A sand-eroding nib

By designing an inclined tip body, blade, and swirling fluid structure on the sand-washing pen tip, the problem of the difficulty in breaking cemented sand surfaces in existing technologies has been solved, achieving a highly efficient sand-washing effect and improved efficiency, making it suitable for oilfield downhole operation tools.

CN224314938UActive Publication Date: 2026-06-02SINOPEC OILFIELD SERVICE CORPORATION +1
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Utility models(China)
Current Assignee / Owner
SINOPEC OILFIELD SERVICE CORPORATION
Filing Date
2025-06-20
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing sand-washing pen tips are ineffective at breaking up cemented sand surfaces when dealing with horizontal wells or wells with severely cemented sand surfaces, resulting in poor sand-washing effect, low sand-washing efficiency, and impact on crude oil production.

Method used

A sand-washing pen tip was designed, comprising an inclined pen tip body and a surrounding blade structure. Combined with a swirling fluid and jet holes, it forms a hydraulic turbulence to improve sand-carrying capacity. The blades break up cemented sand blocks and form stepped liquid flow channels to enhance the sand-washing effect.

Benefits of technology

It improves the crushing efficiency of cemented sand surfaces, enhances the sand-carrying capacity, and achieves efficient sand flushing operations, meeting the sand flushing needs of horizontal wells or wells with severe sand surfaces.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224314938U_ABST
    Figure CN224314938U_ABST
Patent Text Reader

Abstract

This utility model relates to a sand-flushing pen tip, belonging to the technical field of downhole operation tools for oilfield development. It includes an upper connector with an inner hole, a swirling fluid, and a pen tip body. The two ends of the swirling fluid are respectively connected to the pen tip body and the upper connector for connecting the tubing string, so that the upper connector, the swirling fluid, and the inner hole of the pen tip body are connected to form a fluid flow channel for the sand-flushing fluid to flow through. The end face of the pen tip body away from the end connected to the swirling fluid is inclined, forming a sharp point for inserting into the sand surface. Several blades are distributed on the outer circumference of the pen tip body to break up the sand surface. This utility model uses the sharp point on the pen tip body to break up the sand surface and then insert it into the sand surface. The blades distributed on the outer circumference of the pen tip effectively break up and loosen cemented sand blocks in the wellbore, thereby improving the sand-flushing effect of the pen tip and achieving the purpose of efficient sand-flushing operation.
Need to check novelty before this filing date? Find Prior Art