Intangible Drilling Costs 4 : Those items of costs relating to drilling, testing and completion operations on the Well which are not Tangible Costs thereof
EESiFlo North America, Terminology and Glossary: Oil Well Terms, Pennsylvania, Oil: Oil Well Drilling Science and Technology, USA 2002, flowmeterdirectory.com/flowmeter_terminology, (Oil Well Drilling Sci and Tech - Amer) {555}