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Underground full-well wireless transmission method

A technology of wireless transmission and downhole measurement, applied in construction and other directions, can solve the problems of complex structure and principle, achieve compact structure, overcome the inability to read data in real time, and improve transmission accuracy

Inactive Publication Date: 2019-05-21
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although such a technical solution realizes the wireless transmission of the whole well, it uses sound wave transmission, and its realization structure and principle are relatively complicated.

Method used

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  • Underground full-well wireless transmission method

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Embodiment Construction

[0031] As the best implementation mode of the present invention, it discloses a downhole whole-well wireless transmission method, which includes the steps of transmitting downhole measurement data to the surface signal receiving and sending device and the step of the ground signal receiving and sending device sending control instructions to downhole instruments;

[0032] In the step of transmitting the downhole measurement data to the ground computer, the downhole wireless transmitter sends the detected downhole data to the downhole wireless transmitter, and the downhole wireless transmitter measurement data is encoded into an electromagnetic wave signal and sent to the ground or a wireless repeater, such as If the distance is too long, the signal cannot be received on the ground, and the wireless repeater is used to propagate to the ground signal receiving and sending device, and the ground signal receiving and sending device detects the signal and decodes it into measurement d...

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Abstract

The invention discloses an underground full-well wireless transmission method. The method comprises the steps of transmitting underground measurement data to a ground signal receiving and sending device, and sending a control instruction to an underground instrument by the ground signal receiving and sending device, wherein in the step of transmitting underground measurement data to a ground computer, an underground wireless transmitter is used for transmitting detected underground data to an underground wireless transmitter; the underground wireless transmitter is used for encoding measurement data into electromagnetic wave signals and transmitting the electromagnetic wave signals to the ground or a wireless relay, if the distance is too long, the ground cannot receive the signals, the signals are transmitted to the ground signal receiving and sending device through the wireless relay, and the ground signal receiving and sending device is used for detecting the signals and decoding the signals into measurement data. The method can be used for stratum testing operation, the single-stage transmission distance is far larger than the currently adopted sound wave transmission distanceand the currently adopted short-distance wireless transmission distance, and the technical current situation of ground and underground bidirectional wireless transmission is fundamentally changed.

Description

technical field [0001] The invention relates to the technical field of oil and gas well testing operations, in particular to a downhole whole well wireless transmission method. Background technique [0002] In the oil testing operation, the storage type electronic pressure gauge is generally used to test the bottom hole pressure and temperature data. This method needs to lower the pressure gauge to the bottom of the well with the test string before the test, and release the pressure after the test is over. The data of downhole pressure and temperature are obtained through the meter, and combined with the construction process, the well test analysis and interpretation are carried out. Since this method cannot monitor the bottom hole pressure and temperature changes in real time, the real situation at the bottom of the well cannot be fed back to the surface in time during the construction process. Therefore, it is difficult to properly determine the shut-in time during the oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/13
Inventor 庞东晓潘登贺秋云韩雄温杰文廖刚刘兴华张国洪陈光智谢奎
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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