How About A Lift- Ken Bailey
HOW ABOUT A LIFT? These five drawings show the progression of pumping equipment used to lift the oil to the surface in the Rangely field over its long history.
1) Shallow wells used "walking beams," pivoting in the middle like a see-saw, to pull the drill rod up and down from the underground pool by leverage. Regulating such a machine was difficult, however, -- weights could be stacked on the far end of the beam, but it was not as precise as optimum....
...until 2) I believe it was the Lufkin company that came up with the idea of mounting heavy counterweights on a crank that lifted arms on the far end of the beam -- like putting a fat kid on the far end of the see-saw with you when you were too light to lift the kid at the other end. But the size of pump was limited by the upper limit of how big the counterweights could become...
3) Bigger pumps came with the "air-balance" pumper, which pivoted at the end and used a big cylinder of compressed air to push the beam up and down in addition to the lifting arms.
4) the Lufkin Corporation finally combined both of these elements in the Grasshopper (Or, "Mark IV" as they call it, TM) which again uses rotating weights but on the end of a very long rotating crank that folds in on itself, and makes the pumper "squat" -- but in a way that can pull a lot of rod and lift a lot of oil!
5) The final step was the underground electric pump called the "submersible" -- only the control box is left on the surface to show oil is being pumped there! Rangely has had 'em all!