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  2. Borehole - Wikipedia

    en.wikipedia.org/wiki/Borehole

    For many years, the world's longest borehole was the Kola Superdeep Borehole in Russia. From 2011 until August 2012 the record was held by the 12,345-metre (40,502 ft) long Sakhalin-I Odoptu OP-11 Well, offshore the Russian island Sakhalin. [11] The Chayvo Z-44 extended-reach well took the title of the world's longest borehole on 27 August 2012 ...

  3. Pore pressure gradient - Wikipedia

    en.wikipedia.org/wiki/Pore_pressure_gradient

    Using the figures above, we can calculate the maximum pressure at various depths in an offshore oil well. Saltwater is 0.444 psi/ft (2.5% higher than fresh water but this not general and depends on salt concentration in water) Pore pressure in the rock could be as high as 1.0 psi/ft of depth (19.25 lb/gal)

  4. Ark: Survival Evolved - Wikipedia

    en.wikipedia.org/wiki/Ark:_Survival_Evolved

    Ark: Survival Evolved (stylized as ARK) is a 2017 action-adventure survival video game developed by Studio Wildcard. In the game, players must survive being stranded on one of several maps filled with roaming dinosaurs , fictional fantasy monsters, and other prehistoric animals, natural hazards, and potentially hostile human players.

  5. Wellhead - Wikipedia

    en.wikipedia.org/wiki/Wellhead

    The primary purpose of a wellhead is to provide the suspension point and pressure seals for the casing strings that run from the bottom of the hole sections to the surface pressure control equipment. [1] While drilling the oil well, surface pressure control is provided by a blowout preventer (BOP).

  6. Drilling fluid - Wikipedia

    en.wikipedia.org/wiki/Drilling_fluid

    Hydrostatic pressure also controls the stress from tectonic forces, which can render wellbores unstable even when formation fluid pressure is balanced. If formation pressures exposed in the open borehole are subnormal, air, gas, mist, stiff foam, or low-density mud (oil base) can be used.

  7. Watertable control - Wikipedia

    en.wikipedia.org/wiki/Watertable_control

    In geotechnical engineering, watertable control is the practice of controlling the height of the water table by drainage.Its main applications are in agricultural land (to improve the crop yield using agricultural drainage systems) and in cities to manage the extensive underground infrastructure that includes the foundations of large buildings, underground transit systems, and extensive ...

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Groundwater recharge - Wikipedia

    en.wikipedia.org/wiki/Groundwater_recharge

    In 2007, on the recommendations of the International Water Management Institute, the Indian government allocated ₹ 1,800 crore (equivalent to ₹ 54 billion or US$650 million in 2023) to fund dug-well recharge projects (a dug-well is a wide, shallow well, often lined with concrete) in 100 districts within seven states where water stored in ...