33results about How to "Low fluorescence level" patented technology

The invention discloses a compound type vegetable oil lubricating agent for a drilling fluid and a preparation method thereof. The compound type vegetable oil lubricating agent for the drilling fluid with favorable oiliness, no toxicity, low fluorescent level and favorable bearing and thermostabilized performance is prepared by taking a vegetable oil leftover which is low in price and easy to obtain, lauryl sodium sulfate, sbane 80, sodium carboxymethylcellulose, polyvinylpyrrolidone and the like as main raw materials, adding a solid lubricating agent which is graphite or serpentine and usinga simple and environment-friendly production method, so that not only the production cost is greatly reduced, but also any toxic and harmful action on the environment is not generated in the production process. The compound type vegetable oil lubricating agent for the drilling fluid is not only applied to drilling, but also can be applied to producing wells, can effectively inhibit the hydrous expansion of mud shale, consolidate the well wall and prevent the sticking accidents and is especially suitable for industrial production on a large scale.

The invention discloses a mud cake adhesion lubricant for water-base drilling fluid, and the mud cake adhesion lubricant comprises 0.1-15wt% of mud cake adhesion lubrication improver, 0-4wt% of triethanolamine, 0.01-20wt% of surfactant and the balance of oil, wherein the chemical formula of the mud cake adhesion lubrication improver is (RCO2)[x]M or (RCO2)[x-y](OH)[y]M, wherein the R in the formula is a saturated straight chain or branched chain alkyl group of C8-C20, or an unsaturated straight chain or branched chain alkyl group of C8-C20; M is <+2>, <+3> or <+4> valent metal ions; x is equal to 2-4, y is equal to 0-2, and x is greater than y; the HLB of the surfactant is greater than 8; the oil is mineral oil, plant oil, waste engine oil, plant oil-modified oil or recovered gutter oil. The mud cake adhesion lubricant for water-base drilling fluid has excellent mud cake adhesion lubrication capability, and the reduction rate of the mud cake adhesion lubrication coefficient can achieve more than 70%.

A high-efficient antisticking lubricant for drilling fluid has a technical scheme that the lubricant is obtained by mixing five components of white oil which is used as a main raw material, oleic acid and methyl oleate which are used as auxiliary materials, a defoamer and an extreme pressure agent which are used as regulators, wherein the weight percent ranges of the components are 30%-70% of white oil, 18%-30% of oleic acid, 10%-20% of methyl oleate, 1%-10% of defoamer and 1%-10% of extreme pressure agents. The lubricant of the invention has the advantages of extreme pressure lubrication, sticking resistance, less fluorescence grade, and the like, does not cause index change of drilling fluid, has lubrication effect on hard surface to soft surface (drilling tool to mud cake) and hard surface to hard surface (drilling tool to rock), has good lubrication effect, and thus is a good lubricant for polymer drilling fluid systems.

The invention discloses a lubricant for drilling fluids, which is composed of the following components in percentage by mass: 20-40% of base oil, 40-60% of fatty acid ester, 5-10% of surfactant and 3-10% of defoaming agent. The preparation method of the lubricant comprises the following steps: adding the base oil and fatty acid ester into a reaction kettle, heating to 50-80 DEG C, stirring at high speed for 0.5-1 hour, slowly adding the surfactant, stirring at high speed for 0.5-1 hour, heating to 70-100 DEG C, adding the defoaming agent, continuing stirring for 0.5-1 hour, and cooling.

The invention relates to a nano film-embedded emulsion lubricant and mainly solves the problems about high frictional resistance of a horizontal well, serious backing pressure and poor lubricating effect of drilling fluid. The nano film-embedded emulsion lubricant comprises the following components in percentage by weight: 10 to 30 percent of modified paraffin, 3 to 11 percent of a compound emulsifier, 0.5 to 3 percent of an alkalinity modifier, 0.5 to 2 percent of nano graphite powder and the balance of water. The nano film-embedded emulsion lubricant provides an emulsion lubricant which has low fluorescence, is provided with a nano ball material and has capability of forming an anti-adhesion lubricating film between the stratum and a drilling tool; a prepared drilling fluid system has a good lubricating property; a mud cake is fine; the filter loss is low; the class of florescence is low; the nano film-embedded emulsion lubricant has excellent thermal stability and cold-resisting stability; drilling efficiency of the horizontal well is greatly improved.

