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The USGS Water Science School

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The Water-Science Picture Gallery

Truck-mounted drill rig

Truck-mounted drill rig for drilling a well.You may think this is a picture of a dirty old truck... but actually this is a modern, high-tech piece of equipment that uses an ancient methodology to drill a well! The drilling being done here is using a "cable tool" to drill through earth and rock. The bit head is at the end of a flexible cable and as the drill gets further down in the rock more cable is played out.

Another method of well drilling uses a drill head (the "bit") at the end of a metal tube. The bit starts drilling a hole in the ground by either chewing or smashing the rock. As the bit chews more and more rock, more piping is added, creating a very long metal tube with the drill bit at the end. Wells more than 1,000 feet deep can be dug using this method.


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URL: http://water.usgs.gov/edu/gwtruckrig.html
Page Contact Information: Howard Perlman
Page Last Modified: Monday, 17-Mar-2014 11:03:21 EDT