Intelligent safety rope suspension device von YANG SHUYING, JIA ZHEN, JIAN SHUXU, TA YAOJING, XU JING, SUN KE, WU QINGDONG, WANG TIEQIANG, GAO FENG, HE CHUAN, ZHANG GUOLONG, DU XIAOXUE

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Oiling device and oil pumping unit von JIA ZHEN, YANG SHUYING, DUAN GUOQIANG, JIAN SHUXU, TA YAOJING, XU JING, LI YONG, SUN KE, WU QINGDONG, WANG TIEQIANG, GAO FENG, DU XIAOXUE

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Cord rack body and composite bearing von JIANG JIAYUE, WANG XIN, TA YAOJING, SUN KE, WU QINGDONG, LI FENGHUA, DU XIAOXUE, YANG SHUYING, JIAN SHUXU, ZHANG XUEQIN, LENG BIAO, LIU YAZHOU, ZHAO SHUJIE

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Depression bar ball injector von TA YAOJING, LIU BAOXUN, AN YAN, DU PENGFEI, ZENG TAO, ZHANG XIAOWEN, HUA JINWEI, AN ZEDIAN, DING CHAO, SUN SHOUGUO

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Polished rod eye and beam -pumping unit von TA YAOJING, LIU HAITAO, SUN KE, WU QINGDONG, LYU XIAOLAN, DU XIAOXUE, YANG SHUYING, WANG SHULAN, JIAN SHUXU, FU YUECHUN, LENG BIAO, LIU YAZHOU, HE CHUAN, ZHAO SHUJIE, MENG LIHUA, LI XIAOJING

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Steam driving and injecting packer von TA YAOJING, YU LIHONG, LIU ZUHE, YANG DONGPING, ZHANG HONGBAO, HE CHUANXING, GU HUI, HUANG XIANHUI, WANG XUELIAN, WEI RAN, WANG WEI, HU LIANGWEI, QI YONG, CHEN JIE, JIA ZHANWEI, DU XIAOFENG, CHEN PENG, ZHAO SHUJIE, ZHANG JICHAO, XU JIASAI

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Extension type slidingly sealing device von WANG WEI, WEI KAI, MA CHUNBAO, QI YONG, TA YAOJING, LIAO HONGBO, LIU ZUHE, HE CHUANXING, YANG DONGMEI, DU XIAOXUE

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