Research on the mechanism of the influence of flooding on the killing of empty wells

Abstract In empty well killing, in order to save the time and cost of killing well, dynamic replacement method is often used kill well. The main problem for wells how avoid terrible working conditions caused by flooding, such as gas carrying fluid, fluid being brought wellhead. Based on principle flooding formation basic tenets correlation experiment method, this paper incorporates viscosity, surface tension, droplet diameter, inclination angle, drill pipe joint outer eccentricity into calculation range establishes a new mathematical model suitable kill. results, influencing factors are analyzed, following conclusions drawn: increase density casing pressure, outside diameter pipe, joint, can promote occurrence flooding; well-killing density, inner have an obstacle flooding.