Patents

Literature

Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.

61results about How to "Promote cementation" patented technology

Filter

Efficacy Topic

Property

Owner

Technical Advancement

Application Domain

Technology Topic

Technology Field Word

Patent Country/Region

Patent Type

Patent Status

Application Year

Inventor

Method for preparing coarse aggregates from coral reefs and concrete

InactiveCN105731897ALow costSolve technical problemsWater desalinationEconomic benefits

The invention discloses a method for preparing coarse aggregates from coral reefs and concrete.The method for preparing the coarse aggregates comprises the following steps that 1, the cleaned coral reefs are soaked for 2-10 h with hydrochloric acid of 0.1-1 mol/L, and then the soaked coral reefs are cleaned with water to remove hydrochloric acid remaining on the surfaces of the coral reefs; 2, the coral reefs soaked with hydrochloric acid are sieved, and residues on a sieve are obtained; 3, the residues on the sieve are soaked for 10 h or above with a water glass solution with the mass fraction ranging from 5% to 30%, the soaked residues are taken out and dried, and the coarse aggregates are obtained.The method solves the technical problem of taking the coral reefs as the coarse aggregates of concrete; the coarse aggregates are successfully applied to the concrete or even sea water and sea sand concrete, the coral reefs, sea water and sea sand are directly used for preparing the concrete, the processes such as sea water desalination and sea sand desalination are omitted, the problem that long distance transportation of river sand, fresh water and gravel is high in cost is solved, and enormous social and economic benefits are achieved.

View all

Low softening point emulsified asphalt for drilling fluid, and preparation method thereof

InactiveCN103265816AAchieve recyclingReduce consumptionDrilling compositionBuilding insulationsSlurrySolvent

The invention discloses a low softening point emulsified asphalt for a drilling fluid, and a preparation method thereof. The emulsified asphalt comprises, by weight, 25-50 parts of an oil slurry, 10-35 parts of a solvent oil, 1-4 parts of a non-ionic surfactant, 1-4 parts of a cation surfactant, 0-4 parts of a C2-C4 alcohol, and 30-40 parts of water. The preparation method comprises: adding a solvent oil and a non-ionic surfactant to an oil slurry, carrying out heating and uniform stirring to obtain an oil slurry mixing liquid, carrying out mixing heating stirring on water, a C2-C4 alcohol and a cation surfactant until the cation surfactant is dissolved, adding the oil slurry mixing liquid, and stirring at a temperature of 45-90 DEG C to obtain the low softening point emulsified asphalt. The emulsified asphalt has the following characteristics that: the emulsified asphalt is easily dispersed in water, and has characteristics of low softening point, good anti-sloughing effect and good lubricating performance; with the emulsified asphalt, the broken stratum can be well cemented at a low temperature, hole wall cracks can be plugged, and hole wall stability can be increased; and the emulsified asphalt can be widely used in geological drilling, petroleum and natural gas well drilling, geoheat drilling and the like, oil slurry recycling is achieved, and process cost is reduced.

Low softening point emulsified asphalt for drilling fluid, and preparation method thereof

View all

Owner:BEIJING INST OF EXPLORATION ENG

Improvement method of sandy clay loam saline-alkaline soil

InactiveCN107912098ASimple processEasy to implementOther chemical processesCereal cultivationBiogasOrganic acid

The invention aims to solve the problem that there is few study on effective and lasting improvement methods of sandy clay loam saline-alkaline land in the prior art and provides an improvement methodof sandy clay loam saline-alkaline soil. Improver iron tailings are added into the sandy clay loam saline-alkaline soil, and the iron tailings are utilized to change proportion of sand, powder and clay particles in sandy clay loam and reasonably adjust texture composition to modify the sandy clay loam saline-alkaline soil into loam, so that a lot of capillary pores can be retained, a lot of non-capillary pores and macrocracks can be formed, permeability is improved, water draining and salt washing are facilitated, capillary water can be blocked from going up, salt accumulation is reduced, andsoil salinity can be lowered effectively; by adding organic acid, composted sludge or composted biogas residue, compatibility between iron tailings sand and natural soil is improved, differential settlement and stratification in the process of saline-alkaline soil improvement are avoided or reduced to form soil structure uniform in texture, and lasting improvement of the saline-alkaline soil andstability of soil texture are realized.

