SDT-VS oscillator is installed in the drill string assembly and is designed to reduce the BHA friction against the borehole walls.
Since the oscillations are low magnitude and only affect the longitudinal axis of your drill string, SDT-VS does not cause the harmful lateral vibrations that can damage downhole tools.
The Oscillator system is compatible with all MWD systems.
Total pressure drop of 300-400 psi on the Oscillator Tools allows to maintain higher flow rates on rigs, with limited pump pressure capacity.
| 4.17 | 4.88 | 4.88 | 5.24 | 5.24 | 7.00 | 7.00 |
| 300 | 288 | 288 | 289 | 289 | 307 | 307 |
| 737 | 1 025 | 1 025 | 1 058 | 1 058 | 2 205 | 2 205 |
| NC31 | NC38 | NC38 | NC40 | NC40 | NC50 | NC50 |
| 6 600-7 375 | 9 600-11 060 | 9 600-11 060 | 11 100-12 540 | 11 100-12 540 | 32 450-38 350 | 32 450-38 350 |
| 95-190 | 158-270 | 237-333 | 158-285 | 237-333 | 396-600 | 600-900 |
| 16.7 | 16.7 | 16.7 | 16.7 | 16.7 | 16.7 | 16.7 |
| 2% | 2% | 2% | 2% | 2% | 2% | 2% |
| 0.35 | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 |
| 230 | 230 | 230 | 230 | 230 | 230 | 230 |
| 435 | 435 | 435 | 435 | 435 | 435 | 435 |
| 14-15 Hz @ 142 | 18-19 Hz @ 248 | 16-17 Hz @ 248 | 18-19 Hz @ 237 | 16-17 Hz @ 237 | 16-17 Hz @ 500 | 13-19 Hz @ 600-900 |
| 0.04-0.16 | 0.04-0.12 | 0.04-0.12 | 0.04-0.12 | 0.04-0.12 | 0.04-0.16 | 0.04-0.16 |
| 0.43 | 0.33 | 0.29 | 0.33 | 0.29 | 0.11 | 0.11 |
| 281 000 | 341 700 | 341 700 | 480 000 | 480 000 | 719 400 | 719 400 |
| 56 202 | 89 900 | 89 900 | 101 160 | 101 160 | 101 160 | 101 160 |
| 8 850 | 17 000 | 17 000 | 20 650 | 20 650 | 36 140 | 36 140 |
| 8.29 | 11.03 | 11.03 | 11.79 | 11.79 | 19.62 | 19.62 |
| Metric | SDT-VS415 | SDT-VS475LF | SDT-VS475HF | SDT-VS525LF | SDT-VS525HF | SDT-VS675LF | SDT-VS675HF |
| Basic Parameters and Dimensions | |||||||
| Housing OD max, mm | 106 | 124 | 124 | 133 | 133 | 178 | 178 |
| Total length, mm | 7 634 | 7 310 | 7 310 | 7 344 | 7 344 | 7 800 | 7 800 |
| Weight, kg | 334 | 465 | 465 | 480 | 480 | 1 000 | 1 000 |
| Connection thread | NC31 | NC38 | NC38 | NC40 | NC40 | NC50 | NC50 |
| Make-up torque, kN·m | 9-10 | 13-15 | 13-15 | 15-17 | 15-17 | 44-52 | 44-52 |
| Operating Parameters | |||||||
| Flow rate, kN·m | 6-12 | 10-17 | 15-21 | 10-18 | 15-21 | 25-38 | 38-58 |
| Mud density max, kg/m³ | 2 000 | 2 000 | 2 000 | 2 000 | 2 000 | 2 000 | 2 000 |
| Sand content | 2% | 2% | 2% | 2% | 2% | 2% | 2% |
| LCM size max, mm | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Max temperature, °C | 110 | 110 | 110 | 110 | 110 | 110 | 110 |
| Pressure drop, Mpa | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Operating frequency, l/s | 14-15 Hz @ 9 | 18-19 Hz @ 15.7 | 16-17 Hz @ 15.7 | 18-19 Hz @ 15 | 16-17 Hz @ 15 | 16-17 Hz @ 31.5 | 13-19 Hz @ 37.8-58 |
| Oscillation amplitude, mm | 1-4 | 1-3 | 1-3 | 1-3 | 1-3 | 1-4 | 1-4 |
| Pulsation coefficient, l/s | 1.62 | 1.23 | 1.10 | 1.23 | 1.10 | 0.43 | 0.42 |
| Strength Specifications | |||||||
| Maximum tensile load, kN | 1 250 | 1 520 | 1 520 | 2 136 | 2 136 | 3 200 | 3 200 |
| Maximum compression load, kN | 250 | 400 | 400 | 450 | 450 | 450 | 450 |
| Maximum torque, kN·m | 12 | 23 | 23 | 28 | 28 | 49 | 49 |
| Pump opening area, mm² | 5 350 | 7 121 | 7 121 | 7 605 | 7 605 | 12 661 | 12 661 |
