A small-diameter oil pipe dusting cylinder and a dusting method
By designing the piston and impact assembly of the ash discharge cylinder for small-diameter oil pipes, the controllable release and full-volume delivery of cement slurry within the small-diameter oil pipes were achieved, solving the sealing and safety issues of small-diameter oil pipe plugging and ensuring construction safety.
CN118008196BActive Publication Date: 2026-07-24TOP WELL PETROLEUM TECH COMPANY
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TOP WELL PETROLEUM TECH COMPANY
- Filing Date
- 2024-03-01
- Publication Date
- 2026-07-24
AI Technical Summary
Technical Problem
Existing ash discharge cylinders are difficult to effectively plug with cement inside small-diameter oil pipes, resulting in poor sealing and stability, and posing safety hazards.
Method used
A small-diameter oil pipe ash discharge cylinder was designed, which includes a piston assembly and an impact assembly. The mechanical structure realizes the pushing and releasing of cement slurry to avoid sticking problems. Copper and aluminum shear pins are used to ensure controllability and safety.
Benefits of technology
It enables the controlled release and full-volume delivery of cement slurry inside small-diameter oil pipes, ensuring sealing performance and construction safety, and solving the technical challenge of sealing small-diameter oil pipes.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN118008196B_ABST
Abstract
The application discloses a small-diameter oil pipe dusting cylinder and a dusting method, and belongs to the technical field of oil pipe dusting and plugging under pressure in oil and gas fields; the existing dusting cylinder is not suitable for being used for cementing in small-diameter oil pipes; the dusting cylinder comprises a piston assembly, an upper sleeve, a lower sleeve and a striking assembly; the upper sleeve is connected with the lower sleeve, and the inner cavities of the upper sleeve and the lower sleeve are communicated; the piston assembly is arranged in the upper sleeve; the striking assembly is arranged in the lower sleeve; a valve is arranged on one end of a striking rod close to the upper sleeve, the valve is used for plugging the port of the lower sleeve; the piston assembly is used for pushing the cement slurry in the upper sleeve to the lower sleeve; the cement slurry is introduced into the lower sleeve from the upper sleeve through the port, and is discharged from the cement slurry outlet on the side of the lower sleeve; the dusting cylinder is provided with the piston in the upper sleeve, the cement slurry is pushed out of the upper sleeve through the extrusion of the piston, and the problem that the cement slurry cannot be naturally discharged due to strong adhesion is effectively avoided.
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