Figure 18.
The schematic places the GeoCERF pit below the surface and connects a rotary union through lines 1, 2, 3 and 4. Lines 1 and 3 connect to a cylinder with compressed air, carbon dioxide or nitrogen plus a pressure regulator. Line 4 connects to a pilot cylinder with compressed air, carbon dioxide or nitrogen plus a pressure regulator. Line 2 connects to the carbon dioxide collector. Maximum pressures of 3 megapascals, 4 megapascals, 300 kilopascals and 100 kilopascals mark different lines. The central assembly contains a membrane above the sample and P R 2 beneath it. A pressure supply for the membrane passes through P R 2, and another pressure supply serves the jacks. A Parker motor, gear head and hydraulic cylinder connect to the sample assembly. Valves A, B, C, D, F, G and K control connected lines. B P R 1 connects valve B to the pilot reference pressure line and the carbon dioxide collection circuit. Two dead oil containers connect to this circuit. An electrically operated air on and off valve has a 1 over 4 N P T port, normally closed operation and 120 V A C supply. The note states that 30 grams creates around 11 P S I, 75.8 kilopascals, pressure for the wellbore. A key identifies valve and manual pressure regulator symbols.Schematic diagram of the integrated GeoTriax centrifuge test set-up