Method and device for preventing air from leaking in manometer
A technology of gas leakage and pressure gauge, which is applied in the direction of earthwork drilling, measurement, wellbore/well components, etc., which can solve the problems affecting the measurement accuracy of pressure gauge, the damage of electronic components, pressure sensors and other parts, and the inability to measure data, etc. problems, to achieve the effect of improving the working life and the reliability and accuracy of the measurement
Active Publication Date: 2012-07-04
贵州航天凯山石油仪器有限公司
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Problems solved by technology
Since the object of monitoring is gas, and the gas molecules are relatively small, it is easy to slowly penetrate into the pressure gauge through the rubber sealing ring in the current pressure sensing head, resulting in pressure inside the pressure gauge, which makes the electronic components inside the pressure gauge , batteries, pressure sensors and other components are damaged; it also seriously affects the measurement accuracy of the pressure gauge, and accurate data cannot be measured
Method used
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Embodiment Construction
[0015] Embodiments of the present invention: the method for preventing gas from leaking into the pressure gauge of the present invention, such as figure 1 shown. The method is to fix the pressure sensor 6 in the central hole 3 with the step 2 of the mounting bracket 1, and a sealing ring 5 is set on the pressure sensor 6. Played the role of shock absorption. A copper washer 4 is placed on the step 2 of the mounting bracket 1, and the pressure sensor 6 is tightly pressed on the copper washer 4 by screwing the compression plug 7 into the mounting bracket 1. Since the copper washer 4 is soft, the pressure The end face of the sensor 6 is closely attached to the copper gasket 4, which plays the role of sealing pressure and isolating fluid; in the mounting bracket 1 at the other end of the compression screw plug 7, a liquid storage joint 8 with a sealing ring is screwed, and the liquid storage joint 8 is provided with a liquid storage cavity 9 and a liquid storage tube 10; the oth...
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The invention discloses a method and device for preventing air from leaking in a manometer. The method comprises the following steps: a pressure sensor is fixed in a center hole of a mounting bracket and is sheathed with a seal ring, wherein the center hole of the mounting bracket is provided with stairs on which a copper washer is laid on, and the pressure sensor is pressed tightly on the copperwasher by a compression screw plug; the mounting bracket at the other end of the compression screw plug is screwed with a liquid storage connector which is sheathed with a seal ring and in the liquidstorage connector, a liquid storage cavity and a liquid storage tube are arranged; the other end of the liquid storage connector is sheathed with a seal ring and screwed with a leakage-proof connector; and the leakage-proof connector and the liquid storage cavity and the liquid storage tube of the liquid storage connector are filled with spacer fluid. The method adopts triple seal with the copperwasher, the spacer fluid and the seal ring, thereby improving the service life of the manometer and the reliability and accuracy of measurement.
Description
technical field [0001] The invention belongs to the field of pressure measurement, in particular to a method and device for preventing gas from leaking into a pressure gauge when measuring gas pressure. Background technique [0002] In the process of gas well recovery pressure (abbreviated as "repressurization") of natural gas wells, pressure testing is an important content. The whole repressurization process takes a long time, often about three months. During this long repressurization process, the downhole pressure must be continuously monitored. This requires the pressure gauge to be placed downhole for a long time to continuously monitor the downhole gas pressure. Since the object of monitoring is gas, and the gas molecules are relatively small, it is easy to slowly penetrate into the pressure gauge through the rubber sealing ring in the current pressure sensing head, resulting in pressure inside the pressure gauge, which makes the electronic components inside the press...
Claims
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IPC IPC(8): E21B47/06E21B47/017
Inventor 冯贵洪曾勇赵智勇王庆
Owner 贵州航天凯山石油仪器有限公司