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Rolling thrust device for cone bit bearing

A roller cone bit and thrust technology, applied in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of restricting the extension of bearing life, bit failure, high heat generation, etc., to prolong the service life, avoid mud bag, The effect of avoiding wear

Inactive Publication Date: 2010-11-24
TIANJIN LILIN GASOLINEEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used roller cone bits have a short service life. One of the main reasons is that the bearing generates a lot of heat and wears heavily, which leads to early failure of the bit.
The heat generation of the bearing comes from many aspects, one of the reasons is the sliding friction of the axial thrust surface. During the drilling process of the roller cone bit, the addition of drilling pressure and the reaction force drilled into the bottom layer make the cone and the palm There is a huge friction force between the two thrust surfaces of the bearing, which not only generates a lot of heat, but also wears seriously, which greatly restricts the extension of the bearing life

Method used

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  • Rolling thrust device for cone bit bearing
  • Rolling thrust device for cone bit bearing
  • Rolling thrust device for cone bit bearing

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0010] In order to better understand the solution of the present invention, it is necessary to make a brief introduction to the traditional roller cone bit which is slidingly fitted with the thrust surface. figure 1 is a cross-sectional view of the sliding thrust surface of a traditional roller cone bit, such as figure 1 As shown, after the "O"-shaped sealing ring 5 is installed in the cone 1, it is assembled with the tooth palm shaft 2, and the locking steel ball 4 is inserted into the cone locking steel ball track 11 and the tooth palm through the plug hole 23. Between the locking steel ball raceways 21, the plug pin 6 is welded firmly after being packed into the plug pin hole 23, and the locking steel ball 4 is limited in the locking steel ball raceways 11,21. After the locking steel ball 4 is loaded, the axial positions of the cone 1 and the tooth ...

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Abstract

The invention discloses a rolling thrust device for a cone bit bearing. The rolling thrust device is characterized in that: a thrust steel ball group is arranged between a cone and a cone leg thrust surface; and a radial position of the thrust steel ball group is controlled in a steel ball runway which is arranged on the cone, or on the cone leg or on the cone and the cone leg at the same time. The device reduces friction of the axial thrust surface of the cone bit bearing and prolongs the service life of the cone bit bearing.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling tools, in particular to a rolling thrust device of a roller cone bit bearing. Background technique [0002] With the development of the oil drilling industry, it is imperative to improve the service life and drilling efficiency of the roller cone bit as one of its main drilling tools. The currently used roller cone bits have a short service life. One of the main reasons is that the bearing generates a lot of heat and wears heavily, which leads to early failure of the bit. The heat generation of the bearing comes from many aspects, one of the reasons is the sliding friction of the axial thrust surface. During the drilling process of the roller cone bit, the addition of drilling pressure and the reaction force drilled into the bottom layer make the cone and the palm There is a huge friction force between the two thrust surfaces of the bearing, which not only generates a lot of heat, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/22
Inventor 刘子洲
Owner TIANJIN LILIN GASOLINEEUM MACHINERY
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