When the well is shut-in, a plunger is dropped down the production string.

当关井时，柱塞沿生产管柱向下降落。

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Thereby the following measures are put forward: (1) simplifying the production string;

为此，结合生产实际提出了有效的防治措施：（1）简化井下生产管柱；

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Original production string acidizing is a new technology, which can greatly shorten the recycle of acidizing treatment and economize operating cost.

不动管柱简易酸化是一项较新的工艺，利用该技术可大大缩短作业周期、降低作业成本。

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This was the first "red flag" because a satisfactory cement job to the production string is fundamental to the safe operation on a go forward basis.

WSJ: The Oil Disaster Is About Human, Not System, Failure

But, over the past few days a string of gloomy steel production and iron ore price forecasts has trimmed the share prices of all iron ore miners with the potential for worse to come if the price projections are accurate.

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