DYNAPAC

 

 
 

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.

 

 

 


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