This year "DEPRAN" R&D LLP is celebrating its 20th ANNIVERSARY!
Long live DEPRAN!
It’s a well established that content of tar and paraffin waxes in crude oil increases as oilfield aging. This is due to that on earlier stages of production activity an extraction of more mobile, light fraction of crude oil occurs. Further, when applying secondary methods of production activity the extraction of heavier fraction of crude oil occurs. One of the important problems at the production activity is removal of waxes from oil well equipment. Wax build-up leads to decrease of flow area of transfer lines and also affects working parts of pumps. As a result the rate of yield decreases and the frequency of necessary repairs increases. Technological process of crude oil collection and transportation is accompanied by corrosion of inner surfaces of transfer lines. This is related with high mineralization of oil-well products, corrosive activity of water, extracted simultaneously with crude oil, presence of atmosphere oxygen and other factors. As water content in the products of oil well extraction increases the corrosion of transfer lines increases even more and often leads to the outbreak of pipelines. It’s well known that such outbreak of transfer lines can lead to ecological catastrophe. Partial replacement of the transfer line can’t guarantee against the possibility of future outbreaks at different spots of transfer line. The replacement of whole transfer line even 10-20 km in length requires substantial investments. In most cases methods of chemical protection of transfer lines are most cost effective. To prevent the corrosion of inner surfaces of pipelines water and oil soluble inhibitors are used. Our additive allows to improve rheological properties of crude oil: decrease paraffin wax deposits on the surfaces of oil well equipment and increase timeframe between required purging of oil wells. Quantitative estimation of wax deposition is conducted using cold-finger method.