CLB 2018 Annual Report

F-31 December 31, 2016 Revenue from unaffiliated clients $ 426,205 $ 164,027 $ — $ 590,232 Inter-segment revenue 784 877 (1,661) — Segment operating income 78,881 8,470 100 87,451 Total assets (at end of period) 316,801 195,104 61,147 573,052 Capital expenditures 8,220 2,298 838 11,356 Depreciation and amortization 18,494 5,856 2,522 26,872 (1) "Corporate and other" represents those items that are not directly relating to a particular segment and eliminations. We are a Netherlands company and we derive our revenue from services and product sales to clients primarily in the oil and gas industry. No single client accounted for 10% or more of revenue in any of the periods presented. We attribute service revenue to the country in which the service was performed rather than where the reservoir or project is located while we attribute product sales revenue to the country where the product was shipped as we feel this gives a clearer view of our operations. We do, however, have significant levels of service revenue performed and recorded in the U.S. that are sourced from projects on non-U.S. oilfields. The following table shows a summary of our U.S. and non-U.S. operations for the years ended or at December 31, 2018, 2017 and 2016 (in thousands): GEOGRAPHIC INFORMATION United States Canada Other Countries (1) (2) Consolidated December 31, 2018 Revenue $324,073 $ 34,633 $ 342,140 $ 700,846 Property, plant and equipment, net 65,073 9,567 48,277 122,917 December 31, 2017 Revenue $283,969 $ 30,131 $ 333,719 $ 647,819 Property, plant and equipment, net 63,812 9,725 49,561 123,098 December 31, 2016 Revenue $224,642 $ 20,537 $ 345,053 $ 590,232 Property, plant and equipment, net 71,388 10,497 47,997 129,882 (1) Revenue earned in other countries, including the Netherlands, was not individually greater than 10% of our consolidated revenue in 2018, 2017 or 2016. (2) Property, plant and equipment, net in other countries, including the Netherlands, were not individually greater than 10% of our consolidated fixed assets in 2018, 2017 or 2016. The following table shows the breakdown between services and product sales for the years ended December 31, 2018, 2017 and 2016 (in thousands): SEGMENT BREAKDOWN BETWEEN SERVICES / PRODUCT SALES 2018 2017 2016 Reservoir Description Services $ 387,098 $ 393,742 $ 400,034 Production Enhancement Services 99,722 86,522 68,354 Total Revenue - Services $ 486,820 $ 480,264 $ 468,388 Reservoir Description Product sales $ 25,984 $ 21,478 $ 26,171 Production Enhancement Product sales 188,042 146,077 95,673 Total Revenue - Product sales $ 214,026 $ 167,555 $ 121,844 Total Revenue $ 700,846 $ 647,819 $ 590,232