METHOD FOR STAGED OPERATION OF WELLBORE AND RUBBER PLUG FOR SAID METHOD Russian patent published in 2025 - IPC E21B43/26 E21B33/13 

Abstract RU 2833269 C1

FIELD: oil, gas and coke-chemical industry.

SUBSTANCE: invention relates to development of oil and gas deposits. In particular, disclosed is a method for completing a well, which includes the following steps: wherein the pipe string comprises, along the direction from bottom to top, a floating ring, a plug seat, a sliding sleeve of the bottom-hole end and a sliding sleeve for hydraulic fracturing; performing a cementing operation, in which the cement slurry pumped into the inner cavity of the pipe string enters the annular space between the pipe string and the wellbore through the plug seat and the floating ring to form a cement sheath, wherein the cement sheath isolates the sliding sleeve of the bottomhole from the sliding sleeve for hydraulic fracturing; performing a second penetration operation to open the sliding sleeve of the downhole end of the pipe string; performing pressure testing for the pipe string and performing staged hydraulic fracturing of the formation.

EFFECT: simplification of well completion technology.

20 cl, 8 dwg

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RU 2 833 269 C1

Authors

Lei Wei

Hou Zhimin

Dong Haifeng

Yan Yancheng

Lan Lin

Wang Xingwen

Wang Xiaogang

Qiao Zhiguo

Fang Zhou

Dates

2025-01-16Published

2021-06-10Filed