Viscometer apparatus and method
US4878377A · kind A · utility
12Cited by
7References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1988 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Oct 7, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N11/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotary viscometer includes a rotor member having plural helically staggered mixing blades disposed on the outer surface thereof for thoroughly mixing a quantity of fluid whose viscosity is being measuring during rotation of the rotor member. The viscometer has a relatively large annular space between the rotor member and a stationary bob member, and the viscosity of hydraulic fracturing fluids for earth formations, in particular, of a type which exhibit increased viscosity at elevated temperatures, is measured by an improved method using the viscometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.