DISPERSIBLE GRADE DESCRIPTION:
Dynazan
polymer is dispersible grade xanthan gum in oildrilling application.
It is a high molecular weight xanthan biopolymer used for rheology
control in water based mud systems. It can be prevent fish-eye while
application in mud system.
PROPERTIES:
Appearance
|
cream
colored powder |
Bulk
density |
approx.
550-700kg/m3 |
Moisture |
max.
13% |
pH(1%
solution) |
6.0------8.0 |
Particle
size |
100%
pass 28 mesh Min.95% pass 42 mesh |
Temperature
stability |
120------150dC
/ 248-----302dF |
Solubility
|
easily
soluble in fresh / salt water |
Yield
point |
min
8 (1lb/bbl in seawater by FANN 35) |
APPLICATION:
Dynazan
polymer's primary function is to provide effective viscosity for
solids transport and solids suspension with a sufficient dispersiblility.
It will enable optimum rheology control through superior low shear
rate viscosity which is highly shear thinning. Dynazan
polymer will perform effectively in all types of water-based drilling
fluids from low solids to highly weighted systems. This includes
fresh water, salt and heavy brine systems. Being a dispersible product,
Dynazan
will be easier to mix in all brine solutions.
FEATURES:
Dynazan
polymer provides the rheological properties for improved hydraulics.
This includes minimum friction pressures for additional hydraulic
horsepower at the bit for maximum penetration rates. The same rheology
promotes laminar flow in the annulus for increased bore hole stability
with maximum solids transport capacity.
MIXING:
Dynazan
polymer should be added quickly through the hopper at mediate shear
without lumps and to minimize waste. It should be added at the rate
of approximately six (6) pounds per minute (25 minutes for 150 lb
sack). Higher salinity, cold water and low shear mixing will lengthen
the time for full viscosity to be achieved.
CONCENTRATION:
The
amount of Dynazan
polymer required will depend upon the effective viscosity or friction
pressure reduction needed. When used as the primary viscosifier
in a low colloid system, 1-2 lb/bbl may be required. Higher concentrations
up to 4 lb/bbl may be used for extremely high transport requirements.
GENERAL
INFORMATION:
Chemical Name - xanthan gum CAS # : 11138-66-2 DOT Classification
- Non-hazardous Packaging: 25 kg plastic lined paper bags
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