84results about How to "Low starting pressure" patented technology

The invention relates to a water block removal agent and a preparation method thereof. The water block removal agent at least comprises the following components in percentages by mass: 0.1-0.5% of first modified nano silicon dioxide modified by a lipopeptid biological surfactant, 0.5-1.0% of second modified nano silicon dioxide modified by a fluorocarbon surfactant, 10-30% of ethylene glycol and the balance of water, wherein the first modified nano silicon dioxide, the second modified nano silicon dioxide, ethylene glycol and water are injected in proportion through injection equipment of the water block removal agent and the components are mixed in the injection equipment to form the water block removal agent. The water block removal agent provided by the invention has the advantages of being convenient to prepare, strong in surface activity, high-temperature-resistant, high-salt-resistant, strong in rock absorption, low in cost and the like.

The invention belongs to a fracturing fluid additive, and in particular relates to a formulation of a gas-well water-lock damage treating agent. The formulation is characterized in that the treating agent is formed by matching the following components in weight percentage: 20.0 to 25.0 percent of benzyltributylammonium bromide or benzyltributylammonium chloride as a main agent, 2.0 to 5.0 percent of polyoxyethylene nonyl phenyl ether or sucrose fatty acid ester as nonionic surfactant, 0.5 to 1.0 percent of SR18Y fluorocarbon surfactant produced by Shaanxi Senrui Science and Technology Co., Ltd, 12.0 to 15.0 percent of dodecyl benzyl dimethyl ammonium chloride or hexadecyl trimethyl ammonium bromide as cationic surfactant, and the balance being distilled water. The gas-well water-lock damage treating agent prepared according to the formulation has the advantages of reducing gas-well water-lock damage, lowering starting pressure, improving the gas phase permeability of rock cores and protecting reservoirs.

The invention relates to a front acid liquid, which is applied to the oil well front acid sand fracturing. The invention is characterized in that the front acid liquid comprises the components by the weight percentages as follows: chlorhydric acid 1.0 to 2.0 percent; acetic acid 4.0 to 8.0 percent; formic acid 1.0 to 2.0 percent; CF-5C 0.4 to 0.7 percent; citric acid 0.08 to 0.12 percent; HJF-94 0.95 to 1.15 percent; COP-1 0.3 to 0.5 percent; clean water for the other. Through the front acid sand fracturing processing of the invention, the connectedness between the container rock and the crevasse and between the inner parts of the crevasses can be improved, therefore the connectedness between the container rock and the mineshaft, and the fracturing can be enhanced to improve the effect of the oil well.

The invention relates to a synthesis method of a nano calcium carbonate-starch composite, belonging to the temporary plugging/shielding technique of reservoir protection. Starch and succinyl oxide react in water phase environment under the catalysis of NaOH, nano calcium carbonate is added 1 to 1.5 hours after the reaction, and glacial acetic acid is used for neutralization. The nano calcium carbonate-starch composite is obtained through purification and vacuum drying. The method provided by the invention has the characteristics of reacting at normal pressure, simple production process, low reaction temperature of between 30 and 50 DEG C, and simpleness and convenience for a purification method due to the use of low-toxicity solvent; and the nano calcium carbonate-starch composite with high purity can be obtained.

The invention belongs to a fracturing fluid additive, and in particular relates to a gas-well water-lock damage treating agent. The agent is characterized in that the treating agent is formed by the following components in weight percentage: 15.0 to 20.0 percent of 2, 3-epoxypropyltrimethylammonium chloride as a main agent, 4.0 to 7.0 percent of nonionic surfactant, 0.5 to 0.8 percent of fluorocarbon surfactant, 5.0 to 8.0 percent of cationic surfactant, and the balance being distilled water. The nonionic surfactant is octylphenol polyoxyethylene ether or dodecyl phenol polyoxyethylene ether. The fluorocarbon surfactant is SR18Y fluorocarbon surfactant which is a product of Shaanxi Senrui Science and Technology Co.,Ltd. The cationic surfactant is di-8/10 alkyl dimethyl ammoniumbromide or tetradecyl dimethyl benzyl ammonium. The gas-well water-lock damage treating agent has the advantages of reducing gas-well water-lock damage, lowering starting pressure, improving the gas phase permeability of rock cores and protecting reservoirs.

