preventer

While underbalance drilling spreads greatly, rotating blowout preventer, as a kind of high technical product, is the crucial equipment to control well pressure.

国内欠平衡钻井普遍实施,要用到的旋转喷器是关键设备,技术含高。

A strainer is recommended to be installed ahead of the backflow preventer to prevent the fouling of the check assembly and resulting spillage from the valve during repressurization.

建议在回流阀前安装一个过滤器，止由于止回阀总成受到污染而导致这种阀门在再增压期间产生泄漏。