Improvement method of sandy clay loam saline-alkaline soil

View all

Owner:ANSTEEL GRP MINING CO LTD

Spraying material for coal mine underground roadway and preparation method of spraying material

InactiveCN110540395AReduce dosageImprove adhesionSocial benefitsWater leakage

The invention discloses a spraying material for a coal mine underground roadway and a preparation method of the spraying material. The problems that existing spraying materials are poor in cohesiveness, high in rebound and easy to crack, lots of the materials drop on the ground, and functions of seepage prevention, water leakage prevention, gas leakage prevention and the like are not fulfilled aresolved. The spraying material and the preparation method thereof are provided. According to the spraying material for a coal mine, an inorganic composite material is adopted, various advantages of anorganic material and an inorganic material are combined, the optimal proportion of raw material components is analyzed by an orthogonal test method, the spraying speed and the spraying quality are greatly increased, the working environment is improved, meanwhile, the cost is reduced, and good economic benefits and social benefits are obtained.

Spraying material for coal mine underground roadway and preparation method of spraying material

View all

Owner:张园月

Mixed prepolymer of solidifying agent methyl diphenylene diisocyanate and 1,6-hexamethylene diisocyanate

InactiveCN101402716AHigh strengthHigh activityPolyurea/polyurethane coatingsAlcoholOrganic solvent

The invention relates to a curing agent compound prepolymer composed of diphenylmenthane diisocyanate and 1, 6-hexamethylene diisocyanate and a preparation method thereof. The method comprises the following steps: MDI and an organic solvent are added and heated to 65 DEG C, polybasic alcohol is added and reacts with the mixture for 2 hours to 4 hours to obtain an MDI modifier; HID, an organic solvent and polybasic alcohol are added, heated and react for 2 hours to 5 hours, then the temperature is reduced below 70 DEG C, a TMP and organic solvent mixture is added, reaction at 70 DEG C lasts for 1 hour to 4 hours and 1 hour to 4 hours when the temperature is between 60 DEG C and 100 DEG C so as to obtain an HDI-MDI compound prepolymer curing agent. The method mixes and pre-polymerizes MDI and HDI, integrates the excellent performance of the two, produces a series of polyurethane curing agents with wide application range, high strength, good yellow-changing resistance, high curing speed, low toxicity, good storage stability and high solid content and has simple production technique.

Mixed prepolymer of solidifying agent methyl diphenylene diisocyanate and 1,6-hexamethylene diisocyanate

View all

Owner:FOSHAN JINGXIN HUIMING TECH CO LTD

Reinforcing and strengthening processing method of chemical grout

ActiveCN101694094ALow viscosityReduce surface tensionSoil preservationGroutSurface tension

The invention discloses a reinforcing and strengthening processing method of chemical grout, a injected body is slightly divided into a plurality of injected rock surfaces through being layered and segmented, then holes are drilled on the injected rock surfaces, the grout injecting pressure and the grout injecting speed of the grout injection are controlled, and the grout injecting time is sufficient, the surface tension whose initial viscosity is 2.0 m Pa.s-15.0 mPa.s and is less than the surface tension of water is used, the surface tension is not less than 0.050 m N/m at 20 DEG C, and epoxide resin grout materials with 1-16 degrees contact angles and the like are used, thereby epoxide resin slurry uniformly filters into a hole and a minuteness crack of the injected body, the gluing of gelatinization matter is good, the properties of the injected body is integrally improved, the strength of the injected body and the like are greatly improved, the over-high engineering cost is avoided, and the manufacturing cost is saved through controlling the infiltration range.

View all

Owner:中国水利水电第七工程局成都水电建设工程有限公司

Emulsifying and flushing spacer fluid for improving cementing quality of oil-based drilling fluid and preparation method of emulsifying and flushing spacer fluid

ActiveCN105001841AImprove surface activityTemperature resistanceDrilling compositionGlycosideDiluent

