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Micro-pressure differential metering device for high-pressure experiments

A measurement device and high-pressure experiment technology, which is applied in the measurement device, the pressure difference measurement between multiple valves, and the measurement of fluid pressure. Effect

Active Publication Date: 2017-02-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing micro-pressure differential sensor, when measuring a differential pressure of 0.05 MPa, the rupture pressure of the sensor diaphragm is only 2 MPa, which is difficult to meet the requirements of high-pressure experiments

Method used

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Embodiment Construction

[0018] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0019] Such as figure 1 As shown, the present invention provides a micro-pressure differential metering device 100 for high-pressure experiments, which includes a screw lifter 24, a grating ruler 25, a first high-pressure resistant piezometric tube 1, a second high-pressure resistant measuring tube, and a vertically arranged screw lifter 24 in sequence. pressure tube 2 , the third high pressure pressure measuring tube 3 and the fourth high pressure pressure measuring tube 4 . Wherein, the top of the first high pressure pressure measuring tube 4 is connected in parallel with the first valve 5, the second valve 6 and the ninth valve 29; the other end of the first valve 5 is connected to the top of the second high pressure pressure ...

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Abstract

The invention discloses a micro-differential-pressure metering device for a high-pressure experiment. High-pressure-resistant piezometric tubes are arranged in annular inductive transducers which are connected with a data acquisition control processing system, and the annular inductive transducers are further connected with a slider on a screw lift. The screw lift drives the slider to move up and down so as to control the annular inductive transducers to slide up and down on the outer walls of the high-pressure-resistant piezometric tubes to recognize positions of interfaces of two manometric fluids different in density and electric property. A grating scale is adopted for precisely measuring heights of the interfaces of the two manometric fluids different in density and electric property and transmitting the measured height data to the data acquisition control processing system. The data acquisition control processing system is capable of realizing data receiving and control of a lifting motor. By the aid of manometric fluid injection pumps, the two manometric fluids different in density and electric property are injected into the piezometric tubes. The number of the piezometric tubes in service can be selected by controlling on and off of valves, so that a differential pressure measurement range can be broadened.

Description

technical field [0001] The invention relates to a differential pressure measurement technology, relates to the measurement of micro-pressure differences in micro-flow and seepage experiments in high-pressure environments, and in particular to a micro-pressure measurement device for high-pressure experiments. Background technique [0002] The pressure of simulation experiments related to the exploitation of tight oil and gas reservoirs can reach tens or even nearly hundreds of MPa, while the pressure difference at ultra-low flow rates is only 10 -2 megapascal level. At present, most of the micro-pressure sensors used in laboratory and industrial micro-pressure measurement are piezoelectric sensors. The principle of the piezoelectric sensor is to sense the pressure through the pressure measuring diaphragm to determine the pressure. If it is to be used in a high-pressure environment, it needs to be realized by thickening the pressure measuring diaphragm. Because the thicker ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L13/00
Inventor 岳湘安安维青张立娟方欣冯雪钢
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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