Anti-deformation casing centralizer

Abstract

The invention discloses an anti-deformation casing centralizer, and relates to the technical field of oil exploitation equipment. The anti-deformation casing centralizer comprises a centralizer body, the centralizer body is divided into a plurality of bow springs and two ring seats, the two ring seats are connected through the bow springs, a sealing cover is arranged at one end of each ring seat, the sealing covers and the ring seats are fixedly connected through sunk screws, and sealing gaskets are arranged between the sealing covers and the ring seats; and an annular groove is concavely formed in the circumferential surface of each ring seat, a rotating ring is rotatably connected into each annular groove, a plurality of fastening rods are arranged on an outer wall, and one end of each fastening rod is fixedly connected with a wall scraping plate. By arranging the wall scraping plates on the centralizer body and controlling the wall scraping plates to rotate, on one hand, the centralizing force of the centralizer body on a casing pipe is increased through the wall scraping plates and the fastening rods, on the other hand, the rotating rings rotate, so that the wall scraping plates scrape dirt on the inner wall of a pipeline, the centralizer body is prevented from deforming, the service life of the centralizer is prolonged, and the oil exploitation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of oil exploitation equipment, in particular to a casing centralizer for preventing deformation. Background technique [0002] The centralizer is a tool for stabilizing downhole drilling tools and preventing deflection. It is installed on the casing string and used to stabilize the drilling direction. tool; [0003] At present, the casing centralizers used in oil exploitation include rigid centralizers, spring centralizers, swirl spring centralizers and integrated bow-spring casing centralizers. Among them, the integrated bow-spring casing centralizer adopts integral The steel plate is coiled and formed, with high processing precision, suitable for various wellbore sizes, and only needs a very small starting force and lowering force to realize the centering of the casing in the well, and enhance the centering recovery force of the casing, with high strength and reliability Its indicators are in line with t...

AI Technical Summary

Problems solved by technology

[0003] At present, the casing centralizers used in oil exploitation include rigid centralizers, spring centralizers, swirl spring centralizers and integrated bow-spring casing centralizers. Among them, the integrated bow-spring casing centralizer adopts integral The steel plate is coiled and formed, with high processing precision, suitable for various wellbore sizes, and only needs a very small starting force and lowering force to realize the centering of the casing in the well, and enhance the centering recovery force of the casing, with high strength and reliability Its indicators are in line with the API10D standard. However, in the process of oil extraction, due to factors such as the variability of the extraction location or the adhesion of oil, the inner wall of the drill bit becomes narrow or irregular, and the integrated When the bow-spring casing centralizer is used, it is not easy to enter, and it cannot be accurately corrected, resulting in deformation and affecting the efficiency of oil extraction

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