U.S. drillers add oil rigs for fourth week in five Christian Fernsby ▼ | March 6, 2020 U.S. energy firms added oil rigs for the fourth time in five weeks.Article continues below Topics: U.S. OIL RIG Companies added 4 oil rigs in the week to March 6, bringing the total count to 682, their highest since December, Baker Hughes s ■