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  2. Blowout preventer - Wikipedia

    en.wikipedia.org/wiki/Blowout_preventer

    Rams, or ram blocks, are of four common types: pipe, blind, shear, and blind shear. Pipe rams close around a drill pipe, restricting flow in the annulus (ring-shaped space between concentric objects) between the outside of the drill pipe and the wellbore, but do not obstruct flow within the drill pipe. Variable-bore pipe rams can accommodate ...

  3. Cold water pitting of copper tube - Wikipedia

    en.wikipedia.org/wiki/Cold_water_pitting_of...

    Copper tubes have been used to distribute potable water within building for many years and hundreds of miles are installed throughout Europe every year. The long life of copper when exposed to natural waters is a result of its thermodynamic stability, its high resistance to reacting with the environment, and the formation of insoluble corrosion products that insulate the metal from the ...

  4. Deoxidized steel - Wikipedia

    en.wikipedia.org/wiki/Deoxidized_steel

    The porosity eliminates the pipe found in killed steel and increases the yield to approximately 90% by weight. Semi-killed steel is commonly used for structural steel with a carbon content between 0.15 and 0.25% carbon, because it is rolled , which closes the porosity.

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  6. Kelly drive - Wikipedia

    en.wikipedia.org/wiki/Kelly_drive

    Simple diagram of a drilling rig and its basic operation. The kelly drive is #19. A kelly drive is a type of well drilling device on an oil or gas drilling rig that employs a section of pipe with a polygonal (three-, four-, six-, or eight-sided) or splined outer surface, which passes through the matching polygonal or splined kelly (mating) bushing and rotary table.

  7. Hydraulic ram - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_ram

    A hydraulic ram pump, ram pump, or hydram is a cyclic water pump powered by hydropower. It takes in water at one " hydraulic head " (pressure) and flow rate, and outputs water at a higher hydraulic head and lower flow rate.

  8. Ford Bronco - Wikipedia

    en.wikipedia.org/wiki/Ford_Bronco

    On November 1, 2019, an announcement was made for a spring 2020 reveal, intended for the 2021 model year. [56] Originally scheduled for a March 2020 unveiling, the Bronco was unveiled on July 13, 2020, following multiple delays, mostly in relation to the global COVID-19 pandemic ; [ 57 ] Ford unintentionally scheduled the unveiling for July 9 ...

  9. The long tailpipe - Wikipedia

    en.wikipedia.org/wiki/The_long_tailpipe

    The U.S. Department of Energy published a concise description of the problem: "Electric vehicles (EVs) themselves emit no greenhouse gases (GHGs), but substantial emissions can be produced 'upstream' at the electric power plant."

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