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Downhole single-core bus circuit device while drilling

A bus circuit and single-core technology, applied in drilling/well systems, systems using coupling circuits, electrical components, etc., can solve problems such as weak anti-interference ability, poor bus load capacity, and high power consumption. Achieve the effects of reducing impact, increasing transmission distance, and improving quality

Active Publication Date: 2020-01-10
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a single-core bus circuit device while drilling, which aims to solve the problems of high power consumption, poor bus load capacity, and weak anti-interference ability of the existing downhole measurement system while drilling. The problem

Method used

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  • Downhole single-core bus circuit device while drilling
  • Downhole single-core bus circuit device while drilling
  • Downhole single-core bus circuit device while drilling

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Embodiment Construction

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same 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.

[0039] Such as Figure 1~2 As shown, a downhole single-core bus circuit device provided by an embodiment of the present invention includes: a central control unit, an instrument terminal unit, and a single-core bus;

[0040] The instrument terminal unit is used to forward the measured formation parameters, and convert the formation parameters into formation parameter information and send it to the central control unit;

[0041] The central control unit is used to forward the formation parameter information and send a central con...

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Abstract

The invention belongs to the technical field of downhole communication of oil and gas exploration and drilling systems, and particularly discloses a downhole single-core bus circuit device while drilling. The downhole single-core bus circuit device comprises a central control unit, an instrument terminal unit and a single-core bus; the instrument terminal unit is used for forwarding measurement formation parameters and converting the formation parameters into formation parameter information and sending the formation parameter information to the central control unit; the central control unit isused for forwarding the formation parameter information and sending a central control command to the instrument terminal unit; the single-core bus is electrically connected with the central control unit and the instrument terminal unit correspondingly, and data exchange between the central control unit and the instrument terminal unit is realized; and a terminal resistor is arranged on the single-core bus, and the resistance value of the terminal resistor is the characteristic impedance of the single-core bus. The anti-interference capability of the line and the transmission quality of the line are improved.

Description

technical field [0001] The invention relates to the technical field of downhole communication of an oil and gas exploration while drilling system, in particular to a downhole single-core bus circuit device while drilling. Background technique [0002] In the fields of geological exploration and oil field development, well logging technology is usually used, which uses various instruments to measure the physical parameters of the formation and conduct geological and other aspects of research. [0003] In order to obtain the formation parameters closest to the original state, most of the current LWD is used, and the LWD instrument is placed near the drill bit, and the formation parameters obtained are the formation parameters just drilled, which are closest to the original state of the formation; The formation petrophysical parameters measured during the drilling process are sent to the ground in real time for processing by the data telemetry system. [0004] Due to the harsh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/12
CPCE21B47/12G01V11/002G08C19/04H04B3/546H04B3/56H04B2203/5475H04B2203/5483
Inventor 真齐辉陈文轩底青云
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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