Baker Hughes (NYSE:BHI) said it sees Q1 operating profit before tax lower on North American Pressure pumping products as US rig activity shifts to oil, liquids-rich basins from natural gas, seasonality in all international markets.The company said it sees its North American Q1 operating margin before taxes at 13.2% – 14.2% vs. estimates of 18.7% quarter-over-quarter.The company sees Q1 international operating margin before tax of 12.2% – 13.2%, vs. 15.6% quarter-over-quarter and it sees adjusting 2012 capex, saw annual capex of $3.1 billion – $3.4 billion.