Although balance drilling is paid more attention to, Yitong exploration area in Jilin is still put overbalance drilling first for its unique and complex geological conditions.
虽然平衡钻井越来越受到勘探工作的重视，但吉林伊通探区因独特而复杂的地质条件，仍以过平衡钻井为主。
Although balance drilling is paid more attention to, Yitong exploration area in Jilin is still put overbalance drilling first for its unique and complex geological conditions.
虽然平衡钻井越来越受到勘探工作的重视，但吉林伊通探区因独特而复杂的地质条件，仍以过平衡钻井为主。
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