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Download Equipment- High Pressure Viscometer
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FLOQUIP™ Equipment FLOQUIP HPV High Pressure Viscometer Monitoring the viscosity is a key parameter of polymer solution injection during a polymer flood. In order to fulfill customer demands of product consistency and quality, viscosity measurement is requested. Viscosity is the resistance to flow. Numerous technologies have been developed and used to measure the resistance. Those are spindle-rotation, vibrating, acoustic, falling ball, and glass capillaries to name a few. These methods simply give index rather than measuring the true viscosity for non-Newtonian liquids like polymer solutions for which viscosity changes with flow rate. This is mainly because most of these technologies are designed for simple Newtonian liquids. The FLOQUIP HPV 20 is the viscometer For a newtonian fluid that measures true viscosity. Its measure8•v or ment principle is based on pressure drop 8•v or = = D4•Q = measurement of a flow in a pipe : the prinπ• R 3 D ciple is well described in numerous rheo4 •Q 8•v or = logy books (ie: Fluid flow for = Chemical 3 •R D For a power lawπfluid Enginners, from A. Holland,R. Bragg). Liquid flow through the pipe generates resistance, which in turns generates pressure drop. By 8•v •(3n+1) measuring the pressure drop at a known or = Q •(3n 8•v •(3n+1) or flow rate, viscosity is calculated. 4n D = = D Shear rate determination the key point 8•v is(3n+1) = viscosity• of a non Newfor measuring the 4n D tonian fluid. From the literature, the calculation in a pipe is as follows, where v is the velocity of fluid in meters/second Q is the flow rate in m3/ second Limited shear rate accessibility from these D is the diameter of the pipe in meters viscometers makes it impossible to cha- n consistency index from the power law racterize properly the liquid flow behavior model. under high pressure during fast processes such as polymer flooding. or 4n Q •(3n+1) = n π•R3 From a rotational viscometer the viscosity profile versus shear rate of the polymer solution is determined, so that can be compared with the pressure drop given by the FLOQUIP HPV 20 viscometer. A direct relationship gives the true viscosity of the fluid solution flowing in the pipe. Correlation Between Pressure Drop and Viscosity Pressure Drop, mbar 1200 FLOPAM FP 3630 S 20°C, Pipe Ø = 10.22 mm, L = 20 m Brine NaCl 30,000ppm, CaCl2,2H2O 3,000ppm Brine NaCl 10,000ppm Brine NaCl 1,000 ppm FP 3330 S, Brine NaCl 10,000ppm 1000 800 600 400 200 0 0 0.05 0.10 π•R3 0.15 Viscosity at local shear rate in Pa•s n