针对高含砂油井存在的砂埋柱塞、砂卡泵和漏失严重等问题，研制了自旋式防砂泵。

The self-cyclone de-sander is developed for treatment of sand problems in high sand content well.

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配置优良、专业的不锈钢化工专用泵，自动回流系统、卡泵保护功能、流量稳定、耐用、喷涂量精确。

The good, professional stainless steel chemical-specific pumps, automatic return systems, the pump-block protection function, flow stability, durability, spraying the amount of precision.

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之后司钻上提整个钻柱，移去卡瓦，在开泵并旋转的同时小心地下放钻柱，当钻头接触到井底之后，重新开始钻进。

The driller then picks up the entire drillstring to remove the slips, carefully lowers the drillstring while starting the pumps and rotary, and resumes drilling when the bit touches bottom.

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