$4, the number of oil rigs in operation fell by 4 to 642, the lowest level since August 16, 2010.
The combined count fell by 7 to 868, the lowest level since January 24, 2003.
Ahead of the data, West Texas Intermediate crude oil was down about 1%, near $60.11 per barrel.
Crude oil production is still on the rise despite the plunge in rig counts we've now seen for 26 straight weeks.
In its short-term $4 released on Tuesday, the Energy Information Administration estimated that US oil production rose by 9.6 million barrels in May. That's about 400,000 barrels higher than the average production level in the fourth quarter of 2014.
The EIA further forecast that US crude oil production will begin to decline from this month until February 2016.
$4 Here's the latest chart of the plunge:
Andy Kiersz/Business Insider