1. Sucker rod centralizer.

It is an anti wear tool for oil wells, suitable for eccentric wear pumping wells, especially for eccentric wear pumping wells and directional deviated wells above the neutral point of the pumping rod. Below the neutral point of the pumping rod, it is combined with the nylon centralizer on the pumping rod body to achieve better anti eccentric wear effect. Utilize the outer diameter of the centralizer sleeve to be greater than the outer diameter of the sucker rod coupling for the purpose of centralizing; The use of centralizer sleeves is a high-strength wear-resistant material that can wear the centralizer body when in contact with the oil pipe, reducing the wear of the oil pipe and achieving the goal of preventing eccentric wear.

2. Casing centralizer.

It can smoothly lower the casing to the predetermined depth and promote the casing to be centered in the wellbore. Ensure that the cement slurry replaces the clean annulus slurry. Obtain a more uniform cement sheath. Thus effectively improving the quality of cementing cement sealing. Bow spring casing centralizer. The connection type can be divided into welding type and weaving type. According to its shape, the casing can be divided into two types: single bow type and double bow type. The casing can be located in the center of the wellbore, so as to reduce the resistance when running the casing and the possibility of sticking, which is conducive to improving the displacement efficiency of cement slurry and the uniform distribution of cement sheath thickness.

3. Rigid centralizer.

Rigid centralizers are divided into types such as semi rigid, straight bar, and spiral

① Semi rigid centralizer.

A non hinged hoop with a very flat and rigid elastic plate welded to the hoop allows the pipe column to rotate. Cementing in the annulus can improve the displacement efficiency of cementing by rotating the casing.

② Spiral centralizer.

When encountering obstacles in the current casing operation, use its spiral shape to rotate and guide forward, allowing the casing string to pass through the obstructed area, reducing damage and failure of the centralizer, and ensuring effective centering; Its spiral shape can cause the upward flow of cement slurry to form a swirling flow, prevent cement slurry from flowing through grooves, and improve cementing quality; Compared with traditional centralizers, the production cost will not increase.