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Crawler

A technology of crawler and controller, applied in the field of oil and gas exploration, can solve the problems of unevenness, diameter change of wellbore, running without logging instrument, etc.

Active Publication Date: 2020-10-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the logging and post-production testing of horizontal wells is still a difficult problem in the development of horizontal wells. One of the main difficulties is how to lower the logging instrument to the toe position of the horizontal section.
[0003] There may be variable diameter, unevenness, etc. in the wellbore of a horizontal well. Currently, there is no effective way to lower the logging instrument to the toe position of the horizontal well.

Method used

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  • Crawler

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Embodiment Construction

[0052] 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. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0053] The embodiment of the present invention provides a crawler, such as figure 1 As shown, the crawler includes: a housing 1 , a controller 2 disposed in the housing 1 , a first power assembly 3 , a second power assembly 4 , a support arm 5 , rollers 6 , and a pressure sensor 7 . Wherein, the pressure sensor 7 is arranged on the roller 6 and is electrically connected with the controller 2 . The controller 2 is used to receive the pressure data transmitted by the pressure sensor 7, and control the first power assembly 3 to work according to the pressure data. The ...

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Abstract

The invention discloses a crawler which comprises a shell, a controller, a first power assembly, a second power assembly, supporting arms, wheels and pressure sensors. The controller, the first powerassembly and the second power assembly are arranged in the shell. The pressure sensors are arranged on the wheels and are electrically connected with the controller. The controller is used for receiving pressure data transmitted by the pressure sensors and controlling the first power assembly to work according to the pressure data. The first power assembly is connected with the supporting arms andis used for driving the supporting arms to stretch or contract. The wheels are arranged at the end portions of the supporting arms and abut against the inner wall of a shaft. The second power assembly is used for driving the wheels to rotate. By means of the crawler, it can be ensured that a logging instrument can be smoothly brought to the tiptoe position of the shaft.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a crawler. Background technique [0002] Because the output of horizontal wells is relatively large, usually 3-5 times that of vertical wells, major oil fields attach great importance to the development of horizontal wells. However, the logging and post-production testing of horizontal wells is still a difficult problem in the development of horizontal wells. One of the main difficulties is how to lower the logging instrument to the toe position of the horizontal section. [0003] Diameter changes, unevenness, etc. may occur in the wellbore of a horizontal well. There is currently no effective method in the prior art to lower the logging instrument into the toe position of the horizontal well. Therefore, it is very necessary to provide a crawler capable of pulling the logging instrument to the toe position of the horizontal well. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B23/00
CPCE21B47/00E21B23/00
Inventor 李洪军李树全张福兴杨显志张跃华吕志武何金宝黄丽周艳平岳鹏飞邹振巍王巍高磊岩
Owner PETROCHINA CO LTD