The invention discloses an emulsifying and flushing spacer fluid for improving the cementing quality of an oil-based drilling fluid and a preparation method of the emulsifying and flushing spacer fluid. The spacer fluid is prepared from the following components in parts by weight: 200 parts of water, 5-10 parts of a surfactant, 70-75 parts of base oil, 4-15 parts of a suspension stabilizer, 0.2-3.0 parts of a fluid loss agent, 0.2-2.0 parts of a tackifier, 0.2-5.0 parts of a diluent, 80-400 parts of a weighting agent and 0.05 part of a defoamer, wherein the surfactant is prepared from cocoanut fatty acid diethanolamide CDEA and alkyl glycoside APG in a weight ratio of 1: 2. The emulsifying and flushing spacer fluid which has an emulsifying structure with permeating, dissolving, volume-increasing, carrying functions and the like has a preferable flushing capacity to the oil-based drilling fluid and mud cakes adhered to a casing wall. The surfacant molecules in the spacer fluid can be adsorbed on the surfaces of a casing and a well wall to improve the interfacial wettability, so that cement slurry and the casing and the well wall are better contacted and cemented, and therefore, the first and second interfacial cementation qualities for well cementation are improved.

Emulsifying and flushing spacer fluid for improving cementing quality of oil-based drilling fluid and preparation method of emulsifying and flushing spacer fluid

View all

Owner:SOUTHWEST PETROLEUM UNIV

Chemical slip casting strengthening material and preparation method thereof

InactiveCN101602880AEasy to operateLow costProps/chocksCompound (substance)Firming agent

The invention relates to a chemical slip casting strengthening material and a preparation method thereof. A chemical slip casting strengthening material with two components (component A and component B) is provided, thus effectively solving the problems existing in conventional chemical slip casting materials, such as slow polyurethane polymerization, poor flame retardation and environment pollution. When the chemical slip casting material is used, the component A, i.e. phenolic resin, and the component B, i.e. curing agent, are mixed according to a weight ratio of 1:1. The phenolic resin is obtained by firstly mixing phenol and formaldehyde according to a weight ratio of 1:1.3-1.5, then adding the catalyst NaOH, heating the mixture to a temperature of 90-100 DEG C, causing the reaction to last 4-6 hours, carrying out neutralization and dehydration, cooling the mixture to 25 DEG C and adding foaming agent and surfactant for full mixing. The curing agent consists of 0.6-1.0 part of p-toluenesulfonic acid by weight, 0.8-1.3 parts of phosphoric acid by weight, 0.5-1.0 part of hydrochloric acid by weight and 0.1 part of ethylene glycol by weight. The chemical slip casting material needs a short time for solidification, has an inflaming retarding oxygen index higher than or equal to 54, and is suitable for the slip casting strengthening engineering of a mine, as well as the seepage-proofing, leaking stoppage and strengthening work of an ordinary underground engineering or a water conservancy engineering.

Owner:廊坊鑫美源化工建材有限公司

Heat insulating component

InactiveCN103031895AImprove performanceImprove mechanical propertiesClimate change adaptationHeat proofingReinforced concreteEngineering

The invention relates to a heat insulating component, which is characterized in that the heat insulating component comprises an upper hard plate (3) and a lower hard plate (1) which are oppositely arranged, and a heat insulating layer (2); and the heat insulating layer (2) is arranged between the upper hard plate (3) and the lower hard plate (1), the heat insulating layer (2) is an integral layer block, and the thickness of the upper hard plate (3) and the thickness of the lower hard plate (1) are the same. The heat insulating component is suitable for cast-in-situ reinforced concrete or prestressed reinforced concrete hollow floors, roofs, wall bodies, foundation bottom plates and hollow bridges.

View all

Owner:湖南华廷筑邦住宅工业有限公司

High-strength muck unfired product and preparation method thereof

ActiveCN110510966AHigh long-term strengthGood freeze-thaw resistanceIonSlag

The invention discloses a high-strength muck unfired product and a preparation method thereof. The high-strength muck unfired product is prepared from the components in parts by weight: 20-50 parts ofblast furnace slag, 50-90 parts of muck, and 8-30 parts of an alkali-activator. According to the high-strength muck unfired product, the surface of the muck is coated with the blast furnace slag, calcium ions are released in an alkaline solution, the calcium ions substitute low-valence positive ions adsorbed on the surface of clay particles in the muck, the thicknesses of double electric layers on the surfaces of the clay particles are decreased, the distance between the particles become small, compaction is conducted under the action of the external pressure, and a more compact structure isobtained; active components in the blast furnace slag reacts with the alkali-activator to generate gelling substances such as C-A-S-H, the gelling substances are connected with muck particles, the early strength is formed, and sun cracking caused by water losing of the muck can be resisted; and under the high-alkaline condition, silicon oxide and aluminum oxide in the muck are released slowly to react with the alkali-activator in a pore solution, a geopolymer is generated, on the one hand, pores are filled, on the other hand, the muck particles are cemented better, and thus the long-term strength of the product is improved.

