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Device and method for rotating and directional inclination measuring in a small-aperture single-gyro horizontal well

A technology of rotary orientation and inclination measuring device, which is applied in the direction of surveying, earthwork drilling, borehole/well components, etc., which can solve the problems of difficult measurement of small-diameter horizontal wells, low device cost, and high measurement accuracy, so as to improve the accuracy of information extraction , reduce the influence of error, reduce the effect of drift and noise on the accuracy

Active Publication Date: 2020-02-07
CHONGQING UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] In view of the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to propose a small-aperture single-gyro horizontal well rotary directional inclination measuring device and method. Low installation cost

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  • Device and method for rotating and directional inclination measuring in a small-aperture single-gyro horizontal well
  • Device and method for rotating and directional inclination measuring in a small-aperture single-gyro horizontal well
  • Device and method for rotating and directional inclination measuring in a small-aperture single-gyro horizontal well

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Embodiment Construction

[0038] The composition block diagram of the system of the present invention is shown in figure 1 , including two mechanical fixtures, one of which is provided with a base whose surface flatness meets the installation requirements, and a DC motor is rigidly connected to the base, and the DC motor adopts a servo motor; the output shaft of the DC motor is in a horizontal state, and the DC motor There is a turntable at the end of the output shaft, the axis of the turntable coincides with the output shaft of the motor, and the coordinate system of the turntable is OXYZ, corresponding to the upper right; the single-axis small-diameter fiber optic gyroscope and the dual-axis MEMS accelerometer assembly are rigidly installed on the turntable, and the fiber optic gyroscope The sensitive axis is the X axis, and the sensitive axes of the dual-axis MEMS accelerometer are the X axis and the Y axis respectively, see figure 2 , the turntable rotates around the Y axis driven by the output sh...

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Abstract

The invention discloses rotation orientation inclinometering device and method for a small-born single gyro horizontal well. A base seat of an inclinometering device is connected with a DC motor; an end part of an output shaft of the DC motor is provided with a rotary table; an optical gyro and a double-shaft accelerometer assembly are mounted on the rotary table; a sensitive axis of the optical gyro is an X-axis; sensitive axes of the double-shaft accelerometer assembly are an X-axis and a Y-axis; the inclinometering device further comprises a rotating speed sensor measuring rotating speed of the output shaft of the motor; an ARM micro-processor and a motor driving module are fixed on the other machinery fixing member; the ARM micro-processor mainly collect signals of the gyro and the accelerometer in real time, gives out a control signal of the motor and resolves according to an orientation inclinometering algorithm as well as extracts north orientation angle information; an output of the rotating speed sensor is connected with the ARM micro-processor; the ARM micro-processor transmits the calculated rotating speed information to a motor driving module to control the DC motor to rotate at uniform speed. A problem of difficulty of small-born horizontal well measurement can be solved; and the rotation orientation inclinometering device has great measuring precision and low cost.

Description

technical field [0001] The invention relates to directional technology in drilling, in particular to a small-aperture single gyroscope horizontal well rotary directional inclination measuring device and method, belonging to the technical fields of geodetic surveying and oil-gas well surveying. Background technique [0002] Modern society consumes a lot of energy. With the sharp reduction of non-renewable resources such as petroleum and coal, the drilling technology of horizontal wells and slimhole wells has been continuously developed and improved. At present, the directional inclinometers used in geological exploration and oil and gas well measurement mainly include: magnetic measurement method, photographic measurement method, inertial measurement method, etc. The magnetic sensing measurement system has the characteristics of small size, impact resistance, high temperature resistance, and low cost, but it cannot obtain effective trajectory parameters in non-magnetic enviro...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/022
CPCE21B47/022
Inventor 任春华胡晓明周枚林
Owner CHONGQING UNIV
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