The number of oil rigs in the U.S. increased by 4 this week, from the previous week, according to data released by oilfield services company Baker Hughes on Friday.
The oil rig count in the U.S. reached 793 for the week ending June 28, from 789 the week before, the data showed.
Following the data, international benchmark Brent crude closed Friday at $64.87 per barrel, marking a 1.84% decrease over Thursday's closing price of $66.09.
American benchmark West Texas Intermediate (WTI) was down 1.90% on Friday, ending the day at $58.13 a barrel, after closing the previous day at $59.26 per barrel.
Oil prices increased more than 2% on Wednesday after commercial crude oil inventories in the U.S. showed a massive decline of 12.8 million barrels for the week ending June 21, according to the Energy Information Administration (EIA).
However, the market expectation for U.S.' weekly commercial crude inventories was a decline of 2.5 million barrels.
The month of June was dominated by rising tensions between the U.S. and Iran, with attacks on oil tankers in the Middle East, and with falling crude inventories in the U.S.
By Gulsen Cagatay