56results about How to "Overcome cohesion" patented technology

The invention relates to an oil displacement composition used for low permeability oil reservoirs, and a preparation method thereof, and mainly solves the problems of easy stratum obstruction and difficult injection in the low permeability oil reservoir oil displacement process of present composite flooding polymers. The oil displacement composition contains a long carbon chain betaine surfactant and an inorganic salt, wherein the long carbon chain betaine surfactant is anyone selected from long chain carboxylic acid betaine and sulfonic acid betaine, the carbon chain is a C14-C40 alkyl or alkenyl group, the inorganic salt is anyone of or a composition of CaCl2, MgCl2, NaCl and NaHCO3, and a mass ratio of the long carbon chain betaine surfactant to the inorganic salt is 1:(1-100). The oil displacement composition has the advantages of formation of oil-water ultralow interface tension, decompression and augmented injection, and simple system, well solves the problems, and can be used in the intensified oil production process of the low permeability oil reservoirs.

The invention relates to a surfactant combination for enhancing oil recovery and a preparation method thereof, and mainly solves the problem of low oil displacement efficiency in the tertiary recovery process in the existing surfactants and the problem of damage to stratums and oil wells, corrosion of equipment and pipes and difficulty in demulsification because inorganic base is contained in oil displacement systems. The surfactant combination comprises a cationic surfactant and an anionic-nonionic surfactant, wherein the cationic surfactant is selected from any one of quaternary ammonium salt and quaternary ammonium alkali; the anionic-nonionic surfactant is a surfactant containing ethoxy nonionic groups and carboxyl or sulfo anionic groups; the mol ratio of the cationic surfactant to the anionic-nonionic surfactant is (1:0.01) to (1:100). The surfactant combination and the preparation method thereof preferably solve the problems, and can be applied to the tertiary recovery process of oil fields.

The invention relates to an oil-displacement surfactant composition, a preparation method and application, and mainly solves the problems that conventional surfactants are bad in oil displacement efficiency in the process of tertiary oil recovery, and an oil displacement system damages stratums and oil wells, corrodes equipment and pipelines and cause demulsification difficulty because of a contained inorganic base. The employed oil-displacement surfactant composition comprises a cationic surfactant and an anionic-nonionic surfactant with the molar ratio of 1:0.01-1:100, wherein the anionic surfactant is at least one selected from quaternary ammonium salts or quaternary amine bases, and the anionic-nonionic surfactant has the molecular general formula shown in the specification, and the in general formula, M is any one of alkali metals, alkali earth metals and ammonium radical. The technical scheme relatively well solves the above problems, and is applicable to an enhanced oil recovery process of oil fields.

The invention relates to a surfactant composition for chemical displacement of reservoir oil and a preparation method thereof, mainly for solving the problems that the conventional surfactant is poor in oil displacement efficiency in the tertiary oil recovery process and an oil displacement system containing inorganic base damages stratums and oil wells, corrodes equipment and pipelines and results in difficult demulsification. The surfactant composition provided by the invention comprises a cationic surfactant and an anionic-nonionic surfactant, wherein the cationic surfactant is at least one of quaternary ammonium salt and quaternary ammonium alkali; the anionic-nonionic surfactant is a surfactant containing an ethyoxyl nonionic group and a carboxyl or sulfonic acid group anionic group; and the molar ratio of the cationic surfactant to the anionic-nonionic surfactant is (1:0.01)-(1:100); and by the adoption of the surfactant composition and the preparation method of the surfactant composition, the above problems can be well solved. The surfactant composition can be applied to tertiary oil recovery process of an oil field.

A known method from fiber engineering is improved in which fibers consisting of a large number of filaments are broadened out into bands (3a, 3b), placed side by side and pulled by a grasper (6) over a transport device in the form of segments (5) cut to size, and are secured thereon by means of an extending-clamping device (16). The direction of movement of the grasper (6) is denoted by reference number (7) and the required separating device by reference number (9). The novelty consists in that the bands (3a, 3b) of the segment (5) are combined and set to the side of the segment in an essentially non-bonded manner. A method is provided herein such that the measures for obtaining a transverse cohesion extending laterally across several bands (3a, 3b) are omitted. However, a transverse cohesion imprinted from the outside can extend across the filaments of a single band (3a, 3b). In this manner, the bands (3a, 3b) are set aside in a particularly uniform and smooth manner. When laid by means of the grasper (6), differences in length and tension between the single bands (3a, 3b) are compensated, which would be expressed, for example, as bulges (10). An additional, short tug on the already almost completely transported segment (5) is possible. The retention force for tightening can be applied by a braked supply coil of the starting material. The illustration 'a' denotes the state of the segment before the compensation movement, illustration 'b' denotes the state thereafter.

