摘要
结合BG110T和BG110TT套管的研制开发,系统研究了轧管热处理工艺对套管残余应力、壁厚公差、屈服强度以及临界抗挤压力的影响。研究结果表明,孔型设计采用壁厚正公差,采用多机架均整及严格控制回火温度与矫直温度,可使套管屈服强度提高,残余应力降低,从而有效地提高了套管的抗挤毁性能。当残余应力控制在100MPa以内,壁厚公差控制在+8%左右时,套管的临界抗挤压力可达到API标准值的1.6倍。
Based on the R & D of the BG110T and BG110TT casings, a systematic research concerning the influence by the heat treatment technologies adopted during pipe rolling on the residual stress, wall thickness tolerance, yield strength and critical anti-collapse strength of the casing is conducted. The result demonstrates that the casing yield strength can be enhanced, while the residual stress thereof can be reduced by means of the minus tolerance being used for the groove design, multi-stand reeling and properly controlling of the tempering temperature and the temperature for straightening, so as to considerably increase anti-collapse performance of the casing, and that critical ant-collapse strength of the casing will be up to 1.6 times as great as the API specified value in case the residual stress is within 100 MPa, and the wall thickness tolerance is about +8% owing to properly controlling.
出处
《钢管》
CAS
2002年第1期13-16,共4页
Steel Pipe
