The BG-PE Seal is a secondary seal of different design. It is a five piece assembly consisting of an upper and lower junk ring, a seal element, a non-extrusion ring and a snap ring to retain the assembly in the secondary seal area of a casing spool or tubing head.
The upper junk ring serves as a bit guide, (BG)
In this design the seal element is pressure energized, (PE)
Utilizes a single molded seal element to affect a annular seal
Is extremely robust and will still offer a solid, positive seal even if the sealing areas of the element have been damaged and/or sections of the seal element are missing