44results about How to "Good flow control" patented technology

The invention discloses a load sensitive pressure compensation multiway valve for an excavator, which includes a valve body, nine operating valves sequentially arranged on the valve body, as well as an oil inlet and an oil return opening arranged at the left end of the valve body, wherein oil inlets are arranged on the nine operating valves respectively; the valve body adopts an integral structure formed by integral casting; an oil inlet channel and an oil return channel are arranged inside the valve body; valve rods are arranged inside the valve body; pilot valves are arranged at the two ends of the valve rods respectively; and a flow control valve, a load feedback valve, a safety valve, a pressure compensation valve, an oil filling valve, an overload overflow valve and a one-way inlet valve which correspond to all the operating valves as well as connecting oil chambers among all the operating valves are arranged on the valve body. The load sensitive pressure compensation multiway valve has the advantages of low cost, compact structure, low pressure loss, excellent flow control property during operation, and the realization of functions of flow control, pressure compensation, automatic oil filling, safety protection and the like.

The invention discloses a novel anti-shearing branch polymer oil displacement agent and a synthetic method thereof. According to the technical scheme, the following raw materials and monomers in mass percent are used: 73.5-84.95% of acrylamide (AM), 15-25% of sodium acrylate NaAA and 0.05-1.5% of polyamidoamine modified branch skeleton GA taking 1,3-propane diamine as a core. The synthetic method of the novel anti-shearing branch polymer oil displacement agent comprises the following steps of: adding NaAA into a reactor, adding pure water, regulating pH to be 6.5-7.5 with NaOH, stirring and adding AM and GA, preparing a solution with the concentration of 15-30%, introducing nitrogen for 20 minutes, then adding an initiating agent, continuously introducing the nitrogen for 10-20 minutes, and reacting for 3-10 hours at 30-60 DEG C; and finally washing, smashing and drying, thus an AM/NaAA/GA ternary polymer is obtained. The novel anti-shearing branch polymer oil displacement agent shows good shearing dilutability, the problem of injection of medium and low permeation oil reservoirs can be better solved, under lower shearing action, viscosity of the polymer can be rapidly restored, good fluidity control ability and aqueous phase permeability reducing capacity are realized, capacity of a polymer solution for expanding swept volume is improved, and simulated crude oil recovery ratio can be effectively increased by about 12.3%.

The invention relates to a microemulsion system and a preparation method thereof, in particular to a polyacrylamide microsphere system and a preparation method and application thereof. The microspheresystem is prepared through an emulsion polymerization reaction under the action of a composite initiator. The emulsion system comprises the following components in percentage by mass: 10%-60% of a monomer, 0.1%-3% of an organic salt, 3%-20% of an emulsifier, 0.01%-2% of a co-emulsifier, 0.01%-1% of a cross-linking agent, 0.001%-0.5% of an initiator, 0.001%-1% of a polymerization auxiliary agent,10%-70% of deionized water and 10%-50% of a non-polar solvent. The polymer microsphere system is used as an interface enhancer for emulsion flooding, can effectively improve the expansion modulus andshear modulus of an emulsion interface, and enhances emulsion stability; and after compounding polymer microspheres and a surfactant, a very good fluidity control effect is obtained and the profile control and flooding capacity of emulsion flooding is improved.

The invention discloses a water-soluble hydrophobic associated polymer oil displacement agent and a synthesis method thereof. The synthesis method includes: copolymerizing, by mass, 53.5-59.9% of AM (acrylamide), 40-45% of AA (acrylic acid) and 0.1-1.5% of DNDA (N, N-diallyl oil imide), and then, performing sulfonated modification for terpolymers by using formaldehyde and sodium bisulfite as sulfonating agents, wherein the components in sulfonation include, by mass, 90.0-95.0% of the AM/AA/DNDA terpolymers and 5.0-10.0% of the sulfonating agents composed of the sodium bisulfite and the formaldehyde, and the ratio of the sodium bisulfite to the formaldehyde is 2:1-5:1. The polymer oil displacement agent is good in temperature resistance and salt tolerance and is capable of achieving better fluidity control capability, reducing water-phase permeability, improving polymer solution swept volume expanding capability and effectively increasing simulated oil recovery ratio.