The invention relates to a biomimetic liquid lubricating agent for drilling fluid and a preparation method thereof. The biomimetic liquid lubricating agent is prepared from the following raw materials including oleic acid, emulsifiers, glycerol, epoxy propane and antifoaming agents, wherein the emulsifiers are one or several materials selected from triethanolamine, aluminum stearate and span-80. The preparation method comprises the following technical steps of weight the raw materials of the oleic acid, the emulsifiers, the glycerol and the epoxy propane; adding the raw materials into a reaction kettle so that the raw materials are sufficiently mixed, and a mixed material is obtained; performing an esterification process on the mixed material at the esterification temperature of 200 to 250 DEG C for the esterification time being 1 to 3h; performing cooling to obtain an esterification product; performing an emulsification process on the esterification product at the emulsification temperature of 80 to 100 DEG C for the emulsification time being 1 to 2h; lowering the temperature of a product after completing the emulsification process; adding the antifoaming agents so that the materials are sufficiently and uniformly mixed; discharging the materials after the temperature is lowered to room temperature. The biomimetic liquid lubricating agent can resist high temperature being 200 DEG C or higher; the friction coefficient of the drilling fluid can be reduced; the adhesion coefficient of the drilling fluid can also be reduced; the fluorescence grade is low.

The invention discloses an oil-based drilling fluid lubricant which is prepared from the following components by mass percent: 0.1% to 15% of mud cake adhesion lubricating improver, 0.5% to 30% of extreme pressure additive, 0% to 4% of flow type regulator and the balance of white oil. The invention further provides a preparation method of the oil-based drilling fluid lubricant. The oil-based drilling fluid lubricant has a good extreme pressure lubricating ability and a good mud cake adhesion lubricating ability. When the adding amount of the lubricant in a drilling fluid reaches 0.5% (percent by volume), the mud cake adhesion friction reducing rate is between 56% and 78%, and the extreme pressure friction reducing rate is between 76% and 96%. In addition, the oil-based drilling fluid lubricant is strong in high-temperature resistance and low in fluorescence grade.

The invention relates to a modified kitchen waste grease lubricant for drilling fluid and a preparation method thereof, and belongs to the technical field of lubricants. The lubricant comprises the following raw materials in parts by weight: 60-90 parts of kitchen waste grease, 10-40 parts of a sodium hydroxide water solution (30%), 10-30 parts of fuming sulfuric acid, 1-2 parts of an anti-wear agent, 0.5-1 part of an antioxidant, 0.2-0.3 part of an ultraviolet light absorber, 4-6 parts of an extreme pressure additive and 0.2-0.3 part of a preservative. The sulfonated fatty acid lubricant is prepared by chemically modifying the kitchen waste grease, the raw materials are cheap and easily available, the production cost and the fluorescence level of the lubricant are reduced, the preparationmethod is simple, few by-products are produced, no pollution is caused to the environment, and the modified kitchen waste grease has obvious high-temperature resistance and salt resistance effects.

The invention belongs to the field of additives for drilling fluids, and concretely discloses an environmentally-friendly low-fluorescence plugging agent used for drilling fluids, and a preparation method thereof. The plugging agent is prepared from, by weight, 35-45 parts of C1618 fatty alcohol, 40-45 parts of stearic acid, 2-6 parts of polyethylene glycol, 0.5-1.5 parts of p-toluenesulfonic acid, 0.5-1.5 parts of alkylphenol polyoxyethylene, 10-16 parts of lightweight CaCO3 and 10-15 parts of cotton fibers. The plugging agent has the advantages of low fluorescence grade, biodegradability, facilitation of environmental protection, and integration of the excellent plugging and anti-sloughing performances and the oil reservoir protection effect of an asphalt product.