The invention belongs to a quick analysis method of wet-type clay sand quality parameters for casting and its equipment. In particular it relates to a method for detecting effective clay content, water content, air permeability and comprehensive strength of wet-type clay sand and its equipment. Said method is characterized by that applying AC power supply and DC power supply to standard sand sample at twice successively to make excitation, and utilizing measured sand sample AC conductive capability, initial AC conductive capability, AC condutive capability change rate and other information parameters obtained in the sample-making process to solve the effective clay content and water content, and can obtain tested result within few seconds. Said equipment includes sand sample barrel, strength detection cylinder, piston rod and weighing sensor, etc.

The invention relates to a surfactant composition for tertiary oil recovery and a preparation method thereof, mainly for solving the problems that the existing surfactant has poor oil displacement efficiency in tertiary oil recovery, inorganic base contained in a displacement of reservoir oil system damages the stratum and oil wells, corrodes equipment and pipelines, and results in difficult emulsion breaking. The surfactant composition comprises a cationic surfactant and an anion-nonionic surfactant, wherein the cationic surfactant is any one of quaternary ammonium salt and quaternary amine alkali, the anion-nonionic surfactant contains ethyoxyl nonionic group and carboxyl or sulfonic acid group anionic group, and the molar ratio of the cationic surfactant to the anion-nonionic surfactant is 1:0.01-1:100. Due to adoption of the surfactant composition and the preparation method, the above problems can be well solved. The technical scheme can be used in the oil field tertiary oil production process.

The invention relates to a compound surfactant composition and an application. The composition mainly solves the problem of low efficiency of reservoir oil displacement in tertiary oil recovery process of oil reservoir with hypersalinity due to surfactants. The compound surfactant composition comprises an anionic surfactant and a cationic surfactant, the mol ratio of the anionic surfactant and the cationic surfactant is 1:(0.01-100), wherein the cationic surfactant is selected from at least one of quarternary ammonium compounds, and the anionic surfactant is expressed by a molecular general formula shown in a formula (I); M1 and M2 are independently selected from any one of ammonium ion or alkali metal ion, and R is anyone of H, C1-C10 fatty group or aromatic base. The technical scheme better solves the problem and can be applied to tertiary oil recovery process of oil reservoir with hypersalinity.

The invention relates to a hydrophobic associative polymer-surfactant binary composition for chemical oil flooding and a composite flooding system thereof, and mainly solves the problem that when a hydrophobic associative polymer existing in the prior art is compounded with a surfactant existing in the prior art, and the concentration of the surfactant is large, the viscosity of the compound system is reduced to affect the oil flooding efficiency of the polymer-surfactant binary composite flooding system, the problem can be well solved by the hydrophobic associative polymer-surfactant binary composition, and the hydrophobic associative polymer-surfactant binary composition can be used in oil recovery in an oil fields. The hydrophobic associative polymer-surfactant binary composition includes the following components: 1) a hydrophobic associative polymer comprising an acrylamide unit and a hydrophobic monomer unit; and 2) a composite surfactant comprising alkyl amido betaine, alkylbetaine and an aromatic acid salt in a mass ratio of (1 to 60): (1 to 60) :(20 to 60); wherein the mass ratio of the hydrophobic associative polymer to the composite surfactant is (0.5 to 3): (0.1 to 5).