The invention provides a load sensitive forklift multi-way valve, and belongs to the technical field of engineering machinery hydraulic components. The load sensitive forklift multi-way valve comprises an oil inlet valve piece, a lifting valve piece, an inclined valve piece, a fitting valve piece and an oil return valve piece. All the valve pieces are provided with flow control valve rods and oil inlet one-way valves respectively, the inclined valve piece is provided with a load maintaining valve, and the oil return valve piece is provided with an unloading valve core, a reset spring, a shuttle valve and a secondary overflow valve. The load sensitive forklift multi-way valve has good flow control performance, so that the speed of an executing mechanism is unrelated to the load pressure and is only associated with the stroke of the valve rods, and the pressure of a system is unrelated to flow change of oil feeding. Meanwhile, the inclined valve piece is provided with the load maintaining valve, so that the forwards leaning pressure keeps stable all the time, load on an oil cylinder is lowered, when the system flow is larger than the required flow, oil return is conducted on the redundant flow through the unloading valve core, energy consumption can be effectively reduced, and the load sensitive forklift multi-way valve is high in efficiency and less in power loss, so that fuel is saved and a hydraulic system is lower in heating quantity.

The invention relates to a plugging agent for postponing colloid foam and a method thereof for oilfield high-water-content aquifer profile modification water plugging. The plugging agent is composed of a foaming agent system solution and gas, wherein the foaming agent system solution is formed by uniformly dispersing 0.05-0.30% of foaming agent, 0.4-0.6% of water-drum aqueous emulsion polymer and 0.2-0.4% of multiplex emulsion crosslinking agent; and the volume ratio of the foaming agent system solution to the gas under reservoir pressure is 1:(1-3). The plugging agent for postponing colloid foam is used for oilfield high-water-content aquifer profile modification water plugging, and can enhance the oil recovery rate. The invention also provides a method for oilfield high-water-content aquifer profile modification water plugging. The plugging agent has the advantages of high dissolution rate, easy preparation, low initial viscosity and the like, can satisfy on-line injection, enhances the site operability, and saves the construction time and input cost.

The invention discloses a dielectric barrier discharge plasma exciter and system, belongs to the field of a plasma exciter and is designed to solve the problem of low wall jet speed of a conventional device. The dielectric barrier discharge plasma exciter at least comprises a medium body, a first electrode arranged on the surface of the medium body, and a second electrode and a third electrode which are arranged in the medium body, wherein the first electrode, the second electrode and the third electrode are parallel mutually; high-density plasma can be produced between the first electrode and the second electrode; and the third electrode is used for improving the wall jet speed. The dielectric barrier discharge plasma exciter system comprises at least two groups of same exciters above. The dielectric barrier discharge plasma exciter and system can carry out independent control and organic unification on production and pneumatic excitation of plasma, so that the flow control performance of the plasma exciter is improved; and the dielectric barrier discharge plasma exciter and system are wide in application range, and are especially suitable for the field of flow control of the a wing/an engine.

The invention relates to an enhanced oil extraction method, and mainly solves the problem that in the prior art, the oil displacement compositions have bad oil displacement efficiency. The method comprises the following steps: (1) mixing an oil displacement composition with an oil displacement water to obtain an oil displacement system; and (2) contacting the oil displacement system with an oil containing stratum so as to displace the crude oil in the oil containing stratum under simulated oil filed stratum water conditions: oil displacement temperature 20-120 DEG C and total mineralization >5000 mg/L; wherein the oil displacement composition comprises the following components in parts by weight: (1) 1 part of surfactant and (2) 0 (not included) to 50 parts of polymer; the concentration of surfactant in the oil displacement system is 0.001 to 2.0 wt%, and the polymer concentration is 0 to 1.8 wt%. The method well solves the abovementioned problem and can be applied to oil displacement composition production and tertiary oil recovery.

The invention provides a method for improving the crude oil recovery ratio in an underground oil reservoir in a later period of oil field oil recovery. The method comprises the following steps of: a, injecting an ultra-high-molecular polymer solution into an injection well subjected to polymer-activating agent binary compound flooding to be used as a pre-slug, wherein the injection quantity is 0.05 to 0.1 time of stratum void volume, the concentration of ultra-high-molecular polymers is 1800 to 2300mg/L, and the viscosity is greater than 80mPa.s; and b, compounding the ultra-high-molecular polymers with the concentration being 1800 to 2300mg/L and the viscosity being 50mPa.s or above and anionic-non-ionic surfactants with the concentration being 2000 to 5000mg/L and the interface tension being smaller than 5.0*10<-3>mN/m according to the weight part mixture ratio being (0.15 to 0.18): (0.2 to 0.5); uniformly stirring the mixture; and injecting the mixture into the injection well, wherein the injection volume is 0.1 to 0.3 time of the stratum void volume; and c, finally injecting an ultra-high-molecular polymer solution with the concentration being 800 to 1200mg/L and the viscosity being 20 to 30mPa.s into the injection well to be used as a substrate protective slug, wherein the injection volume is 0.05 to 0.1 time of the stratum void volume.

