Wireless inclinometer while drilling

A wireless while drilling and inclinometer technology, which is applied in the directions of measurement, earthwork drilling and production, wellbore/well components, etc. It can solve the problems of limited application range, magnetic interference, and susceptibility to the influence of the surrounding magnetic field, so as to broaden the scope of application , to meet the measurement accuracy requirements, to eliminate the effect of noise interference

Inactive Publication Date: 2012-05-02
XIAN SITAN INSTR
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Problems solved by technology

The sensor performance of this measurement method is stable and reliable, but it is easily affected by the surrounding magnetic field. It is required that the debugging environment should be free of ferromagnetic substances within 3 meters and no strong magnetic field within 10 meters. It can only be used for the measurement of open hole wells, and its application range is limited to a certain extent.
In some drilling processes, due to the close distance between the drilled wellbore and the adjacent well, magnetic interference often occurs, making the fluxgate sensor unable to work normally

Method used

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Embodiment Construction

[0020] The working principle of the present invention is: the wireless inclinometer while drilling provided by the present invention is that the inclinometer while drilling uses a gyroscope and a fluxgate for orientation. The working mode of the inclinometer while drilling is controlled by sending a control signal from the uphole to the downhole instrument signal receiving device. The first working method is to use the gyroscope and the fluxgate for orientation at the same time, and compare the data sent by the two to ensure the measurement accuracy of the magnetic anomaly area. The second working method is to use the fluxgate for orientation, that is, use the fluxgate for orientation in the non-magnetic anomaly area, which reduces power consumption and prolongs the life of the gyroscope.

[0021] The invention can not only use the gyroscope and the magnetic fluxgate for orientation at the same time, but also use the magnetic fluxgate alone for orientation. The working mode o...

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Abstract

The invention relates to a wireless inclinometer while drilling, which comprises a measuring nipple skeleton. The wireless inclinometer while drilling additionally comprises a gyroscope set which is arranged on the measuring nipple skeleton. The invention provides the wireless inclinometer while drilling which has the advantages that the measurement accuracy is high, the noise interference and the random drift of gyroscopes can be eliminated and the application scope of the instrument can be widened.

Description

technical field [0001] The invention belongs to the field of petroleum exploration instruments and equipment, and relates to a wireless inclinometer while drilling, in particular to a wireless inclinometer while drilling for measuring wellbore trajectory during directional drilling. Background technique [0002] In the process of directional drilling in the petroleum industry, fluxgate inclinometers are often used for construction. This type of inclinometer while drilling uses the Cartesian coordinate system composed of the vertical line of the wellhead and the geomagnetic field as the reference to define the directional parameters, and uses the relationship between the probe coordinate system and the reference coordinate system to measure the directional parameters. There are two types of inclinometers while drilling: wired and wireless. [0003] The existing wireless inclinometer while drilling uses the fluxgate sensor as the orientation sensor, and converts the geographi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/022
Inventor 李晓东张亚军孙国鼎刘立扬程亮
Owner XIAN SITAN INSTR
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