The invention discloses anti-sloughing filtrate reducer white asphalt for drilling fluid. The anti-sloughing filtrate reducer white asphalt is prepared by processing the following raw materials in parts by weight: 3-10 parts of mixed particles, 0.3-2 parts of resin filler and 2-7 parts of copolymerization additive, wherein the mixed particles are used for carrying out surface treatment on light calcium carbonate through a silane coupling agent; then adding the light calcium carbonate subjected to surface treatment into a reaction intermediate of high-carbon fatty acid, high-carbon fatty alcohol and polyhydric alcohol and then performing reaction so that the dispersion and combination effects of the modified light calcium carbonate in the liquid-phase mixture are improved; the resin filleris prepared by taking a resin raw material obtained by reaction of styrene and acrylamide as a coating material to coat cross-linked micro-particles, the effects of lubricating and filling large-aperture gaps are achieved, and early-stage filtration loss is reduced; the high-temperature-resistant resin is used for wrapping so that cross-linked particles can be prevented from being distributed on the side wall of a drilled hole in a centralized manner when the drilling fluid is used, and the normal use of the anti-collapse filtrate reducer is not influenced.

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 discloses a plant clay oil drilling fluid lubricant, and a preparation method thereof, and belongs to the technical field of oil-gas well engineering. The plant clay oil drilling fluid lubricant is prepared from, by mass, 60 to 80% of plant clay oil, 10 to 30% of a fatty acid ester, and 5 to 10% of a surfactant. The plant clay oil drilling fluid lubricant is low in fluorescence grade, and excellent in lubrication performance; and the raw materials are cheap and easily available.

The invention discloses a liquid non-fluorescent lubricant for well drilling. The lubricant is prepared from 50-60 parts of white oil, 6-12 parts of sulfonated palm oil, 4-8 parts of vegetable oil acid, 5-12 parts of octaphenyl polyoxyethyiene-10, 12-18 parts of sorbide oleate, 6-15 parts of chloralkane. The lubricant is prepared by taking the white oil as an oil base, the sulfonated palm oil as asynthesized anionic surfactant and the octaphenyl polyoxyethyiene-10, the sorbide oleate and the like which are taken as a nonionic surfactant are used as auxiliary materials, finally the efficient and environmentally friendly non-fluorescent lubricant capable of resisting salt is obtained, and the extreme pressure lubrication coefficient can reach 98%; the viscosity coefficient of a mud cake canreach 70%; the lubricant can be used for horizontal wells and large inclined wells, the compatibility between the lubricant and other drilling fluid materials is good, and the lubricant has good lubricating performance in the drilling fluid system; the non-fluorescent grade or the fluorescence grade is extremely low, and the lubricant can better cooperate with the specific operation of geologicallogging and the like.

The invention discloses a low-fluorescence oil-base pipe-freeing agent and a preparation method thereof. The invention aims at providing the pipe-freeing agent with low filtration loss, good fluidity, good pipe-freeing performance, low solidifying point, and good stability, and a preparation method thereof. The agent is composed of a pipe-freeing liquid and a rapid penetration agent. The pipe-freeing liquid comprises, by weight: 30-40% of diesel oil, 30-40% of engine oil, 4-5% of polyamide, 4-5% of organic earth, 1.5-2% of oil-soluble yellow, and 6-8% of water. The addition amount of the rapid penetration agent is 1.5-2% of the weight of the pipe-freeing liquid. When the pipe-freeing agent provided by the invention is used for treating a pipe-stuck situation, the penetration performance is high, soil cake falling speed is high, and wetting performance is good. A soaking time is commonly 1-2h. A field construction process is simple, pipe-freeing comprehensive cost is low, and pipe-stuck accident can be rapidly and effectively solved.

The invention relates to drilling liquid for use in the drilling process of oil exploration wells and production wells and belongs to low-density oil-based drilling fluid. The drilling fluid overcomes the drawbacks of serious pollution and strong Jamin effects of the conventional oil-based drilling fluid in hypotonic and water sensitive reservoir strata. The drilling fluid is characterized by containing low-density base oil, oil thickener, oil swelling agent, oil dispersible particle calcium carbonate, calcium oxide and oil soluble high-temperature-resistance fluid loss additive. The drilling fluid does not contain any water phase, the breaking voltage of the drilling fluid is high, the viscosity of the drilling fluid is proper, and the filtration is small (all filtrate is oil). The drilling fluid has the characteristics of high electrical stability, high temperature resistance, high water, soil and salt pollution resistance, excellent emulsification effect at high temperature and the like. The stabilization time of the drilling fluid can reach 20 to 40 hours.

