Downhole-to-ground logging communication and control device and method

A control device, ground technology, applied in the direction of buildings, etc., can solve problems such as interference with generators, insufficient generator power, limited transmission rate, etc.

Pending Publication Date: 2021-07-06
GUOYI PETROLEUM TECH (WUXI) CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The working method of mud pulse is to encode the mud pressure signal in the wellbore during drilling, and realize the information transmission by collecting the change of mud pressure signal. The transmission rate of this method is very limited, generally several bps, and with the increase of well depth increasing, the instability of the mud signal continues to increase, and the difficulty of decoding also increases rapidly
In addition, mud is still the only way to drive the downhole generator, and pressure encoding of the mud signal will interfere with the work of the generator to a certain extent, resulting in insufficient power of the generator and reducing the overall working efficiency

Method used

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  • Downhole-to-ground logging communication and control device and method
  • Downhole-to-ground logging communication and control device and method

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Embodiment Construction

[0019] A surface-to-downhole quantum logging communication and control device, see figure 1 : it comprises surface part 10 and downhole part 20, and surface part 10 is provided with atomic magnetometer receiving device 1 and the quantum detection equipment 2 of quantum data readout, and downhole part 20 comprises electromagnetic wave emission system 3, and electromagnetic wave emission system 3 is used for Signals detected downhole are encoded and transmitted via electromagnetic waves.

[0020] The atomic magnetometer receiving device 1 is connected with the quantum detection device 2 for quantum data readout through a cable to ensure the accuracy and reliability of the final decoding of the data;

[0021] Atomic magnetometer receiving device 1 adopts high sensitivity 87 Rb atomic magnetometer or diamond quantum magnetometer, its transmission channel covers 0-100Hz, and its detected magnetic field strength is as low as 10 -12 T level, noise floor as low as 1PT / Hz 1 / 2 , with...

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Abstract

The invention provides a downhole-to-ground logging communication and control device. The device has the advantages of being high in detection sensitivity, wide in working temperature range, low in working energy consumption, small in occupied size, large in channel width, high in transmission rate and low in price, and has obvious advantages in the aspect of wireless transmission of downhole-to-ground data communication. The device comprises a ground part and an underground part; the ground part is provided with an atomic magnetometer receiving device and quantum detection equipment for reading out quantum data; the underground part comprises an electromagnetic wave emission system; and the electromagnetic wave emission system is used for encoding signals detected underground and emitting the signals through electromagnetic waves.

Description

technical field [0001] The invention relates to the technical field of quantum well logging, in particular to a well logging communication and control device from downhole to surface. The invention also provides a method for well logging communication and control from downhole to surface. Background technique [0002] The transmission of downhole data to the surface in the existing logging technology is carried out through mud pulse or EM-MWD. The working method of mud pulse is to encode the mud pressure signal in the wellbore during drilling, and realize the information transmission by collecting the change of mud pressure signal. The transmission rate of this method is very limited, generally several bps, and with the increase of well depth As the value increases, the instability of the mud signal continues to increase, and the difficulty of decoding also increases rapidly. In addition, mud is the only way to drive the downhole generator, and pressure encoding of the mud ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/13
CPCE21B47/13
Inventor 孙哲冯泽东贺羽
Owner GUOYI PETROLEUM TECH (WUXI) CO LTD
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