API Single Piece Centralizer with Set Screws
The elastic casing centralizer of our company uses heavy-duty springs to support the casing, which keeps the casing in the center for improved the centralizing performance.
Main features
Pressed by the mold, without welding and rivets, so the centralizer has a solid structure;
The centralizer has a trivalvular structure, which makes it easy for shipping;
The starting force and the reset force are both in accordance with the API standards;
Convenient Installation;
The displacement efficiency is improved more effectively with a spinning disk.
Technical Parameter:
| Specification |
In-Dia(mm) |
Wall
Thickness
(mm) |
Height(mm) |
Total height(mm) |
Largest Dia(mm) |
Spring Number |
| 5-1/2"*8-1/2" |
142-148 |
3-5 |
55 |
650 |
225 |
5 |
| 7"*9-5/8" |
181-186 |
3-5 |
55 |
650 |
255 |
6 |
| 7"*8-1/2" |
181-186 |
3-5 |
55 |
650 |
235 |
6 |
| 8-5/8"*12-1/4" |
223-228 |
3-5 |
55 |
650 |
330 |
8 |
| 9-5/8"*12-1/4" |
250-255 |
3-5 |
55 |
650 |
330 |
8 |
| 10-3/4"*12-1/4" |
274-276 |
3-5 |
55 |
650 |
330 |
9 |
| 13-3/8"*17-1/2" |
342-347 |
3-5 |
55 |
650 |
450 |
11 |
| 18-5/8"*24 |
476 |
3-5 |
55 |
600 |
610 |
12 |
| 20"*26 |
510 |
3-5 |
55 |
600 |
660 |
12 |
Fuction of casing flexible Casing centralizer:
1. Take casing to designed position by reducing sticking while casing going down.
2. Centralize casing in well.
3. Balance liquid pressure in annular space by reducing adhesion phenomenon.
4. Improving replacing ratio of mud and boosting cementing quality by reducing channeling effect.
Bow spring centralizer
1. These Centralizers are designed for High Restoring Force and Low Starting Force for centralizing the casing pipe in a Vertical, Horizontal and Deviated well
2. Premium quality Bows are made of special alloy steel and hot formed in totally controlled heat treatment plant to achieve the uniform hardness all over
3. Spec and performance index of bow spring casing centralizer meet API Spec 10D. The woven centralizer is connected by pin when in use, the unfolded centralizer can be stacked flatly for convenient storage and transportation.
This integral one-piece bow spring centralizer is a high-end centralization product. The
centralizers are built to gauge to offer easier, RIH, maximize standoff, and maximize the cement job. The UROS range of centralizers are built mostly for passing through close tolerance situations and then opening back up into under reamed holed sections, or washed out sections, while still providing quality stand-off performance. Bow spring sections are based on a straight bladed principle, but are curved in both axial and tangential directions. This cross curvature conforms to the borehole wall, while the axial curvature changes proportionally as it encounters different loads. As the loads increase, the surface contact area also increases, reducing the load per square unit of area. This helps avoid compression and shear failure of the formation surface.
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