Stifled device prevents frostbite von GAO ZHENDONG, MA JIANBING, ZOU ZHAOZHANG, LI YONG, BAO YUANDUN, LYU ZHIJIAN

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Mobilizable walking beam counter weight von CHEN JIE, ZHANG JIE, LI YUEZHONG, LI JUNZHONG, CONG WEI, ZHANG CHUANYU, BAO YUANDUN, ZHANG CHUANHAI, LI CHENGWU

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Wellhead penetration and changing leveling protection safety device von MU SHENGFU, CAI ZHIHONG, MU YUANMING, BAO YUANDUN, ZHAO SHENGXIAO, TIE FUKAI, HE QIYANG, WU HAI, MU WU, LI JIPENG

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Automatic grout valve with supporting rod capable of being broken under tension von MU SHENGFU, BAO YUANDUN, WANG RENFU, ZHANG RONGYAO, MA YUANBO, GUO QUANLING, ZHAO SHENGXIAO, WU HAI, GENG TINGTING, MU WU

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Oil and water swab von YE GUANGHUI, SHENG YUJIANG, YANG XIAOZE, FANG PING, BAO YUANDUN, ZHANG XINAN, KUI WANCANG, CHEN WEIXI

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Two-stage sealer von YE GUANGHUI, CHEN HUA, YANG XIAOZE, HU YUANLIN, XIE ZHANHONG, BAO YUANDUN, WANG XINYUAN, CHEN WEIXI, MU WU, GUO TIANLIN

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Solar-powered integrated remote measuring and monitoring system von LI BAOLING, LIU JINHAI, JIANG LIJUN, WANG JUNFENG, YANG SHIYONG, LI BIN, LI NANCHUN, LI CHENGWU, WANG WEIMIN, YUAN BOLI, LUO YUHAI, KAN XIUQIN, BAO YUANDUN, LIU YANJIN

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