China Petroleum Chemical Corporation

Sinopec Southwest Oil & Gas Company

Zhou Fang

Xiaogang Wang

Zhiguo Qiao

Lin Lan

Haifeng Dong

Xingwen Wang

Yancheng Yan

A wellbore staged operation method includes running, after a first well drifting operation is performed on a wellbore, a pipe string () in the wellbore, wherein the pipe string () includes, along a direction from bottom to top, a floating hoop (), a plug seat (), a toe-end sliding sleeve (), and a fracturing sliding sleeve (); performing a cementing operation, wherein cement slurry pumped into an inner chamber of the pipe string () enters an annulus between the pipe string and the wellbore through the plug seat () and the floating hoop () to form a cement sheath, the cement sheath isolating the toe-end sliding sleeve () from the fracturing sliding sleeve (); performing a second drifting operation to ensure the toe-end sliding sleeve () of the pipe string () exposed; performing a pressure test for the pipe string; and performing staged fracturing constructions.

Wellbore staged operation method and rubber plug for said method

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Sichuan, China

Zhou Fang