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A kind of air drilling roller cone bit device

A technology of roller cone bit and air drill, which is applied to drill bit, driving device for drilling in wellbore, earth-moving drilling, etc. Problems such as short life and restricting the well formation speed of hot dry rock development can improve the rock breaking efficiency, enhance the rock breaking effect and prolong the working life.

Active Publication Date: 2021-06-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limited temperature resistance of the rubber-sealed bearings and hydraulic oil of the air drilling roller cone bit device, they cannot meet the construction environment above 200°C, which makes the life of the roller cone air drilling roller cone bit device extremely short, so it needs to be restarted repeatedly Drilling down to replace the air drilling roller cone bit device severely restricts the well completion speed of hot dry rock development and affects the efficiency and cost control of hot dry rock development

Method used

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  • A kind of air drilling roller cone bit device
  • A kind of air drilling roller cone bit device

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Embodiment Construction

[0021] The present invention is introduced below by accompanying drawing.

[0022] figure 1 The structure of an air drilling roller cone bit device 100 for developing hot dry rock according to the present invention is shown. Such as figure 1 As shown, the air drilling roller cone bit device 100 is generally in a cylindrical structure as a whole. The air roller cone bit assembly 100 includes an inner barrel 120 for receiving high pressure air. The inner cylinder 120 is configured as a cylindrical structure, and the upstream end of the inner cylinder 120 is provided with a connecting portion 121, which is preferably a connecting thread. Thus, the air drilling roller cone bit device 100 is connected with other downhole drilling tools through connecting threads. The threaded connection structure of the inner cylinder 120 makes the installation and connection of the air drill roller cone bit device 100 very convenient and fast.

[0023] In this application, when the air-drilli...

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Abstract

The invention provides an air drilling roller cone bit device, comprising: an inner cylinder for receiving air and an outer cylinder arranged outside the inner cylinder, a cooling cavity is formed between the inner cylinder and the outer cylinder; several settings A vortex tube in the cooling cavity, the vortex tube is used to convert the air from the inner cylinder into high-temperature airflow and low-temperature airflow; and a roller cone bit installed at one end of the outer cylinder, the roller cone bit is set There is a bearing cooling mechanism, wherein the cryogenic gas flow generated by the vortex tube is directed to the bearing cooling mechanism.

Description

technical field [0001] The invention relates to the fields of geothermal resource development and oil drilling, in particular to an air drilling roller bit device, in particular to an air drilling roller bit device for developing hot dry rock. Background technique [0002] With the increasing depletion of mineral resources and serious environmental pollution, people began to actively develop new energy sources. Among them, hot dry rock geothermal energy has the characteristics of green, low-carbon, pollution-free, and huge reserves. Therefore, hot dry rock resources have gradually become a hot spot for new energy development. [0003] The occurrence conditions of hot dry rock resources have two characteristics, one is high formation temperature, the temperature is as high as 200-300 ℃; the other is hard formation, the general lithology is granite and igneous rock, and the uniaxial compressive strength is generally above 200Mpa Above, the drillability is close to grade 10, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/02E21B10/18E21B4/02E21B21/16
CPCE21B4/02E21B10/02E21B10/18E21B21/16
Inventor 王磊柯珂周号博张辉张东清孙峰钱德儒吴超孙连忠孙连环
Owner CHINA PETROLEUM & CHEM CORP
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