82results about How to "Good anti-collapse effect" patented technology

The present invention discloses one kind of high temperature recyclable microbubble drilling and completing fluid, which includes basic slurry comprising bentonite 1-2 (in weight portions, the same below), salt tolerant clay 3-5, sodium carbonate 0.2-0.3 and water 100; and additives comprising high temperature inhibitor 3-5, high temperature tackifier 2-5, high temperature filter loss reducing agent 3-6, high temperature salt resisting filter loss reducing tackifier 1-3, flow form regulator 1-3, high temperature foaming agent 2-5 and high temperature foam stabilizer 1-2.5. The high temperature recyclable microbubble drilling and completing fluid has excellent high temperature performance, high carrying, suspending capacity in low pressure deep well, and functions of inhibiting the hydrating expansion of mudstone and protecting oil and gas reservoir, is suitable for different types of high temperature stratum. It is applied in well drilling and well completing construction for low pressure and low permeation stratum.

The invention relates to a strong-inhibition drilling fluid system, comprising the following components by mass percent of 2.5-4.5% of bentonite slurry, 0.1-0.3% of alkaline regulator, 0.3-2.0% of shale inhibitor, 0.2-0.4% of metal ion polymer, 2.0-5.0% of walchowite, 2.0-5.0% of sulfomethal phenolaldehy resin, 1.0-3.0% of cation emulsified asphalt, 0.5-3.0% of lubricating agent, 0.2-0.8% of emulsifier, 2.0-8.0% of crude oil, and 1.0-3.0% of calcium carbonate superfine powder according to 100% of water. The compound in a general formula (I) is also provided; R1 is H or CH3; R2 is H, CH3 or C2H5; and X is an integer between 2 and 20 and applied to the shale inhibitor. The compound and the cation emulsified asphalt are applied to the drilling liquid system; the drilling liquid system is strong in shale inhibition; the shale recovery rate can be up to 90.33% and is improved by over 35.02% in comparison with that of water shale; the high temperature resistance can be up to 150 DEG C; the lubricating friction coefficients before and after aging respectively are smaller than 0.1; the strong-inhibition drilling fluid system is strong in capacity of resisting poor soil, salt and calcium contamination, strong in rejection capability, and good in blocking effect; the API (American petroleum institute) water loss of the drilling fluid is smaller than 4.5mL, and the HTHP (high temperature and high pressure) water loss is smaller than 12mL.

The invention discloses an anti-collapse circulating microfoam drilling fluid or completion fluid, which consists of (A) base slurry: bentonite 2-4.5 or 6-10, soda ash 0.2-0.3 water 100 parts by weight. (B) Additives: ① Anti-slump agent 2-5, ② Cementing agent 3-5, ③ Viscosifier 0.5-3, ④ Fluid loss reducer 1-3, ⑤ Foaming agent 0.5-5, foam stabilizer 0.5- 2.5, flow regulator 0.5-2.5. The invention has strong anti-slump function and strong adaptability, can be used as both drilling fluid and completion fluid, can be applied to low-pressure carbonate formations, and low-pressure, low-permeability mudstone formations and rock formations It is mainly used in drilling and completion of low-pressure, low-permeability and easy-collapse formations.

The invention relates to the technical field of bra cup pad, and specifically relates to a vertical cotton breathable bra cup pad with a silica gel net and a preparation method thereof. The vertical cotton breathable bra cup pad comprises a vertical cotton outer layer and a vertical cotton inner layer; a vertical cotton interlayer is arranged between the vertical cotton outer layer and the vertical cotton inner layer; an adhesive layer is arranged between the vertical cotton interlayer and the vertical cotton inner layer; and a silica gel net layer is arranged between the vertical cotton outer layer and the vertical cotton interlayer. The vertical cotton breathable bra cup pad is prepared by a combined technology of hot pressing and cold pressing. The pad is made of vertical cotton, and is light, comfortable, and breathable. A silica gel layer is arranged between vertical cotton layers, the performance of the pad on resisting water washing is enhanced, the anti-collapse effect is good, three-dimensional effect of the cup pad is long-lasting and stable, and the deformation is difficult to happen.

The invention provides a composition for an anti-collapse drilling fluid, the anti-collapse drilling fluid, and an anti-collapse method. The composition for the anti-collapse drilling fluid comprises bentonite, a filtrate reducer and a viscosity reducer, wherein the anti-collapse drilling fluid further comprises a reverse wetting agent and a reverse wetting agent auxiliary, the reverse wetting agent is a copolymer of acrylate monomer and styrene, and the reverse wetting agent auxiliary comprises aliphatic amine and asphalt. The anti-collapse drilling fluid provided by the invention is excellent in anti-collapse performance.

