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Roller bit

A technology of roller cone bit and geological drilling, which is applied in the direction of drill bit, drilling equipment, earth-moving drilling and mining, etc., can solve the problems affecting the processing quality, the service life of the roller cone bit, and the difficulty of machining.

Inactive Publication Date: 2006-07-19
李荟敏
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In addition, as an important part of the bearing, the friction pair such as the raceway, the existing structure and the palm are integrated, which brings difficulties in machining, which in turn affects the quality of machining, and also brings negative effects to the service life of the roller cone bit. influences

Method used

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Embodiment Construction

[0019] Such as figure 1 Shown is a schematic cross-sectional view of the cone of the present invention, in which 1 is the cone, 2 is the cone shaft, 3 is the tapered roller, 4 is the tower-type multi-coil spring, 5 is the anti-rotating pin, 6 is the anti-rotating groove, and 7 is Multi-turn thin lip type end face sealing device, the rest is basically similar to a conventional cone, not shown, and will not be repeated.

[0020] Such as figure 2 Shown as figure 1 An enlarged schematic diagram of a cross-sectional view of the sealing part.

[0021] Such as image 3 Shown as figure 1 An enlarged schematic diagram of the cross-sectional view of the locking part.

[0022] Such as Figure 4 Shown is the front view of the multi-turn thin lip type end face sealing device of the present invention.

[0023] Fig. 5 is a cross-sectional view of the multi-turn thin-lip type end face sealing device of the present invention. It has a metal skeleton 8 for mounting and fixing to the root of the...

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Abstract

The invention discloses a cone drill bit, which uses the locking device in tower shape and multi-spring for saving the space and multi-spring lip-shape end face sealing device; uses multi-ring slip-shape end face sealing device, therefore, the sealing material will be abraded from outer to inner, to prolong the service life. It uses tower-shape multi-spring locking device to utilize the taper space inside the sharp of cone, compared to present circlip locking device, which has less accommodation space, improved bearing size, reduced bearing stress, and prolonged bearing service life.

Description

Technical field [0001] The invention relates to a roller cone bit, which is suitable for manufacturing roller cone bits for mining, petroleum, natural gas, groundwater drilling and exploitation, geological drilling, civil construction and the like. Background technique [0002] Conventional roller cone bits are divided into rolling bearing and sliding bearing cone bits according to the bearing form. According to the tooth form, they are divided into two categories: inserts and steel tooth cone bits. According to the number of cones, they are divided into three cones and single cones. There are two categories of drill bits. But the common problem they face is that the life is not long enough, especially the relatively short seal life and bearing life, which cause the early failure of the roller cone bit to account for 70% to 80% of all failure rates. Although there have been some new designs of bearings and seals, the main structure has not changed much. The bearing is still a rol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/08E21B10/20E21B10/22
Inventor 李荟敏
Owner 李荟敏
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