US oil drillers increased rigs this week for a 20th week in the last 23, as energy firms follow through on plans to add rigs made months ago when crude was still trading over the key $50 a barrel level analysts said should lead to more drilling.
Drillers added nine oil rigs in the week to 4 November, bringing the total count up to 450, the most since February, but still below the 572 rigs seen a year ago, energy services firm Baker Hughes said on Friday.
