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115 results about "Pressure volume" patented technology

For a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If volume increases, then pressure decreases and vice versa, when temperature is held constant.

Device and method for testing molecular diffusion coefficients in multi-component oil-gas system under high temperature and high pressure

The invention relates to a device and method for testing molecular diffusion coefficients in a multi-component oil-gas system under high temperature and high pressure. The device consists of an inlet pump 1, an outlet pump 2, an intermediate container, a PVT (pressure-volume-temperature) cylinder 6, an oil-gas separator 7, a gas volume flow meter 8, a liquid phase density analyzer 10 and a chromatographic analyzer 9, wherein, one end of the intermediate container is connected with the inlet pump 1, and the other end of the intermediate container is connected with the PVT cylinder 6; the PVT cylinder is connected with the oil-gas separator 7; the separator is connected with the gas volume flow meter 8 and the liquid phase density analyzer 10; the gas volume flow meter and the liquid phase density analyzer are respectively connected with the chromatographic analyzer 9; and the other end of the PVT cylinder is connected with the outlet pump 2. The device has the advantages of reasonable principle and simple structure, and is convenient in operation; and by utilizing the method, the molecular diffusion coefficients of each component in a multi-component injected gas and actual crude oil system in gas phase and oil phase under the conditions of different reservoir temperature and pressure can be determined, thereby providing reasonable basic data for quantitative evaluation of influence of molecular diffusion effect on the enhancement of the recovery ratio by means of gas injection.
Owner:SOUTHWEST PETROLEUM UNIV

High precision single point positioning system of single frequency global positioning system (GPS) and method

The invention provides a high precision single point positioning system of a single frequency global positioning system (GPS) and a method, which belong to the technical field of GPS positioning. The positioning system is provided with a single frequency GPS receiver which finishes the processing of a GPS baseband signal, tracing of a GPS signal and pressure-volume-temperature (PVT) resolving and provides required GPS observation data and various error correcting information for a precision single point positioning solving module. The receiving of various correction data and loading of information of international GPS service (IGS) precise ephemeris, clock error, ionospheric delay and the like are finished by wireless communication module general packet radio service (GPRS) through wireless networks. The wireless communication module GPRS performs ionospheric delay error correction, satellite clock error correction and satellite track error correction, and utilizes IGS network data to finish precision single point positioning processing. An ARM core plate receives various observation data, satellite-based augmentation system (SBAS) observation data and various correction data of the wireless communication module and performs automatic processing computing of precision single point positioning algorithm. The single frequency GPS high precision single point positioning system and the method have the advantages of being simple in data collection and high in precision, and the feasibility and flexibility of the precision positioning are improved.
Owner:重庆九洲星熠导航设备有限公司

Method for water-flooding abandoned condensate gas reservoirs

The invention discloses a method for water-flooding abandoned condensate gas reservoirs. The method includes performing full fluid PVT (pressure-volume-temperature) analysis first to complete long-core displacement experimental analysis. The long-core displacement experiment mainly includes the steps: selecting core samples on site; testing basic physical-property parameters of cores; splicing the core samples into a long core for displacement experiment, performing natural energy failure experiment, performing displacement in flooding, acquiring recovery rate of water-displacing condensate oil and condensate gas under different conditions according to the experiments, and comparing to determine the waterflood pattern which is most satisfactory to the requirement of increasing recovery rate of condensate gas reservoirs on site; and compiling a condensate gas reservoir water-flooding scheme according to indoor experiment results. The problem that existing depletion development of condensate oil-gas reservoirs is fast in energy decline, causes underground condensate oil loss and is low in production level is solved. Reasonable water-flooding speeds and water-flooding modes are optimally selected by the method and used for water flooding of abandoned condensate gas reservoirs, so that recovery rate of condensate oil-gas reservoirs is effectively increased.
Owner:PETROCHINA CO LTD

Method and device for measuring compression coefficient and expansion coefficient of material on line

The invention relates to a method and a device for measuring and representing the compression coefficient and the expansion coefficient of a material on line. A temperature sensor, a pressure sensor and an ultrasonic probe are respectively arranged on one cross section of a closed material cavity of a pressure-volume-temperature (PVT) calibration device and are used for testing the volume, the temperature T, the pressure P and ultrasonic signals of the closed material synchronously. The sound velocity of the ultrasonic wave, which passes through the material with the thickness l in the material cavity is c=l / delta t within the propagation time delta t; the temperature is maintained constant, and the pressure measurement volume is changed, so that a constant temperature compression coefficient can be obtained; the pressure is maintained constant, and the temperature measurement volume is changed, so that a constant pressure expansion coefficient can be obtained; a material specific volume, a compression coefficient or expansion coefficient and sound velocity correspondence curve is established, and a corresponding equation is obtained by regression; or the compression coefficient (alpha) and the expansion coefficient (beta) can be obtained by the specific volume curve or the state equation. At certain temperature and under certain pressure, the propagation velocity of the ultrasonic wave in the material can be tested on line, and the compression coefficient and the expansion coefficient at the temperature and under the pressure can be obtained by the established corresponding curve or corresponding equation. The method has the advantages of being lossless and being easy in online representation, and the device is simple and convenient to install.
Owner:BEIJING UNIV OF CHEM TECH

