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.
Equipment that is used for Drilling is also known as oilfield parts that can perform seismic surveys as well as shock waves that are created with the help of the following gears: 1  Compressed air guns that shoot pulses or columns of air into the water for explorations over the water.