H2S AND MERCAPTAN SCAVENGER OF PS-4 BRAND

Technical requirement 2458-049-53501222-2005

Purpose of Use

H2S and mercaptan scavenger PS-4 is designed to capture H2S and mercaptans during well maintenance at the process of killing or conservation of well, 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-4 is available of two types: type 1 and type 2.

PS-4 type 1 is water solution of mixture of carbonyl and heterocyclic amine-based compounds.

PS-4 type 2 is water-alcohol solution of mixture of carbonyl and heterocyclic amine-based compounds.

Area of Application

  • Completion and killing operations in oil and gas wells having 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-4 type 1

PS-4 type 2

Appearance at 20°С

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

H2S and mercaptan banding type 

Irreversible

Active base content, %, not less than 

36 ± 10

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

 1.02 -.1.12

1.00 - 1.10

Solubility in water

Fully soluble

Freezing point, °С

minus 30

minus 40

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

  0.125

Customers Benefits

  • Low cost of the chemicals.
  • Low consumption of the chemicals.
  • 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 absorption 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.
  • Low freezing point.
  • H2S and mercaptan scavengers PS-4 can be used in acid medium.

Process Technique

Treatment with H2S and mercaptan scavengers PS-4 can be performed both by continuous injection by batch treatment of the fluid. Consumption of the chemicals is not less than 2.2 kg of PS in its commodity form per 1 kilogram of H2S in the treated medium (depending on the type of the treated environment, initial concentration of H2S and mercaptans, operating temperature, mass exchange effectiveness and time given for the reaction).

Packing

H2S and mercaptan scavenger PS-4 is delivered in polyethylene drums with 50 dm3 volume, polyethylene containers with 1 m3 volume and polyethylene drums with 227 dm3 volume.

To select the optimal design of application of the chemicals it is recommended to contact the specialists of Service & Sales Department of Polyex company.

H2S and mercaptan scavengers of PS-4 brand are certified for the application in oil-and-gas industry.

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