High-strength muck unfired product and preparation method thereof

View all

Owner:CHINA CONSTR FIFTH ENG DIV CORP LTD

Working face collapse column grouting waterproof treatment method

InactiveCN111075482APrevent beingImprove water barrier effectUnderground chambersSealing/packingDrill holeCoal

The invention relates to the technical field of coal mine disaster treatment, in particular to a working face collapse column grouting waterproof treatment method. The method comprises the following steps that a working face cut opening is pushed, and pushing is stopped until the safe distance between the working face cut opening and the collapse column is kept; two grouting auxiliary roadways anda plurality of grouting drill nests are tunneled at the positions, corresponding to the collapse column, of a transportation crossheading, and a plurality of corresponding grouting drill nests are tunneled at the positions, corresponding to the collapse column, of an air return crossheading; and inclination grouting drill holes are constructed in the grouting auxiliary roadways and the grouting drill nests in the transportation crossheading, inclination grouting drill holes are constructed in the grouting drill nests in the air return crossheading, and the final hole layers of all the grouting drill holes are controlled to be located in a bottom plate aquifer between the two bottom plate water-resisting layers of the coal seam. The method is not only suitable for preventing the situationthat the non-water-guide collapse column is activated and guides water due to mining influence, but also can reinforce the water-guide collapse column in a multi-layer grouting mode, the water insulation capacity can be improved, and it is ensured that no water damage accident occurs when the coal face is pushed over.

Working face collapse column grouting waterproof treatment method

View all

Owner:NORTH CHINA INST OF SCI & TECH +4

Brine cement slurry adapted for salt hole air reserved storeroom

InactiveCN1919963AReliable technologyStrong on-site operabilityMining devicesDrilling compositionSaline waterDefoaming Agents

The invention relates the salt-water cement mud. The mud comprises 100 parts G grade cement, 44-50 parts 15-18% salt-water, 1.2-1.8 parts salt resistance dispersing agent, 3-4 parts salt resistance filtration-reducing agent, and 0.1-0.5 parts defoaming agent. The invention also provides the technology, which has low cost and simple operation and meets other mating technology. The cement has advantages of low temperature fast coagulation, good salt resistance, high-early-strength, preference consistency, low filteration loss and good stability.

Owner:PETROCHINA CO LTD

Elastic-tough well cementation cement paste suitable for coalbed methane and preparation method thereof

PendingCN112500042ALow elastic modulusMeet site engineering requirementsDrilling compositionGeotechnical engineeringHydration reaction

The invention provides elastic-tough well cementation cement paste suitable for coalbed methane. The elastic-tough well cementation cement paste comprises the following components in parts by weight:100 parts of oil well cement; 12 to 15 parts by weight of water-soluble resin; 0.8 to 4 parts by weight of fibers; 7-9 parts by weight of nanoparticles; 35-48 parts by weight of water. Compared with the prior art, the nanoparticles are used for regulating and controlling the hydration reaction of the cement paste; meanwhile, micropores in set cement are filled, the compactness of the set cement isimproved, and the strength is optimized; meanwhile, the added fibers not only can play a bridging role in cracks, but also can form a compact net-shaped structure in set cement to absorb external force impact and improve the tensile strength of the cement; in addition, the water-soluble resin is added as a cementing material, so that the cementation between the plugging materials and between theplugging materials and the surfaces of the cracks can be improved, the stability of the plugging structure is further improved, and the elasticity and toughness of the cement paste can be improved asthe resin material has better elasticity and toughness.

Elastic-tough well cementation cement paste suitable for coalbed methane and preparation method thereof

View all

Owner:CHINA UNITED COALBED METHANE +1

Working fluid system applicable to water-base drilling fluid filter cake removal before well cementing

ActiveCN106634914AImprove removal efficiencyShorten the timeDrilling compositionWater basedWorking fluid

The invention discloses a working fluid system applicable to water-base drilling fluid filter cake removal before well cementing. The working fluid system is composed of the following components in percentage by mass: 0.5-1.5% of solid-phase denudation main agent, 0.1-1% of solid-phase denudation aid, 0.15-0.5% of viscosity breaker, 0.5-1.5% of surfactant, 1-3% of clay stabilizer and the balance of water. The pH value of the solution is regulated to 12-14 by NaOH or KOH. The solid-phase denudation main agent is composed of any one or mixture of ethylenediamine tetraacetic acid, disodium edetate, diethyltriamine pentaacetic acid and pentasodium amino trimethylene phosphonate; and the solid-phase denudation aid is composed of any one or mixture of sodium gluconate, oxalic acid and potassium sodium tartrate. By combining the characteristics of well cementing operation, the working fluid system can shorten the construction time, has higher reaction speed, achieves the goals of removing the filter cake and enhancing the cementing strength of the well-cementing interface, and thus, has broad market prospects.

