Pumping shiny sucker card

        Among multitudinous sand control oil pumps, the structure of short pump barrel,long plunger ,pump down sand collecting and lateral oil feeding is widely used.(Long plunger is the most important and the most crucial part).By means of upward and downward travel of the plunger,the oil liquid is incessantly pumped to the ground surface via a two-way joint and a two stage standing valve.Meanwhile,a part of sand in the pipe that could not ba raised is settled into the sand collecting tail pipe.through the annular space of the pump barrel,two-way joint.