Oilfield service sector could see $30billion growth by 2018

The Ecopetrol SA oil refinery stands in Cartagena, Colombia, on Tuesday, March 13, 2012. Ecopetrol SA, Colombia's largest oil company, plans to finish repairs this week to a pipeline sabotaged by guerrillas more than a dozen times this year. Photographer: Paul Smith/Bloomberg
The Ecopetrol SA oil refinery stands in Cartagena, Colombia, on Tuesday, March 13, 2012. Ecopetrol SA, Colombia's largest oil company, plans to finish repairs this week to a pipeline sabotaged by guerrillas more than a dozen times this year. Photographer: Paul Smith/Bloomberg

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