The invention relates to the technical field of oil and gas exploitation, in particular to preparation of a nanometer microemulsion and application of the nanometer microemulsion in improving the gasproduction rate of a gas field. The nanometer microemulsion comprises the following components: 35 to 55 parts of an oil-based solvent, 20 to 40 parts of a water-soluble monomer, 5 to 10 parts of a cationic surfactant, 3 to 6 parts of an anionic-nonionic surfactant, 1 to 4 parts of a lipophilic emulsifier, 0.5 to 1.5 parts of a hydrophilic emulsifier and 0.3 to 0.8 part of a surface active synergist. The preparation method comprises the steps of oil phase preparation, water phase preparation, an oil phase-water phase mixed reaction and the like. The nanometer microemulsion can form ultralow interfacial tension with oil gas, so cohesion between the oil gas is effectively overcome, outflow of the oil gas is facilitated, and the gas production rate of a gas field is greatly increased; in addition, the microemulsion is not prone to adsorption and elution in the exploitation process of the gas field, surface activity loss is low, and therefore, oil gas production cost is reduced.

The invention relates to a surface active agent composition for chemical displacement of reservoir oil, and a preparation method and application thereof, and mainly solves the problems of poor displacement efficiency in a tertiary oil recovery process, and harm to the stratum and the oil field, corrosion of equipment and pipeline and difficult demulsification due to oil inorganic alkali contained in displacement system. The invention adopts the surface active agent composition comprising a cationic surface active agent and an anionic-non-ionic surface active agent. The cationic surface active agent is at least one selected from the group consisting of quaternary ammonium salt or quaternary ammonium alkali; and the anionic-non-ionic surface active agent is represented by a molecular general formula shown as (A) or (B), wherein M represents one of an alkali metal, an alkaline earth metal and ammonium, m and n are selected from 0-14, and x and y are selected from 0-100. The technical scheme well solves the above problems, and can be used in tertiary oil recovery process.

A method for smearing liquid metal on a heat generating surface or a heat conducting surface is suitable for coating the heat generating surface or the heat conducting surface of a target object, andthe method for smearing comprises an squeezing injecting step and a uniform coating step. In the squeezing injecting step, the liquid metal is squeezed out of an injector into the heat generating surface, the heat conducting surface or other containers. In the uniform coating step, a tool is in contact with the liquid metal, force is applied to the liquid metal to destroy the cohesion of the liquid metal, and then the tool is operated to perform smearing back and forth so that the heat generating surface or the heat conducting surface is uniformly coated with the liquid metal. The cohesion ofthe liquid metal is destroyed by applying the external force, so that the liquid metal is not spherical any more, and finally, the heat generating surface or the heat conducting surface of the targetobject is uniformly coated with the liquid metal by driving the tool back and forth, so that the effects of overcoming the cohesion of the liquid metal and achieving uniform coating are achieved.

The invention provides a preparation method of nanoscale ultramicro wall-broken freeze-dried fruit powder. The ultramicro wall-broken freeze-dried fruit powder is made through the process steps of fresh fruit selecting, ultrasonic cleaning, fruit primary process treatment, wall-breaking crushing, spectrum quick detection system, multistage separation, preliminary concentration, vacuum low-temperature drying, preliminary crushing, ultramicro crushing, vacuum packaging and the like. Beneficial components of fruit pulp and harmful components of pesticide residue heavy metal are analyzed through aspectrum quick detection system, characteristics of the beneficial components of the fruit pulp and the harmful components of the pesticide residue heavy metal are obtained through atlas comparison,fruits can be made into the nanoscale ultramicro wall-broken freeze-dried fruit powder, crushing can be conducted in a low-temperature state, the speed is high, crushing can be completed instantaneously, and thus bioactive components of the powder are retained to the utmost extent, so that a needed high-quality product is made advantageously.

The invention relates to a hydrophobic association polymer-surfactant composition and a binary combination flooding system, and mainly solves the problem that the oil displacement efficiency of polymer-surfactant binary combination flooding is affected by reduction of the viscosity of a compounded system under the condition of a relatively large concentration of a surfactant during compounding ofa hydrophobic association polymer and a conventional surfactant in the prior art. By adoption of a technical scheme that the hydrophobic association polymer-surfactant binary combination flooding composition is prepared from the following components: the hydrophobic association polymer and a compound surfactant according to a mass ratio of (0.5 to 3):(0.1 to 5), and the compound surfactant is prepared from alkyl amido betaine, lauryl betaine and aromatic acid salt according to a mass ratio of (1 to 60):(1 to 60):(20 to 60), the problem is well solved, and the hydrophobic association polymer-surfactant composition can be applied to oil extraction in an oil field.