The invention relates to a preset pressure-adjustable capillary pressure adjuster, which is characterized by comprising an upstream shell, a downstream shell, a control body, a pressure adjusting assembly and a pressure adjusting spring, wherein one end of the upstream shell is provided with a water inlet; the pipe diameter of the other end of the upstream shell is enlarged; the downstream shell comprises a first cylinder and a second cylinder; the end part of the first cylinder is connected with the pipe diameter enlarged end of the downstream shell; circumferential threads of the control body are connected with the interior of the first cylinder; the middle part of the control body is provided with a through hole; one end of the pressure adjusting assembly is a conical closed end; the other end of the pressure adjusting assembly is an open end; the outer diameter of the open end is enlarged; the pressure adjusting assembly is provided with water inlets near the position of the conical closed end; the pressure adjusting assembly is arranged in the first cylinder; water stop assemblies are arranged between the circumferential direction of the open end of the pressure adjusting assembly and the circumferential direction of the first cylinder; the conical closed end of the pressure adjusting assembly passes through the through hole on the control body; the water inlets near the conical closed end are located in a cavity formed by the upstream shell and the control body; another water stop assemblies are arranged between the pressure adjusting assembly and the control body; and the pressure adjusting spring is sheathed with the periphery of the cylinder of the pressure adjusting assembly.

A real-time online distributive calculation frame implementing method includes steps of 101, sharing JVM (java virtual machine) resources in a MapReduce address space of JVM, wherein the JVM resources include stacks, middleware downloading the stacks and applications operating the stacks; 102, resetting the JVM by the shared JVM resources, to be specifically, initializing the JVM, reusing the middleware and/or sharing the applications; 103, implementing online distributive calculation frame by resetting the JVM. In an affair processing environment of a large-scale cluster operation system, the durable reusable Java virtual machine can accelerate processing speed of Java applications. The durable reusable JVM can increase input and output of affair processing in these environments by providing the following functions, and startup time of MapReduce tasks used for processing massive data is greatly shortened.

The invention provides a diaphragm pump system with liquid or gas as power. The system comprises single-acting diaphragm pumps pairwise arranged, a direction control valve, a communicating pipeline, a fluid power source and the like; each single-acting diaphragm pump includes a pump shell, a diaphragm or piston for separating a working medium from a conveying medium to form corresponding working cavity and conveying cavity, a signal valve, a feed one-way valve and a discharge one-way valve mounted on the conveying cavity, a flow inlet/outlet pipe mounted on the working cavity, an anti-leakage isolation diaphragm mounted on the inner side wall of the pump shell of the conveying cavity and sleeved out of a signal valve trigger piece and the like; the trigger pieces of signal valves are inserted in the inner sides of the pump shells of the conveying cavities; and control signals output by all the signal valves are communicated with corresponding control ends of the direction control valve. The system is used for conveying various materials, can realize utilization of residual pressure and reduction of the noise, eliminates the back pressure resistance, reduces the starting pressure, improves the pump operation efficiency and the like.

The invention discloses a hydraulic system hydraulic cylinder structure meeting higher frequency response requirements and suitable for limited installation space. By integrating a hydraulic cylinderand a valve block, a cylinder barrel of the hydraulic cylinder is integrated with the valve block, so that the problems of connection, positioning and end surface matching of the hydraulic cylinder and the valve block are eliminated, and a servo valve with determined performance is flexibly matched; and a linear bearing and a piston rod are in contact in the form of a rolling pair. According to the hydraulic cylinder structure, the sliding friction force between the piston rod and the bearing can be eliminated, and the starting pressure of the hydraulic cylinder is reduced, so that the movingfrequency of a hydraulic system is increased, and the higher frequency response requirements compared to a traditional contact-type supporting mode are met; the hydraulic cylinder is integrated with the valve block, so that the size of the hydraulic cylinder is reduced, and the hydraulic cylinder is suitable for occasions with limited space; and the performance of the servo valve is selectable compared with the integration of the hydraulic cylinder and the servo valve, so that both low cost and good performance are achieved.

