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

An energy-storage, electro-hydraulic technology, applied in the fields of production fluids, earth-moving drilling, wellbore/well components, etc., which can solve the problems of limited stratification and progression, the impact of oil well production, and the lack of late-stage control and selective production. and other issues to achieve the effect of ensuring reliability

Active Publication Date: 2015-10-28
CHINA PETROLEUM & CHEM CORP +1
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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 conventiona

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

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Embodiment Construction

[0026] The detailed description and technical content of the present invention are described below with the accompanying drawings, but the accompanying drawings are only provided for reference and description, and are not intended to limit the present invention.

[0027] according to Figure 1-8 As shown, the electro-hydraulic dual-control energy storage type fracturing completion switch is mainly composed of the upper joint 1, the central pipe 5, the pressure transmission outer cylinder 7, the sliding sleeve outer cylinder 16, the outer sheath 28, the lower joint 29 and the inner set It is composed of energy storage device, hydraulic transmission system, control drive system and sliding sleeve system.

[0028] The energy storage device includes a nitrogen filling device 2, a nitrogen chamber, a spring 4, a compression nut 3, and an upper piston 6. The nitrogen filling device 2 is composed of a nitrogen filling joint 2-1, a ball seat 2-2, a sealing ball 2-3, a push rod 2-4 an...

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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...

Claims

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Application Information

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IPC IPC(8): E21B34/06E21B43/26
Inventor 李敢于学信任家敏张全胜高恒超田浩然姜广彬伊伟锴张建周景彩李玉宝
Owner CHINA PETROLEUM & CHEM CORP
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