欠平衡钻井液气分离器的研制与应用

欠平衡钻井技术有利于防止钻井液漏失、能及时发现和保护油气层 ,并能提高机械钻速等。但由于欠平衡装备价格昂贵、制约了这一技术的发展。鉴于这种状况 ,自行研制了一台适应欠平衡钻井施工的重力型液气分离器。这种分离器的关键参数是单位时间内能够分离液体与气体的体积 ,将液气分离量主腔容积、承受内压强度和钻井液最大处理量分别设计为 8m3、1 2MPa和 2 70m3/h ,气体最大处理量设计为 1540 0m3/h。经模拟试验和现场应用情况表明 ,研制的液气分离器脱气效果良好 ,能满足欠平衡钻井需要。

A new gas-fluid separator for underbalanced drilling

A new gas-fluid separator for use in underbalanced drilling is developed. The key parameters for this separator is the handling capacity, i.e. the volumes of the fluid and gas separated in unit time. The rated cubage of the separator, internal pressure bearing capacity and maximum drilling fluid handling capacity are separately 8m3, 1.2MPa and 270m3/h, the maximum gas treatment capacity is 15400m3/h. The simulation test and field use show that, the new separator has good performance in separating gas from drilling fluid, it can meet the demand of underbalanced drilling.