EXPERIMENTAL DEVICE FOR SIMULATING INVASION OF SHALLOW FLUID INTO WELLBORE

摘要

The present invention provides an experimental device for simulating invasion of shallow fluid into a wellbore, comprising: a casing pipe; a drilling-in device including a drill string extending into the casing pipe, and a drill bit located within the casing pipe and connected to the drill string; a driving device for driving rotation of the drill string, the driving device being disposed outside the casing pipe and connected to the drill string; a drilling fluid injection device for injecting drilling fluid into the drill string, the drilling fluid injection device being disposed outside the casing pipe and connected to the drill string; a shallow fluid injection device for injecting shallow fluids into the casing pipe, the shallow fluid injection device being disposed outside the casing pipe and communicating with the casing pipe; a pressure detection device for detecting a pressure within the casing pipe, the pressure detection device being connected to the casing pipe.