Permeability plugging tester is a special instrument for testing the permeability and plugging performance of drilling fluid. The plugging evaluation is carried out by using different specifications of porous sand pan media. It is mainly composed of frame body, high pressure filtrate receiver, drilling fluid cup and pressure device. The cup body is equipped with an experimental cup cover, a floating piston and a scribed bottom cover. The cup body has a groove deeper than the standard cup body to place the sand disc. The sand disc used has stable performance through strict production process control.
In the heating process, the instrument can perform filtration test without the interference of precipitated particles on the filter medium. Under the pressure interval, the plugging tester can demonstrate how the drilling fluid forms a low permeability cake to blocking loss, and can prevent differential pressure sticking. Generally, the differential pressure is much higher than that under high temperature and high pressure test. It can be used outdoors or in a laboratory environment.