The invention discloses a microemulsion polymerization strong coater for a drilling fluid and a preparation method of the strong coater. The key point of the technical scheme disclosed by the invention is as follows: the microemulsion polymerization strong coater for the drilling fluid is a copolymer which is formed from potassium acrylate, acrylamide and 2-acrylamidyl-2-methyl propanesulfonic acid by virtue of free radical polymerization, wherein the molecular weight of the copolymer is 15000 thousand to 24000 thousand. The structure of the copolymer is as shown in the specification, wherein l:m:n is equal to a:b:c, a is greater than or equal to 95 but less than 100, b is greater than 0 but less than or equal to 5 and c is greater than 0 but less than or equal to 5. The invention further discloses the preparation method of the microemulsion polymerization strong coater for the drilling fluid. The strong coater disclosed by the invention is high in polymerization efficiency, and the polymerized product is stable in performance and convenient to apply and is widely applied in the drilling process of an oil field. The strong coater can be used for greatly improving the rejection capability and the coating ability of the drilling fluid so as to form a drilling fluid system with a stable performance.

The invention provides modified alkyd resin and a preparation method thereof. According to the method, alkyd compounds react to obtain the modified alkyd resin. The alkyd compounds comprise, by weight, 25-35 parts of tertiary carbonate glycidyl ester, 38-42 parts of glycerol, 190-230 parts of soya oil acid, 25-35 parts of ethanediol, 240-280 parts of phthalic anhydride, 30-38 parts of trimethylolpropane, 80-120 parts of pentaerythritol, 16-40 parts of agents with water, 1-2 parts of subtraction colour antioxidants, 230-260 parts of diluted solvent, and 0.5-1.5 parts of antiager. Conventional raw materials of the soya oil acid, the pentaerythritol and the like are adopted to prepare the alkyd resin, and the tertiary carbonate glycidyl ester is adopted to modify the alkyd resin, so a paint film performances well in the aspects of gloss, definition, collapse resistance and the like. The invention further provides two-component primer.

The invention discloses a drill liquid lubricating anti-sloughing agent and preparation method thereof. The lubricating anti-sloughing agent is composed of liquid wax 10 to 30 parts, non-ionic surface activator 1 to 3 parts, polyatomic alcohol 5 to 15 parts, polymer 0.5 to 1 part according to 100 weight parts, and water as residue. The preparation method is: putting liquid wax, non-ionic surface activator, and polyatomic alcohol into reactor, heating the mixture to 60 deg C. to 80 deg C., agitating the mixture for 30min with agitation speed controlled in the ranged of 1000 to 2000 rpm; adding polymer-dissolved polymer into the reactor, agitating the mixture for 60 to 120 min continuously at 60 to 80 deg C. with agitation speed controlled in 1000 to 2000 rpm, cooling it to room temperature, to obtain the product of lubricating anti-sloughing agent. The lubricating anti-sloughing agent of the invention is provided with good stability, with excellent lubricating, anti-sloughing and oil gas layer-protecting effects in drilling liquid, and good environmental protection property without fluorescence, toxic pollution. The adopted materials are easy to obtain. The preparation method is simple, easy to implement with low cost.

The invention relates to a water-based drilling fluid for shale gas wells and a production method thereof. The method sequentially includes the following steps of: (1) preparing the following raw materials: 1000 parts of water, 45-50 parts of sodium bentonite, 500 parts of a water-soluble inhibition weighting agent II; 100 parts of a water-soluble inhibition weighting agent III; 15-20 parts of aninhibiting and anti-collapse agent non-fluorescence white asphalt, 10-20 parts of solid polymeric alcohol, 10-20 parts of a filtrate reducer, 0.5-1 part of a polyamine inhibitor, 20-30 parts of ultrafine calcium carbonate, 10-25 parts of an extreme pressure lubricant, and 0.5-1 part of a coating inhibitor; (2) mixing the sodium bentonite and water, and performing curing for at least 24h at normaltemperature; and (3) adding the water-soluble inhibition weighting agent II and water-soluble inhibition weighting agent III under stirring, then adding the inhibiting and anti-collapse agent non-fluorescence white asphalt and the solid polymeric alcohol, then adding the filtrate reducer and the polyamine inhibitor, then adding the ultrafine calcium carbonate and the extreme pressure lubricant, finally adding the coating inhibitor, and then adjusting the pH value and density. The drilling fluid has the advantages of high plugging properties, strong inhibition and excellent lubricating properties, and can meet the safe drilling requirements of shale gas horizontal wells.

The invention particularly discloses a strongly adsorbent solid lubricant for drilling fluid. The strongly adsorbent solid lubricant comprises the following components in parts by weight: 100 to 300 parts of reaction carrier, 2 to 15 parts of organic solvent, 15 to 50 parts of monomers, 50 to 200 parts of penetrant, 0.01 to 0.05 part of initiator, 1 to 5 parts of surfactant and 100 to 300 parts of water. The strongly adsorbent solid lubricant for the drilling fluid, which is disclosed by the invention, is easily available in raw materials and simple in synthesis method, has better adsorption performance compared with a common solid lubricant, is not easily removed by solid control equipment, can form a strong adsorption film on a metal surface and a solid particle surface of the drilling fluid, and simultaneously has the capability of improving the filtration reduction performance and blocking to prevent collapse.

