Electromagnetic measurement while drilling repeater and electromagnetic measurement while drilling system

A measurement-while-drilling and repeater technology, applied in radio transmission systems, measurement, transmission systems, etc., can solve problems such as difficult signal transmission, undecipherable ground, and short circuit of dipole antennas

Active Publication Date: 2021-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the repeater of the electromagnetic measurement while drilling system enters the casing, it is easy to cause a two-pole short circuit of the dipole antenna of the repeater, resulting in the inability to decode the ground and causing great difficulties in signal transmission

Method used

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  • Electromagnetic measurement while drilling repeater and electromagnetic measurement while drilling system
  • Electromagnetic measurement while drilling repeater and electromagnetic measurement while drilling system

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Embodiment Construction

[0022] The present invention is introduced below by accompanying drawing. It should be noted that these descriptions are only provided for explaining the principle of the present invention, and do not limit the scope of the present invention.

[0023] figure 1 A structural cross-sectional view of a repeater 100 for electromagnetic measurement-while-drilling according to the present invention is shown. Such as figure 1 As shown, the repeater 100 includes a body 2 . The body 2 is configured as a substantially cylindrical body, and a wear-resistant band (not shown) is welded on the outer peripheral surface 21 of the body 2 . Both ends of the body 2 are respectively provided with a negative tapered buckle 10-1 and a positive tapered buckle 10-2. Thus, the body 2 can be mounted as an integral pup joint to a drill pipe (not shown) via the joint 1 . This type of connection is well known in the art and will not be described in detail here.

[0024] According to the present inven...

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Abstract

The invention provides an electromagnetic measurement-while-drilling repeater, and the repeater comprises a cylindrical body which is used as one pole of a dipole antenna, and the two ends of the bodyare respectively provided with a positive cone-shaped connecting buckle and a negative cone-shaped connecting buckle; The joint is connected to the regular cone-shaped connecting buckle of the body;And the step part is formed on the peripheral surface of the body, the free end of the step part is smoothly connected with the regular cone-shaped connecting buckle, and the bottom surface of the step part is radially sunken relative to the peripheral surface of the body. Wherein an antenna, which is the other pole of the dipole antenna, is arranged on the step part. The invention also provides an electromagnetic measurement while drilling system comprising the repeater.

Description

technical field [0001] The invention relates to the field of oil drilling downhole information transmission, and more particularly relates to an electromagnetic measurement-while-drilling repeater. The invention also relates to an electromagnetic measurement-while-drilling system including the electromagnetic measurement-while-drilling repeater. Background technique [0002] At present, measurement-while-drilling systems at home and abroad generally use drilling fluid pulse measurement-while-drilling to upload downhole measurement data, which has played an important role in drilling engineering. However, when working in drilling fluid with gas or plugging materials, the signal sent to the ground by drilling fluid pulse measurement while drilling is very weak, and even cannot work normally. [0003] For this reason, electromagnetic measurement-while-drilling technology has been developed in the prior art. Electromagnetic measurement-while-drilling instruments have the chara...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/155H04Q1/08E21B47/12
Inventor 郑俊华杨春国陈晓晖宋朝晖胡越发王立双高炳堂张仁龙王磊
Owner CHINA PETROLEUM & CHEM CORP
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