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

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 surfactantOP-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 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 discloses a low fluorescent lubricating agent for drilling fluid and a method for preparing the low fluorescent lubricating agent. The low fluorescent lubricating agent is prepared from the following materials by weight percent: 30%-70% of swill-cooked dirty oil, 10%-30% of natural fatty acid, 10%-30% of vegetable oil, 1%-10% of oleic acid, 1%-3% of dodecylbenzene sulfonic acid and 1%-3% of polyvinyl alcohol. The method for preparing the low fluorescent lubricating agent comprises the following steps: accurately weighing the materials in a ratio, then putting the materials into a reactor, heating to 40-60 DEG C and stirring for 1-2hours at constant temperature. The method is simple in polymerization process and is suitable for industrial production; the low fluorescent lubricating agent for the drilling fluid is high in performance cost ratio, small in dosage and excellent in lubricating performance, is suitable for various water-base mud systems; and the low fluorescent lubricating agent is fluorescent-free and pollution-free, does not interfere geological logging work, dose not foam, dose not stick sieves, dose not influence other drilling fluid performances and dose not increase viscosity and water loss.

The invention discloses an illegal cooking oil lubricant and a preparation method thereof. The illegal cooking oil lubricant comprises the following components in percentage by weight: 40%-60% of illegal cooking oil, 0.5%-1.5% of sodium sulfite, 1%-3% of sorbide oleate, 0.02%-0.04% of antioxidants, 0.2%-0.3% of extreme-pressure antiwear agents, 0.05%-0.1% of formaldehyde, 1.0%-1.2% of sodium hydroxide and the balance of water. Through the illegal cooking oil lubricant disclosed by the invention, the problem that torque and friction resistance are reduced through lubrication in the drilling process of a horizontal well is effectively solved, moreover, a new way is provided for the recycling of the illegal cooking oil, and the preparation cost of the lubricant can be reduced.

The invention discloses a solid lubricant and its preparation method and application. The solid lubricant is prepared by mixing the following raw materials in parts by weight: 18-24 parts of dipentaerythritol, 28-32 parts of polytetramethylene glycol, and SG100 38~48 parts, 6~12 parts of thiourea. When preparing, add polytetramethylene glycol and SG100 into the mixing container, heat to 70-90°C, after the two melt into liquid, keep the temperature at 70-90°C, slowly add dipentaerythritol and thiourea under stirring condition, Stir for 1.5 to 2 hours to make it fully mixed and react, and cool to room temperature after the reaction to obtain a solid lubricant. The lubricant is in solid form, which is convenient for storage and transportation, has good lubricating performance, has a significant effect of reducing friction, can effectively improve the lubricating performance of drilling fluid, and has a low fluorescence level, does not affect geological logging, is non-toxic and harmless, and is environmentally friendly. The preparation method is simple, the conditions are mild, and the preparation cost is low.

The invention relates to a high-temperature-resistant environment-protecting type drilling fluid lubricating agent. The high-temperature-resistant environment-protecting type drilling fluid lubricating agent mainly solves the problems that in the existing drilling process, the lubricating property is not high, high-temperature resistance and high-pressure resistance are low, and the drilling exploitation requirements of a deep well and an extradeep well are difficult to meet. The high-temperature-resistant environment-protecting type drilling fluid lubricating agent is characterized by comprising the following components in percentage by mass: 20 to 35 percent of plant oil, 20 to 40 percent of silicon oil, 5 to 10 percent of an anti-wear agent, 10 to 20 percent of a surfactant and 15 to 30percent of water. The preparation method of the drilling fluid lubricating agent comprises the following steps: (1) adding the silicon oil into the plant oil and performing stirring reaction; (2) mixing the surfactant and the anti-wear agent mixture according to the proportion in advance, performing stirring reaction, and mixing with the base oil in the step (1); (3) adding the water according tothe proportion, continuously performing stirring reaction and filtering to obtain a product. The high-temperature-resistant environment-protecting type drilling fluid lubricating agent can resist 150-DEG C temperature, is simple in synthesis process and convenient for on-site application, meets the environment-protecting requirement and is a high-performance liquid lubricating agent.

The invention discloses a low-fluorescence lubricant for drilling fluid and a preparation method thereof, which solves the problems that the existing low-fluorescence lubricant has poor anti-salt pollution ability, does not have anti-calcium ion pollution ability, and the lubricating performance will be greatly reduced in a high-temperature environment. The raw material of the lubricant is a mixed liquid composed of industrial oleic acid, industrial coconut oil, industrial white oil, demineralized water and additives; the mass fraction of industrial oleic acid is 25-30%; the mass fraction of industrial coconut oil is 15-30%. 20%, the mass fraction of industrial white oil is 35-45%, the mass fraction of demineralized water is 10%, and the mass fraction of additives is 5-10%.

The invention discloses a compound resin lubricating anti-collapse agent for drilling fluid. The compound resin lubricating anti-collapse agent is prepared from the following raw materials in parts bymass: 40-60 parts of vegetable oil for industry purpose, 1-2 parts of an alkali solution, 15-30 parts of petroleum resin and 5-8 parts of a surfactant. The compound resin lubricating anti-collapse agent takes the vegetable oil for industry purpose as a raw material, contains the petroleum resin product and has low production cost, no or low toxicity on organisms and no pollution to the environment. A prepared product can effectively reduce friction resistance and torque in a drilling process, reduces occurrence of sticking of drill tools and other complicated accidents in a down hole, has good lubricating properties and strong temperature resistance as compared with other drilling fluid treatment agents, can effectively substitute for bitumen products, is more favorable for large-scale popularization and application, has obvious economic benefits, improves the anti-collapse sealing performance of a drilling fluid system, and effectively solves the problems of low lubricating coefficient of drilling fluid and insufficient sealing performance of the anti-collapse agent.