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How does an oil jack pump work?

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Quick Answer

An oil jack pump works through a series of gears and a motor that lower a plunger into a certain depth and allow it to fill up with pumped fluid. The plunger is then closed off and raised with the same mechanics that lowered it so that the fluids that are inside the well cannot leave, according to the Massachusetts Institute of Technology.

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How does an oil jack pump work?
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Full Answer

An oil jack pump uses mechanical energy to lift oil out of a well. This is especially useful in cases where pressure is low and the oil would not be extractable through normal means. An oil jack pump has a motor that powers its gear box. This gear box increases the torque depending on the output of the motor itself. Then, a crank turns and lifts the pump's counterweight, which causes the plunger to submerge. The plunger submerges because it is attached to the beam pivot, which is in turn attached to a pitman arm. Several of the arms line up at this point, and the fluid can begin to pump. The device's plunger rises slightly during this process. Eventually, the plunger must be brought back up above the depth at which it was filled with oil. This is done through an upstroke, which also aligns all the joints on the oil jack pump.

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