CAJ | 학술논문

为分析在钻井、完井过程中套管头的损坏原因，了解套管头在工作过程中的受力状态和危险部位，判断其安全性，对套管头在多工况作用下应力分布状态进行了仿真计算和安全性分析。根据API标准和行业规范制定了套管头计算校核准则，针对现场套管头实际工作过程，分析了试压、钻井等6种典型的作业工况；对套管头在6种作业工况下的受力状态进行了分析，得到了套管头的变形和应力分布状态，确定了套管头的危险部位，对不满足校核准则的工况给出了合理化的建议。仿真计算分析结果与现场套管头破坏的形态特征一致，为现场套管头安全可靠作业提供了参考。
위분석재찬정、완정과정중투관두적손배원인，료해투관두재공작과정중적수력상태화위험부위，판단기안전성，대투관두재다공황작용하응력분포상태진행료방진계산화안전성분석。근거API표준화행업규범제정료투관두계산교핵준칙，침대현장투관두실제공작과정，분석료시압、찬정등6충전형적작업공황；대투관두재6충작업공황하적수력상태진행료분석，득도료투관두적변형화응력분포상태，학정료투관두적위험부위，대불만족교핵준칙적공황급출료합이화적건의。방진계산분석결과여현장투관두파배적형태특정일치，위현장투관두안전가고작업제공료삼고。
In order to analyze the causes for damage of casing head during drilling and well completion, understand the stress state and dangerous part of casing head during its service and determine its safety, simulation calculation and safety analysis were conducted to the casing head under multiple working conditions. The casing head calculation and calibration rules were established based on API standards and industrial speciifcations. In line with the actual working process of casing head on site, six typical working conditions like pressure testing and drilling were analyzed. The stress states of casing head under six working conditions were analyzed, the casing head deformation and stress distribution state were obtained and the dangerous part of the casing head was determined. Proper suggestions were made to the working conditions which did not conform to the calibration rules. The result of simulation calculation and analysis were consistent with the shape of casing head damage and so provided reference to safe and reliable casing head operation onsite.