High-sealing roller bit

A roller cone bit and high-sealing technology, which is applied in construction and other directions, can solve the problems that affect the life of sealing elements and the ability to adapt to temperature, the friction of sealing parts is small, and the assembly process is cumbersome, so as to achieve good product consistency and small sealing space , Reduce the effect of processing procedures

Inactive Publication Date: 2012-10-24
TIANJIN LILIN BIT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantage is that the friction force of the seal is small and the ability to adapt to high speed is strong; however, due to the existence of the rubber ring, the life of the sealing element and the ability to adapt to the temperature are affected; at the same time, the number of elements takes up a lot of space, the system is complex, and the manufacturing requirements are high. The assembly process is cumbersome, which limits the scope of use

Method used

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Embodiment Construction

[0028] 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 1 Shown: a high-tightness roller cone bit, including the cone 3 and the palm shaft 4, the cone and the palm shaft are locked together by the positioning steel ball 5 installed in the "R" shaped groove between the two , the two can only rotate radially and cannot slide axially. A sealing groove is provided near the opening of the cone shaft hole of the cone, and a sealing part is arranged in the sealing groove, and the sealing part is composed of a sealing jacket 1 and an energy storage spring 2, and the sealing part is sleeved on the accumulator can spring on.

[0029] Such as figure 2 Shown is an enlarged view of the cross-sectional structure of the sealing component of the present invention in an unassembled state, and the cross-sectional shape of the sealing jacket is an inverted "U" ...

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Abstract

The invention relates to the technical field of well drilling tools, and in particular relates to a high-sealing roller bit, comprising a roller cone and a palm shaft, wherein the opening position of a roller cone shaft hole near the roller cone is provided with a sealing groove. The high-sealing roller bit is characterized in that a sealing part is arranged in the sealing groove, and the sealing part comprises a sealing jacket and an energy storage spring and is sleeved on the energy storage spring. The high-sealing roller bit has a simple and compact structure. A spring energy-storage sealing ring of the roller bit has elasticity and excellent deformation ability. A rubber ring of the traditional metal end face sealing device is not needed as the functional ring and auxiliary sealing element, a small sealing space is needed, and the adaptability to high speed is high. As the sealing jacket of the spring energy-storage sealing ring is made of polyfluortetraethylene, the high-sealing roller bit has the advantages of low friction coefficient and high adaptability to high speed compared with the roller bit with the sealing jacket made of traditional rubber sealing material hydrogenated nitrile.

Description

technical field [0001] The invention relates to the technical field of drilling tools, in particular to a high-tightness 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 mining drilling and other fields. With the further development of petroleum resources, the number of oil wells that can be exploited by conventional drilling is decreasing, and the difficulty of extraction is becoming more and more difficult. More and more oil wells are developed by unconventional drilling. The proportion of special craft wells such as horizontal wells and branch wells in oil production is increasing, so that there are more opportunities to use downhole power drilling tools for a longer time. It is more and more widely used, and its characteristic is that the drill bit speed has been greatly improved, which has exceeded 2-3 times that of the original rotary table dr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/25
Inventor 吴玉旺胡友生
Owner TIANJIN LILIN BIT
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