PUMPJACK OF THE TELESCOPEHYDRO TYPE
of the world, is a pumpjack used for the mechanical method of extracting oil by a deepwell pump. ... of the pillars (16) and pistons (15) will increase. The number of the twoarm links (9) of a telescope depends on the value of the plunger stroke of a deepwell pump. The number of pump sections (21) and (22) depends on the