Owner:SOUTHWEST PETROLEUM UNIV

Device and method for measuring inner stress of concrete

InactiveCN102322982BFully contactedIncrease roughnessForce measurementSurface stressMeasurement device

The invention provides a device and method for measuring the inner stress of concrete. The device comprises two hemispherical shells, wherein a left hemispherical shell, a right hemispherical shell and a force measuring steel ring are assembled together to form a spherical cavity, the force measuring steel ring is provided with rubber-based strain foils, the spherical cavity is provided with signal acquisition boards, the rubber-based strain foils are connected with the signal acquisition boards through lead wires, and the signal acquisition boards are connected with signal transmission lines. The device is buried in a concrete structure; a plurality of rubber-based strain foils are adhered to an inner surface of the force measuring steel ring at equal intervals; a surface stress cosine function curve of the force measuring steel ring is fit according to a stress value measured on the surface of the force measuring steel ring; and the direction and magnitude of a primary stress of the concrete are measured according to a phase angle and an amplitude of the function curve. The device and method for measuring the inner stress of the concrete provided by the invention can be used for overcoming the defects of difficulty in the bury and positioning as well as poor data reliability of the traditional strain gauge for monitoring the stress of an inner structure of the concrete, and is particularly suitable for measuring the stress state of the inner part of a large-volume concrete structure.

Device and method for measuring inner stress of concrete

View all

Owner:CHINA THREE GORGES UNIV

Fabrication method of heat insulating component

InactiveCN103031897AImprove performanceImprove mechanical propertiesClimate change adaptationFloorsReinforced concreteHardboard

The invention relates to a fabrication method of a heat insulating component. The fabrication method of the heat insulating component is characterized in that the fabrication method comprises the following steps that a heat insulating layer (2) is firstly fabricated by using a heat insulating material; after the heat insulating layer is cured and formed, an upper hard plate (3) is poured on one surface of the heat insulating layer (2); after the upper hard plate (3) is hardened and formed, a lower hard plate (1) is poured on the other surface of the heat insulating layer (2); and after the lower hard plate (1) is hardened and solidified, the heat insulating component is cured to a specified age. The heat insulating component which is fabricated by using the fabrication method is suitable for cast-in-situ reinforced concrete or prestressed reinforced concrete hollow floors, roofs, wall bodies, foundation bottom plates and hollow bridges.

Fabrication method of heat insulating component

View all

Owner:湖南华廷筑邦住宅工业有限公司

Injectable hydrogel as well as preparation method and application thereof

ActiveCN113416326AImprove adhesionControllable 3D mesh structureSurgical adhesivesAerosol deliveryGlutaminasePolyphenol

The invention relates to injectable hydrogel as well as a preparation method and application thereof. The injectable hydrogel is obtained by taking gelatin and tannic acid as raw materials and carrying out chemical crosslinking under the catalysis of transglutaminase. Gelatin molecular chains in the injectable hydrogel form a network structure under the action of amido bonds, polyphenol hydroxyl groups of the tannic acid and amino groups on the gelatin chains have hydrogen-bond interaction, the polyphenol hydroxyl groups of the tannic acid can be spontaneously complexed under an alkaline condition, and finally the injectable hydrogel is endowed with excellent adhesion performance; the material and tissues are adhered, the performance of the material is promoted, the injectability of the material is improved, the gelling time is shortened, the clinical operation is easy, and the mechanical property is improved. The hydrogel material can realize adhesion and efficient retention of defective tissues, is suitable for filling various irregular-shaped defects, can efficiently promote the performance of the material to play, and realizes repair of the defective tissues.

