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  2. Soil nailing - Wikipedia

    en.wikipedia.org/wiki/Soil_nailing

    Solid bars are usually installed into pre-drilled holes and then grouted into place using a separate grout line, whereas hollow bars may be drilled and grouted simultaneously by the use of a sacrificial drill bit and by pumping grout down the hollow bar as drilling progresses. Kinetic methods of firing relatively short bars into soil slopes ...

  3. Boring (manufacturing) - Wikipedia

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

    The boring bar is the protruding arm of the machine that holds the cutting tool(s), and must be very rigid. [2] Because of the factors just mentioned, deep-hole drilling and deep-hole boring are inherently challenging areas of practice that demand special tooling and techniques. Nevertheless, technologies have been developed that produce deep ...

  4. Bar stock - Wikipedia

    en.wikipedia.org/wiki/Bar_stock

    Tube and pipe are similar, but have hollow centers and are traditionally not called "bar" in industrial usage. (However, a product called hollow bar, essentially tube but with custom-orderable OD and ID and thus custom wall thickness, is marketed for lathe bar work which can benefit from obviation of drilling and rough boring.)

  5. Core sample - Wikipedia

    en.wikipedia.org/wiki/Core_sample

    Rock core samples, the product of a diamond rig.A pied butcherbird perches nearby.. A core sample is a cylindrical section of (usually) a naturally-occurring substance. Most core samples are obtained by drilling with special drills into the substance, such as sediment or rock, with a hollow steel tube, called a core drill.

  6. Annular cutter - Wikipedia

    en.wikipedia.org/wiki/Annular_cutter

    An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal. An annular cutter, named after the annulus shape , cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center.

  7. Drilling rig - Wikipedia

    en.wikipedia.org/wiki/Drilling_rig

    There are different auger drilling methods, including hand auger drilling and hollow stem auger drilling. Hand auger drilling is a cost-effective method that's often used in areas with shallow soil, but it can be time-consuming and labor-intensive. Hollow stem auger drilling uses a large, hollow auger that removes soil as it drills.

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  9. Formation evaluation - Wikipedia

    en.wikipedia.org/wiki/Formation_evaluation

    It is cut with a "core barrel", a hollow pipe tipped with a ring-shaped diamond chip-studded bit that can cut a plug and bring it to the surface. Often the plug breaks while drilling, usually in shales or fractures and the core barrel jams, slowly grinding the rocks in front of it to powder.

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