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Data transmission system and method for transmitting underground measurement-while-drilling data to ground

A data transmission system and downhole measurement technology, which is applied in measurement, earthwork drilling, borehole/well components, etc., can solve problems such as fast attenuation, difficulty in detecting signals, and slow transmission speed, so as to improve data transmission rate and communication reliability sexual effect

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The disadvantage is that the attenuation is too fast, and it is greatly affected by the environment. The low-intensity signal generated by the borehole and the interference of sound waves and electromagnetic waves generated by drilling equipment make it very difficult to detect signals and the transmission speed is slow.

Method used

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  • Data transmission system and method for transmitting underground measurement-while-drilling data to ground
  • Data transmission system and method for transmitting underground measurement-while-drilling data to ground
  • Data transmission system and method for transmitting underground measurement-while-drilling data to ground

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be noted that the directional terms mentioned in the present invention, such as: up and down, are only the directions of the drawings. Therefore, the directions used are only used to better illustrate the present invention, but not to limit the protection scope of the present invention.

[0039] figure 1 It is a schematic diagram of a data transmission system for transmitting downhole measurement data to the surface according to an embodiment of the present invention.

[0040] like figure 1 As shown, the data transmission system includes: a drill string 40 connected to the drilling derrick 20 on the ground, on which a logging-while-drilling measurement tool 65 is installed; A micro memory 43 is accommodated. Wherein, the drill string 40 includes a long...

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Abstract

The invention discloses a data transmission system and method for transmitting underground measurement-while-drilling data to the ground. The data transmission system comprises a drill stem equipped with a well-logging-measurement-while-drilling tool, and a throwing-while-drilling pup joint accommodating a microstorage, wherein the throwing-while-drilling pup joint comprises a housing, a control circuit and a wireless transmit-receive device; the drill stem is sleeved with the housing, and a clearance space is formed between the drill stem and the housing; and under the action of a microstorage release command sent by the control circuit, the throwing-while-drilling pup joint releases the microstorage loaded with the underground measurement data to the ground. The data transmission system for transmitting the underground measurement-while-drilling data to the ground greatly improves the data transmission rate and the communication reliability; and as only slurry is used as a transmission medium of the microstorage, extra cost is not needed, and the normal drilling process is not influenced.

Description

technical field [0001] The invention relates to the field of oil and gas development and exploration, in particular to a data transmission system and method for transmitting downhole measurement data while drilling to the ground. Background technique [0002] With the rapid growth of offshore drilling and the continuous development of horizontal well technology, the application of logging while drilling technology is becoming more and more extensive. The main difference from conventional wireline logging lies in the real-time data acquisition of logging while drilling. That is, formation data are obtained with little or no drilling fluid invasion, and thus are closer to undisturbed formations. Since the test of the formation data is completed while drilling and transmitted to the surface for on-site analysis and interpretation, it not only saves the drilling cycle, but also can guide the drilling, adjust the drilling trajectory and improve the drilling process. Therefore, h...

Claims

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Application Information

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IPC IPC(8): E21B47/12E21B47/26
Inventor 李继博倪卫宁张卫陆黄生李三国李新
Owner CHINA PETROLEUM & CHEM CORP
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