Research and Development Patents and Trademarks International Operations The market for our services and products is characterized by changing technology and frequent product introduction. As a result, our  success is dependent upon our ability to develop or acquire new services and products on a cost-effective basis and to introduce them  into the marketplace in a timely manner. Many of our acquisitions have allowed us to obtain the benefits of the acquired company’s  research and development projects without the significant costs that would have been incurred if we had attempted to develop the  services and products ourselves. We incur costs as part of internal research and development and these costs are charged to expense  as incurred. We intend to continue committing financial resources and effort to the development and acquisition of new services and  products. Over the years, we have made a number of technological advances, including the development of key technologies utilized in our operations. Substantially all of the new technologies have resulted from requests and guidance from our clients, particularly  major oil companies. We believe our patents, trademarks, trade secrets and other intellectual property rights are an important factor in maintaining our  technological advantage, although no single one of these is considered essential to our success. Typically, we will seek to protect our  intellectual property in all jurisdictions where we believe the cost of such protection is warranted. While we have patented some of our  key technologies, we do not patent all of our proprietary technology even where regarded as patentable. We protect our intellectual  property, including through the use of appropriate confidentiality agreements, legal enforcement proceedings and by other means. We operate facilities in more than 50 countries. Our non-U.S. operations accounted for approximately 53%, 49% and 49% of our  revenue from operations during the years ended December 31, 2013, 2012 and 2011, respectively. Not included in the foregoing  percentages are significant levels of our revenue recorded in the U.S. that are sourced from projects on foreign oilfields. While we are subject to fluctuations and changes in currency exchange rates relating to our international operations, we attempt to  limit our exposure to foreign currency fluctuations by limiting the amount in which our foreign contracts are denominated in a currency  other than the U.S. dollar to an amount generally equal to the expenses expected to be incurred in such foreign currency. However,  the ultimate decision as to the proportion of the foreign currency component within a contract usually resides with our clients.  Consequently, we are not always able to eliminate our foreign currency exposure. We have not historically engaged in and are not  currently engaged in any significant hedging or currency trading transactions designed to compensate for adverse currency fluctua- tions. The following graphs summarize our reported revenue by geographic region (in contrast to the location of the reservoirs) for the  years ended December 31, 2013, 2012 and 2011: Geographic Breakdown of Revenue Latin and South America 5% Former Soviet Union 5% Asia Pacific 8% United States 47% Europe/Africa/ME 24% Canada 11% Former Soviet Union 5% Asia Pacific 9% United States 50% Europe/Africa/ME 23% Canada 9% Former Soviet Union 4% Asia Pacific 9% United States 51% Europe/Africa/ME 23% Canada 9% Latin and South America 4% Latin and South America 4%