Half-way well cementation float shoe device, pipe column and half-way well cementation operation method

• Main Authors: CHEN YUHAO, ZHENG DUJIAN, ZHOU BO, LIANG XIAOYANG, LI WEI, QI ZHENGYU, QIN DEWEI, ZOU CHUANYUAN, CHANG LIANYU
• Format: Patent
• Language: Chinese; English
• Published: 20.06.2023
• 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 invention provides a half-way well cementation float shoe device which comprises a float shoe body provided with an overflowing channel, and a circulation hole and a liquid injection hole are formed in the side wall of the float shoe body. The liquid injection sliding sleeve is arranged in the float shoe body and provided with a pressure transmitting hole, and a ball seat is formed at the lower end of the liquid injection sliding sleeve; the closing plug seat is arranged at the upstream end of the liquid injection sliding sleeve; the packer unit is arranged on the outer surface of the float shoe body and corresponds to the liquid injection hole; in the first state, the liquid injection sliding sleeve closes the circulation hole and the liquid injection hole; in the second state, the liquid injection sliding sleeve moves downwards relative to the float shoe body, so that the pressure transmission hole is communicated with the liquid injection hole; in the third state, the packer unit is expanded and sealed