BAKER HUGHES - Drilling Fluids Reference Manual

Oil / Synthetic Fluids
OMNI-TROL / CARBO-TROL ® A-9
OMNI-TROL / CARBO-TROL ® A-9 are temperature-stable organophilic lignites used to control
filtration in oil- and synthetic-base fluid systems. Both provide non-asphaltic filtration control in the
CARBO-DRILL/SYN-TEQ family of oil/synthetic fluids. OMNI-TROL / CARBO-TROL A-9 are
readily dispersible in all oil and synthetic-base fluids, reduce filtration in oil/synthetic drilling fluids,
and stabilize water-in-oil emulsions at temperatures not exceeding 350° F (177° C).
Treatment levels of OMNI-TROL / CARBO-TROL A-9 will vary depending on the type of
oil/synthetic fluid used, bottomhole temperatures encountered, and filtration control desired.
Concentrations of 5 to 10 lb m / bbl (14.3 to 28.5 kg/m 3 ) should be adequate for most applications.
Table 5-24
Typical Physical Properties – OMNI-TROL / CARBO-TROL
Appearance
Black powder
Hygroscopic
pH in H 2 O
Slightly
Neutral
6-UP
Bulk Density 48 lbm/ft 3 (768 kg/m 3 )
6-UP is a 100% active liquid rheology modifier. It is used to increase low-shear rheology in all oilbase
fluid systems and is effective in improving the 3 rpm and 6 rpm readings of an oil-base fluid
without causing an increase in plastic viscosity. 6-UP is compatible with both sodium and calcium
chloride internal phases and functions in fluids with oil/water ratios ranging from 40/60 to 90/10. 6-
UP is thermally stable at temperatures up to 300° F (149° C) and functions under conditions of both
high and low shear.
6-UP can be added directly to the active fluid system, but should be added as the last ingredient (when
mixing at the rig site) to achieve full affect. Mix the fluid as normal. Add the 6-UP only after the
emulsion has formed and the barite has been fully wetted.
Treatment levels are typically in the range of 0.1 to 0.4 gal/bbl (2 to 10 L/m 3 ). The final treatment
level depends on fluid weight, oil/water ratio, and the level of increase required for the 6 rpm reading.
High fluid weights and low oil/water ratios require the smallest treatment levels.
Table 5-25
Appearance
Typical Physical Properties – 6-UP
Pale, yellow liquid
Flash Point 210° F (99° C)
Pour Point > 32° F (0° C)
Density
0.99 g/mL
Baker Hughes Drilling Fluids
Reference Manual
5-42 Revised 2006