Sorry for an confusion in terms.
I brought up Mexico oil imports to the US to point out that Mexico and Pemex to export a lot of oil to the rest of the world and they profit from those exports. By that reasoning I do not understand why Mexico needs to continue to raise prices to the people of Mexico. Venezuela has not done this. That was my point.
To clarify any confusion - the percentages I gave were to show how much of the oil the US IMPORTS comes from where - the other figures above are the percent of oil the US CONSUMES and where it comes from. Very difficult to find sources that agree on exactly how much we import of what we use (some source web addresses below). But my point again was just to say that Pemex makes money from exporting oil - which should help to keep costs to Mexican consumers down - but this does not seem to be working. So if Haliburton and Schlumbereger are allowed to work with Pemex (I think they already are?) then Mexico can increase their production and their exports and maybe save the citizens some money.
Below are some websites with charts and graphs that cannot be reproduced here. They can vary greatly - depends on dates and monthly production and consumption. Again - to stay on topic - the concern is why Mexico cannot profit enough from oil production and exports to keep their domestic prices down?
http://www.npr.org/2012/04/11/150444802/where-does-america-get-oil-you-may-be-surprised
http://www.eia.gov/dnav/pet/pet_move_impcus_a2_nus_ep00_im0_mbbl_m.htm
http://www.eia.gov/tools/faqs/faq.cfm?id=727&t=6
http://www.businessinsider.com/map-us-oil-imports-by-country-of-origin-2013-1
http://askville.amazon.com/percentages-oil-buy-countries/AnswerViewer.do?requestId=5430673
https://www.google.com/search?q=us+oil+imports+by+country+of+origin+percentages&espv=2&tbm=isch&imgil=Sub39awJ2dzJxM%253A%253BXTNs3SWXOQIseM%253Bhttp%25253A%25252F%25252Fwww.eia.gov%25252Ftodayinenergy%25252Fdetail.cfm%25253Fid%2525253D5570&source=iu&fir=Sub39awJ2dzJxM%253A%252CXTNs3SWXOQIseM%252C_&usg=__LtNHmSPLr7rGO_aPOsMgGVd9RZI%3D&sa=X&ei=WdQMVK2IHeWM8QHSx4CwDw&ved=0CD4Q9QEwAw&biw=1440&bih=781#facrc=_&imgdii=_&imgrc=Sub39awJ2dzJxM%253A%3BXTNs3SWXOQIseM%3Bhttp%253A%252F%252Fwww.eia.gov%252Ftodayinenergy%252Fimages%252F2012.03.27%252FMonthlyCrudeImports.png%3Bhttp%253A%252F%252Fwww.eia.gov%252Ftodayinenergy%252Fdetail.cfm%253Fid%253D5570%3B542%3B277