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Casing Perforator

  • The air perforator effectively perforates installed steel or PVC casing. The steel casing perforating wheel punctures rows of approximately 1/10" x 1" slots in wall thicknesses up to 0.450". The PVC casing perforating wheel punctures rows of approx. 0.050" x 0.400". The perforating wheels are easily changed out for replacement or switching between steel and PVC casing.

    The 6" perforator is the most popular, having an OD of 5.9" that is ready for 6-5/8" OD casing with a 0.250 or 0.280" wall. When perforating thinner wall casing (0.150") the travel stops can be removed, resulting in slightly larger holes. Adapters (shoes) are needed for larger casings (see below).  Please contact us with your exact needs so we can outfit you with proper equipment.

    What You Can Expect From Perforators

    • The precision machined body is necessary to keep axle pins and other internal parts from becoming warped.

    • Quality carbon-treated body and internal parts.

    • Adapters for larger size casing are available. Slide shoes adapt to a 6" perforator to perforate 8" and 10" casing and roller shoe to 12".

    • 3" and 4" units use adapters for 5" casing. 6" units use adapters through 12".

    • 10" units use adapters up to 26".

    6" perforator with slide shoes

    Slide shoes

    10" perforator with roller backing plate

    Roller backing plate

    Cutting wheel for steel casing

    Operating Hints

    Air Pressure
    Air or water pressure of at least 40 PSI is required to set the wheel into cutting position. When the perforator is under water you must add air or water to equal the pressure outside the perforator plus at least 40 PSI. Using more pressure does not cause a problem. The perforator pop-off or developing valve opens at approximately 80 to 90 PSI. Down pressure on the drill pipe makes the wheel rotate and punch holes.

    Perforator Orientation
    Perforations are made when the tool is moving downward from top to bottom. Changing the configuration allows the perforator to be set up for pull-back operation.

    As a general rule, 3 to 4 columns of perforations are recommended for 6" to 8" pipe. For 10" to 12" pipe, 6 to 8 columns of perforations are recommended.

    Travel Stops
    Travel stops are attached to the perforator body to restrict the reach of the wheel. For casing thinner than 0.250", remove the travel stops. This allows the wheel to extend out further for the thinner walled casing.