The invention relates to a strong-inhibition and strong-cementation well wall stabilizer and a preparation method thereof. The strong-inhibition and strong-cementation well wall stabilizer is characterized by containing a branched polyethyleneimine structure as a main chain and a catechol group grafted to the main chain. The strong-inhibition and strong-cementation well wall stabilizer has the beneficial effects that the strong-inhibition and strong-cementation well wall stabilizer has better well wall stabilization effect, is convenient in control on preparation process, simple to operate andstable in quality of a product and has better action effect when being used under the condition with the temperature being 150 DEG C, and a water-based drilling fluid system formed by taking strong-inhibition and strong-cementation well wall stabilizer as a key treating agent has relatively good rheological property, rejection capability and anti-sloughing property; and a drilling fluid treatingagent which can strongly inhibit hydration swelling of shales, can block consolidated rocks at the same time, improves the mechanical property of the shales and strengthens the pressure-bearing capacity of the well wall can effectively push a water-based drilling fluid to replace an oil-based drilling fluid, more efficiently keeps the well wall stablity and has an important theoretical and practical significance.

The invention discloses a positive-charged polyglycol anti-collapse drilling fluid which mainly solves the problems of low anti-collapse capacity and narrow application range in the water-based drilling fluid in the prior art. The positive-charged polyglycol anti-collapse drilling fluid comprises the following components in parts by weight: 2-4 parts of sodium bentonite, 0.1-0.2 part of sodium carbonate, 3-5 parts of positive-charged polyglycol, 2-4 parts of high-molecule inhibitor, 2-4 parts of positive-charged wall protector, 0.5-3 parts of fluid loss additive for drilling fluids, 1-2 parts of plugging agent for drilling fluids, 4-6 parts of low-fluorescence water-based lubricant RY-838, 2-3 parts of low-fluorescence sulfonated asphalt and 100 parts of water. By blending the weighting agent, the density of the drilling fluid reaches 1.30-1.45 g/cm<3>. The positive-charged polyglycol anti-collapse drilling fluid has the advantages of high anti-collapse capacity, longer stability period, high temperature resistance, high solid-phase content, wide application range and the like.

The invention discloses a drilling flushing liquid with excellent anti-collapse performance and a preparation method thereof. Each cubic meter of the drilling flushing liquid is prepared from, by weight, 12.5-50 kg of a matrix, 0.8-1.2 kg of sodium hydroxide, 1.8-2.2 kg of carboxymethyl cellulose, 0.4-0.6 kg of potassium polyacrylate, 5-15 kg of a fluid loss reducer and 1.2-1.8 kg of a liquid lubricant, wherein the matrix is selected from bentonite and/or calcium carbonate. According to the stratum conditions of a Qinghai Muli coal field, the anti-collapse drilling flushing liquid which is more simplified in formula but better in effect is obtained through a new test method and has the advantages that type selection and proportioning are scientific and reasonable, the anti-collapse performance is excellent, the preparation process is simple, and the production cost is low.

The invention discloses modified polyanionic ammonium salt for drilling fluid and a preparation method of the modified polyanionic ammonium salt. The ammonium salt is prepared from following materials of hydrolyzed polyacrylonitrile ammonium salt, epoxy chloropropane, water, dodecyl dimethyl allyl ammonium chloride, crylic acid, 2-acrylamide-2-methyl-propanesulfonic acid, acrylamide, ammonium persulfate and sodium sulfite. The preparation method comprises the following steps of: weighing water, hydrolyzed polyacrylonitrile ammonium salt, epoxy chloropropane, dodecyl dimethyl allyl ammonium chloride, ammonium persulfate and sodium sulfite; putting into a reaction kettle, sealing, heating, reacting and cooling; adding the weighed crylic acid, the 2-acrylamide-2-methyl-propanesulfonic acid and acrylamide to the cooled reaction kettle, stirring to completely dissolve, sealing and leading in nitrogen, heating and reacting under protection of the nitrogen; and discharging to obtain a product by vacuulizing and drying. The modified polyanionic ammonium salt can resist super-high temperature of 240 DEG C, resists statured salt water, compound saline water and seawater, can effectively reduce the filter loss of the drilling fluid, does not tackify, and is good in anti-collapse performance.

The invention provides a bitter drabanemerosa hebecarpa bean vegetable jelly type environment-friendly slurry, comprising the following components: 6-12g of bitter drabanemerosa hebecarpa bean vegetable jelly, 0.2-0.6g of hydrolyzed polyacrylamide with at least molecular weight of 12 million, 0.2-0.6g of sodium hydroxide and 1,000ml of water. The invention has ready availability of raw materials, stable performance, excellent rheological characteristics, good capability of lubrication, leak stoppage, suspending to remove debris and resisting dilution shearing, simple fabrication operation, low cost and good environment-friendly performance. The invention also provides a method for preparing the bitter drabanemerosa hebecarpa bean vegetable jelly type environment-friendly slurry.