H2S AND MERCAPTAN SCAVENGER OF PS BRAND

Technical Requirements TU 2458-049-53501222-2005

Purpose  of Use

H2S and mercaptan scavengers of PS brand are designed to capture H2S and mercaptans during well maintenance at the process of killing or conservation of wells, at flushing of bottom hole, during oil production and transportation, as well as for inhibiting of the corrosion processes associated with the presence of H2S and mercaptan.

H2S and mercaptan scavenger PS-1 is aldehyde-based mixture of heterocyclic carbonyl and amine-based compounds; doesn't contain formaldehyde; concentrated form with basic substance content of 100%.

H2S and mercaptan scavenger PS-2 is aldehyde-based mixture of heterocyclic carbonyl and amine-based compounds; doesn't contain formaldehyde; water-alcohol solution with basic substance content of 25%.

Application Area

  • Completion and killing operations for oil and gas wells which have high hydrogen sulfide and mercaptan emission.
  • Treatment of water which contains hydrogen sulfide and mercaptans.
  • Treatment of produced water prior it to be injected in the formation.

Properties

Grade

PS-1

PS-2

Appearance at 20°С

Liquid with the colour varying from light-yellow to dark-brown  with specific odor

Active base

Non-formaldehyde / cyclic aldehydes based

H2S and mercaptan banding type 

Irreversible

Specific gravity at 20°С / 68°F, g/cm3 ,
within the range

 1.15 -.1.16

0.95 - 1.00

Absorptive power for H2S, g/cm3,
not less than

0.33

0.2

Solubility in water

Fully soluble

Freezing point, °С

Minus 35 - minus 50

Corrosiveness of the commodity form,
g/(m2*hour), for 24 hours at
20°С,
not more than

  0.125

Customer Benefits

  • The chemicals are less toxic than traditionally applied H2S scavengers.
  • Compatible with the modifying agents used for brine fluids for well completion and killing.
  • High capturing power for H2S and mercaptans.
  • High reaction speed for H2S. The reaction is not reversible. The reaction products are stable and safe, they show distinct inhibiting properties and do not precipitate.
  • High bacterial growth-inhibitory activity for sulfate-reducing bacteria, efficient H2S corrosion inhibiting.
  • Highly soluble in brine fluids for well completion and killing. Solubility of grade PS-1 in water-based brine completion fluids is up to 8 %. Solubility of grade PS-1 in hydrocarbon-based completion fluids is up to 5 %. H2S and mercaptan scavenger PS-2 can be diluted in water-based brines at any rate.
  • Low freezing point of H2S and mercaptan scavengers PS.
  • H2S and mercaptan scavengers PS can be used in acid mediums.

Process Technique

Treatment with H2S and mercaptan scavengers  PS-1 and PS-2 can be performed both by continuous injection and in the form of single treatment of the fluid. Consumption of the chemicals is not less than 3.2 kg of PS in its commodity form per 1 kg of H2S in the treated medium (depending on the type of the treated medium, initial concentration of H2S and mercaptans, operating temperature, mass exchange effectiveness and time given for the reaction).

Packing

H2S and mercaptan scavengers PS-1 and PS-2 are delivered in steel drums of 200 l.

To select the optimal design of application of H2S and mercaptan scavengers  PS-1 and PS-2 it is recommended to contact the specialists of Service & Sales Department of Polyex company.

H2S and mercaptan scavengers of  PS-1 and PS-2 are certified for the application in oil-and-gas industry. 

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