48results about How to "Shorten thickening time" patented technology

The invention relates to a deepwater cementing low-temperature early strength agent. The low-temperature early strength agent comprises the following components in percentage by weight: 33 to 66 percent of alkali metal bromides, 6 to 16 percent of sodium metaaluminate, 15 to 35 percent of alkali metal hydroxides, 8 to 15 percent of silicon dioxide and 0.8 to 1.5 percent of alcamines organics, wherein the alkali metal bromides are a mixture of one, two or more of NaBr, KBr and LiBr; the alkali metal hydroxides are NaOH, KOH or a mixture of the NaOH and KOH; and the alcamines organics are triethanolamine, triisopropanolamine or a mixture of the triethanolamine and triisopropanolamine. The deepwater cementing low-temperature early strength agent has small influence on rheological behaviour of cement paste at low temperature, can prompt the cement paste to be solidified rapidly at low temperature and reach higher early strength, shortens the thickening time of the cement paste at lower temperature and can well meet the requirements of the cementing construction of a surface casing under the conditions of low temperature, shallow gas and the like.

The invention discloses an electroplated diamond grinding wheel capable of orderly arranging abrasive materials, which comprises a grinding wheel base body and an abrasive material layer, wherein blind holes which are orderly arranged are arranged on the surface of the grinding wheel base body, the abrasive material layer comprises abrasive materials and a metal coating, the roots of the abrasive materials are embedded into the blind holes, and the metal coating is deposited on the surface of the grinding wheel base body and in the blind holes and is used to solidify the abrasive materials. The electroplated diamond grinding wheel capable of orderly arranging the abrasive materials achieves to regularly and orderly arrange the abrasive materials on the surface of the grinding wheel base body, and effectively solves the problems that the abrasive materials are rugged and chaotic to distribute in abrasive material layers of traditional diamond grinding wheels. The electroplated diamond grinding wheel capable of orderly arranging the abrasive materials improves holding force of coatings and base bodies to the abrasive materials by utilizing the squeezing and filling actions of diamond abrasive materials to the blind holes, and prolongs life 15%-20%. The abrasive materials are orderly arranged on the surface of the grinding wheel base body to form an excellent chip removal path, prevent having a phenomenon that process workpieces are burnt because of blocking of abrasive dusts, and improve grinding quality.

The invention provides a horizontal well cement paste, which comprises the following components in percentage by weight: 0.5%-2.5% of a flexibilizer GZR, 1%-3% of a GFC expansion agent, 0.04%-0.08% of a GH retarder and the balance of cement, zero free water and low-loss water, wherein the formed set cement does not shrink, and has a certain expansion rate and good mechanical property, and shows excellent tenacity. The set cement is high in breaking strength, and small in crumbly coefficient; the tenacity coefficient is increased; the young modulus of the set cement is decreased; the poisson ratio is increased; the bending radius of the set cement is reduced; a triaxial stress strain curve shows good elastoplasticity; the anti-channeling ability is improved; the thickening time is shortened; the time and the fluid channeling rate of a formation fluid intruding into the cement paste are reduced; the paste is uniform, stable and good in mobility; reduction of annular flow resistance is facilitated; and the displacement efficiency is improved.

The invention relates to a wide spectrum chlorine-free coagulation accelerating early strength agent for oil field oil well cement. The early strength agent comprises the following raw materials in parts by weight: 1 to 1.5 parts of sodium salts, 1 to 1.5 parts of calcium salts, 1 to 1.5 parts of aluminum salts, and 1 to 1.5 parts of other materials, wherein other materials are one or more of hydroxyl apatite, meta-kaolin, magnesium trisilicate, magnesium oxide, strontium sulfate, strontium carbonate, strontium nitrate, lithium carbonate, and oxalic acid. The provided early strength agent is stable, and has an excellent coagulation accelerating performance and early strength property; the early strength is high, the strength development is fast, the thickening transition time and primary-final setting transition time are short; and the early strength agent is suitable for various cement slurry systems such as cement slurry system with a wide temperature range and large temperature difference, AMPS cement slurry system, and the like.

The invention provides a chlorine-free fluid migration prevention early strength agent for oil well cement. The chlorine-free fluid migration prevention early strength agent comprises, by mass, 33-48% of a coagulation accelerator, 20-25% of an expanding agent, 1-2% of an organic early strength agent, and the balance of a filler. The chlorine-free fluid migration prevention early strength agent effectively improves the early strength of set cement, contains no chloride ions or other corrosive ions, has no corrosion effect on sleeves or the set cement, avoids catalytic corrosion of Cl<-> to the sleeves and pollution of the Cl<-> to an underground water source, prolongs the exploitation life of a single well, truly realizes harmlessness of cementing additives, greatly shortens the well cementation cement curing time, shortens the cement curing time, meets performance requirements of cement mortar and the set cement in well cementation construction process, effectively protects sleeves, protects oil and gas reservoirs, and improves the productivity of the single well.

