A pumping assembly of oil 10 having a flow of production adjustable and a travel per minute of great length, of short length, comprises a rod of the pumping animee back -, - comes in a hole of the well, a description of the balancing for reduce the power necessary for pumping the oil by the rod of the pump, a mechanism for driving the rod of a pumping motion -, - comes and of the mechanism of balancing, comprising a first cable and a second cable 34 to cause the rod of the pumping animee back -, - comes and the mechanism of balancing, respectively, a speed control device for the drive mechanism, and a locking mechanism for a short for the drive mechanism.
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