The small punch test technique （SPT） was used to evaluate the mechanical properties of various materials and the basic method to test material tensile mechanics peqeormance from an inverse finite element （ FE） ari...The small punch test technique （SPT） was used to evaluate the mechanical properties of various materials and the basic method to test material tensile mechanics peqeormance from an inverse finite element （ FE） arithmetic with SPT was put forward. The research shows that specific tensile mechanical behavior and strain-stress distribution of each district of weld seam can be accurately determined by small punch test. Therefore, mechanical behavior of the inhomogeneous joint can be predicted by a numerical model. The simulation comes to good agreement with experimental data.展开更多
有缆数字式分注工艺需在油管外预置电缆,存在现场施工作业复杂、施工效率低及带压作业难度大等问题。为此,研制了油管内对接井下电缆湿接头。该湿接头主要由对接下体和对接上体组成,施工时对接下体随井下工具下井,完井后在井口利用电缆...有缆数字式分注工艺需在油管外预置电缆,存在现场施工作业复杂、施工效率低及带压作业难度大等问题。为此,研制了油管内对接井下电缆湿接头。该湿接头主要由对接下体和对接上体组成,施工时对接下体随井下工具下井,完井后在井口利用电缆携带对接上体依靠重力与对接下体完成对接,对接下体的外接头总成设计有5个Φ20 mm的过流孔及解锁力为12~20 k N的锁紧机构,实现对接后长期稳定通信与供电、正常注水及重复对接利用。室内试验及现场应用结果表明:该湿接头设计合理、对接可靠,试验值与设计指标相符,满足注水井的作业要求。建议根据不同的井斜设计不同的加重短节,以便内、外接头可靠对接。所得结论可为优化有缆数字式分注工艺提供参考。展开更多
文摘The small punch test technique （SPT） was used to evaluate the mechanical properties of various materials and the basic method to test material tensile mechanics peqeormance from an inverse finite element （ FE） arithmetic with SPT was put forward. The research shows that specific tensile mechanical behavior and strain-stress distribution of each district of weld seam can be accurately determined by small punch test. Therefore, mechanical behavior of the inhomogeneous joint can be predicted by a numerical model. The simulation comes to good agreement with experimental data.
文摘有缆数字式分注工艺需在油管外预置电缆,存在现场施工作业复杂、施工效率低及带压作业难度大等问题。为此,研制了油管内对接井下电缆湿接头。该湿接头主要由对接下体和对接上体组成,施工时对接下体随井下工具下井,完井后在井口利用电缆携带对接上体依靠重力与对接下体完成对接,对接下体的外接头总成设计有5个Φ20 mm的过流孔及解锁力为12~20 k N的锁紧机构,实现对接后长期稳定通信与供电、正常注水及重复对接利用。室内试验及现场应用结果表明:该湿接头设计合理、对接可靠,试验值与设计指标相符,满足注水井的作业要求。建议根据不同的井斜设计不同的加重短节,以便内、外接头可靠对接。所得结论可为优化有缆数字式分注工艺提供参考。
