地下储气库注采管柱气密封螺纹接头优选

发布时间：2018-01-16 06:15

本文关键词：地下储气库注采管柱气密封螺纹接头优选　出处：《天然气工业》2017年05期 　论文类型：期刊论文

【摘要】：为解决国内地下储气库井注采管柱气密封螺纹接头选用混乱且适用性不清的问题,首先对现有标准和气密封试验数据进行统计比对分析,发现各种气密封螺纹接头的拉伸效率相同,但其压缩效率差异大且现有标准已不适用于储气库注采管柱气密封螺纹接头的选择,认为注采管柱气密封螺纹接头的选择必须考虑管柱载荷的交变;然后结合2口储气库井注采工况,基于管柱力学理论计算获得2种规格注采管柱的最大拉伸载荷和最大压缩载荷,对比已选用的气密封螺纹接头,重点研究了接头拉伸效率、压缩效率与管柱载荷之间的关系,提出了注采管柱气密封螺纹接头优选判据;进一步利用全尺寸实物复合加载试验机对2种规格注采管柱进行多周次气密封循环试验,试验结果证实了上述判据的合理性。所提出的优选判据不仅可以作为气密封螺纹接头优选的基本依据,而且还可以作为储气库井注采管柱设计的依据,并纳入了中国石油天然气行业标准。
[Abstract]:In order to solve the problem that the screw joint of injection and production string gas seal in domestic underground gas storage well is confused and the applicability is not clear, the existing standards and the test data of gas seal are analyzed by statistical comparison. It is found that the tensile efficiency of all kinds of gas seal thread joints is the same, but the compression efficiency is different and the existing standards are not suitable for the selection of gas storage gas storage pipe string gas seal thread joints. It is considered that the alternating load of pipe string must be taken into account in the selection of gas seal threaded joint of injection and production pipe string. Then combined with the injection and production conditions of 2 gas storage wells, the maximum tensile load and the maximum compression load of the two kinds of injection and production string were obtained based on the pipe string mechanics theory, and the selected gas seal threaded joints were compared. The relationship between joint tensile efficiency, compression efficiency and string load is studied emphatically, and the criterion of optimal selection of gas seal threaded joint for injection-production pipe string is put forward. Further more, the multi-cycle gas seal cycle test was carried out on two kinds of injection-production pipe string by using full-scale compound loading machine. The experimental results confirm the rationality of the above criteria. The proposed criteria can be used not only as the basic basis for the optimal selection of gas seal threaded joints, but also as the basis for the design of injection and production pipe string in gas storage wells. And into China's oil and gas industry standards.
【作者单位】：中国石油集团石油管工程技术研究院·石油管材及装备材料服役行为与结构安全国家重点实验室;中石化中原储气库有限责任公司;中国石油新疆油田公司工程技术研究院;
【基金】：中国石油天然气集团公司重大科技项目“储气库完整性关键技术研究”(编号:2015E-4006)
【分类号】：TE972
【正文快照】： 地下储气库的寿命周期在30年以上[1-2],储气库注采管柱承担着注气和采气的通道,地层压力系数并不像常规气井一样逐年衰减,而是一直保持在0.9左右,管柱内运行压力、温度等载荷随注采周期交替变化[3]。为了确保管柱的密封性,要求储气库注采管柱和生产套管柱必须选用气密封螺纹接

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