Field Application of HG Drag Reduction Agent in Hejian-Shijiazhuang Oil Pipeline

The application of HG Drag Reduction Agent in Hejian-Shijiazhuang Oil Pipeline is described and the influence of DRA reinjection in intermediate station on the operation of pipeline with DRA-added and the influence of DRA i njection position on drag reduction effect are discussed.Site injection results show that DRA rei nj ection in intermediate station can obtain a certain drag reduction effect and throughput increase, but the actual dispersion time of DRA should be taken into account.It is pointed out that to reduce and avoid the effect deterioration of shear on HG DRA, proper inj ection location of DRA should be at the outlet pipeline of pump station.