Study On The Flow Law Of Reciprocating Gas-liquid Two Phase Annular Flow With Internal Boundary

The gas-liquid two-phase annular flow in the boundary condition of reciprocating movable oil exists widely in the actual production process.And most of the gas-liquid two-phase flow theory the gas-liquid two-phase flow parameters in this case substitution method to eliminate the influence of pressure fluctuations in the boundary effects brought by reciprocating movable pressure,but not a detailed description of the inner boundary reciprocating movable will bring.The study of gas-liquid two-phase annular flow law according to the boundary conditions of reciprocating movable,a number of experiments are carried out and will flow into bubble flow,slug flow and slug flow,which describes the effect of pressure within the boundary will lead to a variety of movable reciprocating flow conditions the frictional pressure drop,the Beggs-Brill formula was modified;while the impact of the inner boundary of reciprocating movable for gas-liquid two-phase annular flow pattern is studied,and the gas The liquid superficial velocity for the axis flow chart drawing and classical flow chart of the existing correction;at the same time for the actual production process of sucker rod coupling was studied for the effect of gas-liquid two-phase annular flow.