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Staged fracturing sliding sleeve for oil well, device and method thereof

A technology for staged fracturing of sliding sleeves and oil wells, which is applied to valve devices of wellbore/well, earth-moving drilling, wellbore/well components, etc. area, ensure efficient mining, and increase the effect of sealing contact area

Active Publication Date: 2016-01-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3) In directional wells or horizontal wells, when the sliding sleeve device is inclined or horizontal, due to the influence of gravity, the pressure holding ball and the ball seat cannot fit well to form a seal, which affects the normal operation of the sliding sleeve

Method used

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  • Staged fracturing sliding sleeve for oil well, device and method thereof
  • Staged fracturing sliding sleeve for oil well, device and method thereof
  • Staged fracturing sliding sleeve for oil well, device and method thereof

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Embodiment Construction

[0036] The structural composition and functional principles of the present invention will be further described below in conjunction with the accompanying drawings. Although the following are only described with reference to exemplary embodiments, these exemplary embodiments are not intended to limit the scope of the present invention, and there may be many alternatives, modifications and variations that will be obvious to those skilled in the art. Accordingly, the intended claimed subject matter of the present invention encompasses various modifications and alterations apparent to those skilled in the art.

[0037] Such as figure 1 As shown, the induction sliding sleeve 100 according to the present invention has a casing 2, and casing buckles capable of being connected with the oil casing can be respectively processed at both ends of the casing. A fracturing hole 5 is opened on the side wall of the casing 2 . The induction sliding sleeve 100 also includes an inner sliding sl...

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Abstract

A staged fracturing sliding sleeve used for an oil well comprises a sliding sleeve outer shell, an inner sliding sleeve, a blocking piece and a suppressing pressure control device. The sliding sleeve outer shell is used for being connected to an oil casing pipe, and a first fracturing hole is formed in the side wall of the outer shell. The inner sliding sleeve is fixed in the outer shell through a pin which penetrates through the side wall of the outer shell and the side wall of the inner sliding sleeve, and a second fracturing hole is formed in the side wall of the inner sliding sleeve, wherein the first fracturing hole and the second fracturing hole are staggered in a radial direction. The blocking piece and the suppressing pressure control device are arranged in the inner sliding sleeve. The suppressing pressure device comprises an actuating mechanism which is used for forcing the blocking piece to keep in an opened position, wherein the actuating mechanism enables the blocking piece to move to a closed position when the suppressing pressure control device receives a preset signal, seals an inner cavity of the inner sliding sleeve and forms pressure accumulation. When the pressure is increased to overcome shear force of the pin, the pin is sheared, and the inner sliding sleeve slides along the axial direction until the first fracturing hole aligns at the second fracturing hole in the axial direction of the sliding sleeve.

Description

technical field [0001] The invention relates to a segmented fracturing sliding sleeve for an oil well, a segmented fracturing device for an oil well comprising the sliding sleeve and a method for using the same. Background technique [0002] Staged fracturing technology is currently one of the main methods for reservoir stimulation and unconventional oil and gas reservoir exploitation. The technical difficulty of staged fracturing technology for horizontal wells lies in the selection of staged fracturing technology and the development of downhole plugging tools. [0003] Multistage packer staged fracturing technology is a commonly used staged fracturing technology. It is similar to the sliding sleeve circulation device. The ball-throwing sliding sleeve is a core device in this staged fracturing technology. With the use of. The opening of the conventional fracturing sliding sleeve is to release the pressure ball from the wellhead. When the pressure ball reaches the positio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B34/14E21B34/16
Inventor 曾义金李光泉戴文潮吴姬昊郭朝辉
Owner CHINA PETROLEUM & CHEM CORP
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