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- The overseas field application shows that oil base muds with densities greater than 1.6 g/cm3 have lower equivalent circulation density(ECD) if manganese tetraoxide is used as the weighting agent,instead of barite. 国外现场应用表明;对于密度在1.;6 g/cm3以上的加重油基钻井液;用四氧化锰代替重晶石粉加重;能降低钻井液的当量循环密度。
- Drilling fluid circulating temperature plays a very important role in predicting the equivalent circulating density of drilling fluids and in determining safe density windows. 钻井液循环温度是预测钻井液循环当量密度、确定钻井安全密度窗口的重要影响因素之一。
- equivalent circulation density 循环当量密度
- Keywords drilling fluid additives;manganese tetraoxide;weighting materials;drilling fluids;equivalent circulation densities; 钻井液添加剂;四氧化锰;加重材料;钻井液;当量循环密度;
- A dime is equivalent to ten pennies. 一角等于十分。
- Pound notes have been withdrawn from circulation. 一英镑面值的钞票已停止流通。
- Harvey discovered the circulation of the blood. 哈唯发现了血液循环。
- The dividend pay is equivalent to one quarter of the pretax profit. 所付股息相当于税前利润的四分之一。
- We observed the circulation of blood in frogs. 我们观察了青蛙的血液循环。
- The old coins have been withdrawn from circulation. 旧硬币已经收回不再流通了。
- A dime is the equivalent of two nickels. 一角硬币等于两个五分镍币。
- A meter is equivalent to 39.37 inches. 一米相当於三十九点三七英寸。
- Many forged notes are in circulation. 许多假钞在流通。
- This magazine has a large circulation. 这本杂志发行量很大。
- These ideas have been in circulation for some time. 这些想法已经流行了一段时间。
- His reply is equivalent to a refusal. 他的回答等於是拒绝。
- A note equivalent to two whole notes. 二全音符相当于两个全音符的一个音符
- The density of population in this city is very high. 这个城市的人口密度非常高。
- What is 5 equivalent to in French francs? 5英镑相当於多少法国法郎?
- After a month in hospital, she is back in circulation. 住了一个月的医院后，她又重新活跃起来了。
