Downhole Information Acoustic Signal Generation System

Abstract

The invention relates to an underground information acoustic wave signal generating system which comprises an upper connector and an instrument bin protecting cylinder connected with one end of the upper connector. A transducer protecting cylinder, an instrument bin and a detecting instrument standby connecting pipe which are sequentially connected are installed in the instrument bin protecting cylinder. One end of the transducer protecting cylinder is matched with the upper connector. The end, connected with the detecting instrument standby connecting pipe, of the instrument bin is connected with one end of the instrument bin protecting cylinder. A transducer is installed in the transducer protecting cylinder. A transducer driving circuit, a transcoding circuit and an encoding circuit which are sequentially connected are arranged in the instrument bin. Normal drilling is ensured, the aim of converting collected shaft bottom drilling information into sound wave signals to be send is achieved, noise interference resistance is strong, the real-time and accuracy conversion of drilling information can be achieved, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas drilling engineering, and relates to an information transmission system while drilling, in particular to an acoustic signal generation system for downhole information based on acoustic waves. Background technique [0002] According to the current geological conditions and natural environmental conditions encountered in the exploitation of oil and gas resources in the world, the future oil drilling industry will encounter severe challenges of more complex geological conditions and harsher natural environments. Therefore, the downhole process monitoring of oil and gas drilling has put forward higher requirements. requirements. [0003] The high-speed transmission and effective acquisition of downhole information is the key to accurate monitoring of downhole processes and the key technology to achieve fast and high-quality drilling. The downhole information transmission methods tha...

AI Technical Summary

Problems solved by technology

[0004] (1) Wired transmission: Although it can realize fast and large-scale transmission of downhole information, the rotation of the drill string during the drilling process will easily cause the transmission cable to be worn or twisted, affecting normal drilling

[0005] (2) Drilling fluid pulse transmission: The pressure wave of drilling fluid is used as the transmission carrier, which has a strong dependence on drilling fluid, and has disadvantages such as slow transmission rate, susceptibility to downhole noise interference, and inability to realize two-way information transmission.

[0006] (3) Electromagnetic wave transmission: Although it gets rid of the dependence on drilling fluid and can realize two-way transmission of downhole information, it has the disadvantages of dependence on the formation, large attenuation in the formation, poor versatility, and high cost.

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