A screen pipe cementing device

By using a vortex short section and a mechanical packer in the screen pipe cementing well assembly, the problems of fluid column vibration caused by the sealed 'dead cavity' and premature packer opening in traditional technology have been solved, achieving uniform fluid flow inside and outside the tubing string and improving construction safety.

CN122190675APending Publication Date: 2026-06-12SHELFOIL PETROLEUM EQUIP & SERVICES CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHELFOIL PETROLEUM EQUIP & SERVICES CO LTD
Filing Date
2026-04-09
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing cementing completion technology using top screen pipes has problems such as fluid column vibration caused by sealed 'dead cavities' and premature opening of packers, which affect construction safety and efficiency.

⚗Method used

The vortex short section is used to replace the staged cement injector, the mechanical setting packer is used to replace the hydraulic expansion packer, and a self-grouting floating hoop is added to change the closed 'dead cavity' that exists in the traditional pipe column structure.

🎯Benefits of technology

It eliminates the 'dead space' inside and outside the tubing, avoids the pressure of liquid column turbulence, reduces construction risks, and improves the safety and efficiency of the lowering process.

✦ Generated by Eureka AI based on patent content.

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    Figure CN122190675A_ABST
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Abstract

The application provides a screen pipe cementing device, which comprises a pipe string, a cyclone sub is arranged on the pipe string, and cement slurry is returned from an annular space through the cyclone sub during cementing construction; wherein an upper portion of the pipe string is further provided with a packoff type liner hanger, the packoff type liner hanger comprises a hanger unit and a packer unit, and the packer unit is a mechanical packer. The cyclone sub is used to replace a staged cementing device, the mechanical packer is used to replace a hydraulic expansion packer, and a self-grouting float collar is further arranged, so that a closed "dead space" in a traditional pipe string structure is changed.
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