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Through a large number of experiments , complete the following tasks : ( 1) determination of the drag reduction rate of polymer drag reduction agent under different synthesis conditions , and in-depth study of the delivery pressure and additive concentration for the samples of the same polymer drag reduction rate ; (2) measuring the drag reduction properties of the sample of bulk polymerization, solution polymerization and prepolymerization of the polymer DRA , confirmed in the current synthesis techniques , at the same effective concentration , drag reduction rate from the DRA high to low in the order : the solution polymerization samples , bulk polymerization samples prepolymerization samples ; ( 3 ) determination of the shear resistance of the polymer DRA , which affect the shear resistance of the same transport conditions DRA the main factors are: the molecular weight of the additive concentration and the DRA . Confirmed that the anti - shear properties in low additive concentration , molecular weight of the polymer DRA is not obvious, but when the concentration was increased , the weight average molecular weight close to , HI sample shear properties ; ( 4) Determination of the different viscosity of the fluid conveyance drag reduction rate of the same polymer DRA , the polymer drag reducing agent in the low viscosity of the transport fluid flow , the less drag reduction effect ; (5) Finally the cleaning of the indoor ring Road . Ring channel system for long-term use , then washed with an organic solvent of n-hexane , it is possible to make the system portion restored. In this paper, the evaluation of the indoor ring trail shear performance , low-viscosity fluid as the transmission fluid and cleaning indoor ring road system is typical . Provide an effective basis as field trials and field applications .
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