Elastic sleeve centralizer

By designing a casing elastic straightener including an upper end ring, a working rib plate, a lower end ring, a stop ring and a top wire, the problem of high resistance when entering the wellbore in the prior art is solved, and the rapid installation of the casing elastic straightener and low resistance to entering the wellbore is realized, which improves the convenience and safety of operation.

CN222668131UActive Publication Date: 2025-03-25SHAANXI NEWLAND INDUSTRIAL CORPORATION LIMITED
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Patent Information

Application Number
CN202421452922.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-24
Publication Date
2025-03-25
Estimated Expiration
2034-06-24

AI Technical Summary

Technical Problem

The existing casing elastic regularizer has a greater relative pull-in resistance when entering the wellbore, resulting in damage to the regularizer and easily lead to destructive compression of the rib plate when encountering obstacles in the well.

Method used

A casing elastic regularizer is designed, including an upper end ring, a working rib plate, a lower end ring, a stop ring and a top wire. Through the connection of pins or stops, the lower end ring rotates freely with respect to the stop ring 360°, achieving rapid installation of the regularizer and flexible entry into the wellbore.

Benefits of technology

The rapid installation of the straightener and low resistance entry into the wellbore is achieved, which avoids damage to the straightener during entry, and reduces the compression risk of the rib plate when encountering resistance in the well, and improves the convenience and safety of operation.

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Abstract

The utility model discloses a casing elastic centralizer which comprises an upper end ring, the bottom of the upper end ring is connected with a plurality of working rib plates, the sides, away from the upper end ring, of the working rib plates are jointly connected with a lower end ring, the outer wall of the lower end ring is sleeved with a check ring, the outer wall of the check ring is provided with a plurality of jackscrews, and the inner diameter of the upper end ring is the same as that of the lower end ring. And a plurality of through holes are uniformly formed in the lower end ring. According to the casing elastic centralizer, after installation is completed, the centralizer check ring and the casing are relatively fixed through the jackscrew, then the lower end ring is pulled through the pin or the check block, and therefore the whole centralizer is pulled into a well along with the casing, the entering resistance is relatively small, and destructive influence on a centralizer rib plate caused by entering difficulty can be avoided; in addition, even if the centralizer is blocked in a borehole, destructive compression of a centralizer rib plate cannot be caused by the pull-in type centralizer, and the centralizer can pass through more easily.
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