HOUSTON, June 5 (Xinhua) -- The number of active drilling rigs in the United States decreased by 17 to 284 this week, down by 691 year on year, according to the weekly data released Friday by Houston-based oilfield services company Baker Hughes.
These active drilling rigs included 206 oil rigs operating in the U.S. oil fields, down by 16 from the previous week; 76 gas drilling rigs, down by one from the previous week; and two miscellaneous rigs, unchanged from last week.
The 284 rigs included 271 land drilling rigs, down by 18 from the previous week; and 13 offshore drilling rigs, up by one from the previous week. There was no inland waters drilling rig this week, the same as last week.
Of them, 24 are directional drilling rigs, 253 are horizontal drilling rigs, and seven are vertical drilling rigs.
During the week, the number of drilling rigs decreased the most by 12 in the state of Texas to 115.
By far, the Permian Basin in western Texas and eastern New Mexico has been the largest source of shale oil production growth in the United States, having become an engine of supply growth outside the Organization of the Petroleum Exporting Countries in the past years.