【摘要】 材料的腐蚀是石油井架的主要破坏形式之一。依据井架材料腐蚀率来研究井架的极限工作寿命及可靠性的变化规律具有普遍意义。根据井架材料腐蚀研究的成果，结合有限元计算、结构可靠性分析等方法，探讨了A形井架的极限工作寿命及可靠性变化规律，指出该类型井架的极限工作寿命为50年左右，而对于某一具体井架，其工作寿命则须视实际工作状况和损伤状况而定。更多还原

【Abstract】 The corrosion of the material of a derrick is one of the main forms of its failure. Therefore it is of universal significance to study the limiting service life and the variation pattern of the reliability of the derrick according to the carrosion rate of the derrick material. Based on the result of the research on the corrosion of derrick material, combined with finite element calculation and structural reliablity analysis, the limiting service life and veriation pattern of the reliability of Ashaped derricks are investigated, and it is indicated that the limiting service life of this kind of derrick is abot 50 yeare.更多还原