Full-metal soluble bridge plug

Abstract

The invention discloses a full-metal soluble bridge plug. The full-metal soluble bridge plug comprises a seat sealing cylinder (1), an upper cone body (2) and a sealing cylinder (3), a lower cone body(4), a lower joint (5), a release rod (7), a conversion joint (8) and a seat sealing rod (9), the lower end of the seat sealing cylinder (1) is attached to the upper end surface of the upper cone body (2), the upper end of the seat sealing cylinder (1) is connected with an externally-arranged seat sealing tool, in the seat sealing barrel (1), the upper end of the conversion joint (8) is connectedwith the lower end of the seat sealing rod (9), the lower end of the conversion joint (8) is connected with the upper end of the releasing rod (7), the lower joint (5) is connected with the releasing rod (7) through threads, the lower joint (5) is connected with the lower cone body (4) through threads, one end of the lower cone body (4) is matched with one end of the sealing cylinder (3) throughthorn teeth, and the other end of the sealing cylinder (3) is matched with the upper cone body (2) through the thorn teeth. The full-metal soluble bridge plug has the characteristics of reliable anchoring, reliable pressure bearing, complete dissolution and the like.

Description

technical field [0001] The invention relates to the technical field of downhole key tools for unconventional gas reservoir development, in particular to an all-metal soluble bridge plug. Background technique [0002] In the technical field of petroleum engineering well completion and fracturing operations, it is often necessary to perform staged fracturing operations on different intervals of vertical wells, directional wells, or horizontal well bores. During the staged fracturing process, it is necessary to use bridge plugs to achieve Quarantine. Soluble bridge plug + clustered perforation, as the current main technology for unconventional gas reservoir development, refers to the use of cables or coiled tubing on the premise of effective communication between the wellbore and the formation. The bridge plug is transported to the target layer, and a perforation technique that combines setting and multi-cluster perforation is completed, and staged fracturing is performed thro...

AI Technical Summary

Problems solved by technology

The soluble materials of existing soluble bridge plugs include soluble metal and soluble rubber. Due to the different dissolution time and dissolution rate of the two materials in the same environment, it is difficult to accurately determine the overall dissolution time of soluble bridge plugs, which affects the rapid commissioning of gas wells At the same time, the main body of anchoring slips is composed of soluble metals and insoluble particles. After dissolution, undissolved residues such as slips and slips remain in the wellbore. Later, coiled tubing strings and fishing tool strings need to be lowered to carry out Well drilling and salvage construction operations have long operating cycles and low fishing efficiency, which affects the progress of on-site construction. Therefore, there are also some soluble bridge plugs now, but the structure is more complicated, too many connectors, and the connection method is unreasonable, resulting in processing difficulties. , the cost is too high

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