The number of oil rigs operating in the U.S. has fallen to a historical low, but hydraulic fracturing crew are beginning to return to work, especially in the Permian Basin of Texas and southeastern New Mexico, according to the Houston Chronicle.
As the number of active frack crews grew by 6.8 percent in July, the West Texas Shale play now accounts for 43 percent of all active frack crews in the U.S.