The coupling is designed to connect sucker rod, pony rod, sinker bar and polished rod, and it is the key part to combine the sucker rod string, and both ends are box threads. We can manufacture and supply sucker rod coupling, polished rod coupling and Sub-coupling (X-over coupling), and the class includes class T, class SM and class HS as per API 11B Specification. We researched and designed the class HS coupling, which is high strength and more efficient to connect other parts in the sucker rod string.
| Full Size Coupling | |||||
| Size(in) | Coupling O.D W(mm) (+0.13,-0.25) | Length L(mm) (+1.57,-0.00) | Thread D.(in) | Length of Wrench Square (mm) | Hardness (HRA) |
| 5/8" | 38.10 | 101.6 | 15/16" | 31.8 | 56-62 |
| 3/4" | 41.28 | 1-1/16" | |||
| 7/8" | 46.00 | 1-3/16" | |||
| 1" | 55.60 | 1-3/8" | 38.1 | ||
| 1 1/8" | 60.33 | 114.3 | 1-9/16" | ||
| Note: Customers can determine whether every coupling is with Wrench Flat or not . | |||||
| Slim Hole Coupling | |||||
| Size(in) | Coupling O.D W(mm) (+0.13,-0.25) | Length L(mm) (+1.57,-0.00) | Thread D.(in) | Length of Wrench Square (mm) | Hardness (HRA) |
| 5/8" | 31.75 | 101.6 | 15/16" | 31.8 | 56-62 |
| 3/4" | 38.10 | 1-1/16" | |||
| 7/8" | 41.30 | 1-3/16" | |||
| 1" | 50.80 | 1-3/8" | 38.1 | ||
| Note: Customers can determine whether every coupling is with Wrench Flat or not . | |||||
| Full Size Sub-coupling | |||||
| Size(in) | Coupling O.D W(mm) (+0.13,-0.25) | Length L(mm) (+1.57,-0.00) | Small End Thread D. | Big End Thread D. | Hardness (HRA) |
| 5/8"-3/4" | 41.28 | 101.6 | 15/16" | 1-1/16" | 56-62 |
| 3/4"-7/8" | 46.00 | 1-1/16" | 1-3/16" | ||
| 7/8"-1" | 55.60 | 114.3 | 1-3/16" | 1-3/8" | |
| 1"-1 1/8" | 60.33 | 127.0 | 1-3/8" | 1-9/16" | |
| Slim Hole Sub-coupling | |||||
| Size(in) | Coupling O.D W(mm) (+0.13,-0.25) | Length L(mm) (+1.57,-0.00) | Small End Thread D. | Big End Thread D. | Hardness (HRA) |
| 5/8"-3/4" | 38.10 | 101.6 | 15/16" | 1-1/16" | 56-62 |
| 3/4"-7/8" | 41.30 | 1-1/16" | 1-3/16" | ||
| 7/8"-1" | 50.80 | 114.3 | 1-3/16" | 1-3/8" | |
| Full Size Polished Coupling | |||||
| Size(in) | Coupling O.D W(mm) (+0.13,-0.25) | Length L(mm) (+1.57,-0.00) | Thread D.(in) | Vanish Cone | Hardness (HRA) |
| 5/8" | 38.10 | 101.6 | 15/16" | 9O | 56-62 |
| 3/4" | 41.28 | 1-1/16" | |||
| 7/8" | 46.00 | 1-3/16" | |||
| 1" | 55.60 | 1-3/8" | |||
| 1-1/8" | 60.33 | 114.3 | 1-9/16" | ||
| Slim Hole Polished Coupling | |||||
| Size(in) | Coupling O.D W(mm) (+0.13,-0.25) | Length L(mm) (+1.57,-0.00) | Thread D.(in) | Vanish Cone | Hardness (HRA) |
| 5/8" | 31.75 | 101.6 | 15/16" | 9 Degree | 56-62 |
| 3/4" | 38.10 | 1-1/16" | |||
| 7/8" | 41.30 | 1-3/16" | |||
| 1" | 50.80 | 1-3/8" | |||
| Coupling Mechancial Properties | |||||
| Tensile Strength Rm(Mpa) | Yield Strength Rel(Mpa) | Elongation Percentage A(%) | Reduction Percentage of Area Z(%) | ||
| ≥655 | ≥405 | ≥16 | ≥48 | ||
