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  2. Deep hole drilling - Wikipedia

    en.wikipedia.org/wiki/Deep_hole_drilling

    Deep hole drilling also differs from normal drilling in that, depending on the drilling process and the drilling diameter, cooling lubricant must be pumped to the cutting edges in large quantities and under high pressure. This ensures good cooling and at the same time good lubrication of the contact areas between the workpiece and the cutting ...

  3. Back Forty Mine - Wikipedia

    en.wikipedia.org/wiki/Back_Forty_Mine

    The project was originally proposed as a 750-foot deep (230 m) open-pit mine on 83 acres (34 ha) to extract gold, zinc and other metals. An on-site processing mill will crush and refine minerals and ores through flotation, separation and the use of cyanide. [ 2 ]

  4. Boring (earth) - Wikipedia

    en.wikipedia.org/wiki/Boring_(earth)

    Boring is drilling a hole, tunnel, or well in the Earth. It is used for various applications in geology, agriculture, hydrology, civil engineering, and mineral exploration. Today, most Earth drilling serves one of the following purposes: return samples of the soil and/or rock through which the drill passes; access rocks from which material can ...

  5. Eagle Mine (Michigan) - Wikipedia

    en.wikipedia.org/wiki/Eagle_Mine_(Michigan)

    Eagle is a decline-accessed underground mine, primarily utilizing long hole stoping for production. Surface construction at the mine started in 2010, with underground construction taking place in 2011. Production commenced in September 2014 ahead of schedule and on budget.

  6. Well drilling - Wikipedia

    en.wikipedia.org/wiki/Well_drilling

    Well drilling is the process of drilling a hole in the ground for the extraction of a natural resource such as ground water, brine, natural gas, or petroleum, for the injection of a fluid from surface to a subsurface reservoir or for subsurface formations evaluation or monitoring.

  7. Category:Deepest boreholes - Wikipedia

    en.wikipedia.org/wiki/Category:Deepest_boreholes

    the deepest boreholes (Core drill, for geological exploration), and; the longest boreholes ( Extended Reach Drilling , for oil production). Pages in category "Deepest boreholes"

  8. Borehole mining - Wikipedia

    en.wikipedia.org/wiki/Borehole_mining

    Borehole mining tool and technology principle schematic. Borehole Mining (BHM) is a remote operated method of extraction (mining) of mineral resources through boreholes based on in-situ conversion of ores into a mobile form (slurry) by means of high pressure water jetting (hydraulicking).

  9. Offshore oil and gas in the United States - Wikipedia

    en.wikipedia.org/wiki/Offshore_oil_and_gas_in...

    The only state that has allowed oil and gas drilling beneath the Great Lakes in recent years has been Michigan, and that only by directional drilling from onshore surface locations. All oil and gas drilling, either on or directionally beneath the Great Lakes, has been banned by federal law since 2002.