HOUSTON, Feb. 14 (Xinhua) -- The number of active drilling rigs in the United States stands at 588 this week, up by two from the previous week but down by 33 from a year ago, according to the weekly data released Friday by Houston-based oilfield services company Baker Hughes.
These active drilling rigs include 481 oil rigs operating in the U.S. oil fields, up by one from the previous week, 101 gas drilling rigs, up by one from last week, and six miscellaneous rigs, the same as the previous week.
