Electro-hydraulic double control energy storage type fracturing completion switch and switch control method

Abstract

The invention discloses an electro-hydraulic dual-control energy storage type fracturing completion switch, which comprises an upper joint, a central pipe, a pressure transmission outer cylinder, a sliding sleeve outer cylinder, an outer sheath, and a lower joint connected sequentially from top to bottom. An energy storage device is arranged on the central tube, a sliding sleeve system is installed inside the outer sleeve of the sliding sleeve, a hydraulic transmission system is installed inside the outer sleeve of the sliding sleeve and the outer sheath, and the central tube, the outer pressure transmission cylinder, and the outer sleeve of the sliding sleeve are Connected pressure transmission holes are provided, and the energy storage device, the sliding sleeve system and the hydraulic transmission system are connected through the pressure transmission holes. A control drive system is also arranged between the lower half of the outer cylinder of the sliding sleeve and the outer sheath. The invention solves the problems of segmental fracturing of the conventional ball-pitching sliding sleeve, which has limited stratified stages due to the existence of the ball seat, which affects the production of oil wells, and does not have the problems of later-stage controlled exploitation and selective exploitation.

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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