One effective way is preferred pump barrel and plunger of materials and surface treatment processes.
其中一个有效的方法就是优选泵筒和柱塞的材料和表面处理工艺。
The barrel, plunger and standing valve of the pump were designed, improving the barrel's force conditions and reinforcing the screw thread's sealing performance and tensile strength.
该泵对泵筒、柱塞、固定阀做了设计，改善了泵筒受力状况，提高了螺纹的密封性能和抗拉强度。
The Weatherford STP helps you reduce sand damage by moving sand upward through the pump and away from the barrel/plunger interface.
STP可使砂粒向上移动，远离泵筒和泵塞泵接触面，从而减少砂粒引发的磨损。
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