VORRICHTUNG ZUM ABTRENNEN ROHRFOERMIGER GRUENDUNGSPFAEHLE UNTER WASSER.

摘要

The cutting rig is suspended from the working barge and has the cutting head at the bottom end of the shaft extension. The shaft is positioned inside the piles which anchor the offshore installation onto the seabed and the cutting head cuts through the pile cleanly. The cutters are either mechanical or flame types. The cutting rig is powered by lines to the surface and the piles are first cleaned from the inside by water jets and/or air jets from the cutting head. For flame cutting the rig seals off the pile and pumps out the water. The rig is positioned by remote control from the barge.