Roller cone bit and method for installing roller cone bearing sealing system of roller cone bit

A roller cone bit and bearing sealing technology, which is applied in construction and other directions, can solve the problem of inability to accurately control the contact specific pressure of the sealing system, and achieve the effects of large contact specific pressure, smooth rigidity curve, and large displacement

Inactive Publication Date: 2014-11-26
TIANJIN LILIN BIT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It shows that the current sealing system cannot accurately control the contact specific pressure of the sealing system

Method used

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  • Roller cone bit and method for installing roller cone bearing sealing system of roller cone bit
  • Roller cone bit and method for installing roller cone bearing sealing system of roller cone bit
  • Roller cone bit and method for installing roller cone bearing sealing system of roller cone bit

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Embodiment Construction

[0031] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. Such as Figure 7 with Figure 8 Shown, a kind of roller cone bit, comprise cone, tooth palm 2 and be used for the positioning steel ball 9 that described cone and tooth palm are fixed, the root of described cone is provided with cone bearing hole 1, described A bearing sealing system is arranged in the cone bearing hole, and the bearing sealing system is composed of a cone metal seal ring 3, a tooth palm metal seal ring 4, a cone metal rubber seal ring 6, and a wave spring 7 for energy supply of the cone metal ring The metal sealing ring of the gear cone and the metal sealing ring of the tooth palm are in contact to form an end face sealing structure. There is a groove in the middle of the metal sealing ring of the gear cone, and the wave spring for the metal gear cone is placed in the groove In the gro...

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PUM

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Abstract

The invention relates to the technical field of drilling tools, in particular to a roller cone bit and a method for installing a roller cone bearing sealing system of the roller cone bit. The roller cone bit comprises a roller cone, a roller palm shaft and positioning steel balls used for fixing the roller cone and the roller palm shaft, wherein a roller cone bearing hole is formed in the root of the roller cone, the bearing sealing system is arranged in the roller cone bearing hole and is composed of a metal roller cone sealing ring, a metal roller palm sealing ring, a metal and rubber roller cone sealing ring and a wave spring used for supplying power to a metal roller cone ring, the metal and rubber roller cone sealing ring is located on one side of the metal roller cone sealing ring and is used for sealing the gap between the metal roller cone sealing ring and the roller cone bearing hole. According to the roller cone bit and the method for installing the roller cone bearing sealing system of the roller cone bit, through the metal end face sealing system mainly powered by the crest-to-crest wave spring or is completely powered by the crest-to-crest wave spring, the specific contact pressure of a sealed end face can be accurately controlled, and the specific contact pressure is high, lasting and constant.

Description

technical field [0001] The invention relates to the technical field of drilling tools, in particular to a roller cone bit. Background technique [0002] The roller cone bit is a tool for breaking rocks in the earth's crust, and is widely used in oil, natural gas drilling, and other mineral resource drilling and development. [0003] The analysis of the failure of the tricone bit shows that the damage of the bearing is the main form of the failure of the tricone bit, and most of the early failure of the bearing is due to the failure of the bearing sealing system, which leads to the loss of the bearing lubricating grease and the invasion of the bearing. Therefore, we It is often seen that the tooth wear of the roller cone bit is not serious, but the bearing has failed and moved. [0004] As we all know, today's sealing systems use the elasticity of hydrogenated nitrile rubber (HNBR) to provide energy for the sealing working surface. Hydrogenated nitrile rubber (HNBR) has exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/25
Inventor 陈斌罗绪良
Owner TIANJIN LILIN BIT
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