The bow spring centralizer is mainly used for primary cementing and is suitable for vertical, deviated and horizontal Wells, where low start force is high resilience.
Work Principle
The proper use of casing centralizer during well completion can play the following roles: reduce casing resistance and make casing run smoothly to the designed position; Centering the casing in the well; Reduce the sticking phenomenon, so as to balance the hydrostatic pressure in the annular space; It is beneficial to improve cementing quality by reducing the number of slots and improving the efficiency of mud displacement. The resetting force of the two-bow centralizer is higher than that of the single-bow centralizer, and the centralizing performance is better than that of the single-bow centralizer.
Technical Parameters
| Type | OD (mm) | ID (mm) | Height (mm) | Max starting force (N) | Min reset force (N) | Connection |
|---|---|---|---|---|---|---|
| 5-1/2″×8-1/2″ | 245±5 | 142~148 | 530±50 | 2758 | 2785 | Hinge connection |
| 7″×8-1/2″ | 245±5 | 181~186 | 530±50 | 4626 | 4626 | Hinge connection |
| 9-5/8″×12-1/4″ | 335±5 | 250~255 | 530±50 | 7117 | 7117 | Hinge connection |
| 13-3/8″×17-1/2″ | 490±5 | 342~347 | 530±50 | 10853 | 5427 | Hinge connection |
Characteristics
- Designed and manufactured in accordance with API spec.10D standard, using domestic advanced technology, it has the advantages of reasonable design, flexible opening and closing, simple installation, low starting power and high reset force.
- The main parts of the product, spring blade is made of high quality manganese steel after heat treatment after good mechanical properties.
- The blades are made of 20# hot rolled steel strip and the pins are made of high strength alloy.