01 / 04Polished rods for the surface end of a sucker-rod string, supplied in conventional and spray-welded versions for stable reciprocating transmission through the stuffing box.
| Parameter | Specification |
|---|---|
| Applicable standards | SY/T 5029-2013; API Spec 11B |
| Material | 30CrMoA |
| Nominal diameters | 25, 28, 32 and 38 mm |
| Mechanical grades | D and H |
| Fatigue reference | ≥1 × 106 cycles, as specified in the supplied catalogue |
The supplied catalogue specifies 30CrMoA alloy steel, with mechanical properties selected for D- or H-grade service.
Manufacturing includes end upsetting, heat treatment and CNC machining. Conventional and spray-welded polished surfaces are available.
Surface polished-rod service in beam-pumping systems and compatible sucker-rod strings.
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