铜质螺旋桨冲砂时必须采用非金属磨料。
Non-metal abrasive should be adopted when copperpropeller is sand washing.
冲砂后螺旋桨表面会有很多的灰尘和磨料的残留。
There will be a lot of dust and abrasive residueon the surface of the propeller after sand washing.
冲砂是通过循环流体将油层中砂粒带到地面的方法。
Sand Cleanout is a method which brings sand particles up to the surface by circulating a liquid.
本文给出了计算低压地层水平井冲砂的参数计算方法。
The parameter calculation method in well sand cleanout in lower pressure formation is given.
研究低压地层水平井冲砂具有重要的经济价值和现实意义。
The study on well sand cleanout in lower pressure formation is of important economic value and practical significance.
因此，研究采用保护油层封隔器冲砂技术，来解决这一问题。
Therefore, reservoir protection packer sand washing technique is adopted to solve this problem.
针对循环水冲砂工艺存在的不足，提出了负压捞砂工艺技术。
In view of the shortcoming of sand washing technology with recycled water, the negative-pressure sand fishing technology is put forward.
分析了锡青铜叶轮铸件出现的缩孔、气孔、冲砂等缺陷的原因。
The reasons resulting in the shrinkage porosity, gas-hole and impacted sand in bronze castings were analyzed.
型砂中加入a淀粉可以提高型砂的抗风干能力，减少铸件冲砂缺陷。
Add a of starch sand sand can improve the anti drying ability, reduce sand casting defects.
双层管柱提供了新的液流通道，同时加快了携砂液返速，提高冲砂效率。
Dual string provides a new fluid circulation way and accelerates the velocity of liquid quickly, improving the efficiency.
更为严重的是，井底砂粒可能随冲砂液重新返入油层，并对油层造成伤害。
What is worse, sand particles may even flow back into the formation to cause damage.
水平井防砂管内旋转射流冲砂解堵机理与试验，石油钻采工艺，2008。
Surface Experiment of Abrasive Water Jet Perforation Assisting Fracturing, Petroleum Science and Technology, 2008
冲砂区域尽量避免大面积打磨，若打磨面积所占比例过高，必须重新冲砂；
Large acreage grinding should be avoided at blasting area, otherwise, re-blasting is necessary.
由于地层漏失严重，作业冲砂施工过程中工作液无法将井筒内的砂柱携出地面。
For serious formation leakage, the working fluid can't carry sand column to ground surface in the process of sand washing.
以小孤山水电站枢纽冲砂闸闸门上下游流场为实际算例，对计算结果进行了分析。
Flow field of upstream and downstream of Xiao gushanwater power station hinge discharge sluice were practical calculated examples.
水平井钻井、砾石充填及冲砂等作业都涉及到固液两相流动的固体颗粒起动问题。
Incipient motion of solid grain in solid-liquid two \ | phase flow is often concerned in many petroleum technologies, such as horizontal drilling, gravel-packing and sand washing.
立足油田清洁生产，对修井冲砂工艺、工具和配套技术进行优化，应用后效果显著。
Based on clean production in oilfield, the technique of clampoff in well pulling, instruments and matching technique were optimized with a significant effect.
采砂船上不仅有挖斗，而且还有冲砂和分选设备，以使较重的有用矿粒因重力而沉积。
The dredges not only have scoops but also devices for washing sand or gravel and screening it so that gravity settles the heavier and more valuable particles.
泡沫流体广泛应用于油井的冲砂洗井作业中，携砂能力是衡量其性能的一项重要指标。
Foam fluid is widely used in sand-flushing operations in oilfields, while the prop-carrying capability of foam fluid is very important.
当油井进入生产后期后，许多疏松砂岩油藏出砂现象非常普遍，这时候需要对油井进行冲砂作业。
When the production tail of a well comes, sand production is very common in sandstone reservoirs. It is necessary to proceed a cleanout service.
水平井冲砂既要做到将砂粒冲出地面又不能在井底对储层造成新的污染，这就要求采取合理的水平井冲砂液流量和冲砂压力。
Sand washing in horizontal Wells requires that the sand are carried out of surface without new damage on pay zones. This requires the reasonable flow rate and pressure in horizontal Wells.
针对处理井下油管砂埋遇卡事故作业中出现的技术问题，在分析井下管柱结构及砂粒的水力计算的基础上，提出了空心抽油杆冲砂工艺处理措施。
In accordance with downhole tubing sticking by sand burial accident, this paper proposes hollow rod sand washing after analysis of downhole string structure and hydraulic calculation of sand grain.
针对处理井下油管砂埋遇卡事故作业中出现的技术问题，在分析井下管柱结构及砂粒的水力计算的基础上，提出了空心抽油杆冲砂工艺处理措施。
In accordance with downhole tubing sticking by sand burial accident, this paper proposes hollow rod sand washing after analysis of downhole string structure and hydraulic calculation of sand grain.
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