The invention relates to a low-fluorescent-oil-based lubricant for a drilling fluid based on reclaimed oil and derivatives thereof, which is prepared through the following steps: (1) an esterification process and (2) a fluorescence disappearing process. The lubricant has favorable biodegradability and lubrication property, high oxidation resistance, excellent high-temperature-resistant lubrication property and low florescence level, and is less prone to cause fluid loss.

The invention relates to a carrier of an active ingredient of a defoaming agent and a preparation method thereof. The carrier of the active ingredient of the defoaming agent is characterized by comprising the following components in part by weight: 1,000 to 2,000 parts of vegetable fatty acid and 100 to 800 parts of lower fatty alcohol. When in use, the carrier has no side effect on other performance of drilling fluid; the use amount is small; when the addition of the carrier reaches 0.2 percent, the density recovery ratio of the drilling fluid can reach over 98 percent; and the carrier is convenient to use and high in dissolving and dispersing speed and can be added into slurry directly.

The invention provides solid polyalcohol for oilfield drilling fluid and a preparation method and application thereof. The method comprises the steps of mixing aliphatic amine, epoxyethane and epoxypropane according to the weight ratio of (1-1.4): (390-450): (260-300), and reacting for 3.5-4.5 hours in the presence of a catalyst at the pressure of 0.2-0.4MPa and the temperature of 155-160 DEG C, thereby obtaining the product, namely the solid polyalcohol for the drilling fluid. The polyalcohol provided by the invention is solid and can be applied to exploratory wells and development wells; compared with the prior art, the polyalcohol has the advantages of good lubricating property, low turbidity point, strong inhibitive ability, low fluorescence level, no biological toxicity, no environmental pollution, convenience in transportation and use, strong compatibility, relatively strong filtration reduction capability and the like.

The invention discloses a low-foam low-fluorescence lubricant for a drilling fluid and a preparation method thereof, and relates to the technical field of a lubricant for a water-based drilling fluid. The lubricant is characterized by comprising the following ingredients, by weight, 20-40% of base oil, 40-60% of fatty acid ester, 5-10% of a surfactant and 3-10% of an antifoaming agent. the preparation method of the lubricant comprises the following steps: respectively adding the above base oil and fatty acid ester according to the above ratio into a reaction still, warming to 50-80 DEG C, stirring at high speed for 0.5h, slowly adding the surfactant, stirring at high speed for 0.5h, warming to 70-100 DEG C, adding the antifoaming agent and continuously stirring for 0.5h, and cooling to obtain the low-foam low-fluorescence lubricant for the drilling fluid. As the lubricant has low fluorescence level, the lubricant has no negative effects on geological logging, the condition that real rock debris cannot be dredged out on logging will not happen, and discovery of new hydrocarbon reservoir also will not be influenced. In addition, the lubricant has poor foaming property such that the lubricant has no adverse effects on properties of well mud.

The invention discloses a lubricant for drilling fluid and a preparation method thereof. The lubricant for drilling fluid is prepared from long-chain fatty acid, light diesel oil and stearate, the long-chain fatty acid is one or a mixture of at least two of oleic acid, palmitic acid and stearic acid in any proportion, the light diesel oil is one or a mixture of at least two of 5 # diesel oil, 0 # diesel oil and-10 # diesel oil in any proportion, and the stearate is one or a mixture of at least two of aluminum stearate, magnesium stearate, calcium stearate and barium stearate in any proportion. The lubricant for the drilling fluid has the advantages of being good in lubricating property, low in fluorescence level, low in foaming rate and good in compatibility with various common drilling fluid additives, the preparation method of the lubricant is simple, the production cost is low, and industrial production is easy.

The invention relates to a carrier of an active ingredient of a defoaming agent and a preparation method thereof. The carrier of the active ingredient of the defoaming agent is characterized by comprising the following components in part by weight: 1,000 to 2,000 parts of vegetable fatty acid and 100 to 800 parts of lower fatty alcohol. When in use, the carrier has no side effect on other performance of drilling fluid; the use amount is small; when the addition of the carrier reaches 0.2 percent, the density recovery ratio of the drilling fluid can reach over 98 percent; and the carrier is convenient to use and high in dissolving and dispersing speed and can be added into slurry directly.