Single-converted-to-double low noise amplifier with highly balanced and stabilized differential output gain phase

The invention discloses a single-converted-to-double low noise amplifier with a highly balanced and stabilized differential output gain phase. The amplifier comprises a common source or common emitter input amplifying transistor pair which comprises a first transistor and a fourth transistor, a common gate or common base amplifying transistor pair which comprises a second transistor and a third transistor, a tail current source pipe and output load circuits with tight coupling differential inductors; a fourth inductor L4 and a fifth inductor L5 are tight coupling differential inductors; C1 and C2 are differential capacitors with the same capacitance values; L0 and L1 also are tight coupling differential inductors. For the amplifier disclosed by the invention, since output loads adopt the tight coupling differential inductors L4 and L5 and the differential capacitors C1 and C2 for resonance, the balance and the stability of the differential output gain phase are improved, and the high-impedance tail current source pipe M5 can well restrain a common mode signal. The amplifier disclosed by the invention has excellent robustness when the PVT (Pressure Volume Temperature) and a working frequency point are changed, and at the same time, the amplifier has an excellent anti-interference capacity for the medium base noise.
Owner:CHENGDU CORPRO TECH CO LTD

Soil engineering triaxial shear test equipment based on MTS electro-hydraulic servo tester

The invention discloses soil engineering triaxial shear test equipment based on an MTS electro-hydraulic servo tester. The soil engineering triaxial shear test equipment comprises the MTS electro-hydraulic servo tester, wherein a soil engineering triaxial shear testing device is mounted on an MTS electro-hydraulic servo tester upper chuck and an MTS electro-hydraulic servo tester lower chuck of the MTS electro-hydraulic servo tester. The soil engineering triaxial shear test equipment has the following technical effects as follows: an accurate and stable force source is provided through sufficient utilization of the MTS electro-hydraulic servo tester, perpendicular pressurization on a sample is realized through an upper fixing rod and an axial drive rod, increasing and stabilizing of the confining pressure and the back pressure of the sample are realized through matching of a fed liquid of a liquid feeding port and a pressure volume controller, finally, back pressure saturation, isotropy and anisotropy of consolidation loading and unloading circulation, K0 solidification, creep solidification and dynamic and static triaxial shear test of the sample can be performed on the sample through close matching of components, the test process is controlled through software, the operation is simple and convenient, the automation degree is high, and the soil engineering triaxial shear test equipment is suitable for research, popularization and application; the equipment is simple and compact in structure, convenient to assemble, low in cost, high in measurement accuracy and good in stability and occupies small space.
Owner:XIANGTAN UNIV

Lifting device gravitational potential energy pressure-volume storage system

The invention discloses a lifting device gravitational potential energy pressure-volume storage system. According to the system, an electro-hydraulic compound energy recovery system is additionally arranged based on a lifting mechanism hydraulic cylinder inlet and outlet oil port system and is further composed of a hydraulic motor/pump, a motor/electric generator, a super-capacitor module and an energy accumulator. An inlet/outlet oil port of the hydraulic motor/pump communicates with a lifting hydraulic cylinder through a control valve, and the other oil port of the hydraulic motor/motor communicates with the energy accumulator. An output shaft of the hydraulic motor/pump is connected with an output shaft of the motor/electric generator. The super-capacitor module is connected to a rotary speed controller DC bus of the motor/electric generator. According to the lifting device gravitational potential energy pressure-volume storage system, the gravitational potential energy in the dropping process of the lifting mechanism is stored into the energy accumulator and a super-capacitor without throttling losses through the hydraulic motor/pump and the motor/electric generator, the part of energy stored can be recycled without throttling losses, machine working efficiency is improved, operating cost is reduced and emission pollution of an engine is reduced.
Owner:TAIYUAN UNIV OF TECH

Method and device for simulating black oil reservoir

The invention provides a method and a device for simulating black oil reservoir. The method comprises the following steps of according to component fluid seepage parameters, establishing a component model for describing a black oil reservoir fluid seepage rule; according to the required data for simulating black oil based on the black oil model, performing numerical discretization on the component model, so as to obtain a component number model based on a discrete network of a black oil reservoir geological model; according to fluid PVT (pressure-volume-temperature) data, establishing a component phase balance parameter list; according to the component phase balance parameter list and the evaluation values of the component fluid seepage parameters, performing flash calculation, so as to obtain the fluid phase state and applicable physical parameter; according to the fluid phase state and applicable physical parameter, adjusting the component number model; according to the evaluation values of component fluid seepage parameters and the adjusted component number model, calculating, so as to obtain the oil reservoir pressure change value and the saturation change value of each fluid phase; judging whether the oil reservoir pressure change value and the saturation change value of each fluid phase are convergent or not; when the oil reservoir pressure change value and the saturation change value of each fluid phase are convergent, calculating, so as to obtain the oil reservoir pressure and the saturation of each fluid phase. The method has the advantage that the extendability of oil reservoir number simulation architecture is improved.
Owner:PETROCHINA CO LTD
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