The present invention relates to the technical field of switch machine manufacturing, in particular to a guide-rail piston rack for an electro-hydraulic switch machine, which includes a rack body. Both sides of the rack body are respectively provided with V groove, the lower part of the rack body is provided with an inclined surface, the rack body is slidingly fitted with the inner wall of the oil cylinder seat, and the inner wall of the oil cylinder seat corresponds to the V-shaped groove and the inclined surface. A groove, steel balls are arranged in the groove. The guide rail type piston rack used in the oil cylinder of the present invention changes the previous sliding friction into rolling friction. The friction force is also relatively reduced, the driving power is reduced, and the wear is reduced. The calculated maximum load capacity can reach 300 kg force, which reduces the starting pressure of the oil cylinder, improves the mechanical efficiency and ensures the service life of the oil cylinder.

The invention discloses a high-performance bulldozing device. The high-performance bulldozing device comprises a cab, a hydraulic rod, a bulldozing hopper, a cross beam, a stand column, a vibrating plate, a driving crawler belt and an engine energy recovering device, wherein the bulldozing hopper is connected with the cab through the hydraulic rod; the cross beam is located below the hydraulic rod, and one end of the cross beam is hinged to the bulldozing hopper; one end of the stand column is hinged to the cross beam, the other end of the stand column is connected with the vibrating plate, and a vibrating motor is arranged in the vibrating plate; and the driving crawler belt is driven by an engine, and the engine energy recovering device is used for recovering the energy of tail gas of the engine. The high-performance bulldozing device is simple and practical in structure, soil can be compacted through the vibrating plate after bulldozing, and operation is convenient; and in addition, the energy of the exhaust gas of the engine can be reutilized, energy is saved, and environmental friendliness is achieved.

The invention specifically discloses a direct-action type lateral flow regulator which comprises a water-in connector connected with a water-in pipe, a water-out connector connected with a water-out pipe and a valve core, wherein the water-in connector and the water-out connector are both of a hollow tubular shape; a vertical cylindrical inner cavity is arranged in a shell; the lower end of the water-in connector is fixedly connected with the upper end of the shell; the left end of the water-out connector is fixedly connected with the side wall of the shell; the valve core comprises a shell, an extension spring, a piston sealing ring and a piston disc; the valve core is positioned in the inner cavity; a rotation center axis of the piston disc is coaxial with the rotation center axis of the inner cavity; the piston sealing ring is arranged between the piston disc and the inner cavity and sleeves the peripheral side surface of the disc body; the two ends of the extension spring are welded on the water-in connector and the piston disc respectively; and a sealing cover is arranged in the inner cavity of the shell. The regulator is simple in structure and quick and sensitive in response; and since the valve core directly contacts with the incoming water, the starting regulation pressure is relatively low.

This patent specifically discloses a capillary pressure regulator, including an upstream casing, a downstream casing and a pressure regulating assembly. The upstream casing is in the shape of a hollow barrel, and the outer wall of the lower end of the upstream casing is provided with external threads. The downstream casing is in the shape of a hollow barrel. External threads are provided on the outer wall of the left end of the downstream housing. The pressure regulating assembly includes a housing, a baffle and a rubber ball. The housing is formed with a hollow cavity. The upper part of the housing is provided with a thread that is threadedly connected with the upstream housing. The side of the shell is provided with a threaded hole threaded with the downstream shell, the upstream shell, the downstream shell and the cavity of the shell are connected, the baffle is placed in the cavity and hinged on the shell, the rubber ball is placed Inside the cavity and below the baffle. The pressure regulator has a low starting pressure due to its sensitive response, which not only satisfies agricultural irrigation, but also uses rubber balls as elastic recovery parts to be more reliable.

The invention discloses an efficient energy-saving sewage treatment device.The device is improved from an automobile as a whole.The device comprises a carriage, sewage treatment equipment installed in the carriage, and an engine energy recycling system.The carriage comprises a plurality of reaction chambers.The sewage treatment equipment comprises a pump, a solid-liquid separation pond, an oil isolation pond, a biochemical pond, a filtering pond, a settlement pond, a clean water return pond and a sterilization pond which are sequentially connected through pipelines.Sewage is sequentially treated according to the sequence.The sewage treatment device has the advantages of being high in flowability, small in energy consumption, high in efficiency and the like.