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→Beam pumps
==Beam pumps==
==Beam pumps==
Beam pumping systems were one of the first type of artificial lift used in the oil field and are still the most widely used means of artificial lift. A beam pump system lifts fluid by reciprocating a rod string that activates a positive displacement pump. The positive displacement pump is seated in the tubing string and set below the operating fluid level in the well (Figure 4). A surface pumping unit provides the power to reciprocate the rod string.
[[file:artificial-lift_fig4.png|thumb|{{figure number|4}}Beam pumping system. (From <ref name=pt09r5 />.)]]
[[file:artificial-lift_fig4.png|thumb|{{figure number|4}}Beam pumping system. (From <ref name=pt09r5 />.)]]
Beam pumping systems were one of the first type of artificial lift used in the oil field and are still the most widely used means of artificial lift. A beam pump system lifts fluid by reciprocating a rod string that activates a positive displacement pump. The positive displacement pump is seated in the tubing string and set below the operating fluid level in the well ([[:file:artificial-lift_fig4.png|Figure 4]]). A surface pumping unit provides the power to reciprocate the rod string.
The surface pumping unit is made up of two primary components: a prime mover (motor) and a walking beam connected to a pivotal post. The walking beam operates like a seesaw on the pivotal post, providing a reciprocating motion to the rod string. On each upward stroke of the rod string, a volume of produced wellbore fluids is lifted upward in the tubing string toward the surface. The capacity of the beam pumping system is set by the size of the downhole pump, the stroke length of the rod string, and the speed at which the rod string is reciprocated. When pump capacity exceeds wellbore fluid entry, the surface pumping unit can be set up to run intermittently by shutting down the pumping unit for a set period of time.
The surface pumping unit is made up of two primary components: a prime mover (motor) and a walking beam connected to a pivotal post. The walking beam operates like a seesaw on the pivotal post, providing a reciprocating motion to the rod string. On each upward stroke of the rod string, a volume of produced wellbore fluids is lifted upward in the tubing string toward the surface. The capacity of the beam pumping system is set by the size of the downhole pump, the stroke length of the rod string, and the speed at which the rod string is reciprocated. When pump capacity exceeds wellbore fluid entry, the surface pumping unit can be set up to run intermittently by shutting down the pumping unit for a set period of time.