Research on the Processing Method of Extreme-Line Casing Thread Joints
As the cost of oil and gas extraction is increaseing year by year,exploiting oil and gas is getting more and more difficult,and high-temperature,high-pressure and high-corrosion well conditions are gradually increasing.This paper aims to meet the requirement of often connecting casing strings downhole with extreme-line thread joints in the working conditions of oilfields such as small wellbores and old well repair,and the external diameter of such joints is relatively smaller than that of conventional casing joints,which increases annular space and is condu-cive to downhole operations such as descending wells and cementing wells,This paper discusses the processing tech-nologies of several typical extreme-line casing thread joints(flush low-sealing extreme-line type,API-standard XC-sealing upset extreme-line type,and internal-and external-pressure dual-sealing flush extreme-line type),fo-cusing on the key processing technology of the above joints,so as to solve a series of problems during the processing of extreme-line threads.The results of this study can provide references for the production of extreme-line casing thread joints.
万方数据
维普
