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Full optical fiber digital inclinometer

An all-fiber and inclinometer technology, which is applied in measurement, wellbore/well components, earthwork drilling and production, etc. It can solve the problems of limiting the uploading capability of downhole measurement signals, limited bandwidth of transmission cables, and inability to transmit formation information.

Inactive Publication Date: 2007-03-21
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the armored seven-core cable of the 1950s is currently used in the logging field as the data transmission of wired logging. Although different logging methods have realized the automation of the logging process and the real-time processing of logging data, due to the The limited bandwidth seriously limits the uploading capability of downhole measurement signals, and a large amount of formation information cannot be transmitted or cannot be transmitted to the ground. According to preliminary statistics, only 30-50% of the information of electrical logging can be used, while acoustic logging and Only 10% of the radioactive logging information is used

Method used

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  • Full optical fiber digital inclinometer
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Embodiment Construction

[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] The present invention is an all-fiber digital inclinometer, which is composed of a central processor 1, a signal processor 2, a counter 3, an optical cable winch 4, a tension sensor 5, a derrick 6, an optical cable 8 and a downhole probe 10. The central processor 1 It is connected with the signal processor 2 through the RS232 interface, the optical cable winch 4 is connected with the signal processor 2 through the cable 11, the counter 3 is installed on the optical cable winch 4, the optical cable 8 is wound on the optical cable winch 4, and the derrick 6 is placed at the head of the measured well 7, a tension sensor 5 is installed on the derrick 6, and one end of the optical cable 8 is connected to one end of the downhole probe 10 through the tension sensor 5.

[0056] CPU 1

[0057] Referring to Fig. 2, the control flow of the central processor 1 of...

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Abstract

The present invention discloses an all-fibre digital clinometer. It is composed of central processor, signal processor, counter, optical cable capstan winch, tension sensor, derrick and letting-in probe. Said invention also provides their connection mode, and also provides the working principle of said all-fiber digital clinometer and its operation method.

Description

technical field [0001] The invention relates to an all-fiber digital inclinometer which can be used for continuous measurement of borehole trajectories of underground oil and natural gas wells. Background technique [0002] Inclinometers are widely used measurement tools for borehole trajectory measurement in oil and gas wells and coal mines. At present, the inclinometer used at home and abroad mainly uses a fluxgate sensor or a mechanical gyroscope as an angular velocity sensor combined with an accelerometer to measure the azimuth and inclination angle of the borehole. The fluxgate inclinometer has the advantages of simple structure, low price and stable performance, but the instrument cannot realize the measurement of oil wells with magnetic interference such as cased wells; the mechanical gyro inclinometer can make up for this shortcoming, but the mechanical gyro The internal inherent rotation mechanism makes it have defects such as complex structure, easy damage, poor v...

Claims

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Application Information

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IPC IPC(8): E21B47/02
Inventor 张春熹高爽颜廷洋李晨王夏霄朱奎宝李敏陈永奇马宗峰
Owner BEIHANG UNIV
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