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Oil majors betting big on shale technology

The technological push comes amid worries that US shale gains are slowing as investors press for higher financial returns

An oil and gas processing plant fed by local shale wells along a highway outside Carrizo Springs, near the Mexican border, in Dimmit County, Texas.


SHALE oil engineer Oscar Portillo spends his days drilling as many as five wells at once - without ever setting foot on a rig.

Part of a team working to cut the cost of drilling a new shale well by a third, Mr Portillo works from a Royal Dutch Shell Plc office in suburban

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