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。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、轴向热载荷、大狗腿度下筛管及割缝形貌变化规律等进行研究。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由于热应力增加的轴向载荷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 m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地降低热采管柱在热采工况中的轴向热载荷、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。
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 investigated by finite element assistance(FEA) calculation and full-size test. The results show that titanium alloy screen has good strength and toughness properties under thermal recovery condition, and the thermal stress of titanium alloy screen under 350 ℃ thermal recovery temperature is only 19.3% and 20.4% of those of CMS screen and composite screen. After seven cycles of thermal recovery temperature, the axial elongation of titanium alloy screen at 350 ℃ is 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 ℃, the titanium alloy screen has excellent deformation resistance, the maximum ovality is only 4.13%, the parallel slit remains intact and the sand control ability is 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 under the thermal recovery condition, have high temperature resistance and fatigue resistance, and have 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 provides technical re
作者
刘强
陈勋
祝国川
查永进
郭淑君
张忠世
徐欣
宋生印
尹成先
Liu Qiang;Chen Xun;Zhu Guochuan;Zha Yongjin;Guo Shujun;Zhang Zhongshi;Xu Xin;Song Shengyin;Yin Chengxian(State Key Laboratory for Performance and Structural Safety of Petroleum Tubular Goods and Equipment Materials,CNPC Tubular Goods Research Institute,Xi’an 710077,China;Drilling&Production Technology Research Institute,PetroChina Liaohe Oilfield Company,Panjin 124010,China;CNPC Engineering Technology R&D Company Limited,Beijing 102206,China;ZS Titanium Co.,Ltd,Dandong 118305,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2022年第2期588-598,共11页
Rare Metal Materials and Engineering
基金
国家科技重大专项(2016ZX05020)。
关键词
稠油热采
石油管
钛合金
高温性能
有限元分析
全尺寸实物试验
heavy oil thermal recovery
oil country tubular goods(OCTG)
titanium alloy
high temperature performance
FEA
full-size test
