• Saturday, May 9, 2015

    Jet pump artificial lift

    JET PUMP

    Jet pump artificial lift

    Is ahydrulic pump where the pump is transmited from the surface equipment to the 
    "subsurface pump by means of fluid called"power fluid

    Concept of jet pump

    Bernollws equation

    {v^2 \over 2}+gz+{p\over\rho}=\text{constant}

    There is an anverse proportion between P&V

    Continvity equation

    There is on inverse proportion between A&V


    The jet pump installation may be



    Jet pump artificial lift


    Free installion insid atubing

    Fixed at the bottom of the tubing

    Lower&lifted by wire line

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    Surface equipment of jet pump


    Power fluid tank

    Surface pump

    Manifold

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    Sub surface equipment of jet pump 


    Jet pump artificial lift

    Nozzel

    Throat or mixing tube

    Diffuser

    Production inlet chamber

    note: the length of jet pump from 60-70 cm

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    power fluid



    May be oil or water 

    Advantage of using the water as apower fluid

    Water is prefer from the safty&environmental point of view 

    Required lower surface pressure

    Dis advantage of using the water as apower fluid

    Additional cost due to chemicals addition to water to improve its properties mainly its lubricity

    Advantage of using oil as apower fluid


    Increase the pump life due to the oil viscosity

    Reduce maintance jobs due to oil viscosity

    If the well produce heavy viscous crude ,light oil may be used as apower fluid to mixed with heavey to facilitate its production and transportation

    Dis advantage of using oil as apower fluid

    When the oil is used as power fluid may cause some confusion in interpretation of the well test results,therfore the power 
    (fluid (in&out
    should be accuratly measured to determine the actual production rate from the test

    The operation depend on

    High pressure of power fluid with low velocity which pass through nozzle which created very very high velocity and very very low pressure then mixed with production fluid (low 
    (velocity&increase pressure
    which required to lifting the crude oil to the surface

    Advantage and dis advantage of jet pump

    Advantage of jet pump

    Setting depth is limited

    Can handle solids&corrosive fluids

    Can be run in crooked holes due to it has small lengh &no moving parts

    Can fits in all bottom hole assemblies

    Applicable in off shore

    Handle high production rate

    Applicable to multiple completion

    Can handle gassy production,low gravity and high pour point crude oil

    Can use gas or electricity as apower source 

    Unobtrusive in urban location


    Dis advantage of jet pump


    Power oil system is fire hazard

    Power fluid used is missing cost

    Design system is more complex

    Pump may be cavitate under acertain condition

    Relatively inficient lift method