49results about How to "High pulping rate" patented technology

The invention discloses a preparation of underwater grouting grout based on soft-base large immersed tunnel foundation and a grouting process thereof. The foundation is formed by a 60-cm thick macadam foundation base and a 40-cm thick sodium bentonite mortar foundation and is capable of meeting requirements for tunnel foundation rigidity and requirements for base seismic resistance and water flow scouring resistance. The grout is composed of cement, fine sand, coal ash and sodium bentonite. The grouting process is improved, and pipe inside grouting of embedded grouting holes is adopted. Therefore, large ships are not required to work on river face, underwater operation of divers and navigation risks are reduced, construction safety is greatly improved, and construction cost is reduced. The secondary grouting technology is first adopted in the field of the immersed tunnel to reduce uneven sedimentation in future operation stage of projects. The grouting process provides a reference guide and an experience guide for large dock projects, immersed tunnel projects, municipal administration soft earth foundation strengthening projects, high earthquake region basic project design and other similar projects.

The invention discloses a type of construction slurry for rotary pile drilling. The slurry is a type of compound slurry comprising water, bentonite, hydroxypropyl methyl cellulose solution, clay and soda ash. The construction slurry provided by the present invention can be widely applied in fields of well drilling, rotary pile drilling, and underground diaphragm wall. During a preparing process, the slurry can be mixed quickly and well. The slurry also has advantages of high efficiency, low pollution, low energy consumption and low cost.

The invention discloses floating-bead-free low-density oil well cement paste and belongs to the technical field of oil and gas well cementation. The cement paste is prepared from 10-30% of cementing material A, 15-50% of cementing material B, 2-48% of filling material, 1-3% of fluid loss agent, 1-4% of early strength agent and 0.5-1.5% of dispersing agent. The cementing material A is one of G-grade oil well cement, D-grade oil well cement and ordinary Portland cement. The cementing material B is superfine ordinary Portland cement. The cement paste has the advantages of being low in cost, low in density, and high in early strength, density stability and quality stability.

The present invention uses calcium base leituoshi stone ore as raw material, and adopts semi-dry artificial modification process including the steps: breaking clay mineral, adding 1%-5% sodium salt, uniformly mixing them, water-spraying, shearing, pressing, piling and ageing for 7-10 days, drying so as to obtain modified leituoshi stone. Said invention is simple in production method, convenient for operation, less in dosage of modifying agent and low in energy consumption and cost. The phi-600 reading value of drilling fluid prepared with modified leituoshi stone is greater than or equal to 60, mud-making rate is greater than or equal to 18 cu.m/t, filter loss is less than or equal to 13.5 ml and dynamic shear force is less than or equal to 1.2XPVPa. It is superior to sodium base bentonite in all the properties, and is applicable for drilling in the fields of petroleum industry, natural gas engineering, geologic drilling engineering and building engineering, etc.

The invention discloses a low-density cement slurry system for deepwater surface layer well cementation and application thereof. The low-density cement slurry system comprises the following components in parts by weight: 100 parts of cement, 5-40 parts of liquid suspending agent, 5-40 parts of liquid reinforcer, 4-10 parts of liquid water-loss control agent, 2-10 parts of early strength agent, 0.05-1.5 parts of defoaming agent and 50-250 parts of fresh water or sea water. The additives of the cement slurry system have definite performance and are all liquids; and the system is simple in composition, high in slurry making rate and excellent in low-temperature early-strength performance.

The invention relates to a grape branch pulp, which is prepared by using grape branches as materials and adopting soda-process pulping. The grape branch pulp adopts the grape branches which are not ever applied to the paper-making industry as the materials to prepare pulp, so that not only the effective utilization of the resources is achieved and the utilization value of the resources is greatly improved, but also the material source of paper-making and pulping is broadened; serious defects of wheat straw pulping materials are compensated, and a new pulp is added to the paper-making and pulping. In the invention , the soda process is used to prepare the grape branch pulp, so that the material utilization rate is high, the pulping rate is high, the yield is high, the coarse pulp yield can reach 40-45%, and the effective cooking time is only 2.7 hours, thus the production efficiency is high, the cooking quality is table, the production process is reliable, the cost is low, in particular the requirements to the material are low; besides, the pulp can be used to a bottom layer or a core layer of corrugated paper, and has certain popularization value.

The invention discloses a preparation method of modified attapulgite clay for drilling fluid. According to the invention, attapulgite clay is used as a raw material and a magnesium-containing substance is used as a modifier. By the adoption of a semi-dry production technology, the preparation method contains the following steps of: crushing clay mineral, adding the modifier for mixing, extruding, pulping, sieving, dehydrating, drying, crushing and packaging. The product provided by the invention can meet requirements of various geological drilling, geothermal drilling and petroleum drilling, and is especially applicable to inland saliferous strata drilling, offshore drilling and ultra-deep drilling.

