DYNAPAC
is a fluid loss control additive with secondary shale stabilization
properties. Two grades are supplied, DYNAPAC-HV with medium
to high molecular weight which is also provides viscosity, and DYNAPAC-LV
with low molecular weight which is essentially non-viscosifying.
PRODUCT DESCRIPTION
Free flow white powder.
CHEMICAL
NATURE Modified polyanionic cellulose.
PHYSICAL
AND CHEMICAL PROPERTIES
Specific Gravity: 1.6g/cm3
Water Solubility: 95%
Temperature: Stable to 150C
Moisture: 7%
pH (2% solution): 8.0 - 9.0
ITEMS
|
Quality
|
Index
|
DYNAPAC-HV
|
Yield
or salt resistance exponent
|
Fluid
loss(mV30min)
|
Fresh
Water (M3/Ton)
|
350
|
/
|
4%
NaCl Solution
|
0.61
|
7.0
|
36%
NaCl Solution
|
0.78
|
8.0
|
DYNAPAC-LV
|
|
|
Fresh
Water (M3/Ton)
|
100
|
/
|
4%
NaCl Solution
|
0.80
|
8.0
|
36%
NaCl Solution
|
0.80
|
8.0
|
APPLICATION
DYNAPAC-HV
acts as a viscosifier and gives a shear thinning fluid with a good
yield point to plastic viscosity ratio.
DYNAPAC
is used to control fluid loss in fresh or seawater systems and unlike
conventional CMC's is effective in saturated salt solutions and
magnesium brines. IT shows good resistance to calcium contamination.
DYNAPAC-LV
is particularly useful in weighted mud systems. It exerts a slight
dispersing action which helps to control gel strengths and improves
filter cake quality.
TREATMENT
DYNAPAC
must be added slowly and evenly through a hopper at a rate not faster
than 15 to 20 minutes per sack to prevent formation of large gelled
particles.
The concentration of DYNAPAC required is very dependent on
the suspended solids content due to adsorption onto the surfaces
of the particles. A typical treatment for DYNAPAC-HV is 2
to 5kg/m3 and 5 to 7kg/ m3 for DYNAPAC-LV.
TOXICITY
AND HANDLING Inhalation of DYNAPAC dust, as with any
dust producing material, should be avoided. A dust respirator and
goggles are recommended if mixing in a enclosed area. DYNAPAC is
a non-toxic, non-hazardous substance. Aquatic bioassay results are
available on request. Special precautions are not necessary for
handling, but contact with eyes should be avoided.
PACKAGING
DYNAPAC-HV or DYNAPAC-LV is packed in 25Kg multi-ply
paper sacks and within waterproof plastic film.

Copyright 2001
© Unitech Asia Pacific Limited
All rights reserved.
|