A fiber optic gyro imu assembly for petroleum inclinometers

Abstract

The invention discloses a fiber-optic gyroscope inertial measurement unit (IMU) assembly used for a petroleum clinometer. The IMU assembly is characterized in that a fiber-optic gyroscope inertial measurement unit (IMU) assembly used for petroleum clinometer cylinder outer sleeve, a fiber-optic gyroscope sensitive ring module, a data processing circuit module, a light source assembly module and an accelerometer module are arranged on an IMU framework. The IMU framework is of a cylinder and framework combined structural layout in space. All modules forming the fiber-optic gyroscope IMU assembly are fixedly arranged through mounting bosses on the IMU framework, so that the path area of internal heat conduction among the modules is minimum, and by combining the spatial crossed layout of all the internal modules and the heat balance action of the external magnetic shielding sleeve, the internal heat nonuniformity of the IMU assembly is effectively reduced. The fiber-optic gyroscope IMU assembly has a reference transfer structure, and the derivation of an IMU reference for installation can be realized. When being used for the petroleum clinometer, the fiber-optic gyroscope IMU assembly disclosed by the invention is high in environmental suitability and measurement accuracy.

Description

technical field [0001] The invention relates to an optical fiber gyroscope IMU assembly used for a petroleum inclinometer, which uses a skeleton to determine the coordinate relationship of the parts required by the petroleum inclinometer installed thereon. Background technique [0002] The inclinometer is the main measurement tool for the wellbore trajectory of the oil well. The traditional inclinometer mainly uses a mechanical gyroscope as an angular velocity sensor to measure the well inclination and azimuth, and an accelerometer (that is, a meter component) to collect information about the relative inertial space. With the advancement of technology, the development and application of fiber optic gyro petroleum inclinometers are becoming more and more extensive. The fiber optic gyro technology is applied in the field of petroleum inclinometers, and the key problems to be solved are: [0003] (1) Size restrictions. The inclinometer is usually a cylindrical structure. The ...

AI Technical Summary

Problems solved by technology

[0004] (2) Complex strong magnetic field application environment

[0007] The main problems of the IMU assembly of the fiber optic gyro petroleum inclinometer that has been developed at present are: (1) Modular design cannot be realized, the structure is complicated, and the assembly process is poor

(2) Effective internal thermal balance cannot be achieved, and the temperature performance is poor

(3) The magnetic shielding effect is not good, or the structure of the magnetic shielding is complicated, and it is difficult to process and assemble

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