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.
| lmperial Data Figures | VS415 | VS475-17 | VS475-21 | VS675LF | VS675HF |
|---|---|---|---|---|---|
| Basic Parametres and Dimensions | |||||
| Housing OD max (A) (in) | 4,17 | 4,88 | 4,88 | 7,00 | 7,00 |
| Total length (B) (in) | 300 | 288 | 288 | 307 | 307 |
| Distance between thrust ends (in) | 297 | 284 | 284 | 303 | 303 |
| Weight(lb) | 705 | 1 021 | 1 021 | 2 205 | 2 205 |
| Connection thread: | |||||
| – top | NC31 | NC38 | NC38 | NC50 | NC50 |
| – bottom | Nc316 | NC38 | NC38 | NC50 | NC50 |
| Make-up torque (ft-lbs) | 600 – 7375 | 9600 – 11060 | 9600 – 11060 | 18400 – 19900 | 18400 – 19900 |
| Purpose indicators | |||||
| Flow rate (gpm) | 95 – 190 | 158 – 270 | 158 – 333 | 440 – 600 | 600 – 900 |
| Operating fluid parameters: | |||||
| – drilling mud or water density, max ( lb/ft3) | 124,9 | 124,9 | 124,9 | 124,9 | 124,9 |
| – sand content, no more than (%) | 2 | 2 | 2 | 2 | 2 |
| – the size of the pumped LCM, no more than (in) |
0.35 | 0.35 | 0.35 | 0.35 | 0.35 |
| Max. working temperature (°F) | 230 | 230 | 230 | 230 | 230 |
| Pressure drop (psi) | 435 | 435 | 435 | 435 | 435 |
| Oscillation frequency at a flow rate of 143 gpm (9 l/s) (Hz) | 14 – 15 | 18 – 19 | 16 – 17 | 16 – 17 | 13 – 19 |
| Oscillation amplitude (in) | 0.04-0.16 | 0.04 – 0.12 | 0.04 – 0.12 | 0.04 – 0.16 | 0.04 – 0.16 |
| Operating axial load (lbs) | 22 500 | 56 200 | 56 200 | 56 200 | 56 200 |
| Strength specifications | |||||
| Maximum tensile load (lbs) | 281 000 | 341 700 | 341 700 | 719 400 | 719 400 |
| Maximum compression load (lbs) | 56 202 | 89 900 | 89 900 | 101 160 | 101 160 |
| Maximum torque (ft-lbs) | 8 850 | 17 000 | 17 000 | 36 140 | 36 140 |
| Metric Data Figures | VS415 | VS475-17 | VS475-21 | VS675LF | VS675HF |
|---|---|---|---|---|---|
| Basic Parametres and Dimensions | |||||
| Housing OD max (A) (mm) | 106 | 124 | 124 | 178 | 178 |
| Total length (B) (mm) | 7 634 | 7 310 | 7 310 | 7 800 | 7 800 |
| Distance between thrust ends (mm) | 7 545 | 7 208 | 7 208 | 7 686 | 7686 |
| Weight (kg) | 320 | 463 | 463 | 1 000 | 1000 |
| Connection thread: | |||||
| – top | NC31 | NC38 | NC38 | NC50 | NC50 |
| – bottom | NC31 | NC38 | NC38 | NC50 | NC50 |
| Make-up torque (kN-m) | 9 – 10 | 13 – 15 | 13 – 15 | 25 – 27 | 25 – 27 |
| Purpose indecators: | |||||
| Flow rate (l/s) | 6 — 12 | 10 — 17 | 10 — 21 | 28 — 38 | 38 — 57 |
| Operating fluid parameters: | |||||
| – drilling mud or water density, max ( kg/m3) | 2×103 | 2×103 | 2×103 | 2×103 | 2×103 |
| – sand content, no more than (%) | 2 | 2 | 2 | 2 | 2 |
| – the size of the pumped LCM, | 9 | 9 | 9 | 9 | 9 |
| no more than (mm) | 110 | 110 | 110 | 110 | 110 |
| Max. working temperature (°C) | 3 | 3 | 3 | 3 | 3 |
| Pressure drop (Mpa) | 14 – 15 | 18 – 19 | 16 – 17 | 16 – 17 | 13 – 19 |
| Oscillation frequency at a flow rate of 143 gpm (9 l/s) (Hz) | 1-4 | 1 – 3 | 1 – 3 | 1 – 4 | 1 – 4 |
| Oscillation amplitude (mm) | 100 | 250 | 250 | 250 | 250 |
| Operating axial load (kg) | |||||
| Strength specifications | |||||
| Maximum tensile load (kN) | 1 250 | 1 520 | 1 520 | 3 200 | 3 200 |
| Maximum compression load (kN) | 250 | 400 | 400 | 450 | 450 |
| Maximum torque (kN m) | 12 | 23 | 23 | 49 | 49 |
