Roller centralizer/Rigid centralizer
Type of casing centralizer:
1. Roller centralizer
2. Bow spring centralizer
3. Rigid centralizer
Roller Casing Rigid Centralizers are available in sizes 4½" to 20". The Roller Centralizer consists of rigid body, on which machined five spiral blades or straight blades. There are modified alloy steel, fully heat treated rollers fixed on every blade. The capability of the roller Centralizer is better than others of all. Roller/Wheeled centralizers are mainly used for big high roller, high deviated wells and horizontal wells, to centre casings. Roller Casing Rigid Centralizers can also remove wellbore cake and improve mud replacement efficiency etc.
Model | Style | Max OD (mm) | ID (mm) | Length (mm) |
ZSGF-4 1/2 x 6 | I, II, III | 145 | 116.5 | 200 |
ZSGF-5 x 6 | I, II, III | 145 | 129 | 200 |
ZSGF-5 1/2 x 8 1/2 | I, II, III | 205-210 | 142 | 200/300 |
ZSGF-6 5/8 x 8 1/2 | I, II, III | 205/210 | 171 | 200/300 |
ZSGF-7 x 8 1/2 | I, II, III | 205/210 | 181 | 200/300 |
ZSGF-7 x 9 1/2 | I, II, III | 225-235 | 181 | 200/300 |
ZSGF-7 x 9 5/8 | I, II, III | 225-235 | 181 | 200/300 |
ZSGF-9 5/8 x 12 1/4 | I, II, III | 300-305 | 248 | 200 |
ZSGF-13 3/8 x 17 1/2 | I, II, III | 430-435 | 346 | 200 |
Note: ZSGF series rigid casing centralizer, classified as straight strip type(type I), spiral (type II), roller type (type III)