Triaxial fiber-optic gyroscope inclinometer

A technology of fiber optic gyroscope and inclinometer, which is applied in the direction of measurement, wellbore/well components, earthwork drilling and production, etc. It can solve the problems of limited application range and poor measurement accuracy, and achieves the advantages of overcoming limitations, small size and good assembly Technological effect

Active Publication Date: 2019-05-21
BEIJING HUARUI JIUIZHOU ENERGY TECH
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  • Abstract
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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a three-axis fiber optic gyro inclinometer to solve the problem of poor measurement accuracy and limited application range of existing fiber optic gyro inclinometers in highly deviated wells and horizontal wells

Method used

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  • Triaxial fiber-optic gyroscope inclinometer
  • Triaxial fiber-optic gyroscope inclinometer
  • Triaxial fiber-optic gyroscope inclinometer

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Embodiment 1

[0031] A kind of three-axis fiber optic gyroscope inclinometer that present embodiment proposes, such as figure 1 , figure 2 and image 3 As shown, the structure includes a cylindrical outer tube 1, an IMU sub-joint 2 and a data processing circuit sub-joint 3 arranged inside the outer tube 1, and a rotating motor sub-joint 4 arranged on the first end of the outer tube 1, and the whole is a long cylinder Shaped structure, the total length of the instrument is about 1481mm, the diameter is about 55mm, and the size is small, which is suitable for the small space in the underground.

[0032] The IMU short section 2 includes an IMU skeleton 21, such as Figure 4As shown, the IMU frame 21 is cylindrical as a whole, and the IMU frame 21 is sequentially provided with an X-axis accelerometer mounting cavity 211, a Y-axis accelerometer mounting cavity 212, a Z-axis accelerometer mounting cavity 213, and an X-axis optical fiber gyro mounting cavity. Cavity 214, Y-axis fiber optic gyr...

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Abstract

The embodiment of the invention discloses a triaxial fiber-optic gyroscope inclinometer. The inclinometer comprises a cylindrical outer pipe, an IMU short section and a data processing circuit short section which are arranged in the outer pipe, and a rotating motor short section arranged at the first end of the outer pipe. The IMU short section comprises an IMU framework. An X-axis fiber-optic gyroscope, a Y-axis fiber-optic gyroscope and a Z-axis fiber-optic gyroscope orthogonal to each other, and an X-axis accelerometer, a Y-axis accelerometer and a Z-axis accelerometerare sequentially arranged on the IMU framework; and modular design of various parts are in detachable connection, and good assembly manufacturability is realized. The triaxial fiber-optic gyroscope inclinometer is based ona strapdown inertial navigation system principle, employs a triaxial fiber-optic gyroscope with small size and high precision, avoids the influence of ferromagnetic substances and overcomes the limitation of wellhead north-seeking and small-size borehole north-seeking in cased well application, is particularly suitable for track measurement and attitude description of horizontal wells and highly-deviated wells, and can achieve full-range full-attitude self-north-seeking and continuous measurement.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of oil exploitation, and in particular to a three-axis fiber optic gyro inclinometer. Background technique [0002] With the continuous improvement of oilfield development, easy-to-exploit oil resources are increasingly exhausted, and the environment and well conditions in oil areas are becoming more and more complex. In order to ensure the quality of oil exploration and production, more accurate and efficient oil well borehole trajectory measurement is required. The oil well fiber optic gyro inclinometer is mainly used to measure the casing well (oil well) borehole trajectory and parameters such as azimuth angle, well inclination angle and tool face angle. [0003] At present, the inclinometers widely used in China mainly adopt fluxgate technology, mechanical gyro technology and fiber optic gyro technology, but all have their own defects and shortcomings, resulting in various drawbacks...

Claims

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Application Information

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IPC IPC(8): E21B47/022
Inventor 杨斌张国芳张传超张艳宇张海华霍华伟鲍杰
Owner BEIJING HUARUI JIUIZHOU ENERGY TECH
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