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Differential pressure densimeter pressure protection device

A protection device, density meter technology, applied in the direction of measuring device, measuring fluid pressure, instrument, etc., can solve problems such as instrument failure, irreparable damage to sensor, loss, etc., to achieve short response time, fast and convenient installation, and effective pressure shock Effect

Inactive Publication Date: 2014-01-15
XIAN SITAN INSTR
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Problems solved by technology

[0003] The core component of the differential pressure density meter is the differential pressure sensor. Due to the high pressure of the downhole working environment, it can reach tens of Mpa, but the pressure difference resolved by the differential pressure sensor is only tens of Kpa. If the sensor does not have a corresponding pressure protection device, the downhole pressure will fluctuate. Too much beyond the sensor range will lead to irreparable damage to the sensor, resulting in the failure of the entire instrument and causing losses

Method used

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Embodiment Construction

[0023] The invention provides a pressure protection device for a differential pressure density meter. The pressure protection device for a differential pressure density meter is firstly a bellows assembly. Please refer to figure 1 , the bellows assembly includes a bellows 2, a gland 3, a spring 4 and a bellows base 1; the bellows 2 is set on the bellows base 1; the spring 4 is socketed outside the gland 3; Tube inner chamber 5; bellows base The bellows base 1 is provided with a channel 6 communicating with the bellows inner cavity 5; the spring 4 is pressed on the bellows 2 through the gland 3.

[0024] The differential pressure densitometer pressure protection device also includes a first pressure tube connected with the channel 6 and a second pressure tube connected with the gland 3 and applying pressure to the gland 3 .

[0025] The bellows inner cavity 5 communicates with one end of the micro-differential pressure sensor through a capillary tube, and the outside of the bel...

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Abstract

The invention relates to a differential pressure densimeter pressure protection device which comprises a corrugated pipe, a pressing cover, a spring and a corrugated pipe base. The corrugated pipe is arranged on the corrugated pipe base. The spring is connected to the outer portion of the pressing cover in a sleeved mode. A corrugated pipe inner cavity is arranged in the corrugated pipe. A channel which is communicated with the corrugated pipe inner cavity is arranged on the corrugated pipe base. The spring is pressed on the corrugated pipe through the pressing cover. The differential pressure densimeter pressure protection device is good in stability and can avoid waste.

Description

technical field [0001] The invention belongs to the category of petroleum instruments and meters, and relates to a pressure protection device for a pressure difference density meter, in particular to a protection device for a pressure difference sensor in a pressure difference density meter used for underground oil detection. Background technique [0002] At present, production logging mainly identifies fluids by measuring the density or water holdup of fluids in wells. Most of the densitometers used in domestic oil exploitation are radioactive densitometers, but as oilfields pay more and more attention to safety production, the radiation caused by the radioactive sources in this method has great hidden dangers. The differential pressure density meter does not use radioactive sources, but uses micro-differential pressure technology to calculate the density value according to the differential pressure value of the medium at a certain vertical distance. It has the advantages o...

Claims

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Application Information

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IPC IPC(8): G01L19/06
Inventor 孙大伟黄世幸程诚赵秉玉李斌李永振
Owner XIAN SITAN INSTR
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