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· Reduce the power consumption effectively

· Suitable for heavy oil production

· Long and low stroke frequency

· Less adjustment of stroke length and stroke ratio

· Energy saving up to 20%. Compared with conventional pumping unit, counter balance torque change is more suitable with loading torque change so as to decrease the electric motor power

· Low peak torque, improve working condition of gear reducer and prolong its service life

. The speed of up/down stroke is changed to “up slow/down fast” mode which is suitable for heavy oil production 

· Belt transmission: Power is transmitted by a long life heavy-duty belt, whose elastic cushion effect absorbs impact in reverse action and results in uniform reciprocal movement of the rod string

· Long, slow strokes: Long stroke leads to high pump fill and less fluid impact; Low stoke means less wear on downhole equipment

· Fairly complete production supporting system ensures the unit to be used with big pumps for more fluid lift and small pumps for deep well applications