Injectable hydrogel as well as preparation method and application thereof

View all

Owner:SHENZHEN PEOPLES HOSPITAL

Lipophilic cement paste capable of improving packing performance of oil-containing well cementation interfaces

ActiveCN113999658AStrong wetting reversal abilityImprove wetnessSolid waste managementDrilling compositionActive agentPhysical chemistry

The invention discloses lipophilic cement paste capable of improving the packing performance of oil-containing well cementation interfaces. The cement paste comprises the following components in parts by weight: 100 parts of cement, 35-65 parts of water, 3-8 parts of a fluid loss agent, 2-5 parts of a retarder, 0.5-1.7 parts of an anionic-nonionic surfactant, 0.5-1.7 parts of an anionic or nonionic surfactant with an HLB value of 8-15, 0.02 part of a defoaming agent, 20-25 parts of a strength stabilizer, 10-80 parts of a density regulator and 1 part of a dispersing agent. The cement paste disclosed by the invention has oleophylic capacity, realizes good cementation of a cement sheath and an oil-containing well cementation interface I and an oil-containing well cementation interface II, can overcome the defect that wetting reversal of the interfaces is achieved only by using prepad fluid, greatly improves the packing effect of the cement sheath under the condition of oil-based drilling fluid, and reduces dependence on the performance of a prepad fluid.

Lipophilic cement paste capable of improving packing performance of oil-containing well cementation interfaces

View all

Owner:SOUTHWEST PETROLEUM UNIV

Heat insulating component

InactiveCN103031898AImprove performanceImprove mechanical propertiesHeat proofingReinforced concreteEngineering

The invention relates to a heat insulating component, which is characterized in that the heat insulating component comprises an upper hard plate (3) and a lower hard plate (1) which are oppositely arranged, and a heat insulating layer (2); and the heat insulating layer (2) is arranged between the upper hard plate (3) and the lower hard plate (1), the heat insulating layer (2) is an integral layer block, and the plate edge of at least one side of the upper hard plate (3) is a folded side or a curved side. The heat insulating component is suitable for cast-in-situ reinforced concrete or prestressed reinforced concrete hollow floors, roofs, wall bodies, foundation bottom plates and hollow bridges.

View all

Owner:湖南华廷筑邦住宅工业有限公司

Low softening point emulsified bitumen for drilling fluid and preparation method thereof

InactiveCN103265816BAchieve recyclingReduce consumptionDrilling compositionBuilding insulationsActive agentWell drilling

The invention discloses a low softening point emulsified asphalt for drilling fluid and a preparation method thereof. The emulsified asphalt contains by weight: 25-50 parts of oil slurry, 10-35 parts of solvent oil, and 1-4 parts of nonionic surfactant , 1~4 parts of cationic surfactant, 0~4 parts of C2~C4 alcohol and 30~40 parts of water. Its preparation method is to add solvent oil and nonionic surfactant into the oil slurry, heat and stir to obtain the oil slurry mixture; then mix water, C2~C4 alcohol and cationic surfactant, heat and stir until the cationic surfactant is dissolved, and then Add oil slurry mixture and stir at 45-90°C to obtain low softening point emulsified asphalt. The emulsified asphalt of the present invention is easy to disperse in water, has a low softening point, has good anti-slump effect and lubricating performance, can better cement broken strata at low temperature, seal hole wall cracks, and improve hole wall stability, and is widely applicable to Geological drilling, oil and gas well drilling and geothermal drilling, etc., and realize the recycling of oil slurry and reduce process costs.

Low softening point emulsified bitumen for drilling fluid and preparation method thereof

View all

Owner:BEIJING INST OF EXPLORATION ENG

High-strength cold-resistant aramid fiber synchronous belt and preparation method thereof

InactiveCN112063173AGood synergyEasy to useCellulosePolymer science

The invention relates to the field of aramid fibers, particularly to a high-strength cold-resistant aramid fiber synchronous belt and a preparation method thereof. The high-strength cold-resistant aramid fiber synchronous belt is prepared from aramid short fibers, nylon short fibers, glass fiber core wires, ferroferric oxide, phenolic resin, N-2,2-dibenzamido diphenyl disulfide, calcium borate, silicon dioxide, aluminum oxide, bentonite, sodium carboxymethyl cellulose and silicone rubber. According to the method, the performance of all the raw materials is fully considered, fiber sorting is guided under an external magnetic field through the magnetic materials, the synergistic effect among the raw material components is effectively enhanced, good use of the synchronous belt at the low temperature is guaranteed, and the use time of the synchronous belt in the low-temperature environment is prolonged.