The invention relates to extended bentonite for drilling fluid and method for making same, wherein the bentonite comprises alta-mud, sodium hydroxide, sodium salt, cellulose, starch, polypropylene ammonia, positive electricity adhesive, composite glue, and the preparing process comprises coarse crushing, finely crushing, screening, watering and stirring, squeezing, drying, and milling.

The invention discloses an oil well cement composition and an application thereof. The oil well cement composition is prepared from the following components in parts by weight: 100 parts of G-grade oil well cement and 15-30 parts of cement kiln ash. Optionally, the oil well cement composition can further comprise 1-5 parts of a suspending agent, 5-15 parts of an early strength agent, 5-10 parts ofan ultrafine material and 1-5 parts of an expanding agent. The density of the cement paste prepared from the oil well cement composition is adjustable between 1.4 g/cm<3> and 1.6 g/cm<3>, the cementpaste formula is simple in composition, high in paste making rate, high in compressive strength and good in sedimentation stability, the field construction requirement can be met without adding floating beads and the like to reduce the material performance, the cost is low, and construction is convenient. The construction problems that in the prior art, well cementation hollow floating beads and microbead cement paste of a full-sealing section of a low-pressure leaky stratum and a low-pressure oil-gas layer are high in cost, limited in pressure bearing capacity, low in paste making rate, largein ash demand, limited in site ash storage space, incapable of achieving full sealing and the like are solved.

The invention relates to a pulping method for waste Renminbi. The method adopts a caustic soda-anthraquinone pulping method. The process comprises stewing and bleaching, wherein alkali charge is controlled between 18% to 20% in the stewing, liquor ratio is 1:3.5-4.5, the stewing liquor temperature is 80 DEG C to 85 DEG C, and before the temperature rises, idling for 30 min, then rising temperature, and rising the temperature according to the temperature rising time and vapor pressure. By the adoption of the caustic soda-anthraquinone pulping method, the waste Renminbi is carried out by pulping, and the waste Renminbi can be fully resolved through controlling the stewing parameters, so that the pulping method for the waste Renminbi can be effectively used in papermaking system. Evenness of pulp got and full stuff efficiency are high, stewing quality is stable, and meanwhile usage amount of chemical materials is small and various energy consumptions are low, process investment is small, and the cost is low. The pulping method for the waste Renminbi achieves the recycle of waste resource, and meanwhile provides a novel pulp to the paper technology. The pulp of the process can be used for manufacturing specialty paper, and the pulping method for the waste Renminbi has a certain promotional value.

The invention discloses a pulp refiner for papermaking, which comprises a frame, a large pulp recovery box, a filter box, a cutting box, a grinding machine and an air hammer. One side of the air compressor is installed with a large pulp recovery box. A filter box is installed on one side of the large pulp recovery box, a vibrating screen is installed on one side of the filter box, a cutting box is installed on one side of the vibration motor, and a grinder is installed on the top of the fine pulp outlet. , an upper grinding wheel is installed on one side of the grinding machine, a lower grinding wheel is installed on one side of the upper grinding wheel, a grinding motor is installed on one side of the lower grinding wheel, and a discharge port is installed on one side of the grinding motor, An air hammer is installed on one side of the discharge port, and the invention can filter the cut pulp to make the filtered pulp uniform in size, and large pieces of pulp can be recycled and reused, saving energy, and at the same time, the pulp output rate is high. Will not stick to the inner wall of the outlet, easy to use.

The invention discloses a preparation method of bentonite for drilling mud. The method includes the steps of mining, sodium ion exchange capacity analysis, sodium ion regulation, accumulation sodium modification, drying and crushing, etc. The invention has the advantages that: the preparation method is simple, the use effect is good, the bentonite obtained by the method can be used to resist seawater and chemical polluted water, and can completely block seawater and chemical polluted water.

The invention provides pulping equipment for papermaking. The pulping equipment comprises a paper shredding device, a primary pulp mixing device, a pulping device and a pulp return pool, wherein the paper shredding device comprises a first device shell; a paper inlet is arranged on the upper end surface of the first device shell; a rotating shaft is arranged in the first device shell; a pluralityof paper shredding knives are fixedly arranged on the rotating shaft; a shredded paper outlet is arranged at the bottom part of the first device shell; the primary pulp mixing device comprises a second device shell; a water inlet is arranged on the second device shell; a stirring shaft is arranged in the second device shell and comprises a stirring section and an extrusion section; stirring bladesare fixedly arranged at the stirring section; and spiral blades are arranged at the extrusion section. According to the invention, by utilization of the paper shredding device, waste paper is cut into shredded paper; the shredded paper and water are mixed through the primary pulp mixing device and stirred through the stirring blades to form a mixed pulp; the mixed pulp is conveyed to a barrel-shaped shell under the rotating thrust action of the stirring blades inclining towards the extrusion section; the shredded paper is further continuously torn in the barrel-shaped shell and then discharged to the pulp forming device; and the pulp is further filtered through a filter screen in the pulping device to obtain a finished pulp.

