Oil and Gas wells automation with mechanical pumping. Pump off controllers and dynamometers cards. Portable dynamometer. Conventional pumping unit. Pump jack engines (single and multicylinder engines) for oil well pumping services. Heavy duty, low speed and natural gas/glp or diesel fueled. Beam gas compressor (anular compresor) and skid compressor. Training courses about different artificial production systems. Pulleys. Clutch and pto. Natural gas generators. Stuffing box packing rubbers with ring teflon.