欠平衡钻井浮力撇油装置的设计与应用

撇油装置是欠平衡钻井配套装备的关键设备 ,其作用是将井筒循环出来的原油与钻井液分离 ,恢复钻井液性能 ,保持钻井正常施工。自行设计的浮力撇油装置能有效地将原油与钻井液分离 ,及时排出分离出的原油 ;经过撇油后的钻井液 ,其性能良好 ,能安全、可靠地实施欠平衡钻井施工。两级漫流与二次分离独具特色 ,通过浮子选配来适应不同钻井液密度 ,特殊的循环系统保证了撇油室液面的相对稳定。浮力撇油装置的输入电源为三相 380V/5 0Hz ,输入功率 70kW ,最大处理量 2 0 0m3/h。模拟试验和现场应用表明 ,该浮力撇油装置使用效果良好 ,能满足欠平衡钻井施工的要求

A new oil-mud separator for underbalanced drilling

In underbalanced drilling, oil-mud separators are used to separate the oil in the wellbore from the drilling fluid so as to restore the property of the drilling fluid. A new oil-mud separator is developed. It realizes effective oil-mud separation by means unique ~two-stage sheetflood and twice separation,and it can be adaptable to drilling fluid with various densities by reasonable selection of floaters. Its special circulation system ensures the relative stability of the liquid level of the oil removal chamber. The separator adopts power supply of 380 V / 50 Hz, with a power input of 70 kW. Its maximum handling capacity is 200 m3/h. Field use proves the separator has good performance and can meet the demand of the underbalanced drilling.