In this paper, the failure mechanism of plunger seals for injection pump used in oil field is investigated and the features of existing reciprocating seal structures are evaluated.
对大功率油田注水柱塞泵柱塞密封的失效机理进行了论述，分析了现有几种典型的密封结构。
2
A seal between the piston and the interior of the plunger prevents air or fluid from passing by the piston into the plunger.
在活塞和柱塞内部之间的密封件可防止空气或液体利用活塞而进入柱塞。
3
The outer-body diameter of the plunger is cut just under production tubing drift to provide the maximum seal while the plunger moves fr eely.