Alternative to the Brookfield PVS
Summary. These two sit in different pressure classes. The Brookfield PVS is a 1000 psi instrument with low temperature down to -40 C and a very high viscosity range. The Coretest HPHT Rheometer is a 2000 psi / 500 F downhole HPHT unit. For the higher 2000 psi class the Coretest unit is an alternative; for low-temperature or very-high-viscosity work at lower pressure, the PVS is the right tool.
The HPHT class at a glance
| Coretest HPHT | Grace M5600 | Chandler 5550 | Brookfield PVS | |
|---|---|---|---|---|
| Pressure | 2000 psi | 2000 psi | 2000 psi | 1000 psi |
| Max temp | 500 F | 500 F | 500 F | -40 to 260 C |
| Min shear rate | 0.00004 s-1 | 0.00004 s-1 | 0.17 s-1 | 0.2 s-1 |
| Shear stress | to 15000 | to 15000 | to 4900 | n/p |
| Oscillatory | In dev | Yes | No | No |
| Maturity | Prototype | Field-proven | Field-proven | Field-proven |
How the Coretest HPHT Rheometer compares
| Coretest HPHT Rheometer | Brookfield PVS | |
|---|---|---|
| Max pressure | 2000 psi | 1000 psi |
| Temperature | -7 to 260 C (500 F) | -40 to 260 C |
| Min shear rate | 0.00004 s-1 | 0.2 s-1 |
| Viscosity range | 0.5 to 5,000,000 cP | 0.5 to 36,000,000 cP (bob-dependent) |
| Geometry | Concentric-cylinder Couette | Coaxial, rotating outer cylinder |
| Wetted material | Hastelloy C276 | Hastelloy (cups and bobs) |
| Class | Downhole HPHT (2000 psi) | Lower-pressure, wide-viscosity |
Who each is for
Coretest HPHT Rheometer
2000 psi downhole HPHT work, low-shear / gel strength, 500 F. Prototype; series unit ~6-8 months from order, with FAT, extended warranty, free software updates.
2000 psi downhole HPHT work, low-shear / gel strength, 500 F. Prototype; series unit ~6-8 months from order, with FAT, extended warranty, free software updates.
Brookfield PVS
Lower-pressure (1000 psi) work, low temperature to -40 C, or very high viscosity. Field-proven in its own class.
Lower-pressure (1000 psi) work, low temperature to -40 C, or very high viscosity. Field-proven in its own class.
Need the 2000 psi HPHT class?
See how the Coretest unit maps to your test methods.
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Trademark notice: Chandler, Grace (Grace Instrument), Brookfield and the model names referenced on this page are trademarks of their respective owners. Coretest is not affiliated with, authorized, endorsed by, or sponsored by these companies. All comparisons are based on each manufacturer’s published specifications as of the date shown and are provided for engineering evaluation only. Specifications are subject to change; verify current data with each vendor before purchase.
