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A double-row dovetail sealing structure for a roller cone bit

A sealing structure, roller cone bit technology, applied in construction and other directions, to reduce friction and friction heat, increase stability, and improve sealing life.

Active Publication Date: 2017-09-12
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the deficiency of the sealing structure of the existing roller cone bit, and to provide a double-row dovetail sealing structure of the roller cone bit.

Method used

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  • A double-row dovetail sealing structure for a roller cone bit
  • A double-row dovetail sealing structure for a roller cone bit

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Embodiment Construction

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

[0010] Such as figure 1 As shown: the claw 1 and the cone 2 are respectively socketed on the bearing 5 through the inner hole of the cone, the steel ball 3 is put into the bearing through the pin hole, and the plug 4 is welded and fixed, and the cone 2 is held by the steel ball 3 on bearing 5. A double-row dovetail sealing ring 6 is arranged between the cone 2 inner hole and the bearing 5 .

[0011] Such as figure 1 , 2 As shown, a double-row dovetail sealing structure of a roller cone bit in the present invention is composed of a roller cone 2, a bearing 5, and a double-row dovetail sealing ring 6; the double-row dovetail sealing ring 6 is a combination of two dovetail sealing rings. , the bottom surface of the double-row dovetail seal ring 6 is a large end face, and the top surface of the double-row dovetail seal ring 6 is a small end face, which improv...

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Abstract

The invention discloses a double-row swallow-tail sealing structure of a roller bit. The double-row swallow-tail sealing structure is composed of a roller cone, a bearing and a double-row swallow-tail sealing ring. The double-row swallow-tail sealing ring is of an integrated structure composed of two swallow-tail sealing ring bodies in a combined mode, the bottom face is a large end face, the top face is a small end face, the self-sealing performance is improved, and distortion, rotation and vibration of the double-row swallow-tail sealing ring are avoided. The top face and the bottom face in the axial direction are both of the structures each formed by combining arc protrusions and an arc groove; as sealing is carried out through the multiple arc protrusions, the sealing area is effectively reduced, multilevel sealing is achieved, and lubricating grease can be conveniently stored through the grooves. As the two sides of the double-row swallow-tail sealing ring in the radial direction are of symmetrical structures combining slopes and arcs, stress concentration is reduced; multilevel sealing is achieved through the multiple protrusions, and the slopes have the automatic deformation compensating function. The middle of the double-row swallow-tail sealing ring is provided with two holes of the same structures composed of arcs and slopes, the slope degree of the slopes is the same as that of the outside slopes, the top face is in an arc shape, the bottom face is planar, and stress concentration is reduced.

Description

technical field [0001] The invention relates to a double-row dovetail sealing structure of a roller cone bit suitable for oil drilling and geological exploration, and belongs to the field of roller bit bearing sealing. Background technique [0002] The roller cone bit is the most important drilling tool in drilling exploration. It is widely used and occupies an important position in the drill bit market. The seal is the most critical part of the roller cone bit and is also a vulnerable part. The performance of the sealing system directly determines the service life of the roller cone bit. The seal life is short and the failure is serious, which seriously affects the drilling project. The main problems of the sealing of the roller cone bit are: first, the contact area of ​​the sealing ring is large, and the high temperature at the bottom of the well makes the friction force and friction heat increase sharply, which accelerates the aging and wear of the sealing ring. The seco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/25
CPCE21B10/25
Inventor 周已王林黄志强
Owner SOUTHWEST PETROLEUM UNIV
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