Oil and gas production at many fields is characterized by a high hydrogen sulfide content (H2S) in fluids. The presence of large amounts of H2S in the produced fluids leads to an intensification of corrosion of metal equipment for oil and gas production fields.
In the absence of moisture, hydrogen sulfide (H2S), a corrosive agent is not dangerous. In the wet gas containing H2S, the rate of localized corrosion of metal equipment for the extraction of oil and gas under the influence of H2S may reach 2.5 mm/year, which leads to large costs associated with the necessity to repair and replace corroded metal equipment for oil and gas production.
The most preferred of the known methods of protection against corrosion of metallic equipment for the extraction of oil and gas under the influence of H2S, is a method of using corrosion inhibitors, which create resistant protective film on the surface of metal equipment. Corrosion inhibitors should be selected (or create new) specifically, for specific corrosive environments and the concrete operating conditions of the specific equipment of a particular field.
To protect against corrosion of metal equipment for the extraction, preparation and transportation of oil and gas operating under the influence of H2S, the most preferred method is to apply polyfunctional corrosion inhibitors of complex action. Corrosion inhibitors of complex actions for protecting metal equipment for oil and gas under the H2S influence, besides high protective properties, have high detergency and dispersing properties with respect to all types of deposits formed at the metal equipment for oil and gas production and pipelines. Because of this, polyfunctional corrosion inhibitors prevent the intense accumulation of deposits on the surfaces of metal equipment for oil and gas production and pipelines, as well as contribute to their easier and faster removal during washing operations. Multifunctional corrosion inhibitors of complex action are manufacturable and easy to use; resistant to oxidation and sudden changes in temperature; they have no odor; do not realize the negative impact on the quality of raw materials and production facilities at which they are applied; increase the productivity of such facilities; did not affect the health of the staff and the environment.