The invention discloses a novel pneumatic membrane valve. The novel pneumatic membrane valve comprises a valve body, a water inlet, a water outlet and a valve base, wherein the water inlet and the water outlet are formed in the two sides of the valve body correspondingly. An air chamber is arranged at the upper end of the valve body. The air chamber is sequentially divided by a membrane into a membrane chamber upper cavity and a membrane chamber lower cavity from top to bottom. A valve rod is arranged in the valve body in a penetration manner. A spring is arranged at the upper end of the valverod. The spring is arranged in the membrane chamber lower cavity and abuts against the lower surface of the membrane. A valve element is connected to the bottom of the valve rod. A valve element protection cover is arranged at the upper portion of the valve element and fixedly connected with the inner side wall of the valve body. The upper surface of the valve base is connected with a valve platethrough a rotation shaft. The valve element is arranged over the valve plate. A reset spring is connected to the other end of the valve plate, and the other end of the reset spring is fixed to the inner side wall of the valve body. The novel pneumatic membrane valve is provided with the valve element protection sleeve, fluid is prevented from directly scouring the valve element, the possibility that the valve element is scoured and eroded by fluid is reduced, and the service life of the valve is prolonged.

The invention discloses an iodine working medium electric propulsion storage and supply system based on sonic nozzle flow control. The system comprises a control module, a square iodine storage tank, an iodine storage tank pressure sensor, a switch self-locking valve, a pressure regulating gas capacitor, a pressure regulating gas capacitor pressure sensor, a sonic nozzle assembly, a cathode supply pipeline and an anode supply pipeline. The square iodine storage tank, the switch self-locking valve, the pressure regulating gas capacitor and the sonic nozzle assembly are sequentially connected through a pipeline; the cathode outlet of the sonic nozzle assembly is connected with the cathode supply pipeline, and the anode outlet is connected with the anode supply pipeline; the pressure regulating gas capacitor pressure sensor is mounted on a pipeline between the pressure regulating gas capacitor and the sonic nozzle assembly; a pressure regulating gas capacitor heater covers the outer surface of the pressure regulating gas capacitor; and a pipeline temperature control module is coated on pipeline parts except the square iodine storage tank and the pressure regulating gas capacitor. According to the invention, the modular design of the iodine working medium electric propulsion storage and supply system is facilitated, the cost is reduced, and the system reliability and the accurate flow control capability in a high-temperature environment are improved.

The invention discloses a pneumatic valve positioner for a pneumatic diaphragm control valve and a positioning method, and belongs to the field of control valves and valve positioners. The problem that according to the pneumatic diaphragm control valve, a valve rod is positioned inaccurately due to the fact that friction force between the valve rod and filler is large is solved. The pneumatic valve positioner is composed of an air pressure transducer, a lever, a range spring, a feedback cam pivot, a feedback cam, an oscillating bar, an oscillating bar pivot, a feedback rod, a rolling wheel, a feedback spring, a regulating spring, a baffle, a nozzle, a lever pivot, a barometric amplifier, the pneumatic diaphragm control valve, a diaphragm air chamber and a valve rod. The positioning method comprises the steps that 1, air pressure is connected to the air pressure transducer; 2, the positioner is regulated by means of the moment balance principle; 3, the valve rod is positioned at the fixed position. Accurate positioning is achieved between an input air pressure signal and displacement of the valve rod of the pneumatic diaphragm control valve can be achieved.

The invention relates to an oil-displacing composition, a preparing method of the oil-displacing composition and an intensified oil production method to mainly solve the problem that the oil-displacing efficiency of an oil-displacing composition is poor in the prior art. The oil-displacing composition is prepared from, by mass, 1 part of surfactant, 0-50 parts of a polymer which accounts for larger than 0 part and 0-50 parts of alkaline matter which accounts for larger than 0 part, wherein the surfactant is a mixture formed by non-ionic surfactant shown in the formula (1) and anionic surfactant show in the formula (2) at the mass ratio of 1:(0.1-1), R1 and R2 are the same or different C4-C40 aliphatic groups, or the same or different aryl groups replaced by saturated or unsaturated alkyl with C4-C30 linear chains or branched chains, Z1 is -R01Y1, R01 is selected from C1-C5 alkylidene or alkylidene replaced by hydroxyl, and Y1 is selected from SO3M or COON. The problem is well solved through the technical scheme, and the oil-displacing composition can be used for an oil field and intensified oil production. The formula (1) and the formula (2) can be seen in the specification.

The invention relate to a novel spherical valve element. The valve element comprises a valve element body (1) which is integrally spherical, the valve element body (1) is provided with a through flow channel (1.1) and a groove (1.2) used for installing a valve rod, and the flow channel (1.1) is provided with a V-like opening structure and a round opening structure which are provided with semi-arc-shaped heads and are provided with openings in the two ends respectively. The valve element has the advantages of good flow linear proportion, high mechanical strength, corrosion resistance and long service life.