Electric-hydraulic dual-control energy storage type fracturing well completion switch and switch control method

Abstract

The invention discloses an electric-hydraulic dual-control energy storage type fracturing well completion switch. The electric-hydraulic dual-control energy storage type fracturing well completion switch comprises an upper joint, a center pipe, a pressure transmission outer tube, a slide sleeve outer tube, an outer sheath and a lower joint which are sequentially connected from top to bottom, wherein an energy storage device is arranged on the center pipe; a slide sleeve system is arranged inside the slide sleeve outer tube; a hydraulic transmission system is arranged inside the slide sleeve outer tube and the outer sheath; each of the center pipe, the pressure transmission outer tube and the slide sleeve outer tube is provided with communicated pressure transmission holes; and the energy storage device, the slide sleeve system and the hydraulic transmission system are communicated through the pressure transmission holes. A control driving system is also arranged between the lower half part of the slide sleeve outer tube and the outer sheath. The electric-hydraulic dual-control energy storage type fracturing well completion switch solves the problems that during the conventional ball injection slide sleeve staged fracturing, due to the existence of a ball seat, the layering stage number is limited; the oil well yield is influenced; and the late-period control production and the selective production cannot be realized, and the like.

Description

technical field [0001] The invention relates to a staged fracturing well completion technology, in particular to an electro-hydraulic dual-control energy storage type fracturing well completion switch and a switch control method. Background technique [0002] The staged fracturing completion technology is an important means to improve the oilfield development effect. It not only realizes the stable production of the oil well, but also effectively alleviates the conflict between layers and improves the ultimate recovery factor. Especially in the process of staged fracturing well completion, it is a key step in the staged fracturing well completion process to accurately and timely seal the liquid flow channel flowing to the lower layer. [0003] In recent years, techniques such as staged fracturing of open-hole ball-pitching sleeves and in-pipe pumping bridge plugs have been widely used, and good application results have been achieved. However, with the expansion of the appli...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an electro-hydraulic dual-control energy storage type fracturing completion switch and a switch control method, which solves the problem of segmented fracturing of conventional ball-pitching sleeves, where the number of layers is limited due to the existence of ball seats, and the Oil well production is affected, and there are no issues such as controlled recovery and selective recovery in the later stage

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