Download Equipment- High Pressure Viscometer

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