API Standard Single Bow Spring Centralizer for Casings:
1. Introduction to Casing Centralizers
Casing centralizers are essential tools used to protect sucker rods, minimizing wear and maximizing their lifespan.
2. Material Options
2.1. Super strength spring steel
2.2. ASTM A395 ductile iron or equivalent internationally recognized materials
2.3. Polyester centralizers
2.4. Aluminum alloy
3. Structure Types
3.1. Single or double bow configurations without welding
3.2. Rigid centralizers
3.3. Roller-type centralizers
4. Specifications
Casing centralizers are available in various sizes to accommodate different well sizes and casings. Some common specifications include:
- 4"×5-7/8"
- 4-1/2"×6-1/8"
- 5"×6-1/2"
- 5-1/2"×8-1/2"
- 7"×8-1/2"
- 7-5/8"×9-1/2"
- 8-5/8"×10-5/8"
- 9-5/8"×12-1/4"
- 10-3/4"×14-3/4"
- 13-3/8"×17-1/2"
- 16"×20"
- 20"×26"
These specifications cater to a range of casing sizes, ensuring compatibility and effective protection in various well applications.
Casing sentralizer specifications:
| Model (in) | Hooping In-Dia. (mm) | Hooping thickness (mm) | Total length (mm) | Max.Out-Di (mm) | Amount of spring (mm) |
| 5-1/2" x 8-1/2" | 142-148 | 3-5 | 650±50 | 225±5 | 5 |
| 7" x 9-5/8" | 181-186 | 3-5 | 650±50 | 255±5 | 6 |
| 7" x 8-1/2" | 181-186 | 3-5 | 650±50 | 235±5 | 6 |
| 8-5/8 x 12-1/4" | 223-228 | 3-5 | 650±50 | 330±5 | 8 |
| 9-5/8 x 12-1/4" | 250-255 | 3-5 | 650±50 | 330±5 | 8 |
| 10-3/4 x 12-1/4" | 274-276 | 3-5 | 650±50 | 330±5 | 9 |
| 13-3/8"x17-1/2" | 342-347 | 3-5 | 650±50 | 450±5 | 11 |
| 18-5/8"x24" | 475-477 | 3-5 | 600±50 | 610±5 | 12 |
| 20"x26" | 509-511 | 3-5 | 600±50 | 660±5 | 12 |
Company Information
Puyang Zhongshi Group Co., Ltd is a professional manufacturer of various oilfield equipments and cementing accessories since 1997, restructured enterprise of SINOPEC. Our group have 10 years export experience and 9 subsidiary factories, more than 500 employees. We are the first-class supplier of resources market of SINOPEC and CNPC.
We have the certificates of API 5CT, API 10D, API 11E, API 6A, API 11AX, ISO 9001 and ISO 14001. Our foreign customers are mainly from America, Central Asia, Russia, Southeast Asia, Middle East, etc.
