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Downhole fluid sensing device and fluid velocity measurement system using the same

A sensing device, the technology of fluid flow rate, which is used in measurement, wellbore/well components, earth-moving drilling, etc., can solve the problems of different fluid flow rates, low measurement accuracy, and easy interference of flow meters

Inactive Publication Date: 2017-04-19
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a downhole fluid sensing device and a fluid flow rate measurement system using the device. The grating is used to sense the pressure exerted on the pipe wall when the fluid in the pipe flows. It is also different, and then according to this pressure difference, the fluid flow rate in the pipe is obtained, which solves the problems that the flow rate meter in the prior art is easily disturbed, has a large volume, and has low measurement accuracy.

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  • Downhole fluid sensing device and fluid velocity measurement system using the same
  • Downhole fluid sensing device and fluid velocity measurement system using the same
  • Downhole fluid sensing device and fluid velocity measurement system using the same

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0042] figure 1 It is a schematic structural diagram of the downhole fluid sensing device 100 of the present invention, as figure 1 As shown, the downhole fluid sensing device 100 includes a Venturi tube 12, a pressure guide tube 13, a partition 7, a first spring 3, a second spring 4, a first piston 5, a second piston 6, a first grating 1, a second Two gratings 2, a venturi tube 12 is used to guide downhole fluid, the venturi tube 12 has an inlet section 14 and a throat section 15, the diameter of the inlet section 14 is greater than the diameter of the throat sectio...

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Abstract

The invention provides an underground fluid induction device and a fluid flow velocity measuring system using the device. The underground fluid induction device comprises a pressure guide pipe, a spacing plate, a first piston, a first spring and a first grating arranged at the left side of the spacing plate, a second piston, a second spring and a second grating symmetrically arranged at the right side of the spacing plate, and a venturi pipe. The device uses the gratings for sensing the pressure applied to the pipe wall by the flowing of a fluid in the venturi pipe; and the flow velocity of the fluid in the pipe is obtained according to the characteristic of different flow velocity of the fluid and different pressure applied to the pipe wall. The device can realize precise fluid measurement under the conditions of limited space and severe environment of underground thousands of oil-gas wells.

Description

technical field [0001] The present invention relates to fluid flow rate monitoring technology, in particular to fluid flow rate measurement technology in the field of petroleum industry, in particular to a downhole fluid sensing device and a fluid flow rate measurement system using the device. Background technique [0002] The flow rate / flow rate of fluid is an important parameter in daily life, industrial production process, energy measurement and environmental protection monitoring. Currently commonly used flow rate / flow sensors include volumetric flowmeters, vortex flowmeters, turbine flowmeters, electromagnetic flowmeters, ultrasonic flowmeters, and acoustic Doppler flowmeters. These flow rate / flow sensors have their own characteristics and scope of application, and have been widely used in daily life and industrial production, but these flow rate / flow sensors also have certain limitations, such as volumetric flowmeters are bulky , It is not suitable for high temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/00
CPCE21B47/00
Inventor 陈少华王伟赵昆孟倩孙世宁
Owner CHINA UNIV OF PETROLEUM (BEIJING)