一种解封难度小的套变井封堵装置
By using a double Z-type interlocking rubber sleeve expansion anti-overturning mechanism and a soluble component design, reliable sealing and convenient unsealing of the casing-variable well plugging device are achieved, solving the problem of difficult unsealing of the casing-variable well packer in high-temperature environments. It is suitable for casing-variable well plugging under different working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PETROCHINA CO LTD
- Filing Date
- 2024-03-25
- Publication Date
- 2026-07-17
AI Technical Summary
Existing packers are difficult to unseal, especially in heavy oil wells where casing damage is frequent. Conventional packers have a large expansion rate, making unsealing difficult and hindering downhole operations.
The double Z-type interlocking rubber sleeve expansion anti-overturning mechanism uses a soluble component made of soluble material to inject mineralized liquid into the wellbore to dissolve it. Combined with heat-sensitive material or locking ring design, it realizes the setting and unsealing of the rubber sleeve, reducing the difficulty of unsealing.
It improves the reliability of plugging and the convenience of unplugging, solves the problem of difficult unplugging of casing-type well packers in high-temperature environments, and adapts to the plugging needs of casing-type wells under different working conditions.
Smart Images
Figure CN120701276B_ABST