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An oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead' (left side), wal...
An oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead' (left side), walking beam, crank, and counterweight. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.





A high dynamic range, or HDR, image of an oil well pump jack in northeastern Colorado, showing motion of the pump, the end kn...
A high dynamic range, or HDR, image of an oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead' (left side), walking beam, crank, and counterweight. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.





An oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead' (right side), wa...
An oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead' (right side), walking beam, crank, and counterweight. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.





A high dynamic range, or HDR, image of an oil well pump jack in northeastern Colorado, showing motion of the pump, the end kn...
A high dynamic range, or HDR, image of an oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead' (right side), walking beam, crank, and counterweight. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.





An oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead', and walking bea...
An oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead', and walking beam. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.





High dynamic range, or HDR, image of an oil well pump jack in northeastern Colorado, showing motion of the pump, the end know...
High dynamic range, or HDR, image of an oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead' (left side), walking beam, crank, and counterweight. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.





An oil well pump jack in northeastern Colorado. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, ...
An oil well pump jack in northeastern Colorado. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.





An oil well pump jack in northeastern Colorado. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, ...
An oil well pump jack in northeastern Colorado. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.





An oil well pump jack and a natural gas flare tower. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper p...
An oil well pump jack and a natural gas flare tower. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names. A flare tower, also known as a flaring tower, is used to burn off excess natural gas at pump sites.





A high dynamic range, or HDR, image of an oil well pump jack in northeastern Colorado, showing motion of the pump, the end kn...
A high dynamic range, or HDR, image of an oil well pump jack in northeastern Colorado, showing motion of the pump, the end known as the 'horsehead' (left side), walking beam, crank, and counterweight. A pump jack is also known as a pumpjack, a pumping unit, a grasshopper pump, and a jack pump, among other names.





An aerial view of an oil well pump jack and a flare stack, which burns off excess natural gas, on eastern Colorado's plains.
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