High-expansibility naked eye suspension adhering system and method

Abstract

The invention discloses a high-expansibility naked eye suspension adhering system, comprising an adhering pipe (1) and a tool pipe string. The tool pipe string consists of a secondary hydraulic cylinder (2), a lower hydraulic cylinder (3), a hydraulic reducing expansion drill (4), a lower drill rod conversion joint (5), a lower hydraulic anchor (6), a lower pressure holding ball base (7), an upper hydraulic cylinder (8), an upper hydraulic anchor (9), an upper drill rod conversion joint (10), a drill pipe (11) and an upper pressure holding ball base (14). The invention further discloses a high-expansibility naked eye suspension adhering method. The high-expansibility naked eye suspension adhering system and the high-expansibility naked eye suspension adhering method provided by the invention have the advantages that when naked eye adhesion is carried out, the expansibility is high, the reliability is strong, and the construction efficiency is high. The continuous suspension adhesion operation can be completed by casing off the adhering system for one time.

Description

technical field [0001] The invention relates to the field of drilling technology, in particular to a high expansion rate open hole suspension subsidy system and method. Background technique [0002] The main way to deal with complex lost circulation, blowout, collapse and sticking in deep wells is to run more technical casings to isolate complex formations. The more complex layers, the more layers of technical casings to run. In order to ensure that the target layer is drilled, it is often necessary to adopt a design with a large opening size, which will increase the consumption of casing, drilling fluid, cement and other materials and the discharge of waste. If the complex formations are not estimated in the drilling design, multiple casings are required for isolation. If the opening size is not enough, the wellbore size will become smaller and smaller during the drilling process, and in severe cases, the target layer cannot be drilled. Research on drilling techniques that...

AI Technical Summary

Problems solved by technology

[0008] Another object of the present invention is to provide a high expansion rate naked hole subsidy method, which overcomes the shortcomings of the existing subsidy technology, such as complex construction process, low construction reliability, and large consumption of materials

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