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OPTA-ZAN
نویسنده : رضا سپهوند - ساعت ۱٢:۳٦ ‎ب.ظ روز ۱۳٩٤/٧/٥
 

OPTA-ZAN Product Data Sheet
5th Floor, Wisma Chase Perdana, Off Jalan Semantan, Damansara Heights,
50490 Kuala Lumpur, Malaysia. Telephone: 603-2080-5080 / 7490-5080
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OPTA-ZAN is a high purity xanthan gum specifically formulated to be used in the OPTA-FLO - DRILL-IN fluid as a viscosifier. Small quantities provide viscosity and weight material suspension for all water-based drilling fluids systems. OPTA-ZAN has the unique ability to produce a fluid that is highly shear-thinning and develops a true gel structure.
COMMON NAME
Clarified Xanthan Gum
CHEMICAL FORMULA
Proprietary
APPEARANCE
Powder
SOLUBILITY IN WATER
Soluble
COLOUR
Cream to tan
SPECIFIC GRAVITY
1.5 -1.7
OPTA-ZAN is used to increase viscosity for cuttings transport and suspension. It provides an optimized rheology profile with elevated low-shear-rate viscosity (LSRV) and shear thinning characteristics with low “n” values which results in fluids with inverted flow properties, low effective viscosity for minimal pressure losses and standpipe pressure allows optimum hydraulics and maximized rates of penetration. Conversely, at the low-shear-rate experienced in the annulus, OPTA-ZAN enables the fluid to have a high effective viscosity for adequately cleaning the well and suspend cuttings.
As a clarified product OPTA-ZAN minimises formation damage.
􀂾 Highly effective viscosifier.
􀂾 Provides shear-thinning rheology for improved hydraulics.
􀂾 Easy to mix.
􀂾 Viscous laminar flow in the annulus for improved wellbore stability with maximum hole-cleaning and suspension capacity.
􀂾 Non damaging clarified xanthan gum.
The normal application is 0.25 - 2.0 lb/bbl (0.7 - – 5.7 kg/m3). For special applications such as high viscosity pills for hole cleaning sweeps up to 4 lb/bbl (11.4 kg/m3)may be required.
􀂾 Effective up to 275 0F (135 0C). Above this temperature include oxygen scavengers in the formulation.
􀂾 Efficacy is reduced in high salinity environments.
􀂾 Needs shear and temperature to fully yield.
Consult MSDS before use and use personal protective equipment as advised.
OPTA-ZAN is packaged in 25 kg (55 lb) or 50 lb (22.7 kg) multi-wall, paper sacks. Store in a dry location away from sources of heat or ignition.