Meanwhile in the oil & gas drilling and exploration sector: > According to market research by IBISWorld, a leading business intelligence firm, the total revenu

Meanwhile in the oil & gas drilling and exploration sector: > According to market research by IBISWorld, a leading business intelligence firm, the total revenues for the oil and gas drilling sector came to $2 trillion in 2017. [0] https://www.investopedia.com/ask/answers/030915/what-percentage-global-economy-comprised-oil-gas-drilling-sector.asp https://www.investopedia.com/ask/answers/030915/what-percent...