The invention discloses a preparation method of mechanical rotary drilling pile wall-retaining slurry. The method is characterized by comprising the following steps: a, using a main material of a pulping agent having excitation expansion performance and main component SiO2 to prepare powder, performing uniform stirring, and allowing the stirred material to stand for 1-2 days for homogenization toform a uniform pulping material; b, adding an excitant and a swelling agent into the pulping material obtained in the step a, performing uniform mixing, adding water, and performing mixing under stirring to complete excitation and expansion of the main material of the pulping agent; and c, adding a dispersant, a tackifying agent, a thickening agent and a water retaining agent as auxiliary materials, and performing uniform mixing under stirring to prepare the wall retaining slurry. According to the preparation method provided by the invention, the wall retaining slurry prepared by the method has the advantages of better quality, lower preparation costs and better self-consolidation performance.

The invention discloses a concave-convex weave slurry agent. The invention is characterized in that the concave-convex weave slurry agent is formed by high-viscosity concave-convex rod clay, active concave-convex rod clay, polyacrylamide, sodium carboxymethylstarch, carbowax and alkyl sodium sulfonate; mixing the materials and processing into powder material, packing into final product. The inventive agent can be used in variable weave slurries, to accelerate the penetration and adhesive of slurry, to improve the adhesion and make the slurry uniform, the film flexible and smooth, with wide application, low cost and high biological degradation, without pollution. The inventive agent can absorb the harmful material and gas of weave slurry.

The invention relates to a preparation method of inorganic bentonite for drilling fluid. The preparation method specifically comprises the following steps: (1) taking low-grade calcium-based bentonite for crushing, adding a composite sodium agent into the bentonite, uniformly mixing to obtain a mixture, dissolving the mixture into water, regulating the pH value to be greater than or equal to 12 by caustic soda, and uniformly stirring, thereby obtaining mud for later use; (2) adding an inorganic composite suspending agent into mud prepared in the step (1), uniformly stirring, then adding polymerized sulfate to enable the pH value of the mud to be 7-10, filtering after uniformly stirring, taking precipitates to remove water to obtain the inorganic bentonite for the drilling fluid. According to the preparation method disclosed by the invention, the low-grade calcium-based bentonite is adopted to prepare OCMA-grade inorganic bentonite for the drilling fluid, so that a low-grade bentonite purifying step is omitted, a processing process of inorganic pulping bentonite is optimized, an organic high polymer material is not added in a preparation process, production cost of the bentonite is reduced, and the product pulping rate is high, so that the high-additional-value utilization of low-grade bentonite resources is realized.

The invention belongs to the technical field of insulating material manufacturing and provides an insulating material for pipelines and a preparation method. The insulating material for pipelines is prepared from, by weight, 50-75 parts of silicon dioxide particles with the average particle size pf 60-70 nm, 15-23 parts of hollow ceramic fiber, 2-9 parts of attapulgite clay particles and 11-15 parts of hollow glass fiber. The prepared insulating material has good insulating properties and high strength.

The invention provides a curable spacer fluid. The curable spacer fluid is prepared from the following raw materials in parts by weight: 4-40 parts of diatomite, 40-80 parts of a cementing material, 10-15 parts of an exciting agent and 1-5 parts of a fluid loss agent. According to the technical scheme provided by the invention, the curable spacer fluid of 1.20 g/cm<3> to 1.50 g/cm<3> can be obtained only by increasing the slurry making rate on the premise that expensive hollow glass beads are not used as lightening agents, and the 30-d strength of a curable spacer fluid curing body is 3.0 MPa to 25.0 MPa.

The invention relates to a wet strength paper treatment technology. Hot water and wet strength paper are added to a pulp kneader to pulp the wet strength paper, and heavy metal impurities contained in the wet strength paper are removed after the wet strength paper is pulped; and pulp is condensed by spiral condensing equipment, is heated by spiral heating equipment and enters a thermal dispersionmachine to be further torn, diluted and beaten to prepare fiber pulp. The wet strength paper treatment technology effectively improves the pulping yield of the wet strength paper, lessens the waste, reduces the production cost and improves the economic benefits.

The invention provides a method using the quality-based utilization of low-rank coal to prepare coal-water slurry. The method includes: drying, performing gasification reduction, crushing and grinding. The method has the advantages that quality-improved coal, rice gas, clean water and coal tar are prepared by the quality-based utilization of the low-rank coal, the prepared quality-improved coal isqualitatively changed as compared with the low-rank coal in terms of coal properties, the low-range coal which is many and large in pore structure, excellent in hydrophilicity, high in water content,different in quality and low in consistency is prepared into the quality-improved coal which is few and small in pore structure, excellent in hydrophobicity, low in water content, identical in quality and high in consistency, and accordingly the coal-water slurry which is high in slurry forming rate (the slurry forming rate of the coal-water slurry can reach 70%) and prepared by different low-rank coal is small in quality difference and high in consistency; the method can provide clean water and use process water provided by other coal processing processes and has excellent system cooperationability.