Wegener also noted that the continents move up and down to maintain equilibrium in a process called isostasy. As an example he cited the sinking of Northern Hemisphere lands under the weight of continental ice sheets in the last ice age, and their rise since the ice melted some 10,000 years ago.
Drill that is fitted with a Pipe provides effective connection to the rig surface equipment or application with the bit and the bottom hole assembly for the purpose of pumping the Drill fluid to the bit.
Carbide Drill Bits. The carbide drill bits provided by Regal Cutting tools are for industrial use in materials such as cast iron, nonferrous heavy metal and other abrasive materials. Carbide drill bits maintain a sharp cutting edge longer than HSS or Cobalt and are run at higher speed rates as they absorb heat more efficiently.