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热采工况下钛合金筛管性能计算与实验研究
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1.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国石油集团石油管工程技术研究院,陕西西安;2.中国石油辽河油田公司钻采工艺研究院;3.中国石油集团工程技术研究院有限公司;4.中世钛业有限公司

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国家科技重大专项“深井超深井高效快速钻井技术及装备”(编号: 2016ZX05020)。


Calculation and Full-size Experimental Research on Performance of Titanium Alloy Screen Pipe under Thermal Recovery
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    摘要:

    钛合金材料由于具有高的比强度,低弹性模量,优异的机械性能、耐高温性能和耐腐蚀性能,成为下一代解决稠油热采工况下高套损率的优选材料,但在热采工况下钛合金割缝筛管的性能还缺乏研究。本文在模拟辽河油田稠油热采典型工况条件下,使用有限元计算和实物试验相比对的方法,对钛合金筛管理化性能、轴向热变形、轴向热应力、大狗腿度下筛管及割缝形貌变化规律等进行系统研究,结果表明,钛合金材质的筛管在热采工况下具有较好的强度和韧性,350℃热采工况下钛合金筛管的热应力只有钢制金属网布筛管和复合筛管的19.3%和20.4%,经过7轮次的热采温度循环,在350℃热采温度下钛合金筛管的轴向伸长率仅为钢制筛管的58.7%-60.4%,在20°/30米的大弯曲度及350℃高温下,钛合金筛管抗变形能力优异,最大椭圆度只有4.13%,平行割缝保持完好且防砂能力优于同规格钢制筛管,基于本研究认为,钛合金材质的筛管及套管可以有效的降低热采管柱在热采工况中的轴向热应力、伸长量,并且具有较高的耐高温性能和抗疲劳性能,在热采工况极端弯曲条件下抗变形能力好,是解决目前我国稠油热采现场高套损问题的有效方法和发展方向之一,研究结果为钛合金筛管的设计和使用提供重要的技术参考。

    Abstract:

    Stem from high specific strength, low density, low elastic modulus, excellent mechanical properties, high temperature resistance and corrosion resistance, titanium alloy has become a promising candidate material to solve the high casing damage rate under heavy oil thermal recovery conditions. However, the study of titanium alloy slotted screens under thermal recovery conditions is still lacking. In this paper, the physical and chemical properties, axial thermal deformation, axial thermal stress, the change law of screen and slot shape of titanium alloy screen pipe under typical working conditions of heavy oil thermal recovery in Liaohe Oilfield were systematically investigated by finite element assistance (FEA) calculation and Full-size test, the results showed that titanium alloy screen had good strength and toughness properties under thermal recovery condition, the thermal stress of titanium alloy screen under 350 °C thermal recovery temperature was only 19.3 % and 20.4 % of that of CMS screen and composite screen. After seven cycles of thermal recovery temperature, the axial elongation of titanium alloy screen at 350 °C was only 58.7 % – 60.4 % of that of steel screen, under the large bending degree of 20° / 30 m and the high temperature of 350 °C, the titanium alloy screen had excellent deformation resistance, and the maximum ovality was only 4.13 %, the parallel slit remains intact and the sand control ability was better than that of the steel screen of the same specification. Based on this study, it can be considered that the titanium alloy screen and casing can effectively reduce the axial thermal stress and elongation of the thermal recovery pipe string in the thermal recovery condition, and had high temperature resistance and fatigue resistance, titanium alloy screen had good deformation resistance under the extreme bending condition of thermal recovery, which is one of the effective methods and development directions to solve the problem of high casing damage rate in heavy oil thermal recovery field in China, this study also provided technical reference for the design, use and management of titanium alloy screen.

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刘 强,陈勋,祝国川,查永进,郭淑君,张忠世,徐欣,宋生印,尹成先.热采工况下钛合金筛管性能计算与实验研究[J].稀有金属材料与工程,2022,51(2):588~598.[LIU Qiang, CHEN Xun, ZHU Guo-chuan, ZHA Yong-jin, GUO Shu-jun, ZHANG Zhong-shi, XU-Xin, SONG Sheng-yin, YIN Cheng-xian. Calculation and Full-size Experimental Research on Performance of Titanium Alloy Screen Pipe under Thermal Recovery[J]. Rare Metal Materials and Engineering,2022,51(2):588~598.]
DOI:10.12442/j. issn.1002-185X.20210116

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  • 收稿日期:2021-02-07
  • 最后修改日期:2021-03-18
  • 录用日期:2021-04-16
  • 在线发布日期: 2022-03-09
  • 出版日期: 2022-02-28