primary drilling

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primary drilling [′prī‚mer·ē ′dril·iŋ]

(engineering)

The process of drilling holes in a solid rock ledge in preparation for a blast by means of which the rock is thrown down.

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No references found			It's not a problem of it not being a good shale; it's just not thick enough," Ratchford said about portions of the Chattanooga Shale that lie beneath the primary drilling zone for the Fayetteville Shale in north-central Arkansas. Playing with rocks by Arkansas Business The new seismic program has enlarged the potential for the primary drilling prospect in the Ordovican, and also identified several new leads for the Acacus play. Madalena Announces Commencement of Drilling Operations in Tunisia by UMCI News (Potomac Falls, VA) The primary drilling target on the acquired acreage is the Hartshorne coal at approximately 3,500 to 4,000 feet. LEXINGTON RESOURCES CLOSES LEASE ON 440 ACRES IN COLD CREEK by Worldwide Energy			primary circuit primary circulation primary circulation areas primary clay primary coil Primary Colors primary compression primary compression failure primary consolidation primary constriction primary consumer primary contract primary control program Primary Cortex primary cosmic rays primary crater primary creep primary crusher primary culture primary cyclone primary decomposition primary detector primary dip primary distribution feeder Primary Domain Controller primary drilling primary election primary electron primary emission primary energy primary entrance primary excavation primary explosive primary extinction primary fabric primary fault primary fission products primary flat joint primary flow primary fluid primary focus primary frequency primary front primary fuel cell Primary Gas primary geosyncline primary gneiss primary gneissic banding primary great circle primary growth primary gun			Primary Developmental Education primary deviation primary diagnosis primary diagnosis primary digestion primary digestion primary digestion primary digestion Primary Digestive Tract Lymphoma Primary Digital Hierarchy primary dip Primary Direct Fire Control System Primary Direction of Fire primary disease primary distal RTA Primary distribution primary distribution feeder Primary Distribution List Primary Distribution Panel primary distribution site Primary Distributions Primary Docking Adapter Primary doctor Primary doctor Primary doctor Primary document Primary documents Primary Domain Controller Primary Domain Controller Primary Domain Controller Emulator primary drilling Primary Drinking Water Standard primary drive Primary Drive Motor primary drug action Primary Duty primary dysmenorrhea primary dysmenorrhea primary dysmenorrhea Primary Ear and Hearing Care Primary earnings per Primary education Primary education Primary Education Advisor Primary Education Development Primary Education Development Program Primary Education Improvement Project Primary Education Program Primary Education Reform Program primary effect Primary effusion lymphoma Primary effusion lymphoma Primary effusion lymphoma Primary effusion lymphoma primary election primary election primary election primary election Primary elections Primary elections Primary elections

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