摘要
渤海某油田作为中国海上油田应用永磁电机驱动潜油电泵油井的试点单位,在应用过程中发现,潜油电泵油井停机后会因油井井筒内液柱倒流等因素而导致永磁电机转子被动旋转,进而自发电产生数百伏特的电动势,使整个油井电控系统带电,极易引发人员触电伤害及油井地面设备损坏事故。为最大限度降低该问题带来的风险,开发安全隔离箱技术,并根据实际使用情况优化该技术,实现井下永磁电泵机组与地面变压器和变频器等油井附属设备自动、安全隔离,提高了该设备的可靠性,缩减了该设备的空间占用。
An oilfield in Bohai Sea is a pilot unit of the application of permanent magnet motor to drive electric submersible pump well in China’s offshore oilfields.During the application process,it was found that the permanent magnet motor rotor would passively rotate after the shutdown of the electric submersible pump well due to the backflow of liquid column in the wellbore and other factors,which would generate hundreds of volts(induced electromotive force),and energize the entire electrical control system of the oil well.The phenomenon would possibly lead to the accident such as personnel electrocuted or oil well surface equipment damaged.In order to minimize the risks caused by this issue,a safety isolation box technology was developed and optimized in the actual usage process,which realized the automatic and safe electrical isolation between the downhole permanent magnet electric pump unit and the ground transformer and frequency converter and other oil well auxiliary equipment,improving the reliability of the equipment and reducing the space occupation of the equipment.
作者
李洪涛
LI Hongtao(Caofeidian Operation Company,CNOOC<China>Co.,Ltd.,Tianjin 300459,China)
出处
《天津科技》
2024年第5期45-49,共5页
Tianjin Science & Technology
关键词
海上油田
潜油电泵
永磁同步电机
安全隔离箱技术
offshore oilfield
electrical submersible pump
permanent magnet synchronous motor
safety isolation box technology
