钻探用井架承载能力试验与安全评定

提出了基于测试应力的钻探用井架安全承载能力评定方法。以井架现场试验时杆件的工作应力为综合评定井架结构承载性能的重要指标,以与应力有关的设计参数为有限元模型输入参数的修正对象,将现场测试与有限元数值模型相结合,通过修正的有限元模型,分析了在各种载荷作用下在役井架的工作性能,应用国际上通用的API Spec 4F标准进行了安全评定。对某型号钻探井架进行了逐级加载试验,通过井架第一级载荷作用下模型的模拟与修正,复现、预测了其它八级载荷作用下的井架工作性能,预测结果误差不超过5%,验证了模型修正方法的正确性。

Drilling Mast Load Capacity Test and Safety Evaluation

This paper proposed that the working stress is the main parameter for evaluating drilling mast safety load capacity.Using design parameters related to stress as input parameters,the working capacity of oilfield drilling mast under different load was analyzed through the combination the oilfield test with modified finite numerical model.The safety evaluation was conducted using the API Spec 4F standard.A drilling mast was loaded step by step.Through the numerical simulation and modification under first load,the well mast working performances under other 8 load were predicted.The error between the predicted and experiment results were less than 5%,which validates this method.