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High-temp resisting petroleum downhole dynamic pressure sensor

A technology of dynamic pressure and oil wells, applied in fluid pressure measurement by changing ohmic resistance, electric solid devices, wellbore/well components, etc., can solve the problem of difficult measurement of downhole pressure in oil and gas wells, and achieve the effect of high sensitivity

Inactive Publication Date: 2004-03-24
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-temperature-resistant petroleum downhole dynamic pressure sensor to solve the problem that it is difficult to measure the downhole pressure of oil and gas wells under the conditions of increasing oil layer depth, temperature rise, and low flow rate or low pressure.

Method used

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  • High-temp resisting petroleum downhole dynamic pressure sensor
  • High-temp resisting petroleum downhole dynamic pressure sensor
  • High-temp resisting petroleum downhole dynamic pressure sensor

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[0011] specific implementation plan

[0012] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0013] according to figure 1 , the sensor is composed of elastic element 2, main protection cover 3, secondary protection cover 7, SOI silicon micro solid piezoresistive chip 5, high temperature circuit board 6 and high temperature transmission wire 4, elastic element 2 and main protection cover 3, secondary The protective cover plate 7 is connected together by screws 8, and the elastic element 2 is designed as a T-shaped cantilever beam structure, that is, a downward cantilever beam 2 (1) is designed at the bottom right of the elastic element 2, and the cantilever beam 2 on the elastic element 2 The upper part of (1) is designed with a step, and the SOI silicon micro-solid piezoresistive chip 5 is bonded under the step of the elastic element 2 cantilever beam 2 (1) through eutectic welding or other packaging processes, ...

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Abstract

The invention discloses a high-temperature resistant downhole micro-dynamic pressure or micro-flow sensor, composed of elastic component, primary protective cover board, secondary protective cover board, SOI silicon micro-solid piezoresistive chip and connecting screw, the former three things linked together by the screw, the elastic component designed into the cantilever girder which is set withthe SOI silicon micro-solid piezoresistive chip, whose top is set inside the protective cover board and whose under part outside the protective cover board extends through into the channel with the fluid. It changes the length, width and thickness of the girder to resolve the measuring problem. It has characters of good dynamic property, high-temperature resistance and high measuring precision.

Description

technical field [0001] The invention relates to a pressure sensor, in particular to a high temperature resistant dynamic pressure or micro flow sensor used in downhole. Background technique [0002] There are roughly two known oil and gas well pressure testing systems. One is the oil and gas well pressure testing system with a helical spring tube pressure gauge as the core. This type of instrument has low measurement accuracy, narrow range and applicable temperature at 200 The second type is a modern oil and gas well pressure test system with a storage electronic pressure gauge as the core. This pressure gauge generally uses silicon-sapphire or quartz as the sensitive element, and uses an integrated The circuit design technology has the characteristics of small volume and large storage capacity. The main parameters can basically meet the test needs of oil and gas wells with a reservoir depth of 3500m and a temperature of 130°C. However, with the increase of reservoir depth a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/017E21B47/06G01L9/06H10N99/00
Inventor 赵玉龙蒋庄德赵立波
Owner XI AN JIAOTONG UNIV
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