Pumpjacks are limited to a maximum output of 100 crude oil per cycle, achieved by an oil field with more than 999% yield. However, such a high yield is fairly rare
For 1 pumpjack on a depleted oil field with two lvl 3 speed modules and 6 beacons with each two lvl 3 speed modules :
2 * ( 2 * 0,5 ) + 2 * ( 6 * ( 2 * 0,5 ) 0,5 + 1 ) = 10 Crude oil per 1 second.
Assuming that there will be always 2 modules equipped in pumpjack and beacons, formula can be shortened :
2 + 2 * ( 6 * 0,5 + 1 ) = 10 Crude oil per 1 second