drilling fluid drill-feeding plugging agent and its preparation method, the drill-feeding plugging agent comprises the following components by weight: 30-80 parts of vegetable fiber, 10-40 parts of mineral fiber, 10-40 parts of fruit shell, 0-10 parts of powdered steatile, and 3-10 parts of silicon-based gel deformation particles. The silicon-based gel deformation particles enable emulsification and dispersion of 1.4-2.5 parts of vinyltriethoxysilane monomer according to weight to an aqueous solution composed of 18-24 parts of acrylamide, 0.0025-0.005 parts of N,N'-methylene bisacrylamide, 0.7-1.25 parts of OP-10 and 0.1-0.17 parts of sodium dodecyl benzene sulfonate, 0.003 parts of disodium ethylene diamine tetraacetate, 0.009-0.12 parts of ammonium persulfate and 0.009-0.012 parts of sodium bisulfate, a process of micellar copolymerization is carried out, a polymer is dried, granulated and crushed to obtain the silicon-based gel deformation particles with average particle size of 80-200 meshes; easy-leakage highly-permeable stratum and micro crack are effectively plugged, rheological parameter of the drilling fluid is not influenced, frictional resistance coefficient of the drilling fluid is reduced, a storage layer is protected, and the drill-feeding plugging agent is suitable for plugging the easy-leakage stratum and the storage layer.

The invention discloses a boring well wall stabilizer which is mainly used for solving the technical problem that storage layer is damaged due to unstable well wall and expansion of clay during the boring process; the well wall stabilizer consists of 20-35 parts of diallyldimethylammonium chloride, 2-5 parts of diallyldimethylammonium chloride-acrylamide polymer, 1-5 parts of non-ionic surfactant OP-10, 1-2 parts of fluoride-bearing alkyl ethoxy ether alcohol non-ionic surfactant, 1-3 parts of cellulose, 1-5 parts of KCl and 45-74 parts of water, according to the weight parts. The stabilizer can stabilize the well wall, greatly reduces the expansion rate of the clay at storage layer and eliminates the damages on the storage layer.

The invention discloses a graphene resistance-reducing agent for a fracturing fluid. The graphene resistance-reducing agent comprises the following raw materials by weight: 1 to 50 parts of graphene, 5 to 60 parts of a surfactant and 1 to 60 parts of a wetting agent, wherein the surfactant is a nonionic surfactant or anionic surfactant and is one or more selected from a group consisting of alkylphenol polyoxyethylene ether, stearyl alcohol polyoxyethylene polyoxypropylene ether, polyether phosphate, dodecylbenzene sulfonic acid and fatty alcohol ether sodium sulfate-AES. The graphene resistance-reducing agent has the advantages of good resistance-reducing performance, few components, small filtration loss, high viscosity, environment friendliness and good compatibility; through addition of graphene or modified graphene, a lubrication coefficient can be effectively decreased, frictional resistance between the fracturing fluid and a crack wall is lowered and filtration loss is reduced; thus, construction pressure in the process of fracture is reduced, and the graphene resistance-reducing agent is applicable to large-scale large-discharge volume fracture technology. The graphene or modified graphene resistance-reducing agent has good compatibility with a reservoir in the process of fracture and acidification, does not contain mineral oil and poses no pollution to the reservoir and environment.

The invention discloses a low-fluorescence lubricant for drilling fluid and a preparation method of the low-fluorescence lubricant, and solves the problems that an existing low-fluorescence lubricanthas poor salt pollution resistance, does not have calcium ion pollution resistance and has greatly reduced lubricating property in a high-temperature environment. The lubricant comprises the raw material of a mixed solution composed of, in parts by mass, 25-30% of industrial oleic acid, 15-20% of industrial coconut oil, 35-45% of industrial white oil, 10% of softened water and 5-10% of an additive.

