I work in the drilling data industry and have access to data as well as anecdotal observations. But there are lots of published articles e.g. [1], [2] [1] http

I work in the drilling data industry and have access to data as well as anecdotal observations. But there are lots of published articles e.g. [1], [2] [1] http://www.nytimes.com/2015/05/12/business/energy-environment/drillers-answer-low-oil-prices-with-cost-saving-innovations.html?_r=0 http://www.nytimes.com/2015/05/12/business/energy-environmen... [2] http://www.worldoil.com/news/2015/8/12/oil-at-30-is-no-problem-for-some-cost-cutting-bakken-drillers http://www.worldoil.com/news/2015/8/12/oil-at-30-is-no-probl...