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AssigneesChina Petroleum & Chemical Corporation, Petroleum Engineering Institute of Zyof Branch, Sinopec
InventorsQingsheng ZHANG, Fei XU, Hua HUANG, Cheng ZHANG, Wenchang ZHANG, Qing LUO, Xiaolei LI, Lingling ZHU
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A downhole electromagnetic logging tool comprises a transmitting system, a magnetic field sensor array and a control module. The transmitting system and the magnetic field sensor array are both connected to the control module. The transmitting system comprises an upper emission coil and a lower emission coil, which are respectively arranged above and below the magnetic field sensor array, for generating magnetic fields of opposite polarities, allowing the magnetic fields to be concentrated at the magnetic field sensor array. A casing generates a secondary magnetic field, which is received by the magnetic field sensor array to complete detection of the casing.
A downhole electromagnetic logging tool, comprising a transmitting system for generating a magnetic field, a magnetic field sensor array for receiving a secondary magnetic field, and a control module connected with the transmitting system and the magnetic field sensor array,
Dependencies are inferred from the claim text.