摘要
传统的射流式液动冲击器活塞缸体大多采用单、双道侧壁密封方式,易出现活塞缸体局部变形、密封失效和钻具刺漏等问题。鉴于此,应用有限元分析模块SolidWorks Simulation对活塞缸体受力情况进行静力学模拟分析。分析结果表明,活塞缸体局部发生了径向变形,且其上端的轴向和径向变形十分明显。因此,在结构上对活塞缸体侧壁密封方式进行优化设计,即采用新型侧壁密封方式代替传统的单、双道密封圈侧壁密封方式。经有限元分析验证,优化设计后的结构可抑制活塞缸体的径向变形,从而防止侧壁密封失效现象。在相同的试验情况下,改进后的射流式液动冲击器比传统的射流冲击器机械钻速提高约52%,单只钻头进尺提高72%,纯钻时间延长14%,钻头磨损较小。因此优化设计后的液动锤工作寿命更长,工作更稳定,钻井效率更高。
The traditional hydraulic jet hammer piston cylinder mostly use single-and dual-channel sidewall seal, which is prone to issues like piston cylinder local deformation, seal failure and drilling tool washout. To address these issues, the finite element analysis module of Solidworks Simulation is applied for statics simulation and analysis of forces on piston cylinder. The results showed that the piston cylinder occurs local radial deformation, and its upper end has an obvious axial and radial deformation. Therefore, the seal structure of the side wall of the piston cylinder is optimized by replacing the single-and dual-channel seal ring sidewall seal method with new side well seal method. The finite element analysis demonstrates that optimized structure can inhibit the radial deformation of the piston cylinder, thereby preventing the sidewall seal failure. Under the same test conditions, and compared with the traditional hydraulic jet hammer, the improved hydraulic jet hammer has a ROP increment of 52% , foot- age drilled per bit increment of 72% and net drilling time extension of 14% with smaller drill bit wear. Thus, the optimized hydraulic jet hammer has an extended working life and more stable working status, resulting in higher drilling efficiency.
出处
《石油机械》
北大核心
2014年第7期24-27,31,共5页
China Petroleum Machinery
