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.
The Drill is hollow and thick walled tubing that is made of steel with a variety of uses. Pipe for drilling provides for the drilling of a well bore and is available in a number of sizes. Drill pipes also provide strength and weight and are typically 30 ft to 33 ft long. Drill Pipe is also hollow in nature as it helps the fluid to pass through the Pipe, down the hole and back up to the annulus.