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.
A drill is one of the most essential tools in any toolbox, and with the right drill bits, you can tackle a wide range of projects. Whether they're boring holes to put up a wooden fence or countersinking screws, there are many types of bits you can use to get the job done quickly and efficiently.