The effective method preventing and reducing the defects is to decrease the solid particles for the pollution of hydraulic oil and to avoid the impact and overhead of system.
减少固体颗粒对液压油的污染，防止液压冲击和系统发热是防止和减少系统故障行之有效的方法。
Using under balance pressure drilling technique aims at preventing the mud loss and pollution of Palaeozoic limestone reservoir in this area and therefore protecting oil reservoir.
该井四开钻探过程中成功地采用欠平衡钻井技术钻穿寒武系凤阳山组，以防止该区古生界灰岩储层发生井漏及储层污染，从而保护油层。
This article mainly analysis the background, the reasons and the damage, and put porward some steps and strategies on preventing and controlling the oil pollution.
本文着重分析了我国近海石油污染加剧的背景和原因、海洋石油污染的危害以及防治海洋石油污染的方法与对策。
The effect of oil pollution to the Marine ecological environment is analyzed. Then, some prevent measures such as preventing the leakage are offered.
分析了石油污染对海洋生态环境的影响，提出了预防泄漏措施。
The effect of oil pollution to the Marine ecological environment is analyzed. Then, some prevent measures such as preventing the leakage are offered.
分析了石油污染对海洋生态环境的影响，提出了预防泄漏措施。
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