Tri Tool was first introduced to the Norwegian market in 1987 to solve the largest and most advanced sever, bevel and welding application on an ocean platform that the world had ever seen. At the time The Ekofisk’s, a Norwegian oilfield platform, was literally sinking in the North Sea. The only options were to decommission the structure or extend the massive 42” (1066.80mm) steel tubular legs in order to maintain structural stability.Tri Tool agreed to engineer and design the equipment necessary for severing and machining the massive pipes. In order to accomplish this task Tri Tool designed and manufactured the first ever clamshell type machine that in one single operation could both cut and bevel 42”(1066.80mm) pipes with a wall thickness of 3”(76.20mm)!Due too the phenomenal success the machines that were used in this revolutionary application have been molded into our standard product line, and today they are known as our 600SB and 600RBL clamshell machines.