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Single Metal Composite Sealing Structure for Roller Bits

A composite seal and roller cone bit technology, which is applied to drill bits, earthwork drilling, drilling equipment, etc., can solve problems such as seal failure, and achieve the effects of ensuring reliability, reducing friction, and increasing heat dissipation area

Inactive Publication Date: 2019-07-30
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to design a single-metal composite sealing structure for roller cone bits with more reliable sealing performance and longer service life in order to overcome the problem that the existing single-metal sealing device is prone to seal failure in the harsh downhole working conditions

Method used

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  • Single Metal Composite Sealing Structure for Roller Bits
  • Single Metal Composite Sealing Structure for Roller Bits
  • Single Metal Composite Sealing Structure for Roller Bits

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] Depend on Figure 1 to Figure 5 As shown, the single-metal composite seal structure for the roller cone bit is mainly composed of a dynamic seal ring 9, a static seal ring 8, an X-shaped rubber seal ring, a support ring 6 and a tooth palm journal 1, where the dynamic seal ring 9 is located The outer end of the inner hole 10 of the cone 2 and the root of the journal 1 of the tooth palm form a sealing cavity, and the single metal sealing device composed of a dynamic sealing ring 9, a static sealing ring 8, an X-shaped rubber sealing ring and a support ring 6 is put into the In the sealing chamber, the dynamic sealing ring 9 is in interference fit with the inner hole 10 of the cone 2, and the other end of the dynamic sealing ring 9 is in contact with the shoulder of the inner hole 10 of the cone 2. The dynamic sealing ring 9 rotates with th...

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Abstract

The invention relates to a monometallic compound seal structure for a roller bit. The monometallic compound seal structure for the roller bit is widely used in rotating dynamic seal of oil and gas andmining downhole power tools to prevent oil leakage inside a bearing and prevent external mud from entering the bearing. The monometallic compound seal structure for the roller bit is mainly composedof a dynamic seal ring, a static seal ring, an X type rubber sealing ring, a support ring and a palm shaft journal. According to the technical scheme, the outer end part of a cone inner hole in whichthe dynamic seal ring is located and the root portion of the palm shaft journal constitute a seal cavity, and a monometallic compound seal device formed by the dynamic seal ring, the static seal ring,the X type rubber sealing ring and the support ring is placed into the seal cavity; the dynamic seal ring is in interference fit with the cone inner hole, and the contact face of the dynamic seal ring and the static seal ring is a sealing face; and the X type rubber sealing ring is compressed inside the support ring by the static seal ring. The monometallic compound seal structure for the rollerbit improves the monometallic seal structure, increases the seal reliability, increases the heat dissipation area, improves the wear resistance and prolongs service life.

Description

technical field [0001] The invention relates to a single metal composite sealing structure for a power drilling tool. Background technique [0002] Single metal seal is a commonly used rotary dynamic seal in downhole power tools. It has the characteristics of simple structure, small space occupation, strong shock and vibration resistance, high speed and long life. It can be used in high temperature, high pressure, grinding and vibration in downhole Therefore, it is widely used in oil and gas and mining. Its function is to prevent the leakage of lubricating oil in the sealing cavity and resist the wear and tear from the fluid outside the drilling. The single metal seal structure currently in use consists of an O-shaped rubber ring, a dynamic seal ring, a static seal ring with a smooth top, a supporting rubber ring and a palm journal. The single metal seal structure will not only be subjected to the elastic force of the O-shaped rubber ring and the supporting rubber ring, but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/08E21B10/25
CPCE21B10/08E21B10/25
Inventor 张杰胡洋张瀚
Owner SOUTHWEST PETROLEUM UNIV
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