Electromagnetic wave transmission near-bit geosteering system
A geosteering, electromagnetic wave technology, applied in earthwork drilling, surveying, wellbore/well components, etc., can solve problems such as high cost and trouble, and achieve the effect of reducing the time for instrument connection
Pending Publication Date: 2020-08-18
山东万洋石油科技有限公司
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Problems solved by technology
Because in the rotary steerable drilling system, the near-bit sensor used for data acquisition is separated from the MWD system by the driven drilling tool, and it is troublesome to connect the two with cables, and the cost is very high
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[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0019] Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0020] see figure 1 The present invention provides a technical solution: an electromagnetic wave transmission near-drill geosteering system, including a ground system 1, a motor 2, a probe 3, a receiving sub 4, a continuous wave pulse generator 5, a measuring sub 6 and a gro...
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The invention discloses an electromagnetic wave transmission near-bit geosteering system, and relates to near-bit geosteering systems. The electromagnetic wave transmission near-bit geosteering systemcomprises a ground system, a motor, a probe pipe, a receiving short section, a continuous wave pulse generator, a measuring short section and a ground receiver, the output end of the ground system iselectrically connected with the output end of the motor, the probe pipe is fixedly connected to the output end of the motor, the measuring short section is fixedly installed at the bottom of the inner wall of the probe pipe, the receiving short section is fixedly installed at the top of the inner wall of the probe pipe, and the output end of the receiving short section is electrically connected with the input end of the continuous wave pulse generator. According to the electromagnetic wave transmission near-bit geosteering system, a wireless short transmission system based on electromagneticcoupling is adopted, information collected by a near-bit sensor is transmitted to the ground system by the system, and under the downhole environments of a deep well, a complex well and the like, thewireless signal transmission is achieved by an electromagnetic technology.
Description
technical field [0001] The invention relates to the technical field of geosteering systems near a drill bit, in particular to a geosteering system near a drill bit for electromagnetic wave transmission. Background technique [0002] With the development of measurement-while-drilling and logging-while-drilling technologies, more sensors for data acquisition are installed near the drill bit, so that downhole acquisition information can be obtained more timely and accurately. But it also creates a problem, how to transmit the data to the ground. Because in the rotary steerable drilling system, the near-drill sensor used for data acquisition is separated from the MWD system by the driven drilling tool, and it is troublesome to connect the two with cables, and the cost is very high. Contents of the invention [0003] The invention provides a geosteering system near a drill bit for electromagnetic wave transmission, which uses electromagnetic technology to realize wireless sign...
Claims
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IPC IPC(8): E21B47/13E21B47/18E21B47/00E21B47/022E21B49/00E21B47/06
CPCE21B47/00E21B47/022E21B47/06E21B47/18E21B49/00
Inventor 王德庆王娟薛慧霞王庆中陈作玉李馨婷刘佳琦
Owner 山东万洋石油科技有限公司