The invention provides an environment-friendly high-temperature-resistant and high-salt-resistant lubricant for water-based drilling fluid and a preparation method and application thereof.The preparation method comprises the following steps that polyhydric alcohol is heated to a first reaction temperature, boric acid is added, a heat preservation reaction is conducted under nitrogen protection, and an intermediate product is obtained; directly adding long-chain fatty acid and a catalyst into the obtained intermediate product, and heating to a second reaction temperature for reaction; and after the reaction is finished, cooling to obtain the environment-friendly high-temperature-resistant and high-salt-resistant lubricant. The lubricant can effectively reduce the lubrication coefficient of the drilling fluid under the conditions of high temperature and high salt, is good in environmental protection property and biodegradability, can be applied to drilling of a deep stratum complex structure well, and solves the problems of large friction resistance and serious backing pressure in the process of drilling a deep horizontal well, a highly-deviated well and the like by using the existing water-based drilling fluid.

The invention relates to a silica gel film plating windshield wiper rubber strip and a preparation method thereof. The silica gel film plating windshield wiper rubber strip is prepared from the following ingredients in parts by weight: 30 to 50 parts of 70-DEG C silicon rubber raw materials, 10 to 30 parts of 60-DEG C silicon rubber raw materials, 20 to 40 parts of 60-DEG C powder rubber raw materials, 7 to 14 parts of talcum powder, 1 to 1.5 parts of simethicone, 1 to 1.7 parts of color masterbatch and 2 to 4 parts of vulcanizing agents. The silica gel film plating windshield wiper rubber strip has the advantages that the formula is simple; the preparation cost is low; the excellent mechanical intensity, ozone resistance and atmosphere aging resistance performance are realized; the friction coefficient is low; the use temperature is wide; the long-time use can be realized at -40 DEG C (or lower temperature) to +100 DEG C (or higher temperature).

The invention provides a surfactant for drilling fluid and a preparation method of the surfactant. The surfactant is prepared from raw materials as follows: mineral oil, n-butyl alcohol oleate, liquidparaffin, methyl silicone oil, an emulsifier and ethyl p-hydroxybenzoate, wherein the mineral oil is one or two of No.5 white oil and No.7 white oil. The preparation method comprises steps as follows: the mineral oil, n-butyl alcohol oleate, liquid paraffin, methyl silicone oil and the emulsifier are added to a reactor and are sufficiently mixed and stirred; the materials in the reactor are heated and emulsified; ethyl p-hydroxybenzoate is added at certain temperature, the materials are sufficiently mixed and stirred, and the surfactant is obtained after cooling. The surfactant is good in performance and prepared with a simple process, has higher resistance to compression and guarantees that the drilling fluid has lower circulating density and higher suspended rock debris carrying capacity at the shaft bottom under high pressure, complex underground accidents are avoided or reduced effectively, and drilling quality and efficiency are improved; the surfactant still has good performanceat high temperature, can be resistant to 10% compound brine pollution and has good inhibiting performance for lubrication.

The invention relates to a drag inhibitor/reducer for a drilling fluid and a preparation method of the drag inhibitor/reducer. The drag inhibitor/reducer is prepared from the following components in percentage by weight: 0.5-2% of cationic gemini surfactant, 1-2% of quaternary ammonium cationic surfactant, 0.5-1% of vulcanized oil, 20-25% of glucoside water solution and the balance of white oil. The preparation method comprises the steps of adding the vulcanized oil into the white oil at the temperature of 50-60 DEG C, and stirring for 1-2h; then, sequentially adding the cationic gemini surfactant and the quaternary ammonium cationic surfactant, and stirring for 2-4h; next, adding the glucoside water solution, and stirring for 2-4h; and finally, controlling the temperature at 100-120 DEG C, and concentrating for 1h to obtain the drag inhibitor/reducer for the drilling fluid. The drag inhibitor/reducer is suitable for reducing frictional resistance in the drilling processes of horizontal wells and large-displacement wells, and has a better effect in solid-free, low-solid and clay-free drilling fluid systems.