BAKER HUGHES - Drilling Fluids Reference Manual

Baker Hughes Drilling Fluids
CARBO-TEC ®
CARBO-TEC ® is an anionic emulsifier used with lime hydrate to provide temperature-stable
emulsions of water or brines in oil. CARBO-TEC exhibits a high tolerance to contaminants and high
temperatures. CARBO-DRILL systems, prepared from CARBO-TEC, have been formulated to
withstand temperatures greater than 400°F (204°C).
CARBO-TEC is compatible with a wide range of internal phase salinities and can be used to emulsify
calcium chloride and sodium chloride brines, seawater, and freshwater. CARBO-TEC, together with
lime hydrate, will provide moderate filtration control in oil-base fluids. CARBO-TEC contains no
aromatic solvents.
CARBO-TEC is used in controlled filtration oil-base fluid systems. It requires lime to function
effectively, and is used in conjunction with CARBO-MUL HT and filtration control additives in these
systems.
CARBO-TEC controlled filtrate oil-base fluid systems will require 0.6 to 1.7 gal/bbl (14.3 to 40.5
L/m 3 ). Lime should be added as the activator at a concentration of 5 lb m lime per gallon (0.6 kg/L) of
CARBO-TEC.
CARBO-TEC functions as a passive emulsifier in CARBO-CORE systems (see Chapter 6, Reservoir
Application Fluids). Because lime and water are necessary to activate CARBO-TEC, it will have no
emulsification properties in the CARBO-CORE SM system unless water is incorporated.
Table 5-9 Typical Physical Properties – CARBO-TEC
Appearance
Dark liquid
Flash Point > 200°F ( 93°C ) (ASTM D56)
Pour Point
13°F ( 11°C)
Density 8.1 lbm/gal (964 kg/m 3 )
Baker Hughes Drilling Fluids
Reference Manual
Revised 2006 5-33