The number of oil drilling rigs in the US decreased by 4 this week. Weekly data from the oilfield services company Baker Hughes was released. Accordingly, the number of oil drilling rigs in the country decreased by 4 to 484 in the week of September 21-27 compared to the previous week. The number of oil drilling rigs in the US has decreased by 18 in the past year. The price per barrel of Brent crude oil, which closed at $71.09 on Thursday, ended Friday at $71.54. The price per barrel of West Texas Intermediate (WTI) crude oil closed on Friday at $68.18. WTI crude oil closed at $67.67 per barrel on Thursday.