Reducing oil bailing operation device von CAI DUOZHUO, QIU ZEHUI, WANG YUNHE, CHEN ZENGSHUN, WANG HAN, CHEN JING

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Multifunctional integrated setting, squeezing and fishing tool and pulling-out-free squeezing and fishing method thereof von CAI DUOZHUO, HONG LIU, ZHANG XIN, WANG HAN, HOU BINGJIE, CHEN JING

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Oil bailing observation sampling device von CAI DUOZHUO, WANG YUNHE, CHEN ZENGSHUN, YAO JUAN, WANG HAN, CHEN JING

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High-inclination sidetracking well backing-pressure-preventing and pulling-out-free drilling tool combination von CAI DUOZHUO, HONG LIU, ZHAO QINRUI, HOU XIUJING, ZHANG XIN, ZHOU PEIPEI

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Downhole power drilling tool for sidetracking well von CAI DUOZHUO, WANG YUNHE, YAO JUAN, HOU XIUJING, HOU BINGJIE, ZHU LEI

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Long-service-life low-pressure-drop drilling tool assembly for sidetracking well von CAI DUOZHUO, QIU FEI, LI LINGZHI, SHEN JIE, YAO JUAN, ZHU LEI

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Anti-sticking well gauge tool von CAI DUOZHUO, WANG YUNHE, FU DENGJUN, HOU XIUJING, ZHANG XIN

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Run-out-free windowing sidetrack drilling tool and casing windowing sidetrack drilling construction method von CAI DUOZHUO, WANG YUNHE, LI LINGZHI, FU DENGJUN, DING WENBIN, LI FANLEI, HUA JIE

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Sleeve windowing integrated device von CAI DUOZHUO, WANG YUNHE, LI LINGZHI, FU DENGJUN, DING WENBIN, LI FANLEI, HUA JIE

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Pitching-free anchoring setting mechanism von CAI DUOZHUO, WANG YUNHE, LI LINGZHI, FU DENGJUN, DING WENBIN, LI FANLEI, HUA JIE

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Casing leakage plugging small workover operation method von CAI DUOZHUO, WANG YUNHE, FU DENGJUN, HU XIANGSONG, SHEN JIE, YANG WENJUN, YAO JUAN, ZHANG XIN

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