Packer for intelligent well completion

Abstract

The invention discloses a packer for intelligent well completion. The packer comprises a main pipe body, wherein a rubber tube sealing mechanism for expansion seat sealing and a slip anchoring mechanism for anchoring are sleeved on the main pipe body; and a main channel axially penetrating through and a plurality of parallel pipe cable bypass channels are arranged inside the main pipe body. The lower end of an inner cylinder of the rubber tube is connected with an elastic unsealing claw which is sleeved on the main pipe body and slides relative to the elastic unsealing claw; the rubber tube inner cylinder, the elastic unsealing claw and the main tube body form a built-in thrust structure; a contacted part between the main pipe body and the elastic unsealing claw takes the shape of a conical of which the diameters are reduced from top to bottom; when the packer is positioned in a seat sealing state, the elastic unsealing claw expands in the radial direction; and when the packer is positioned in an unsealing state, the elastic unsealing claw is folded in the radial direction. According to the packer disclosed by the invention, the requirement that a plurality of pipe cables pass in the intelligent well completion process can be met; and the packer has the advantages of favorable sealing effect, firmness in seat sealing, smoothness in unsealing, simple structure, convenience for use and capability of being reused.

Description

technical field [0001] The invention relates to an oil-gas well packer in the petroleum industry, in particular to a high-pressure packer suitable for an intelligent well system. Background technique [0002] At present, intelligent well completion technology is the world's most advanced well completion technology integrating downhole dynamic monitoring and production optimization automatic control, and has broad application prospects. Intelligent well completion technology is a well completion system that controls, analyzes and manages oil wells from the ground in multi-layer and multi-branch oil wells. It is an effective and high-end technical means to improve oil recovery, reduce water and increase oil, and intelligently monitor oil wells. . [0003] The packer for intelligent well completion is the core component and key equipment of the intelligent well completion system, but the existing packers for intelligent well completion have the following deficiencies in struct...

AI Technical Summary

Problems solved by technology

[0004] 1. In order to meet the requirements of intelligent well completion layered mining and mixed mining, it is necessary to pass downhole measurement cables (optical cables and cables), hydraulic control pipelines, control cables and other pipelines, and all kinds of pipelines must pass through the packer. When going underground, the existing packer or umbilical cannot pass through, or the umbilical is not well sealed after passing through, which is easy to damage the umbilical

[0005] 2. The anchoring of the existing packer is not complete enough during setting, which leads to the insufficient firmness of the setting seal and affects the use effect of the packer

[0006] 3. The existing packer requires a large lifting and unsealing force to unseat the packer during unsealing, which brings certain troubles to the unsealing process

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