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

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%.

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 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 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.