【作者】 董振荣；

【导师】 邹龙庆；

【作者基本信息】 大庆石油学院 ， 安全技术及工程， 2003， 硕士

【摘要】 JJ160／41-K型井架是大庆石油管理局钻技公司机修厂研制开发的一种适合大庆地区的K型井架，近几年陆续在大庆油田投入使用。由于设计时仅进行了静强度和稳定性计算，而没有进行动力计算，在使用过程中出现了有时振动过大、个别部位刚度弱的问题。特别是近1—2年来，随着大庆以外油田钻探的需要，其强度、动力稳定性及承载能力等成为现场普遍关注的问题，必须从理论上予以解决。 本文以JJ160／41-K型井架为实例对井架进行了结构动力特性分析及现场应力测试，提出了一套井架评定方法，可以较为真实地反映各种载荷作用下的井架任意部位的力学性能，较为科学地对JJ160／41-K型井架进行安全评定。 井架动力特性分析主要采用I-DEAS软件，以空间梁单元作为有限元计算的基本单元，通过井架空间结构数值化，建立井架计算机数值模型，分析得到位移、应力、模态、稳定性等计算结果；建立了井架大腿截面几何尺寸的优化模型，分析了作用载荷对井架结构频率的影响；研究了锈蚀和初始弯曲对井架承载能力的影响；以DASP软件为分析平台，对在用井架进行现场动态应力测试；通过计算机仿真后，评定所测试井架的承载能力。更多还原

【Abstract】 The JJ160/41-K type derrick is one of K type derrick adapted to the district of Daqing. It is developed by Oil well drilling Technology and Service Company of Daqing Petroleum Administration Bureau. Mechanical Factory, And it has been used widely in Daqing Oil Field in recent years. Because only static intensity and stability analysis is considered and dynamic calculation is usually neglected in design, the problems like heavy vibration and local weak rigidity have appeared. Especially in these two years, with the increasing need of drilling and exploration besides Daqing Oil Field, much attention is paid on the problems of intensity, dynamic stability and carrying capacity, which need to be theoretically solved.This thesis takes derrick JJ160/41-K as example and puts forward an evaluation method by structure dynamics characteristic analysis and locale test. It can better reflect the mechanical performance of any part of derrick under varying load and carry out the safety evaluation for derrick scientifically.The analysis of dynamic characteristic for derrick has been mainly done with I-DEAS software, by adopting three dimensional beam element as the basis element for FEM analysis and analyzing numerical derrick structure, the author establishes the computer numerical model to calculate mechanical parameters such as displacement, stress, mode and stability. In addition, the author establishes an optimization model of beam section’s geometrical dimension to analyze the influence of different loads on structure frequency and the influence of rust and initial winding on carrying capacity. Besides, the locale tests are carried out, and the carrying capacity for the derrick are evaluated based on the DASP software analysis platform and computer emulation.更多还原