API Spec 11B Sucker Rod
- Grade: C, D, K, KD, HL, HY
- Connection: API Standard Connections, Slim Hole Connections, Specialty Connections
- Size: 5/8″ (15.875 mm), 3/4″ (19.050 mm), 7/8″ (22.225 mm), 1″ (25.400 mm), and 1 1/8″ (28.575 mm)
- Length: 25 feet (7.62 meters), 30 feet (9.14 meters), and 37.5 feet (11.43 meters)
API Spec 11B Sucker Rod
API Spec 11B Sucker Rods are vital components in the oil and gas industry, designed to enhance the efficiency and reliability of pumping systems. Complying with the stringent standards of API Spec 11B, these sucker rods are manufactured to ensure superior strength, durability, and corrosion resistance. Used extensively in rod pumping applications, they facilitate the efficient transfer of mechanical energy from the surface to downhole pumps. Choosing API Spec 11B Sucker Rods ensures optimal performance, longevity, and safety in your oil extraction operations.
Chemical Composition of API Spec 11B Sucker Rod
| Element | Grade C | Grade D | Grade K | Grade KD | Grade HL | Grade HY |
| (C) | 0.50-0.60% | 0.38-0.43% | 0.28-0.33% | 0.28-0.33% | 0.40-0.50% | 0.23-0.28% |
| (Mn) | 0.60-0.90% | 0.75-1.00% | 1.40-1.70% | 1.40-1.70% | 0.75-1.00% | 0.60-1.00% |
| (Si) | 0.15-0.35% | 0.20-0.35% | 0.15-0.35% | 0.15-0.35% | 0.20-0.35% | 0.20-0.35% |
| (S) | ≤0.045% | ≤0.040% | ≤0.035% | ≤0.035% | ≤0.030% | ≤0.030% |
| (P) | ≤0.045% | ≤0.030% | ≤0.030% | ≤0.030% | ≤0.030% | ≤0.030% |
| (Cr) | – | – | 0.50-0.80% | 0.50-0.80% | 0.80-1.10% | 0.70-1.00% |
| (Ni) | – | – | 0.40-0.70% | 0.40-0.70% | 0.80-1.10% | 0.40-0.70% |
| (Mo) | – | – | 0.15-0.25% | 0.15-0.25% | 0.20-0.30% | 0.15-0.25% |
Mechanical Properties of API Spec 11B Sucker Rod
| Steel Grade | Tensile Strength | Yield Strength | Elongation | Contraction Percentage of Area | Impact Toughness |
| (Mpa) | (Mpa) | (%) | (%) | (J/cm2) | |
| C | 620-793 | ≧414 | ≧12 | ≧55 | ≧70 |
| K | 620-793 | ≧414 | ≧12 | ≧55 | ≧70 |
| D | 794-965 | ≧586 | ≧10 | ≧50 | ≧58.8 |
| KD | 794-965 | ≧586 | ≧10 | ≧50 | / |
| HL | 965-1195 | ≧795 | ≧10 | ≧50 | / |
| HY | 965-1195 | ≧795 | / | / | / |
Specifications of API Spec 11B Sucker Rod
| Parameter | Specification |
| Standard | API SPEC 11B Sucker Rod |
| Grade | C, K, D, KD, HL, HY, U |
| Diameter | 5/8 inch (15.88 mm), 3/4 inch (19.05 mm), 7/8 inch (22.23 mm), 1 inch (25.40 mm), 1 1/8 inch (28.58 mm) |
| Length | 25 ft (7.62 m), 30 ft (9.14 m), 37.5 ft (11.43 m) |
| Surface Finish/Coating | Polished, optional coatings such as Zinc or other protective coatings for corrosion resistance |
| Color Coding | Typically color-coded at the ends according to the grade for easy identification: Grade C: Yellow Grade K: Green Grade D: Blue Grade KD: Red Grade HL: Orange Grade HY: White Grade U: Black |
| Heat Treatment | Grade C: Normalized Grade K: Normalized Grade D: Quenched and tempered Grade KD: Quenched and tempered Grade HL: Quenched and tempered Grade HY: Quenched and tempered Grade U: Quenched and tempered |
| Thread Type | API Standard threads (e.g., pin and box connections) |
| Ends Connections | Pin and Box Connections, or Coupling Connections according to API standards |
| Packing Methods | Bundled with steel straps, ends protected with thread protectors, placed in wooden crates or steel racks for shipping |
| Transportation | Transported by truck, rail, or ship; handled with care to avoid damage during loading and unloading |
Dimension of API Spec 11B Sucker Rod
| Size | Rod Dia. | Thread Dia. | OD of Pin Shoulder | Length of Pin | Length of Wrench Square | Width of Wrench Square |
| (in.) | (mm) | (in) | (mm) | (mm) | (mm) | (mm) |
| 5/8 | 15.88 | 15/16 | 31.80 | 31.75 | ≧31.8 | 22.20 |
| 3/4 | 19.05 | 1-1/16 | 38.10 | 36.50 | 25.40 | |
| 7/8 | 22.23 | 1-3/16 | 41.30 | 41.28 | ||
| 1 | 25.4 | 1-3/8 | 50.80 | 47.63 | ≧38.1 | 33.30 |
| 1-1/8 | 28.58 | 1-9/16 | 57.20 | 53.98 | ≧41.3 | 38.10 |
Applications of API Spec 11B Sucker Rod
Oil Production Wells: Sucker rods are primarily used in the extraction of oil from wells. They transfer mechanical energy from the surface pumping unit to the downhole pump, enabling the lifting of crude oil to the surface.
Water Injection Wells: In secondary recovery methods, water injection wells use sucker rods to pump water into the oil reservoir to maintain pressure and improve oil recovery.
Gas Wells: Sucker rods can also be used in gas wells for similar purposes as in oil wells, aiding in the extraction and lifting of natural gas.
Enhanced Oil Recovery (EOR): In enhanced oil recovery techniques, sucker rods are used to pump various fluids, such as steam, chemicals, or CO2, into the reservoir to increase oil production.
Coalbed Methane Production: Sucker rods are utilized in coalbed methane (CBM) wells to extract methane gas from coal seams by pumping out water and reducing the pressure in the coal seam.
Geothermal Wells: In geothermal energy extraction, sucker rods can be used in pumping hot water or steam from deep underground reservoirs to the surface for power generation.
Agricultural Irrigation: Sucker rods are also employed in agricultural applications for pumping water from deep wells for irrigation purposes.
Mining Operations: In mining operations, sucker rods are used to dewater mines, ensuring a dry working environment and facilitating the extraction of minerals.
