Bow-spring centralizer
Application
Steel bow-spring centralizers are designed for reliable centering of casing and liners while its running into the vertical, deviated and horizontal wells.
Centralizers provide uniform gap between the casing and the borehole wall, which improves the quality of the cementing of the main column and prevents screens damage during the running into downhole.
Benefits
- Rigid undismountable design
- Minimum value of the axial force while pushing the centralizer
- The optimal value of the radial centering force
- High dimensional accuracy
- Uniform strength design providing accident-free application
- Quick and easy installation
Size | 114/144 | 168/216 | 245/295 | 324/394 | 426/508 |
---|---|---|---|---|---|
Casing size, mm | 114 | 168 | 245 | 324 | 426 |
Well bore diameter, mm |
144 | 216 | 295 | 394 | 508 |
Interior diameter, mm |
117,5 +3,2 -0,000 |
168,3 +3,2 -0,000 |
247,7 +3,2 -0,000 |
327 +3,2 -0,000 |
430,2 +3,2 -0,000 |
Outer diameter min, mm |
147,3 | 198,1 | 279,4 | 355,6 | 457,2 |
Outer diameter max, mm |
159,4 +0,000 -6,35 |
222,3 +0,000 -6,35 |
302,8 +0,000 -6,35 |
401,2 +0,000 -6,35 |
514,4 +0,000 -6,35 |
Total lenth, mm (±1,3 mm) |
457 | 457 | 457 | 457 | 457 |
Maximum pushing force, kg |
204 | 408 | 635 | 907 | 1089 |
Minimum radial restoring force, kg |
435 | 817 | 907 | 726 | 817 |
Quality standard | API 10D | API 10D | API 10D | API 10D | API 10D |
Structure type | Welded | Welded | Welded | Welded | Welded |
Number of bows | 4 | 6 | 6 | 8 | 8 |
Ring type | Single part/ Split body |
Single part/ Split body |
Single part/ Split body |
Single part/ Split body |
Single part/ Split body |