7/8" UHMWPE Sucker Rod Centralizer for Oil Wells with API 11B Standard
. Introduction of sucker rod centralizer
The sucker rod centralizers are used to protect sucker rod to reduce wearing.
2. Material
2.1. Plastic: UHMWPE (Ultra High Molecular Weight Polyethylene)
2.2. Rubber: Nitrile
2.3. Nylon: Nylon 6/6
2.4.. 42CrMo
3. Structure
3.1. Pure plastic
3.2. Steel frame, rubber inside and outside
3.3. Nylon6/6 roller and alloy steel body
4. Specification
4.Application
| CASING SIZE | TUBING CENTRALIZER | TUBING CENTRALIZER | |
| NO. | OCTG ERW | (ID) | (OD) |
| 1 | 5.5" | 2-3/8"(60.325mm) | 110mm |
| 2 | 7" 6" | 2-3/8"(60.325mm) | 140mm |
| 3 | 7" 6" | 2-7/8"(73.025mm) | 140mm |
| 4 | 2-7/8"(73.025mm) | 114-115mm | |
| 5 | 7" | 3-1/2"(88.900mm) | 140mm |
| 6 | 0.83"(210.82mm) | 419.1mm | |
| 7 | 1.19"(302.26mm) | 419.1mm | |
| Remark |
Rod centralizers with full-bore-fluted centralizers should be placed on or between the pump-handling pony rod, the sinker bars used above the pump, and the first two sucker rods above the sinker bars. Rod centralizers in these locations help stabilize the pump and valve rod and prevent valve-rod bending or breakage. When a tubing anchor is not used, rod centralizers will reduce tubing wear because of tubing helical buckling on the upstroke. Rod centralizers also may be used in crooked holes in which there are areas of concentrated tubing wear.
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