US  drilling activity increased slightly, up 5 rotary rigs to 650 working this  week, compared with 402 rigs working in the same period a year ago, according  to Baker Hughes data. 
The entire  gain was in land drilling. Inland waters drilling was unchanged with 3 rigs  working. Offshore rigs were unchanged with 12 rigs working, all in the Gulf of  Mexico. 
Texas  had the biggest surge in drilling activity this week, up by 4 rigs to 312. New  Mexico, Louisiana, and Kansas added 1 rig each for respective totals of 95, 54,  and 1. Oklahoma was down 2 rigs to 51 units working. 
Rig  counts in nine states were unchanged, namely, North Dakota, 33; Pennsylvania,  25; Colorado, 14; Wyoming, 14; Ohio, 11; Utah, 12; West Virginia, 11; and Alaska,  8; and California, 7.
Canada's  weekly rig count increased by 4 to 224 units, up 61 from the 163 units drilling  a year ago.