Double-seal plug-free internal cementing pipe column

• Main Authors: WANG WEIYANG, HUANG ZHAOPENG, WANG ZHIZUN, LYU QINGHUA, YU TIANMIN, WANG YANG, ZHU XINJUN, LIU HAIYANG, WU JIANPING
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2023
• 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 relates to a double-seal plug-free internal cementing pipe column. According to the technical scheme, an upper connector is arranged at the upper end of a pipe column body, an upper packer is installed on the lower side of the upper connector, an inner cement injection channel is formed in the middle of the pipe column body, a positioning indication assembly is arranged on the lower side of the inner cement injection channel, a composite sealing ring is arranged on the outer side of the positioning indication assembly, and a lower packer is installed on the lower side of the pipe column body. And a pressure relief check valve is arranged at the lower end of the tubular column main body. The method has the beneficial effects that the construction process is simple, safe and reliable, compared with a traditional plug drilling or fishing process, the process implementation cost can be saved by more than 50%, the labor intensity of well drilling workers is greatly reduced, no plug and no residual cu