User Manual for OFITE 171-193-6K Permeability Plugging Tester

Quick Guide from the Manual

The Permeability Plugging Tester (PPT) is designed for filtration tests on plugging materials. Key operational steps include preheating the heating jacket to 10°F above the target temperature, inspecting and greasing all O-rings, and ensuring the pressure release valve on the pump is closed before starting. Always use Carbon Dioxide or Nitrogen for pressurization; never use compressed air, oxygen, or nitrous oxide.

Safety Precautions

• Temperature: The heating jacket and test cell become extremely hot. Use protective clothing.
• Pressure: Do not exceed the maximum working pressure of 6,000 PSI (41.4 MPa).
• O-Rings: Use Viton 75D (black) for tests up to 400°F and Viton 90D (green) for tests up to 500°F. Inspect for damage before every test.
• Corrosion: Inspect the cell body and caps for corrosion before and after each test.

Equipment Assembly

The cell assembly involves placing O-rings on the shoulder inside the cell body and around the cell cap. Apply anti-seize compound to the threads of the cell caps. For the piston, ensure the set screw on the bleeder valve is loose during assembly, then tighten it after the piston is in place. Ensure all quick-connect fittings are fully engaged until they click.

Testing Procedures

For LCM Testing: Fill the cell with no more than 250 mL of test fluid. Stroke the pump until the fluid level reaches the O-ring shoulder. Assemble the receiver, ensuring the filter is in place, and fill the void space with water before starting.

For PPT Testing: Stroke the pump until the T-handle rises approximately 1.5 inches. Pour test fluid into the cell, keeping the level just below the O-ring shoulder. Fill the outlet valve stem assembly with base fluid before attaching the back pressure receiver.

Data Analysis

To compare results to a standard filtration test (which has a 7.1 in² area), double the total filtrate volume collected (VF = 2 * V30). Spurt loss can be calculated using the formula: V1 = 4 * V7.5 - 2 * V30.

Maintenance and Troubleshooting

Clean and dry all components with water and soap after use. Periodically check for leaks by pressurizing the cell and immersing it in water. If the regulator malfunctions, symptoms like gas leaks at the outlet or inconsistent readings often indicate a need to replace the regulator or gauge.