Scavengers

UNIVERSAL offer highly effective oxide scavengers are effective at the pH levels found in most drilling fluids.

UNISCAV-HS

Function
Provides solid free H2S scrubbing for brine based drilling fluid in neutral-high pH conditions.

UNIOXAL-HS

Function
Displays a continuous H2S scavenging activity over longer time. Exhibits good temperature stability upto 150°C and intended for use in low pH conditions

UNIOS

Function
Removes dissolved oxygen from drilling and completion fluids, eliminating a potential source of corrosion. Suitable for use in freshwater and monovalent brines, incompatible with Gulteraldehyde base biocide.

UNIOS-P

Function
Removes dissolved oxygen from drilling and completion fluids, eliminating a potential source of corrosion. Improves thermal stability of polymers by a margin of 20°F (11.1°C). Suitable for use in freshwater and mono-valent brines

UNIERYT-OS

Function

Non-sulphite oxygen scavenger suitable for mono valent and divalent brines.

UNIZNO

Function

Efficient H2S scavenger, Zinc oxide reacts with sulfides to form ZnS precipitate, which is an insoluble, inert, fine solid remain harmlessly in the drilling fluid and removed through the solids‐control equipment.

UNIZNCO3

Function

Under operating conditions, zinc carbonate reacts with sulfides to form zinc sulfide (ZnS), which has an extremely low solubility in water

(0.0096 g/mL).

Drilling fluids should not be acidified; otherwise, hydrogen sulfide could be liberated.

Zinc carbonate is effective as a scavenger at the pH levels found in drilling fluids.  It is recommended that a pH above 10 be maintained whenever H2S is expected.  This high alkalinity converts the dangerous H2S gas to less toxic bisulfide (HS‐ ) and sulfide (S2‐) ions.  The alkaline pH (>10) allows an extra margin of safety.