An all-metal hydraulic oscillator that reduces bottomhole drag and improves weight transfer to the bit. It can run with MWD, a downhole motor and conventional bit assemblies, including in high-temperature, oil-based-mud and saltwater environments.
| Model | Body OD （mm） | Tool length (mm) | Applicable flow rate (L/S） | Applicable hole size （mm) | Operating frequency (cycles/min) | Oscillation force （KN) | Amplitude （mm） | Maximum operating temperature （°C） | Connection thread |
|---|---|---|---|---|---|---|---|---|---|
| SZ127 | 127 | 2600-3000 | 12–20 | 152.4 | 600-800 | 22-30 | 3–15 | ≥200 | NC38 |
| SZ172 | 172 | 2800-3200 | 20-37 | 215.9 | 600-800 | 32-42 | 3–15 | ≥200 | NC50 |
| SZ203 | 203 | 2900-3300 | 45-60 | 311.2 | 600-800 | 45-60 | 3–15 | ≥200 | 6-5/8REG |
| Note: operating frequency and amplitude can be adjusted to customer requirements. |
| Comparison item | All-metal hydraulic oscillator | Other comparable products |
|---|---|---|
| Power assembly | Turbine | Screw |
| Power-assembly life | 300-500h | 150-200h |
| Tool length | 2.8-3.2m | ＞7m |
| Rubber components | None | Present |
| Tool service life | 150-200h | 150-200h |
| HPHT, oil-based mud and saltwater service | Generally unrestricted | Performance/life affected or unsuitable |
| Pressure drop | Low (approximately 1.5–2.5 MPa) | High (3–4 MPa) |
| Maximum operating temperature | 200°C | 150°C |
Designed for horizontal and extended-reach drilling where friction interferes with weight transfer.
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