投球滑套压裂球承压性能分析及试验研究  

Pressure Bearing Performance Analysis and Experimental Study of Frac Ball Used for Actuating Fracture Sleeve

作　　者：左争云 裴晓含[1] 魏松波[1] 王新忠[1] 

机构地区：[1]中国石油勘探开发研究院

出　　处：《石油机械》2014年第7期82-85,共4页China Petroleum Machinery

基　　金：中国石油天然气股份有限公司科研项目"油气藏储层改造技术重大现场攻关实验"(2013FCGYLGZ001)

摘　　要：对压裂球进行受力分析和地面承压测试是开发高性能压裂球的关键。采用有限元数值模拟方法对压裂球进行了受力分析,研究了不同压力对压裂球内应力和塑性变形区域的影响规律,并通过承压试验测试了压裂球的承压性能。为了模拟真实的密封过程,选择显式动力方法定义分析步,在整个过程中认为球座无变形。分析结果表明,压裂球在不同压力载荷下的应力集中区域为球与球座接触区,随着压力的增大,应力集中区和塑性变形区逐渐向球心延伸;当压力超过110 MPa时,压裂球最大应力值已经接近材料的应力极限。The stress analysis and pressure-bearing test on ground is the key to the development of high-performance frae ball. The stress analysis of frae ball is conducted by numerical simulation using finite element method. The effects of different pressures on the frac ball＇ s inner stress and plastic deformation zone are studied, and the pressure bearing performance of the frae ball is tested by the pressure-bearing test. To simulate the real sealing process, the explicit dynamic method is chose to define analysis step and the ball seat is considered non-deformable in the whole sealing process. The results showed that, with different pressure, the frac ball＇ s stress concentration zones are located at the contact area of frac ball and ball seat. The frae ball＇ s stress concentration zone and plastic deformation zone gradually extend to the frac ball center with the increment of pressure. The maximum stress of frac ball is close to the stress limits of the material when the pressure exceeds 110 MPa.

关 键 词：投球滑套 压裂球 承压性能 曲面接触 塑性变形 有限元分析 ABAQUS 

分 类 号：TE934[石油与天然气工程—石油机械设备]