The Earth’s mantle is usually located far deeper than modern drilling technology’s capacity. However, in a few locations, the mantle is reachable, in areas where the Earth’s crust is thin enough – typically in ocean basins – where the crust-mantle interface is nearly 7 km below the ocean’s floor. In these regions, however, the water depth is typically 4000 meters or deeper; therefore, a drilling platform will need a minimum of 11000 meters of drill pipe.
At this point, the static tension of the drill string itself, combined with the dynamic tension caused by the drilling platform’s heave at the ocean’s surface cannot exceed the allowable design loads of the drill pipe, drill joints, and other drilling equipment.
Furthermore, the long time needed to drill to these extreme depths causes wear and fatigue to all tools and equipment. These factors must be considered and designed for, when preparing for such extreme drilling programs.

Our Objectives
  • Develop high-strength (>S160), large-diameter (5-7/8 or 6-5/8 inch) drill pipe, at least 10% stronger than current designs.
  • List: Develop high-strength tool joints, to match the capabilities of the new drill pipe.
Actual pipe fatigue test for high strength drill pipe(at Stress Engineering Service)
Actual pipe fatigue test
for high strength drill pipe
(at Stress Engineering Service)
Experiment of "Slip-Crush" becoming the problem by ultra depth digging(at Blohm + Voss Oiltools,Blohm + Voss is a trademark of Blohm + Voss Shipyards GmbH®)
Experiment of "Slip-Crush" becoming the problem
by ultra depth digging
(at Blohm + Voss Oiltools,Blohm +
Voss is a trademark of Blohm + Voss Shipyards GmbH®)