带压作业三级注脂电缆动密封技术分析研究及应用
|
摘要
三级注脂电缆动密封是带压作业的关键技术,对三级注脂电缆动密封技术进行分析研究,为现场应用提供科学指导和建议。根据宾汉流体圆管层流及偏心圆环层流理论,建立了三种三级注脂电缆动密封系统注脂压力及排量关系式,优选了三级注脂电缆动密封系统,给出了注脂压力及排量计算方法,并进行了现场应用。实践表明,优选的三级注脂系统密封脂消耗最少,文章所述方法的计算结果可指导现场快速设定各级注脂压力,考虑起下电缆和电缆粗细不均的影响,注脂压力实际设置值较理论计算值提高2%~10%,能实现电缆可靠动密封。
The dynamic sealing of tri-stage grease injection cable is key to snubbing operations. It's necessary to analyze and study to provide scientific guidance and suggestions for field application. According to the laminar flow and eccentric annular laminar flow theories of Bingham fluid,the calculation equations of injection pressures and displacements are set up for three types of tri-stage grease injection systems. With the known parameters and the target sealing pressure,the value of tri-stage grease injection pressures and displacements are obtained. Field applications show that the preferred tri-stage grease injection system has the minimum grease consumption.The calculation results can guide the field engineer to decide actual injection pressures of grease pumps quickly. Considering the effects of different cable OD and cable tripping in and out,the actual grease injection pressures can be 2% ～ 10% higher than the theoretical calculations value,which will realize a reliable dynamic cable sealing.
The dynamic sealing of tri-stage grease injection cable is key to snubbing operations. It's necessary to analyze and study to provide scientific guidance and suggestions for field application. According to the laminar flow and eccentric annular laminar flow theories of Bingham fluid,the calculation equations of injection pressures and displacements are set up for three types of tri-stage grease injection systems. With the known parameters and the target sealing pressure,the value of tri-stage grease injection pressures and displacements are obtained. Field applications show that the preferred tri-stage grease injection system has the minimum grease consumption.The calculation results can guide the field engineer to decide actual injection pressures of grease pumps quickly. Considering the effects of different cable OD and cable tripping in and out,the actual grease injection pressures can be 2% ～ 10% higher than the theoretical calculations value,which will realize a reliable dynamic cable sealing.
引文
[1]陈国章.电缆高压动密封研究[J].石油钻采工艺,1987,9(2):53-60,86.
[2]李东雷.预置电缆智能分层注聚合物技术的研究与应用[J].石油机械,2016,44(10):93-96.
[3]李英松,钟卫平,边杰,等.过电缆封隔器胶筒耐压试验及接触应力测试[J].石油机械,2016,44(6):106-109.
[4]袁吉诚,黄智.水泥胶结测井带压作业技术[J].测井技术,1999,23(6):469-473.
[5]韩成才,朱林,赵兴民.油气井电缆注脂头压力控制方程的建立及应用[J].西安石油大学学报(自然科学版),2016,31(3):104-109.
[6]朱秀星,薛世峰,仝兴华,等.非常规水平井多簇射孔与分段压裂联作管串泵入控制模型[J].测井技术,2013,37(5):572-578.
[7]陈锋,姜德义,唐凯,等.欠平衡钻井条件配套的射孔工艺技术[J].测井技术,2006,30(1):22-24.
[8]陈家琅.水力学[M].北京:石油工业出版社,1985:140-153.
[9]赵振兴,何建京.水力学[M].北京:清华大学出版社,2010:80-86.
[10]吴疆.偏心环空中非牛顿液轴向层流流动规律[J].石油钻采工艺,1985,7(2):1-14.
[2]李东雷.预置电缆智能分层注聚合物技术的研究与应用[J].石油机械,2016,44(10):93-96.
[3]李英松,钟卫平,边杰,等.过电缆封隔器胶筒耐压试验及接触应力测试[J].石油机械,2016,44(6):106-109.
[4]袁吉诚,黄智.水泥胶结测井带压作业技术[J].测井技术,1999,23(6):469-473.
[5]韩成才,朱林,赵兴民.油气井电缆注脂头压力控制方程的建立及应用[J].西安石油大学学报(自然科学版),2016,31(3):104-109.
[6]朱秀星,薛世峰,仝兴华,等.非常规水平井多簇射孔与分段压裂联作管串泵入控制模型[J].测井技术,2013,37(5):572-578.
[7]陈锋,姜德义,唐凯,等.欠平衡钻井条件配套的射孔工艺技术[J].测井技术,2006,30(1):22-24.
[8]陈家琅.水力学[M].北京:石油工业出版社,1985:140-153.
[9]赵振兴,何建京.水力学[M].北京:清华大学出版社,2010:80-86.
[10]吴疆.偏心环空中非牛顿液轴向层流流动规律[J].石油钻采工艺,1985,7(2):1-14.