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Electromagnetic wave signal transmission method and system of measurement while drilling

A technology of electromagnetic wave signal and measurement while drilling, which can be used in measurement, earthwork drilling, wellbore/well components, etc. It can solve problems such as signal attenuation and achieve the effect of increasing depth

Inactive Publication Date: 2011-11-23
刘学经
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Problems solved by technology

[0003] Therefore, the purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method and system for transmitting electromagnetic wave signals for measurement while drilling, which is used to solve the problem of signal attenuation caused by formation reasons in the electromagnetic wave transmission signals in the prior art

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  • Electromagnetic wave signal transmission method and system of measurement while drilling
  • Electromagnetic wave signal transmission method and system of measurement while drilling
  • Electromagnetic wave signal transmission method and system of measurement while drilling

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[0028] 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. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] Such as figure 1 Shown is a flow chart of a transmission method for measuring-while-drilling electromagnetic wave signals according to an embodiment of the present invention.

[0030] Including step 101, a signal detector is placed in a test well with a certain depth within a certain range around the main well, and is used to receive a measurement signal in the form of electromagnetic waves emitted by the electromagnetic wave transmitter of the detection ins...

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Abstract

The invention relates to the technical field of measurement while drilling, in particular to an electromagnetic wave signal transmission method and an electromagnetic wave signal transmission system of measurement while drilling. The method comprises the following steps of: putting a signal detector into a test well with certain depth in a certain range of the periphery of a main well, wherein the signal detector is used for receiving measurement signals of electromagnetic wave form emitted by an electromagnetic wave emitter of a detection instrument in the main well in the test well; and calculating measurement data through a ground receiver by using the simultaneously received measurement signals from the detection instrument in the main well and measurement signals obtained by the signal detector. Because the distance of transmitting the signals through a stratum is shortened and then attenuation of the signals is reduced, the construction depth of an electromagnetic wave measurement system is increased.

Description

technical field [0001] The invention relates to the technical field of measurement-while-drilling, in particular to an electromagnetic wave signal transmission method and system for measurement-while-drilling. Background technique [0002] There are many methods for uploading downhole telemetry data of oil drilling measurement while drilling. At present, electromagnetic wave transmission is a kind of wireless transmission method widely used in engineering. The system uses the difference between the voltage signal transmitted by the metal drill pipe and the voltage signal received by the ground to obtain telemetry data. In this method, the detection instrument is built into the non-magnetic drill collar of the drill bit, and the detection data is transmitted through the metal drill pipe The voltage signal is transmitted to the receiving device on the surface derrick. In addition, an electromagnetic signal transmitter is added to the detection instrument to convert the teleme...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/12E21B49/00
Inventor 刘新元
Owner 刘学经
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