一种分支井重入装置
By designing a branch well re-entry device, using a directional tool and perforated casing to provide guidance and protection, the problem of scraping of branch well re-entry tools was solved, and the accuracy of re-insertion and process reliability were improved.
CN116696236BActive Publication Date: 2026-07-17CHINA NAT PETROLEUM CORP +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA NAT PETROLEUM CORP
- Filing Date
- 2022-02-28
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
During the borehole locating process, the re-entry tool of the branch well scrapes against the downhole tubing, affecting the sealing performance and reducing the reliability of the branch well re-insertion fracturing process.
Method used
A branch well re-entry device was designed, including a branch well tubing string, a branch wellbore re-entry tool, and a main wellbore re-entry tool. By setting up a directional device and a perforated casing, guidance and protection are provided to prevent scraping and improve re-insertion accuracy.
Benefits of technology
It enhances the precision of the back-insertion sealing tool, prevents scratching, and improves the reliability of the back-insertion fracturing process in branch wells.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN116696236B_ABST
Abstract
本发明属于分支井作业技术领域，公开了一种分支井重入装置，包括分支井管柱、分井眼重入工具和主井眼重入工具；分支井管柱包括主管柱、分管柱、开孔套管、斜向器、主压裂机构和分压裂机构，主管柱插设于主井眼，分管柱插设于分支井眼，斜向器安装于主管柱，开孔套管随分压裂机构进入分管柱，开孔套管一侧开设正对斜向器的斜向面的斜通孔；分井眼重入工具包括分导向管、分定向管和分回插管，分导向管固定于开孔套管的内壁，设置导向斜面，分定向管设置抵靠导向斜面的定向斜面，分回插管能够依次穿过分定向管和分导向管，连接于分压裂机构。该分支井重入装置能够增加回插工具重入分支井的精确性，防止回插工具与管柱刮蹭，影响密封性能。
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