Tsinghua University

Sichuan University

Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Co., Ltd.

Shengli Oilfield Branch Company of China Petroleum Chemical Co., Ltd.

Geoscience Research Institute of Shengli Oilfield Branch, Sinopec Geoscience Research Institute

Huanquan Sun

Wei Zhao

Songling Huang

Shen Wang

Xinwang Song

Jinrong Wu

Xulong Cao

Guangsu Huang

Laiju Han

Xiaohong Cui

Kun Liu

Shihua Zhang

Jing Zheng

Zuming Jiang

Zhenquan Li

Xiaoyan Chen

Yongtai Sun

Zhiqing Su

An imaging method and an imaging apparatus based on a magnetic flux leakage testing. The imaging method includes: selecting an imaging region having a corrosion defect on a pipeline to be tested; dividing the imaging region into a plurality of grid areas; scanning by a three-dimensional sensor array the pipeline to be tested so as to obtain magnetic flux leakage testing data; creating a three-dimensional orthogonal coordinate system in the imaging region, defining a first two-dimensional matrix of defect images according to the plurality of grid areas based on the three-dimensional orthogonal coordinate system, and creating a second two-dimensional matrix of magnetic flux leakage signals according to the magnetic flux leakage testing data based on the three-dimensional orthogonal coordinate system; and mapping the second two-dimensional matrix to the first two-dimensional matrix using a pre-trained wavelet neural network so as to image the corrosion defect.

Imaging method and apparatus based on magnetic flux leakage testing

The present invention relates to a new type of oil displacement agent and the process for preparing the same. The oil displacement agent is formed of a polyacrylamide-based polymer characterized by a partly crosslinked and partly branched structure, wherein said polyacrylamide-based polymer is obtained by aqueous copolymerization of acrylamide and N,N-dimethylaminoethyl methacrylate as a functional monomer, in the presence of a redox initiator system.

Oil displacement agent and process for preparing the same

Growing community of inventors

Dongying, China

Huanquan Sun