An electromagnetic centralizing device in a well

An electromagnetic and centralizing head technology, which is applied in wellbore/well parts, earthwork drilling and production, etc., can solve the problems of increasing the manufacturing cost of the centralizer and the influence of the scalability of the centralizer, and achieves the effect of flexible design and simple operation

Active Publication Date: 2017-01-04
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the centralizer usually adopts a mechanical structure, which makes the flexibility of the centralizer of the mechanical structure affected due to long-term use, and at the same time, the motor control will also increase the manufacturing cost of the centralizer

Method used

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  • An electromagnetic centralizing device in a well
  • An electromagnetic centralizing device in a well
  • An electromagnetic centralizing device in a well

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Embodiment Construction

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. For this reason, the embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0021] According to the problems in the prior art, the inventor considers that the centralizing device with electromagnetic drive can be used to overcome the decrease in the flexibility of the centralizing device caused by the long-term use of the traditional mechanical structure of the centralizing device, and at the same time, the increase due to motor control The problem of instrument manufacturing cost.

[0022] The technical solution of the present invention is to provide an electromagnetic centralizing device in a well, comprising:

[0023] A magnetic column 1...

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PUM

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Abstract

The invention provides an electromagnetic centralizing device in a well, comprising: a magnetic column, in which a magnetized coil is placed along the circumferential direction, and the magnetized coil is used to generate a magnetic field when electrified; The head is fan-shaped and evenly surrounds the magnetic column. The inner arc side of the centralizing head is magnetic. At the same time, its bottom surface is welded to the centralizing pillar; the centralizing plate is located at the lower end of the centralizing plate, and multiple centralizing chutes are evenly distributed radially on the centralizing plate. , so that the centralizing pillar can slide radially in the centralizing chute. Through the electromagnetic centralizing device provided by the present invention, the purpose of centralizing the resistivity tester can be achieved by controlling the expansion and contraction of the centralizing sheet with electromagnetic, and no additional control circuit is needed, and the design is flexible and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of oil and gas resources and environment development, and in particular relates to an electromagnetic righting device for a resistivity logging instrument of an oil field production well. Background technique [0002] In the process of oil exploitation in my country, at present, resistivity logging tools must be used in oil wells to measure the resistivity of rocks and ores in drilling holes. Therefore, the eccentricity of the resistivity logging tool itself will have a great negative impact on the logging results, so it must be used Centralizer. [0003] In the prior art, the centralizer usually adopts a mechanical structure, which affects the stretchability of the centralizer with the mechanical structure due to long-term use, and at the same time, the motor control will also increase the manufacturing cost of the centralizer. [0004] Therefore, how to not only ensure the function of the centralizer, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
Inventor 刘合李益良党瑞荣任志平李涛陈强毕秀玲韩伟业孙强明尔扬黄守志
Owner PETROCHINA CO LTD
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