PUMP JACK ASSEMBY FOR WELLS

摘要: PUMP JACK ASSEMBLY FOR WELLS One pair of actuating piston and cylinder assemblies are operatively connected to the polish or sucker rod pump extended retracted by hydraulic fluid. A further on underside thereof an accumulator that includes inert gas over oil with being supplied under adjustable control conditions from a source high pressure so these counteract weight system. On downstroke, is upper sides all four two supporting via accumulator. The support desired proportion assembly pumped thereby other accumulators provided in circuits cushion shock load at either end stroke pump. Automatically operated switch valves flow dividers speed respectively.