35results about How to "Realize pressure measurement" patented technology

The invention relates to the field of a pressure sensor, particularly a high-temperature ceramic pressure sensor for a pressure test in a high temperature environment and a processing method of the high-temperature ceramic pressure sensor. The effective pressure test can be implemented in a special high temperature environment for a long time. The high-temperature ceramic pressure sensor comprises a pressure sensing ceramic element, wherein a closed chamber is arranged inside the pressure sensing ceramic element; the upper and lower planes of the pressure sensing ceramic element are respectively provided with an electrode layer and a planar spiral inductor; the two electrode layers form a capacitor; and the capacitor is connected in series with the two planar spiral inductors to form an LC loop. The processing steps are as follows: a, curtain coating; b, punching; c, stacking and filling; d, laminating and thermal cutting; e, high-temperature sintering; f, printing and low-temperature sintering; and g, cavity sealing. The sensor and the method disclosed by the invention can design and realize a concrete structure of sensitive elements of the sensor at a totally new angle; the structure is ingenious and reasonable; and a passive wireless high-temperature ceramic pressure sensor for the detection in a noncontact wireless manner based on an LC resonance theory is realized, so that the pressure test can be performed for a long time at a high temperature higher than 300 DEG C.

The invention discloses an oil well on-line flow closure metering device. The oil well on-line flow closure metering device comprises a metering shell, wherein an oil inlet and an oil outlet are formed in the upper end and the lower end of the metering shell respectively, a separating plate is arranged in the middle of the interior of the metering shell, and an inner cavity of the metering shell is divided by the separating plate into a preservation cavity and a metering cavity; an overflow pipe and a metering inlet are arranged on the separating plate, and the preservation cavity and the metering cavity are communicated through the overflow pipe and the metering inlet; a weighing hopper is supported in the metering cavity through weighing sensors, an upper opening of the weighing hopper is opened, and is correspondingly communicated with the metering inlet, and a metering outlet is formed in the bottom surface of the weighing hopper; a control device comprises two gravity valves, wherein the gravity valves are arranged in a hanging mode, and correspond to the metering inlet and the metering outlet respectively; the control device is electrically connected with the weighing sensors, and is used for executing alternate control over opening and closing movement of the metering inlet and the metering outlet according to data measured by the weighing sensors. The oil well on-line flow closure metering device has the advantages that metering accuracy is high, the oil well on-line flow closure metering device does not need to be attended by workers, the liquid production capacity can be metered in real time, manual metering can be replaced, pressure-bearing metering can be achieved, working reliability is high, and the service life is long.

The invention discloses a micro mud floating electronic pressure gauge, a working method thereof, and a pressure measurement device, relates to the field of oil and gas extraction, and aims to provide a device for measuring underground pressure and temperature in the mud drilling process in real time, and a working method thereof. The technical key point is that: a button cell, a singlechip with acquisition software, a circuit board, a connection block, and a pressure chip are stacked in a shell sequentially from bottom to top; the shell is a cylindrical shell of which the upper and lower ends are provided with openings, and the interior and the exterior of the shell are isolated by isolation protective adhesive; the pressure gauge acquires temperature and pressure information intermittently under a well; and the pressure measurement device comprises the pressure gauge, a data loading system, and a pressure and temperature calibrating device. The pressure gauge is as small as drill cuttings, so the pressure gauge can float in mud and move along with mud, measure pressure timely and recover data, and does not influence the drill construction.

The invention discloses a novel transmissible pressure and differential pressure transmitter for measuring pressure of an ultrahigh temperature medium. A measuring diaphragm and an isolating diaphragm are respectively welded on the outer end faces of a connecting flange and an isolating flange, a radiating tube is welded between the connecting flange and the isolating flange, and then ultrahigh temperature resistant high-viscosity high-temperature tube filling liquid is injected to form an ultrahigh temperature tube filling liquid cavity; and a matching flange is welded on the other end of the isolating flange to connect a stainless steel capillary tube and the pressure and differential pressure transmitter, and low-viscosity high-temperature tube filling liquid is injected to form a normal high-temperature tube filling liquid cavity. In the working process, the pressure of the ultrahigh temperature medium is transmitted to the isolating diaphragm through the ultrahigh temperature resistant high-viscosity high-temperature tube filling liquid, and then transmitted to the main body of the pressure and differential pressure transmitter through the low-viscosity high-temperature tube filling liquid in the stainless steel capillary so that the pressure transmission and measurement are realized. By means of high temperature isolation and radiation, the ultrahigh temperature is not directly transmitted to the low-viscosity high-temperature tube filling liquid so as to protect the high-temperature transmissible pressure and differential pressure transmitter and realize the pressure measurement of the ultrahigh temperature medium.