BAKER HUGHES - Drilling Fluids Reference Manual

Baker Hughes Drilling Fluids
CHEK-LOSS ® PLUS
CHEK-LOSS ® PLUS is a water-insoluble, ultra-fine, cellulosic material used for controlling seepage
and loss of circulation while drilling through depleted or under-pressured zones. CHEK-LOSS PLUS
will not preferentially water-wet when used in conjunction with oil and synthetic-based emulsion
systems. This feature minimizes the detrimental effect on the electrical stability often experienced
when using other cellulosic fibers. CHEK-LOSS PLUS can be maintained in a circulating system
without bypassing the shale shakers. CHEK-LOSS PLUS is effective in bridging micro fractured and
permeable formations to control seepage loss.
CHEK-LOSS PLUS reduces filter cake permeability and spurt losses which help prevent differential
sticking. CHEK-LOSS PLUS is nontoxic, temperature stable in excess of 204 °C (400 °F), and has
minimal effect on fluid rheology. CHEK-LOSS PLUS is functional in both water and oil mud
systems.
CHEK-LOSS PLUS can be mixed through the hopper to control seepage losses. Sufficient agitation is
necessary to properly disperse CHEK-LOSS PLUS. It can also be used as a sweep or slug in cases of
lost circulation. CHEK-LOSS PLUS can be used with HEC, starch, or other polymers in heavy brines
for sealing perforations.
The low acidity of CHEK-LOSS PLUS will require a supplemental treatment of soda ash when used
in water-based muds (add 0.2 lb/bbl soda ash with each 10 lb/bbl of CHEK-LOSS PLUS). A
concentration of 11.4 to 22.8 kg/m³ (4.0 to 8.0 lb/bbl) should be used to control seepage loss. For
application as a sweep or slug, 85.5 kg/m³ (30.0 lb/bbl) can be mixed with mud in the slugging pit and
spotted across the thief zone.
Table 5-16 Typical Physical Properties – CHEK-LOSS PLUS
Appearance
Brown powder
Hygroscopic
No
pH in H 2 O 3.5
MAGMA-GEL
MAGMA-GEL is a specialty product, wet processed organophilic clay used as a gellant/suspension
agent in the MAGMA-TEQ HTHP oil-based mud system. MAGMA-GEL is temperature stable to >
425º F (218º C). Its performance is complemented by MAGMA-TROL.
Baker Hughes Drilling Fluids
Reference Manual
Revised 2006 5-37