loss of travel

The experiments showed that the stroke loss of all experimental wells dropped .

增抽扶正器具有减少冲程损失、减少漏失、抽油杆扶正以及实现分段举升,减轻抽油杆的疲劳负荷等功能。

During oil recovery by rod pump, owing to the elastic stretching and shrinking of the tubing string, the stroke loss of the subsurface pump reaches 10%.

在有杆泵抽油过程中，因油管弹性伸缩，抽油泵冲程损失达10％以上。

The primary causes which make the oil pump efficiency low were analysed from the influences of pump filling degree,stroke loss and dropout.

针对江苏油田抽油泵泵效现状,通过对泵充满程度、冲程损失以及漏失三方面影响因素进行分析,结合油井生产状况,分析造成油井抽油泵泵效偏低的主要原因。