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针对连续油管储藏、使用和寿命分析对椭圆度检测的要求 ,根据恒磁检测原理和简化等效磁路的计算分析 ,研制了连续油管椭圆度恒磁检测装置。装置由恒磁检测传感器、光电编码器、信号采集处理卡、计算机 (包括信号分析处理软件 )以及显示打印单元等组成。室内静态和动态试验表明 ,装置分析处理软件能够适应一次检测油管 2 0 0 0m ,最大椭圆度检测平均相对误差为 1 2 7%。辽河油田现场试验时检测连续油管 12 0 0m ,表明装置整套软硬件运行正常 ,检测数据稳定 ,有较强的现场适应性和可靠性。
Aiming at the requirement of coiled tubing storage, use and life analysis for ellipticity detection, a coiled tubing elliptic constant magnetic detector was developed based on the principle of constant magnetic detection and the simplified equivalent magnetic circuit. Device consists of constant magnetic detection sensors, optical encoder, signal acquisition and processing card, computer (including signal analysis and processing software) and display printing unit and other components. Indoor static and dynamic tests show that the device analysis and processing software can adapt to a test tube 200m and the average relative error of the maximum ovality test is 122.7%. The field test of Liaohe Oilfield detected the coiled tubing at 1200 meters, indicating that the entire set of hardware and software of the device was operating normally with stable test data and strong on-site adaptability and reliability.