Workers connect drill bits and drill collars, used to extract natural petroleum, on Endeavor Energy Resources' Big Dog Drilling Rig 22 in the Permian basin outside of Midland, Texas.

The cost of drilling and fracking wells in the nation's hottest oil fields is quickly rising — that's if you can book the crews to do the work.

The Permian Basin that lies beneath western Texas and southeastern New Mexico is ground zero for the U.S. shale drilling revival. The basin's geology allows producers to extract oil economically, but contractors are jacking up prices as drillers pile into the region.