一种多重密封浮箍
By employing a multi-layered sealing structure and a pressure relief chamber design, the problem of low back pressure resistance of the float band and float shoe was solved, achieving a higher sealing effect and ensuring cementing quality.
CN120649840BActive Publication Date: 2026-07-17CHINA NAT PETROLEUM CORP +2
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA NAT PETROLEUM CORP
- Filing Date
- 2024-03-08
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing floats and float shoes have low back pressure resistance, which can easily cause cement backflow and blockage, affecting cementing quality.
Method used
A multi-seal floating hoop is designed, including a self-locking rubber plug, first and second plunger sealing valves, and a triple sealing structure and pressure relief chamber to enhance the sealing effect and prevent cement backflow.
Benefits of technology
It improves resistance to back pressure, prevents cement backflow, ensures cementing quality, and simplifies structural design.
✦ Generated by Eureka AI based on patent content.
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Figure CN120649840B_ABST
Abstract
本发明属于石油天然气钻井技术领域，具体涉及一种多重密封浮箍，壳体内同轴设有胶塞座，胶塞座中安装自锁胶塞，自锁胶塞中部有密封圈，胶塞座上的L形延伸部一端有锥形导向面，内侧为泄压腔，外侧为变径柱塞密封部，变径柱塞密封部通道与壳体偏心；变径柱塞密封部通道同轴设有第一柱塞密封阀，第一柱塞阀芯上有密封圈；变径柱塞密封部下侧通道中有蘑菇密封阀，蘑菇密封阀与壳体偏心设置并且偏心方向与第一柱塞密封阀相反，蘑菇密封阀座固定在胶塞座下端与第一柱塞密封阀偏心方向一致的一侧上，蘑菇密封阀杆底部套装在蘑菇密封阀花篮中。通过三重密封和泄压腔，有效提升了密封结构的密封效果，提高了抗回压能力，并有效避免了水泥反流。
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