The number of drilling rigs operating in the U.S. fell for the first time in six weeks as crude supplies increased in the U.S. and coronavirus cases rose in Asia, putting a damper on oil’s recovery. 

The U.S. rig count fell by one this week to 438, according to oil-field services company Baker Hughes and research firm Enverus, which provide the weekly tally. There were 465 rigs operating a year ago as the global pandemic crushed crude demand and sent prices tumbling. 

The rig count, a leading indicator of the nation’s oil and gas production, bottomed out at 244 in August, before climbing by nearly 200 rigs as crude prices recovered above $60 a barrel. The recovery, however, remains tenuous as countries contend with virus mutations in India and Japan, as well as vaccination setbacks in the U.S. and Europe. 

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West Texas Intermediate, the U.S. crude benchmark, was up 47 cents to $61.90 by midday Friday. 

The rig count in the Permian Basin, which stretches from West Texas into New Mexico, fell by one to 226; the Haynesville in East Texas has 45; and the Eagle Ford in South Texas has 33.

Texas lost three operating rigs this week, bringing the count to 211, compared with a rig count of 231 a year ago. The state is home to most of the Permian Basin, the nation’s most productive shale play, and hosts about half of the country’s oil and gas rigs.