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Two-way full-duplex high-speed downhole optical transmission system

An optical transmission, full-duplex technology, applied in the direction of optical fiber transmission, etc., can solve the problems of low transmission rate, small transmission length, and inability to meet the needs of well logging and downhole information collection, and achieve the effect of large transmission length and high transmission rate

Active Publication Date: 2016-01-20
盘锦纵横声光电子技术有限责任公司
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AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of the existing downhole transmission system, such as low downhole transmission rate and small transmission length, which cannot meet the needs of downhole information collection for well logging

Method used

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  • Two-way full-duplex high-speed downhole optical transmission system
  • Two-way full-duplex high-speed downhole optical transmission system
  • Two-way full-duplex high-speed downhole optical transmission system

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Embodiment Construction

[0012] Such as figure 1 , figure 2 , image 3 , Figure 4 As shown, a two-way full-duplex high-speed downhole optical transmission system includes a logging bridle 2, a logging winch photoelectric integrated slip ring 4, an optical fiber logging cable 5, a numerically controlled logging system 6, and a downhole logging instrument combination 7; The numerical control logging system 6 is connected with the downhole optical transmission nipple 1 through the optical fiber logging cable 5, the optical fiber logging cable 5 adopts 1 to 5 optical fibers, the downhole optical transmission nipple 1, the logging bridle 2, and the downhole data acquisition and processing The sub-section 3 and the downhole logging tool combination 7 are connected sequentially. The downhole optical transmission sub-section 1 can reach 1.25Gbps when using a single cable for transmission, and supports up to 128 channels of analog / digital models. It can be extended to the highest speed if necessary. 1.25G...

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Abstract

The invention relates to the technical field of oil well logging, and particularly relates to a two-way full-duplex high-speed downhole optical transmission system. A digital control logging system of the system is connected with a downhole optical transmission short section through an optical fibre logging cable; the optical fibre logging cable adopts 1-5 optical fibers; the downhole optical transmission short section, a logging headstall, a downhole data collection processing short section and a downhole logging instrument combination are orderly connected; the speed of the downhole optical transmission short section can be up to 1.25Gbps when a single cable is adopted to transmit, and 128-path analogue / digital models are supported at most; an optical fiber connector is made on a multi-core optical fiber and is connected with a laser emission terminal of a downhole electric / optical conversion circuit assembly; the multi-core optical fiber and the downhole electric / optical conversion circuit assembly form two-way communication, and the tail part of the downhole optical transmission short section is connected with an optical fiber protection steel tube airtight detection valve. According the invention, high downhole transmission speed and large transmission length are achieved, and the defects of low downhole transmission speed and small transmission length in the existing downhole transmission system are overcome.

Description

Technical field: [0001] The invention relates to the technical field of petroleum well logging, in particular to a two-way full-duplex high-speed downhole optical transmission system. Background technique: [0002] At present, domestic and foreign well logging uses 7-core double-layer steel wire armored load-bearing logging cables as the main means of collecting and transmitting downhole logging information. Due to the constraints of cable resistance, capacitance, inductance, electromagnetic interference and length, the highest downhole logging The transmission rate can reach 1Mbps, and the longest transmission length can reach 8000 meters, but this transmission rate cannot meet the requirements of large amount of information collected underground. Therefore, the current downhole transmission system of well logging cables at home and abroad can no longer meet the development and progress of well logging downhole acquisition system, which greatly restricts the development of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/25
Inventor 徐凌堂肇徐涛
Owner 盘锦纵横声光电子技术有限责任公司
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