Skip to content 
Hinged Welded Bow Spring Centralizer
Bow Spring Centralizers are critical tools used in the oil and gas industry to maintain the central position of casing within a wellbore during cementing operations. Their unique design, resembling a bow, allows for effective stabilization of the casing, ensuring uniform annular clearance and minimizing friction while running casing.
Features
- Enhanced Restoring Force: Provides greater restoring force compared to non-welded centralizers.
- Welded Bows: Bow springs are securely welded to the end collars using low hydrogen coated electrodes under controlled conditions.
- Hinged Design: Facilitates easy transportation, storage, and installation.
- Reinforced End Collars: End collars feature a stamped reinforcing rib for maximum structural integrity.
- Adjustable Heights: Bow spring heights can be adjusted to meet specific application needs.
- Size Range: Available in sizes from 4-1/2″ to 20″, with custom sizes upon request.
Performance
This centralizer meets API 10D standards, ensuring reliability and efficiency. The combination of high restoring force and low starting force enhances ease of installation while maintaining casing integrity, making it an ideal choice for vertical and slightly deviated well applications.
| Popular Specifications of Bow Spring Centralizers | ||||
| Size (inch) | Bow Quantity | Outside Diameter | Inner Diameter | Overall Length |
| 4-1/2″ × 6″ | 4 | 160 | 116 | 450/575 |
| 4-1/2″ × 6-1/4″ | 4 | 167 | 116 | 450/575 |
| 4-1/2″ × 7-7/8″ | 4 | 210 | 116 | 450/575 |
| 4-1/2″ × 8-1/2″ | 4 | 230 | 116 | 450/575 |
| 5″ × 6″ | 4 | 160 | 128 | 450/540 |
| 6″ × 6-3/4″ | 4 | 180 | 128 | 450/575 |
| 5″ × 7-7/8″ | 4 | 210 | 128 | 450/575 |
| 5-1/2″ × 7-7/8″ | 5 | 210 | 140 | 450/575 |
| 5-1/2″ × 8-1/2″ | 5 | 216/245 | 140 | 450/575 |
| 5-1/2″ × 8-3/4″ | 5 | 222/250 | 140 | 450/575 |
| 5-1/2″ × 9-7/8″ | 5 | 251/264 | 140 | 450/575 |
| 5-1/2″ × 9-1/2″ | 5 | 242/264 | 140 | 450/575 |
| 7″ × 8-1/2″ | 6 | 216/230 | 179 | 450/575 |
| 7″ × 8-3/4″ | 6 | 222/233 | 179 | 450/575 |
| 7″ × 9-1/2″ | 6 | 242/264 | 179 | 450/575 |
| 7″ × 9-7/8″ | 6 | 251/264 | 179 | 550/650 |
| 9-5/8″ × 12-1/4″ | 8 | 346 | 245 | 550/650 |
| 9-5/8″ × 13-3/8″ | 8 | 346/352 | 245 | 550/650 |
| 9-5/8″ × 12-13/16″ | 8 | 378 | 245 | 550/650 |
| 10-3/4″ × 14-3/4″ | 9 | 405 | 275 | 550/650 |
| 10-3/4″ × 15-1/2″ | 9 | 374 | 275 | 550/650 |
| 13-3/8″ × 17-1/2″ | 10 | 440/466 | 342 | 550/650 |
| 13-5/8″ × 17-1/2″ | 12 | 440/466 | 342 | 550/650 |
| 20″ × 26″ | 12 | 696 | 510 | 550/610/650 |
