A New Experimental Approach for Hydraulic Fracturing Fluid Damage of Ultradeep Tight Gas Formation

Figure 3

Flow chart of the pressure transmission test: (1) ISCO pump, (2) vacuum pump, (3) nitrogen gas bottle, (4) intermediate vessel for upstream and (5) downstream formation fluids, (6) intermediate container for testing fluids, (7) special core gripper, (8–17) control valve, (18–21) pressure transducer, (22) gas pressure-regulating valve, (23) back pressure valve, (24) waste liquid tank, and (25) thermotank.