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  2. Hand pump - Wikipedia

    en.wikipedia.org/wiki/Hand_pump

    There are many different types of hand pump available, mainly operating on a piston, diaphragm or rotary vane principle with a check valve on the entry and exit ports to the chamber operating in opposing directions. Most hand pumps are either piston pumps or plunger pumps, and are positive displacement. [1]

  3. India Mark II - Wikipedia

    en.wikipedia.org/wiki/India_Mark_II

    A typical Mark II hand pump in India. The pump was designed in the 1970s in a joint effort between the Government of India, UNICEF, and The World Health Organization (WHO) to address the severe drought and a water shortage affecting India during that period and to prevent evacuation of villages to refugee camps. Prior to the pump's design, poor ...

  4. Multilevel groundwater monitoring systems - Wikipedia

    en.wikipedia.org/wiki/Multilevel_groundwater...

    The ports are connected using 3/4" NPT stainless couplings and 3/4" NPT steel drive pipe extensions. A Drive-Point Tip threads onto the first extension, or port, to be driven into the ground. The ports have a dual barbed stem that allows the connection of either 3/8" OD or 1/4" OD polyethylene or PTFE-lined tubing to create up to 3 or 6 ...

  5. Hydraulic cylinder - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_cylinder

    The "generator" side of the hydraulic system is the hydraulic pump which delivers a fixed or regulated flow of oil to the hydraulic cylinder, to move the piston. There are three types of pump widely used: hydraulic hand pump, hydraulic air pump, and hydraulic electric pump. The piston pushes the oil in the other chamber back to the reservoir.

  6. Production packer - Wikipedia

    en.wikipedia.org/wiki/Production_packer

    Rotation-set packer – Tubing rotation is used to set the packer to mechanically lock it in; a left-hand turn engages and a right-hand turn retrieves it. Hydraulic-set packers use fluid pressure to drive the cone behind the slips. Once set they remain set by the use of either entrapped pressure or a mechanical lock.

  7. Hydraulic pump - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_pump

    Fluid flow in an external gear pump. A hydraulic pump is a mechanical source of power that converts mechanical power into hydraulic energy (hydrostatic energy i.e. flow, pressure). Hydraulic pumps are used in hydraulic drive systems and can be hydrostatic or hydrodynamic. They generate flow with enough power to overcome pressure induced by a ...