The Fast Fill Sub can be run in conjunction with the Magnum Underbalanced Sub Assembly in TCP operations. This tool allows well bore fluids from the annulus to enter the work string and close once the tool reaches a predetermined hydrostatic pressure. The tool can also be closed by applied pump pressure.

• Safe, economical, simple and reliable
• Multiple shear value settings
• Can be used with all firing heads
• Redress Kits Available
  
  

Assemble the Magnum Fast Fill Sub to shear at the correct value to achieve the desired underbalance in the work string. Position the Magnum Fast Fill Sub between the Magnumdisk™ Underbalanced Sub and packer assembly. Run the tool into the well to a predetermined depth to either apply pressure to close the tool or to a specified depth with sufficient hydrostatic pressure to shear the shear screws to close the tool. When the tool shifts close continue to run into the well to perforation depth.