一种基于钻井液流量调控的保压取心差动机构及触发方法
By combining a hydraulic throttle valve and a prestressed spring, the drilling fluid flow rate is controlled to trigger coring, solving the cumbersome operation problem of pressure-maintaining coring in deep and ultra-deep wells, and improving coring efficiency and reliability.
CN121382089BActive Publication Date: 2026-07-17SICHUAN UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN UNIV
- Filing Date
- 2025-11-12
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
In existing technologies, differential operation using the ball-dropping pressure-holding method is cumbersome and time-consuming, and the steel ball cannot pass smoothly through the bottom of the well, making it difficult to achieve pressure-holding coring in deep and ultra-deep wells.
Method used
Hydraulic throttle valves and prestressed springs are used to replace pressure differential valves, and core sampling is triggered by drilling fluid flow rate regulation, which simplifies operation and improves reliability.
Benefits of technology
It has improved the efficiency and reliability of pressure-maintaining coring in deep and ultra-deep wells, simplified the operation process, and improved the controllability and safety of coring.
✦ Generated by Eureka AI based on patent content.
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Figure CN121382089B_ABST
Abstract
本发明公开一种基于钻井液流量调控的保压取心差动机构，包括内管总成，内管总成设于外管总成底端内部，内管总成包括液动节流阀门，液动节流阀门与外管总成之间设有第一弹簧，液动节流阀门底端套设于差动外管外，差动外管套设于差动内管外，差动外管顶部设有触发滑块，触发滑块贯穿滑动连接差动外管侧壁，触发滑块设于差动内管顶部，触发滑块适配设于液动节流阀门内的释放槽，差动外管底端固定连接外管总成，差动内管与外管总成之间设有第二弹簧，差动内管底端固连中心杆，中心杆底端设有取心保压组件。本发明利用预应力弹簧代替憋压差动，操作简便，可靠性高，差动提升力和提升速度可控，提高了深井、超深井下保压取心效率和可靠性。
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