Application
The most common type of oxygen scavenger used in oil and gas production facilities is the sulfite ion, which is supplied as ammonium bisulfite, sodium sulfite, sodium bisulfite or sulfur dioxide. These sulfite scavengers react via a free-radical-chain mechanism, and thus are aided by the presence of a metal catalyst as an initiation step. Also, sodium hydrosulfate and hydrazine are used in limited applications
The products designed for water and gas application form water- soluble, low-toxicity, biodegradable compounds which are non-corrosive and which will not release hydrogen sulfide even over extremes of pH variation.
Products destined for use in oil systems can be pumped directly into the stream. They are completely oil-soluble and yield oil-soluble, biologically friendly reaction byproducts.
The most common application for H2S scavengers is direct injection into a wet gas stream, frequently at the outlet to the three-phase separation train. It is normal for the largest proportion of the H2S to be removed at the high-pressure separator.
In most cases, the water present in the wet gas stream from the three-phase separators will be solely condensed water. If some produced or formation water is present, significant carbonate scale problems may be encountered.
Drag reduction in pipeline
Pipe line flow are classified as Laminar and Turbulent
Turbulent Flow require high Energy and Pressure
DRA inclusion in the system transforms the turbulent to laminar flow thus increases the flow rate
