Abstract
A new style single outlet downhole hydrocyclone desander with spiral deflectors was designed according to the working characters of downhole desander, which combined hydrocyclone separation and sediment separation. Numerical simulation was conducted to analysis effect of produced liquid viscosity on flow characteristics and separating property. The results show that the tangential velocity of hydrocyclone desander decreases rapidly and the axial velocity and radial velocity of hydrocyclone desander changes slightly when the produced liquid viscosity changes in the range of 1.5mPa·s ~ 30mPa·s. Separation efficiency drops sharply and pressure drop decreases slightly with the increasing of produced liquid viscosity.
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