Study On Sustained Release Of Drag Reducing Agent

In order reduce the frictional resistance of crude oil produced in the pipeline flow, increase the output of crude oil, the drag reduction agent is widely used in oil transportation process. The drag reduction agent in actual use, there are some problems to be solved. At present, the mechanical degradation of drag reducing agent in the pipeline under the condition of turbulent flow, so as to gradually reduce or even lose people also need to further explore the problem of the efficiency of drag reduction. The drag reduction agent in industrial applications, in order to achieve the best drag drag reduction agent increasing transportation effect, each time through the high shear area after the need of oil pipeline additive. In order to halfway to join the DRA, need to set the agent site. This not only greatly increase the drag reduction agent, but also consume more resources, affect its economic feasibility.This paper has carried out the synthesis of drag reducer optimization analysis. Study on drag reducing agent innovation proposed release type, can make the drag reduction agent has sustained-release effect, can improve the drag reduction of shear and extension of drag reducing agent usage time, reduce the drag reduction agent injection device can effectively save the cost of the site. According to the analysis of solubility parameter, compatibility, insoluble oily and melting point, and non-toxic, environmentally friendly polymer materials, as well as economic considerations, choose appropriate release agent. Release agent used in this paper is a polyethylene(PE), polypropylene(PP),ethylene vinyl acetate copolymer(EVA). The test using melt blending to prepare different slow-release drag reduction agent, the preparation process, but also explore the impact of temperature on the rate of drag reduction. The analysis found that when the drag reduction agent by heating temperature is higher than 130 centigrade, the drag reduction rate significantly affected, more than 160 centigrade when the drag reduction rate dropped to almost zero. Therefore, preparation of sustained-release drag reducing agent in melting heating system, the highest temperature can not exceed 130 centigrade Second, using the weight and drag reduction rate determination algorithm to calculate the release rate, and release effect evaluation. At the same time, sustained-release experiment for different proportion of DRA slow-release effect, Find out the relationship between the ratio and the release rate.