Hydraulic type double-seal sealing matching tool

Abstract

The invention relates to a hydraulic type double-seal sealing matching tool. A snap spring baffle ring, a snap spring piston and a locking block fixing ring are sequentially arranged among an upper tool joint, a connecting sleeve and a central pipe from top to bottom, and a fixing ring I and a fixing ring II are arranged among an unsealing outer sleeve, an upper releasing cylinder I and the central pipe; and a well washing piston I and a well washing piston II are arranged among the lower part of the upper release cylinder I, the upper release cylinder II and a well washing sleeve. An upper setting piston assembly (the well washing piston I, the well washing piston II and a framework rubber ring) of the structure is also a piston assembly for well washing, the upper setting piston assembly and the piston assembly for well washing are integrated to simplify the structure, the front ends of the part fixing ring I and the part fixing ring II for unsealing are of equally-divided petal structures, an elastic piece is formed for realizing a lifting stage-by-stage unsealing function, unsealing in advance is prevented, an unsealing load is reduced, the operation safety is ensured, and smooth proceeding of later-stage unsealing operation of a multi-stage layered water injection well can be guaranteed.

Description

technical field [0001] The invention relates to an oil extraction and water shutoff technology, in particular to a hydraulic double-seal shutoff matching tool, which is suitable for requirements such as small card distance, casing protection, leak point shutoff, and bridging hoop shutoff. Background technique [0002] At present, the plugging parts of the conventional plugging and leak plugging tools are a group of rubber tubes or a group of unsealing mechanisms. The plugging area is small, and there are problems such as large unsealing load and incomplete unsealing when unsealing; Well, step-by-step unsealing and setting, large diameter and other technical requirements, when the conventional step-by-step unsealing packer is set and pressed, there is a phenomenon that the unsealing shear nails are cut in advance, resulting in failure to set. Contents of the invention [0003] In order to make up for the above-mentioned deficiencies in the prior art, the object of the prese...

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Problems solved by technology

[0002] At present, the plugging parts of the conventional plugging and leak plugging tools are a group of rubber tubes or a group of unsealing mechanisms. The plugging area is small, and there are problems such as large unsealing load and incomplete unsealing when unsealing; Well, step-by-step unsealing and setting, large diameter and other technical requirements, when the conventional step-by-step unsealing packer is set and pressurized, there is a phenomenon that the unsealing shear nails are sheared in advance, resulting in failure to set

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