Portable non-permeable drilling fluid filter is a professional instrument for observing the permeability of drilling fluid. In a transparent cylinder, use sand bed on filter screen without lifter paper, then pour drilling fluid, tighten the cylinder cover, and observe the penetration of drilling fluid through the cylinder under the pressure of air source.
It is mainly composed of bracket, cylinder cover, cylinder, bottom cover, pressure regulator and measuring cylinder, etc.
After several times of development and improvement, the shell of the instrument is made of high-strength transparent material, which has the characteristics of high compressive strength, good permeability, portability, suitability for field experiment operation and strong visibility, etc. Now it has been developed and widely used in major oil fields, geological exploration and laboratory for drilling fluid analysis and determination. This instrument can accurately finish API sand bed experiment, which has practical guiding significance for analyzing downhole conditions.