摘要
为解决常规通井规通井时油管液体外溢问题,研制了油管防溢通井规。通过阻流系统的自动开启和关闭,改变管柱的流道结构。利用流体力学方法,计算了阻流孔的直径及下钻时激动压力产生的阻力,推荐了弹簧的最大弹力。当阻流孔直径选用14.32 mm,以1.3 m/s速度通井时,油管不会返液;以0.2 m/s速度通井时,阻流系统能在激动压力作用下关闭;管柱静止后,25 N的弹簧弹力将阻流系统开启。现场8口井试验说明,通井时阻流系统工作正常,油管无井液溢出。油管防溢通井规的应用提高了通井时作业效率,减少了对环境的污染。
Overflow often occurs when drifting with a conventional drifting size gauge tool. A new drifting size gauge tool has been developed. It is equipped with a choking system to control the flowing channel of the tubing string by automatically opening and closing of the choke. Following fluid mechanics, first we calculated the diameter of the choke and the resistance caused by the exciting pressure during drilling, then we got the maximum spring force. It′s found that when the diameter of the choke was 14.32 mm, overflow would not appear when drifting at 1.3 m/s;when drifting at 0.2 m/s, the choke system would be closed at exciting pressure;and after the tubing string was at rest, a 25 N spring force would open the choke system. Field application in 8 wells has proved that the choking system can work normally without overflow. The overflow-proof drifting size gauge tool is effective to support drifting operation and reduces environmental pollution.
作者
马金良
王方祥
王颖
呼桂艳
范旭
MA Jinliang;WANG Fangxiang;WANG Ying;HU Guiyan;FAN Xu(Downhole Technical Service Company f CNPC Bohai Drilling Engineering Co.,Ltd.,Tianjin 300283,China)
出处
《油气井测试》
2020年第6期27-31,共5页
Well Testing
基金
中国石油集团渤海钻探工程有限公司井下技术服务分公司技术研发项目“新型通井规的研制与现场试验”(2019JXJF-11)。
关键词
试油
通井规
油管防溢
阻流系统
激动压力
弹簧弹力
磨阻
production test
well gauge
oil pipe anti overflow
choking system
exciting pressure
spring force
friction resistance