The invention provides a well cementation material suitable for a low-temperature environment and a production method of the well cementation material. The well cementation material is prepared by mainly mixing 75-89% of portland cement clinker, 1-8% of sulphoaluminate cement clinker, 1-8% of high-alumina cement clinker, 2-4% of dihydrate gypsum, 0.5-1.2% of a dispersing agent and 1-4% of a retarder by weight. The well cementation material has the advantages that selected raw materials of raw meal cooperate with one another, on the basis of meeting the early strength, the later strength is ensured, the hydration rate is also slowed down to a certain extent, the setting time is prolonged, time guarantee is provided for radial grouting, and the risk ratio of blockage caused by the generationof cement plugs during grouting is reduced.

The invention provides a clean fracturing fluid, which comprises the following ingredients (by weight): 2-4% of a densifier, 0-8% of potassium chloride, 0-10% of a modifier, 2-5% of a temperature-resistant reinforcing agent and the rest of fluid preparation water. The fracturing fluid can adopt acidic or alkaline fresh water or highly saline acid fracturing backflow fluid. After mechanical impurity removal treatment, highly saline backflow fluid can be used in fracturing fluid preparation of the next well without adjusting fluid preparation water quality in advance. Then, water quality chemical treatment process is omitted, and operating cost is greatly reduced. During site operation, efficient sand-carrying of the fracturing fluid is realized through a continuous mixing mode. Therefore, acid fracturing modification of a reservoir stratum and no falling of spent liquor during the whole oil and gas testing process are achieved, and ''zero pollution'' of borehole operation site is realized. The invention is helpful for cleaning and efficient production.

The invention discloses a water absorption lightening material for cementing wells. The material comprises, in weight percent, 20-30% of fly ash with different particle diameters, 30-40% of volcanic ash with different particle diameters, 2-5% of inorganic gel, 1-4% of nano-silicon dioxide and 25-35% of sepiolite powder. The raw materials are mixed to form the material. The particle diameter ranging from 10 nanometers to 100 nanometers accounts for 1%-2%; the particle diameter ranging from 1 micrometer to 10 micrometers accounts for 10%-20%; the particle diameter ranging from 10 micrometers to50 micrometers accounts for 40%-60%; the particle diameter ranging from 50 micrometers to 150 micrometers accounts for 10%-30%. Cement paste prepared from the water absorption lightening material canform more compact cement stones, the strength of low-density cement paste can be remarkably improved, the cement paste has a certain suspension stability, and the sedimentation stability of the cementpaste is improved.

The invention discloses biological ash portland cement with low probability of cracking and a production method of the biological ash portland cement. The biological ash portland cement is prepared from the following components by weight percent: 55-75% of ordinary Portland cement clinker, 4-8% of flue gas desulfurization gypsum, 4.5-10.0% of humus, 7-15% of biological ash, 1-3% of polyvinyl alcohol, 5-10% of gravel powder, 5-8% of zeolite powder and 0.2-1.0% of a biological bacterium additive. The biological ash portland cement can permeate into fine seams among cement seams, stratum and a sleeve joint, has favorable cement squeezing, leakage stopping and tiny gap filling functions for easy-to-leak layers, vertically fractured stratum or porous stratum, and meets the actual application demands; and the compactness and the strength of cement paste are enhanced, and the cement paste based on biological ash is a very good culture medium of biological bacteria.

The invention belongs to the technical field of tunnel waterproofness and impermeability, and provides a tunnel grouting process in a salt rock stratum. The tunnel grouting process in the salt rock stratum comprises the steps that grouting holes are formed, specifically, the grouting holes are formed in the periphery of a tunnel hole, and anti-corrosion grouting pipes are embedded; slurry is prepared, specifically, ordinary cement slurry and ultra-fine cement slurry are prepared with brine of certain concentration; the slurry is grouted, specifically, when the underground water volume is linear strand water or above, the ordinary cement slurry and the ultra-fine cement slurry are sequentially grouted; and when the underground water volume is drip water or below, the ultra-fine cement slurry is grouted. According to the tunnel grouting process, salt rocks are not dissolved in the grouting process, meanwhile the surrounding rock cracks can be effectively blocked, an effective sealing ring can be formed, the salt rock is prevented from being dissolved by underground water, and the intrusion of underground salt water into the tunnel structure is prevented.

The invention provides a method for producing aerated concrete blocks by lime wet pulping. The method comprises the following steps of adding quartz sand and quicklime into a ball mill, adding water,mixing, and carrying out ball milling to prepare slurry at 38-40 DEG C; pumping slurry into a burdening stirrer, adding Portland cement, uniformly stirring, adding aluminum powder, a polycarboxylate superplasticizer and an oxidized paraffin soap bubble stabilizer, uniformly stirring and mixing components, discharging the slurry into a mold, and carrying out injection molding; and after injection molding, feeding the mixture and the mold into a constant-temperature chamber together, and obtaining the concrete block after gas generation, thickening and hardening. By adopting the method, in the thickening stage after gas generation is completed, the uniformly distributed calcium hydrate system reduces the existence of intermediate water and increases adsorbed water, so that the slurry thickening speed is increased, the pouring stability is improved, the thickening time is shortened, and the production efficiency is improved.