Owner:NINGBO FULONG SYNCHRONOUS BELT

Ultralow-density cement slurry suspension stabilizer applicable to low-temperature-to-high-temperature conditions

ActiveCN107903883AHigh chemical purityGood dispersionDrilling compositionVolumetric Mass DensityCement slurry

The invention discloses an ultralow-density cement slurry suspension stabilizer applicable to low-temperature-to-high-temperature conditions. The suspension stabilizer is prepared from the following ingredients in percentage by mass: 45% to 60% of subnanometer silica, 40% to 55% of micron amorphous silica and 5% to 8% of micron asphalt powder. The subnanometer silica contains the silicon dioxide content of 95% or more by mass, is white or greyish-white solid powder and has the median particle size lower than 200nm-450nm; the micron amorphous silica contains the amorphous silicon dioxide content of 85% or more by mass, is white or greyish-white solid powder and has the median particle size lower than 10mm-30mm; and the micron asphalt powder contains the asphalt content of 85% or more by mass, has a softening point of 30 DEG C to 130 DEG C and has the median particle size lower than 20mm-50mm. The suspension stabilizer can cause low thickening at normal temperature to facilitate the blending of ultralow-density cement slurry and can still have good suspending characteristics at high temperature to prevent the ultralow-density cement slurry from being settled and layered, the design performance of the cement slurry is kept, and the demands of oilfields on low-temperature-to-high-temperature ultralow-pressure stratum well cementation are met, so that the suspension stabilizer has abroad application prospect.

Owner:BC P INC CHINA NAT PETROLEUM CORP +2

Freeze resistant sand fixing agent

InactiveCN110129066AHydrophilicGood swelling propertiesOther chemical processesOrganic fertilisersTranspirationWater contact

The invention discloses a freeze resistant sand fixing agent, and belongs to the technical field of sand fixing. A prepared water absorbing additive can improve the swelling performance and swelling dynamics of a composite material; absorbed water is stored in the channels, introduced carboxyl groups have a hydrophilic property, water contacting performance is enhanced, the water absorbing and water retaining performance of the sand fixing agent are improved; a microbial additive absorbs Ca<2+> from a surrounding sandy environment, then Ca<2+> combines with carbonate ions to generate mineral precipitates, as the stacking of the minerals, the density of the sandy layer is increased, the permeability is reduced, the absorbed water is sealed and stored, the cementing of sand is promoted, thesand is continuously fixed and protected; a freeze resistant additive can effectively reduce the size of pores, the transpiration rate is reduced, the water utilization rate is increased, water loss is reduced, water can be absorbed and utilized by plants, and the sand quality can be adjusted. The problems that in the prior art, the freeze resistant performance of a conventional sand fixing agentis bad and the sand fixing efficiency is bad are solved.

Owner:陈玉潇

Hydraulic oscillation centering device

ActiveCN103806863AReasonable structureEasy to useSealing/packingPhysicsWell cementing

The invention relates to the technical field of centering devices for well drilling and completion work, and discloses a hydraulic oscillation centering device. The hydraulic oscillation centering device comprises an outer cylinder, an eccentric rotating inner cylinder and an annular gland. An annular end cover is fixed to the inner side of the upper end of the outer cylinder. The eccentric rotating inner cylinder which can rotate in the outer cylinder in an eccentric mode under the impact of fluid is arranged in the outer cylinder in a sleeved mode. The annular gland is fixedly installed at the position, corresponding to the position below the eccentric rotating inner cylinder, inside the lower portion of the outer cylinder. The annular gland and the annular end cover are respectively provided with at least one circulating passageway which is communicated with the inner portion of the outer cylinder in the circumferential direction. The hydraulic oscillation centering device is reasonable and compact in structure; the hydraulic oscillation centering device drives a sleeve to shake, and therefore generated vibration waves can impact on sleeve columns and wash away mud cakes on the well wall; viscosity of displacing liquid is reduced, and therefore the displacing liquid can easily flow, displacing efficiency is improved, and meanwhile cementing of cement sheathes and the well wall and cementing of the sleeve columns and the well wall are facilitated, the density degree of set cement is increased, and therefore well fixing quality is effectively improved; the hydraulic oscillation centering device can be applied to any well condition and any stratum and has a good effect on low-pressure stratums which are prone to leakage.