海洋稠油热采电潜螺杆泵损伤与失效机理研究

项目名称： 海洋稠油热采电潜螺杆泵损伤与失效机理研究

项目编号： No.51474180

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 韩传军

作者单位： 西南石油大学

项目金额： 76万元

中文摘要： 海上油田稠油开采受环境、空间、成本等因素的影响，其开采难度远远高于陆上。针对电潜螺杆泵开采海洋稠油时井底高温环境、定转子之间的大摩擦扭矩等导致定子橡胶衬套温升过快、散热不均，脱胶断裂、溶胀卡泵，砂粒等固相引起的定子、转子磨损，腐蚀环境下的过早失效，及结构复杂、环境恶劣导致的机组综合故障率较高等亟需解决的关键问题，通过开展井底环境压力、定转子结构、轴承形式、载荷变化等因素对螺杆泵工作状态的影响研究，建立一套非牛顿介质条件下，高温、高压、冲击、重载工况的螺杆泵定转子啮合工作状态的数学模型。采用理论与实验相结合的方法探索真实工况下定转子的滚摩边界条件，完成简化条件下模型解析求解及不同工况下的数值求解方法研究。将不同温度环境和不同载荷条件下螺杆泵的实验研究与计算机仿真分析相结合，完成螺杆泵不同工作参数下内部介质的流动规律、定转子和重要部件的压力分布、承载能力、表面损伤和失效行为的深入研究。

中文关键词： 海洋石油；稠油热采；螺杆泵；损伤；失效

英文摘要： Offshore oil field of heavy oil exploitation is influenced by factors such as environment, space and cost, and the difficulty is much higher than on land. In offshore heavy oil exploration for electric submersible progressive cavity pump, downhole high temperature environment, the large friction torque between the stator and the rotor both lead to rubber bushing's temperature rising too fast, uneven heat dissipation, degumming, swelling and jamming; The sand and other solid phase cause the stator and rotor to wear, and corrosive environment results premature failure of the pump; The complex structure and environment cause the unit comprehensive higher failure rate. These are all the the key problems need to be solved. By conducting downhole environment pressure, rotor structure, bearing form, load change and other factors, the influence of progressive cavity pump working status was studied. Under a non-newtonian medium condition, high temperature and high pressure, impact, working condition of overloading, the mathematical model of the screw pump was established. By adopting the combination of theory and experiment method to explore the real working condition of the stator and rotor,the rub-impact boundary conditions was studied.The simplified model under the condition of analytic solution and numerical solution method under different working conditions were completed. Conditions of different temperatures and different load of the screw pump were applied in the experimental study and computer simulation analysis,and the flow regularity of the internal medium under different working parameters, stator and other important parts of pressure distribution, load capacity and surface damage and failure behavior were studied deeply as well.

英文关键词： offshore oil;heavy oil thermal recovery;progressive cavity pump;damage;failure