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An intelligent sliding sleeve of multi-stage fracturing electric control switch without bridge plug

A technology of intelligent sliding sleeve and electronically controlled switch, which is applied in the fields of production fluids, wellbore/well components, earth-moving drilling, etc., can solve problems such as complex construction operations, and achieve the effect of improving fracturing operation efficiency and high degree of automation

Active Publication Date: 2020-07-14
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the device is used to drill bridge plugs, the opening and closing of the sliding sleeve requires tools to be lowered from the wellhead, and the construction operation is relatively complicated.

Method used

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  • An intelligent sliding sleeve of multi-stage fracturing electric control switch without bridge plug
  • An intelligent sliding sleeve of multi-stage fracturing electric control switch without bridge plug
  • An intelligent sliding sleeve of multi-stage fracturing electric control switch without bridge plug

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0023] like figure 1 As shown, a non-bridge plug multi-stage fracturing electronically controlled switch intelligent sliding sleeve includes an upper joint 1, an inner cylinder 3, an outer cylinder 4, a piston 15, a fracturing sleeve 16, a lower joint 17 and a control system 18; The lower end of the upper joint 1 is threadedly connected to the upper end of the inner cylinder 3, the outer cylinder 4 is fixed to the outside of the inner cylinder 3 through threads, the upper end of the fracturing sleeve 16 is threadedly connected to the lower end of the inner cylinder 3, and the lower end of the fracturing sleeve 16 is It is threadedly connected with the upper end of the lower joint 17, the middle part of the inner cylinder 3 is provided with a first step 23, the two ends of the...

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Abstract

The invention relates to a bridge-plug-free multi-stage fracturing electric control switch intelligent sliding sleeve. The bridge-plug-free multi-stage fracturing electric control switch intelligent sliding sleeve is mainly composed of an upper connector (1), a control system (18), an inner barrel (3), an outer barrel (4), a piston (15), a fracturing sleeve (16) and a lower connector (17), whereinthe control system (18) drives a motor (7) to work after detecting a pressure signal through a pressure sensor (2), the pressure signal is transmitted to a ball screw (10) after being subjected to two-stage deceleration, the ball screw (10) does telescopic motion, opening and closing of a pressurizing hole are controlled through the piston (15), and fracturing construction operation is completed.According to the structure, a bridge plug does not need to be put downwards, and the situation that the bridge plug is drilled and abraded, and bridge plug chippings hinder the fracturing process isavoided; after fracturing operation is completed, a fracturing channel is in a closed state through an electric control system, and the situation that a conventional sliding sleeve is in an open stateall the time after fracturing is avoided; and intelligent operation of the sliding sleeve is achieved through force transmission of the pressure sensor (2), the fracturing operation efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of layered transformation of oil and gas field reservoirs, in particular to a non-bridge plug multi-stage fracturing electronically controlled switch intelligent sliding sleeve. Background technique [0002] In recent years, with the continuous improvement of drilling technology, oil production has gradually developed from conventional oil and gas reservoirs with medium and high permeability to unconventional oil and gas reservoirs with low porosity, low permeability and low pressure. Facing the development of low-permeability oil and gas reservoirs, staged fracturing technology is an effective means to improve the production of low-permeability reservoirs. Sliding sleeves are the main technical means for wellbore segmentation. Most of the existing sliding sleeves can only realize the opening of the sliding sleeves, and it is difficult to realize the closing process. Therefore, the construction process is mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B34/14E21B43/26
CPCE21B34/14E21B43/26
Inventor 马辉运张华礼喻成刚帅春岗付玉坤尹强杨云山董亮亮王学强缪云洪玉奎
Owner PETROCHINA CO LTD
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