Well cementation device

• Main Authors: TAO DAN, DENG HONGTAO, YIN LING, LI HONGYUAN, TONG DESHUI, ZHAO JINGCHUN, ZHAI SHUANJI, WU DONGKUI, YANG YANG, GUO HONGFENG, WU GUOJUN, LIU MINGTAO, TAN JING
• Format: Patent
• Language: Chinese; English
• Published: 02.04.2014
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model discloses a well cementation device. The well cementation device comprises a casing pipe column, an inner pipe column and accessories. The casing pipe column comprises a casing pipe and a rotary gap bridge, the rotary gap bridge is detachably and fixedly connected with the casing pipe, the inner pipe column comprises an inner pipe and a dual-level buckle nipple, the inner pipe is arranged inside the casing pipe, the inner pipe is detachably and fixedly connected with the dual-level buckle nipple, a square drill stem is connected to the upper portion of the dual-level buckle nipple through a connector, the dual-level buckle nipple and the rotary gap bridge are detachably and fixedly connected and sealed, and the accessories comprise an elastic centralizer and a guiding shoe. The well cementation device is integrated in a detachable and fixedly connected mode, ensures that the square drill stem rotates to drive the casing pipe column to rotate, and is high in displacement efficiency, good in w