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  2. Knob-and-tube wiring - Wikipedia

    en.wikipedia.org/wiki/Knob-and-tube_wiring

    For several decades, electricians could choose between K&T wiring, conduit, armored cable, and metal junction boxes. The conduit methods were known to be of better quality, but cost significantly more than K&T. [2] In 1909, flexible armored cable cost about twice as much as K&T, and conduit cost about three times the price of K&T. [6] Knob and ...

  3. Tubing hanger - Wikipedia

    en.wikipedia.org/wiki/Tubing_hanger

    A tubing hanger is a component used in the completion of oil and gas production wells. It is set in the tree or the wellhead and suspends the production tubing and/or casing. Sometimes it provides porting to allow the communication of hydraulic, electric and other downhole functions, as well as chemical injection. It also serves to seal-in the ...

  4. Completion (oil and gas wells) - Wikipedia

    en.wikipedia.org/wiki/Completion_(oil_and_gas_wells)

    Electrical Submersible Pumps, or ESPs, are installed at the bottom of the production tubing or inside the production tubing (Through Tubing ESP). Being electrically powered, ESPs require an electrical communications conduit to be run from surface, through a specialized wellhead and tubing hanger, to provide the required power to function.

  5. Electrical conduit - Wikipedia

    en.wikipedia.org/wiki/Electrical_conduit

    An electrical conduit is a tube used to protect and route electrical wiring in a building or structure. Electrical conduit may be made of metal, plastic, fiber, or fired clay. Most conduit is rigid, but flexible conduit is used for some purposes. Conduit is generally installed by electricians at the site of installation of electrical equipment.

  6. Strut channel - Wikipedia

    en.wikipedia.org/wiki/Strut_channel

    Cross section diagram of standard strut channel. Basic strut channel comes in the open box section 1 + 5 ⁄ 8 in (41 mm) square. A half height 1 + 5 ⁄ 8 in × 13 ⁄ 16 in (41 mm × 21 mm) version is also available, used mostly where mounted directly to a wall as it has significantly less stiffness and ability to carry loads across an open space or brace.

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    mail.aol.com

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  8. Junction box - Wikipedia

    en.wikipedia.org/wiki/Junction_box

    A small metal, plastic or fiberglass junction box may form part of an electrical conduit or thermoplastic-sheathed cable (TPS) wiring system in a building. If designed for surface mounting, it is used mostly in ceilings, concrete or concealed behind an access panel—particularly in domestic or commercial buildings [2].

  9. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    THF – tubing hanger flange; THF – tetrahydrofuran (organic solvent) THP – tubing hanger pressure (pressure in the production tubing as measured at the tubing hanger [citation needed]) THRT – tubing hanger running tool; THS – tubing head spool; TIE – tie-in log; TIH – trip into hole; TIS – tie-in spool; TIT – tubing integrity test