The invention relates to an efficient tackifying hydrophobic associative polymer-surfactant composition and a composite flooding system, and mainly solves the problem that when a hydrophobic associative polymer existing in the prior art is compounded with a surfactant existing in the prior art, and the concentration of the surfactant is large, the viscosity of the compound system is reduced to affect the oil flooding efficiency of the polymer-surfactant binary composite flooding system, the problem can be well solved by the hydrophobic associative polymer-surfactant binary composition, and thehydrophobic associative polymer-surfactant binary composition can be used in oil recovery in an oil fields. The hydrophobic associative polymer-surfactant binary composition includes the following components: a hydrophobic associative polymer and a composite surfactant in a mass ratio of (0.5 to 3): (0.1 to 5), wherein the composite surfactant comprises alkyl amido betaine, alkylbetaine and naphthalenesulfonate in a mass ratio of (1 to 60): (1 to 60) :(20 to 60).

The invention provides a constant-temperature intelligent controlled traditional Chinese medicinal herbal liquid stirrer, and belongs to the technical field of stirring equipment. The stirrer comprises a spherical stirring tank for stirring a medicinal liquid, wherein connecting rods are connected with middle parts on two sides of the spherical stirring tank through a supporting seat, and are positioned above a bearing bottom plate; at least four groups of damping wheels are arranged under the bearing bottom plate; a charge hopper is connected with the upper end of the spherical stirring tank,and a discharge hopper is connected with the lower end of the spherical stirring tank; a cutter set and an arc stirring rod are arranged inside the spherical stirring tank; a battery valve is arranged in the center of the charge hopper; baffles are connected with the inner wall of the charge hopper in an alternate manner; and rollers are arranged under the baffles. The device is good in insulation effect and high in stirring speed, the stirred medicinal liquid is relatively uniform and high in mixing degree, and the release speed of effective ingredients of medicinal materials can be promoted.

The invention relates to an expansion shell bearing plate. The expansion shell bearing plate comprises a tapered bearing plate, a through hole allowing a rod body of an anchor rod is formed in the center of the tapered bearing plate in the axial direction, the tapered bearing plate is provided with a flat plate part and a tapered part, a connecting end and a free end are arranged at the two ends of the tapered part in the axial direction, the outer diameter of the connecting end is larger than that of the free end, an annular extrusion table is formed at the joint of the connecting end and theflat plate part, and the annular extrusion table is provided with a first annular yielding pad. According to the anchor rod, when prestress is applied, due to the fact that the first annular yieldingpad is arranged on the annular extrusion table, a second annular yielding pad is fixed to the end face of the free end, and the tapered bearing plate can release certain deformation when extruding agrouting material, that is, certain 'yielding' deformation is produced. In the process of 'yielding', the tapered surface of the tapered part can extrude the surrounding grouting material in the radial direction, thus the grouting material produces radial expansion, then extrudes surrounding rock and earth mass, consequently normal stress of the interface between the grouting material and the rockand earth mass is greatly increased, the bonding strength of the interface between the grouting material and the rock and earth mass can be significantly enhanced, and thus the uplift bearing capacity of the anchor rod is greatly improved.

The invention relates to the field of release agents, and particularly discloses an anticorrosive concrete water-based release agent and a preparation method thereof. The release agent is prepared from the following raw materials: 10 to 20 parts of tall oil lubricant; 5-8 parts of an imidazoline quaternary ammonium salt preservative; 5 to 10 parts of a nonionic surfactant; 3-6 parts of an anionic surfactant; 1-4 parts of an emulsifier; 3-5 parts of a thickening agent; 6-9 parts of paraffin; 40 to 70 parts of water; the preparation method comprises the following steps: mixing the tall oil lubricant, the paraffin and the emulsifier, adding the mixture into water, heating to 40-50 DEG C, and stirring at a constant temperature for 30-40 minutes to obtain a solution a; adding a nonionic surfactant, an anionic surfactant and an imidazoline quaternary ammonium salt preservative into the solution a, and continuously stirring for 30-40 minutes to obtain a solution b; and finally, adding the thickening agent into the solution b, and continuously stirring for 1-1.5 hours to obtain the anticorrosive concrete water-based release agent. The mold has the advantage of good demolding effect.