XAN-STAR D
XAN-STAR D is a biopolymer used for increasing viscosity in water-base systems. Small additions provide viscosity and weight-material suspension for all water-base mud systems. XAN-STAR D has the unique ability to produce a fluid that is highly shear-thinning (LSRV).
Application
XAN-STAR D effectively increases viscosity for cuttings transport and suspension in all water base fluids, from highly weighted to low-solids systems, and including freshwater, seawater, salt and heavy-brine systems. Shear-thinning fluids containing XAN-STAR D have low effective viscosities at the high shear rates encountered inside the drill string and at the bit. This low effective viscosity results in minimal pressure losses and standpipe pressures allows optimized hydraulics and maximized rates of penetration. Conversely, at the low shear rates experienced in the annulus, XAN-STAR D enables the drilling fluid to have a high effective viscosity for adequately cleaning the well and suspending cuttings.
Advantages
- Highly effective low shear rate viscosifier for improved hydraulics and power at the bit for maximum penetration rates
Typical Usages
| Typical Amounts of XAN-STAR D Added to freshwater | ||
|---|---|---|
| XAN-STAR D should be added slowly through the hopper to prevent lumping and minimize waste. It should be added at the rate of approximately 2 lb (0.91 kg) every 2 min. The time required for the product to yield its ultimate viscosity depends on salinity, temperature and shear | ||
| Drilling Application | lb/100 gal | lb/bbl |
| For most mud systems | 0.6 - 4.75 | 0.25 - 2 |
| Special fluids and difficult hole-cleaning conditions | 9.5 | 4 |
Typical Properties
| Physical Appearance | Cream to tan powder |
|---|---|
| Specific Gravity | 1.5 |
Packaging
XAN-STAR D is packaged in 25lb, multi-wall sacks with 80/plt and 25lb bkts with 48/plt