Locking-type downhole sound wave signal ground receiving and displaying system

Abstract

The invention provides a locking-type downhole sound wave signal ground receiving and displaying system, and belongs to the field of petroleum and natural gas drilling engineering. On the premise that drilling fluid is circulated normally, the external dimension of a drilling column and the structure of an internal flow passage are not changed, real-time precise detection and identification and fast decoding and displaying on sound signals in a drill column information channel can be achieved. The locking-type downhole sound wave signal ground receiving and displaying system comprises a sound wave signal receiving and converting device arranged on the surface of the drill column at a well mouth and a wireless signal receiving and displaying device arranged on the surface of a drill platform; the sound wave signal receiving and converting device is arranged outside a drill fluid flow passage, and comprises a signal decoding circuit, a signal converting circuit, and a wireless signal emitting circuit, the signal decoding circuit, the signal converting circuit and the wireless signal emitting circuit are connected in sequence, and sound wave signal receiving and converting device further comprises a sound signal receiving element which is connected to the signal decoding circuit.

Description

technical field [0001] The invention relates to the field of oil and natural gas drilling engineering, and relates to a drilling-while-drilling information transmission system, in particular to a locking type underground acoustic signal ground receiving and displaying system. 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 that have been ...

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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