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  2. Underground pneumatic boring - Wikipedia

    en.wikipedia.org/wiki/Underground_pneumatic_boring

    Tool speed is controlled by manipulating the air supply to the tool. This air supply valve is outside the tool and remains accessible to the operator. As the tool pounds through the ground, it compresses the soil. This compaction maintains the same diameter as the tool and leaves the borehole through which the product is passed.

  3. Block and bleed manifold - Wikipedia

    en.wikipedia.org/wiki/Block_and_bleed_manifold

    A Block and bleed manifold is a hydraulic manifold that combines one or more block/isolate valves, usually ball valves, and one or more bleed/vent valves, usually ball or needle valves, into one component for interface with other components (pressure measurement transmitters, gauges, switches, etc.) of a hydraulic system. The purpose of the ...

  4. Pneumatic tool - Wikipedia

    en.wikipedia.org/wiki/Pneumatic_tool

    Pneumatic tools are rated using several metrics: Free Speed (rpm), Air Pressure (psi/bar), Air Consumption (cfm/scfm or m3/min), Horse Power (hp), and spindle size. Each individual tool has its own specific requirements which determine their compatibility with air compressor systems.

  5. Bleed screw - Wikipedia

    en.wikipedia.org/wiki/Bleed_screw

    Bleed screw key Bleed screw key in use at a domestic radiator. On a home radiator unit, the bleed screw can be opened, usually by means of a key, to allow unwanted air to escape from the unit. Bleed screws are also found on some pump types fulfilling a similar purpose. They are most often located at the top of the radiator on the side of the ...

  6. Trencher (machine) - Wikipedia

    en.wikipedia.org/wiki/Trencher_(machine)

    These tools can be easily changed manually, and adjusted to allow different cutting widths on the same wheel. The teeth are placed in a semi-spherical configuration to increase the removal of the materials from the trench. The teeth are made of high strength steel (HSLA steel, tool steel or high speed steel) or cemented carbide. When the ...

  7. Well kill - Wikipedia

    en.wikipedia.org/wiki/Well_kill

    It involves repeatedly pumping in small quantities of kill mud into the well bore and then bleeding off excess pressure. It works on the principle that the heavier kill mud will sink below the lighter well bore fluids and so bleeding off the pressure will remove the latter, leaving an increasing quantity of kill mud in the well bore with ...

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  9. Blowout preventer - Wikipedia

    en.wikipedia.org/wiki/Blowout_preventer

    In drilling a typical high-pressure well, drill strings are routed through a blowout preventer stack toward the reservoir of oil and gas. As the well is drilled, drilling fluid , "mud", is fed through the drill string down to the drill bit, "blade", and returns up the wellbore in the ring-shaped void, annulus , between the outside of the drill ...

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