The invention discloses flushing liquid, a preparation method thereof, and flushing liquid for deepwater cementing, and belongs to the field of cementing operation. The flushing liquid is prepared from a diluent and a cleaning agent, wherein the mass ratio of the diluent to the cleaning agent is (75 to 95):(18 to 24); the diluent is prepared from water, sulfonated sodium tannin, sodium hexametaphosphate and hydroxyethyl cellulose, wherein the mass ratio of the water to the sulfonated sodium tannin to the sodium hexametaphosphate to the hydroxyethyl cellulose is (75 to 85):(8 to 12):(6 to 10):(1 to 4); and the cleaning agent is prepared from ethylene glycol, fatty alcohol-polyoxyethylene ether and octaphenyl polyoxyethyiene, and the mass ratio of the ethylene glycol to the fatty alcohol-polyoxyethylene ether to the octaphenyl polyoxyethyiene is (65 to 75):(15 to 25):(5 to 15). When being applied to the flushing liquid for deepwater cementing, the flushing liquid can dilute a mixed section of the flushing liquid for deepwater cementing and drilling liquid and/or cement slurry, slurry mixing of the cement slurry and the drilling liquid is effectively prevented, flocculation of the cement slurry is avoided, the thickening time is shortened, it is ensured that the mixed section has the good rheological property, false filter cakes of the drilling liquid, a casing and a well wall annulus are effectively flushed, and the flushing liquid can be applied to deepwater cementing operation at 0-30 DEG C.

The invention discloses a friction-resistant thermal-insulation composite coating. The friction-resistant thermal-insulation composite coating comprises, by weight, 50-80 parts of cement, 11-16 parts of polyethylene methyl ether methacrylate, 9-14 parts of Meretrix meretrix Linnaeus shell powder, 3-9 parts of ham shell powder, 5-6 parts of Mactra veneriformis shell powder, 3-7 parts of a bactericide, 3-9 parts of an organosilicon-modified epoxy resin, 10-16 parts of carbamate, 3-5 parts of thermoplastic resin, 5-8 parts of polyisoprene rubber, 3-8 parts of an antimony-based composite eco-friendly fire retardant and 5-9 parts of triisocyanurate. The friction-resistant thermal-insulation composite coating utilizes composite cement and lime, can shorten slurry thickening time, can fully keep foam produced by a foaming agent and aluminum powder so that material thermal insulation properties are guaranteed, simultaneously uses physical and chemical foaming agents and is conducive to slurry heat insulation performance improvement.

The invention discloses an environment-friendly foam building material. The environment-friendly foam building material comprises, by weight, 15-18 parts of cement, 18-23 parts of calcium carbonate, 1-3 parts of carbon celluloses, 2-3 parts of wetting agents, 0.1-0.8 part of silicon carbide, 10-14 parts of phenol, 1-3 parts of polyurethane, 22-25 parts of organic silicon-modified epoxy resin, 0.5-1.3 parts of preservatives, 20-25 parts of kaolin, 0.2-0.5 part of dispersing agents and 3-5 parts of pigment. The environment-friendly foam building material has the advantages that the kaolin, the cement and lime are combined with one another, accordingly, the slurry thickening time can be shortened, and the heat preservation and heat insulation performance of the environment-friendly foam building material can be advantageously improved; environment-friendly effects can be realized by the environment-friendly foam building material, other components are added into the environment-friendly foam building material, and accordingly the stability and the frost resistance of the environment-friendly foam building material can be effectively guaranteed in service procedures.

The invention discloses a lightweight building material which is characterized by comprising the following substances, by weight, 50-80 parts of cement, 5-9 parts of a mixed solvent, 6-8 parts of an inorganic thickening agent, 11-18 parts of clam shell powder, 2-8 parts of Scapharca subcrenata shell powder, 9-17 parts of white clamshell powder, 1-6 parts of polypropylene, 3-8 parts of nano-calcium sulfate, 3-9 parts of a titanate coupling agent, 2-8 parts of abietyl resin acid, 20-32 parts of organosilicone modified epoxy resin, 1-9 parts of laminated structured mica powder, 1-3 parts of hollow glass beads, 1-6 parts of linear low density polyethylene, 2-3 parts of white oil, 3-9 parts of fiber and 3-9 parts of a foaming agent. By the use of composite cement and lime, slurry thickening time can be shortened, and bubbles coming from the foaming agent and linear low density polyethylene can be fully maintained so as to guarantee thermal insulation property of the material; and by simultaneous application of two foaming agents, namely physical and chemical foaming agents, it helps to raise thermal insulation performance of the slurry.