四吋套回接技术应用实践

随着井况的日益恶化,常规修复已无法挽回原井生命,因此悬挂四吋套井日益增多。近几年来,四吋套上部老套管也因长时间的腐蚀、挤压等因素出现严重的损坏,严重影响油气井生产,通过研究四吋套回接技术对该类井进行修复,取得了良好的应用效果。

Classification of Ultrasonic Signs Pre-processed by Fourier Transform through Artificial Neural Network Using the Echo Pulse Technique for the Identification of Defects in Welded Joints of Structural Steel

It is due to the need to ensure the security and integrity of equipment, that the non-destructive tests have been increasingly used in the industrial sector. Among these, the ultrasonic pulse echo technique is the most used in industry, mainly for its simplicity and efficiency. With one transducer only, it is possible to emit the ultrasonic and receive the echo pulse. The ANNs （artificial neural networks） are artificial intelligence techniques that, when properly trained, align themselves to inspection tests becoming a powerful tool in the detection and fault identification. In this work, the echo pulse technique was used to detect discontinuities in welds, where ANNs were fed from the information obtained by digital signal processing techniques （Fourier transform）, to identify and classify three distinct classes of defects. Results showed that with the combination of feature extraction by Fourier transformation and classification with neural networks, it is possible to obtain an automatic defect detection system in welded joints with average efficiency.

海上潜油电泵采油新技术的成功应用

随着海上潜油电泵安装费用的降低、维修次数的减少和可靠性的增强，它正逐步受到人们的重视，其应用也更加广泛。先进的海上潜油电泵技术能够使距主平台更远的探边井回接到主平台，使边际油田和偏远油田得到经济开采。海上潜油电泵采油的优点还包括节能和受不利环境制约程度的降低。