U.S. oil drillers add rigs for 4th week in five -Baker Hughes

July 1 (Reuters) - U.S. drillers this week added oil rigs for a fourth week in five, according to a closely followed report Friday, in the best month of producers returning to the well pad since August that signaled a near-two year rout in drilling may have ended. Drillers added 11 oil rigs in the week to July 1, bringing the total rig count up to 341, compared with 640 a year ago, energy services firm Baker Hughes Inc said. Before this week, drillers added oil rig