Staged fracturing slide sleeve opening-closing device

A technology for staged fracturing sliding sleeves and switching devices, which is applied to wellbore/well valve devices, production fluids, wellbore/well components, etc. Stable and reliable work, simple device structure and convenient operation

Inactive Publication Date: 2019-03-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with the popularization and application of this technology, the disadvantage of difficult subsequent reservoir stimulation has also been exposed. Due to the lack of a special device for switching sliding sleeves for segmental fracturing, when oil and gas wells pro

Method used

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  • Staged fracturing slide sleeve opening-closing device
  • Staged fracturing slide sleeve opening-closing device

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Embodiment Construction

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0018] Below in conjunction with accompanying drawing and example the present invention will be further described:

[0019] Such as Figure 1-2 As shown, a segmented fracturing sliding sleeve switching device designed by the present invention includes an upper joint 1, an upper connecting sleeve 2, a central tube 3, an upper fixing sleeve 4, a spring 5, an upper inner sliding sleeve 6, and an upper sliding support 7. Connecting rod 8, sliding sleeve switch cl...

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Abstract

The invention relates to a staged fracturing device in the field of petroleum machinery, in particular to a staged fracturing slide sleeve opening-closing device, comprising an upper connector, an upper connection sleeve, a center tube, an upper fixing sleeve, a spring, an upper inner slide sleeve, an upper slide support, a connection rod, a slide sleeve opening-closing claw, a pin, a lower slidesupport, a lower fixing sleeve, a lower inner slide sleeve, a lower connection sleeve and a lower connector. The upper end of the upper connector is connected with a tubing; the lower end of the upperconnector is in threaded connection with the upper end of the upper connection sleeve; the lower end of the upper connection sleeve is in threaded connection with the upper end of the upper fixing sleeve; the right end of the upper fixing sleeve is provided with the upper slide support. In principle, elastic potential energy of the spring is stored and released under the action of a high-pressurefluid so that the slide sleeve opening-closing claw is extended and contracted, thereby opening or closing a fracturing slide sleeve. The staged fracturing slide sleeve opening-closing device has theadvantages that the staged fracturing slide sleeve opening-closing device is simple in structure and convenient to operate, can run stably and reliably, can meet the field requirements of various conditions for open-hole staged fracturing of a multi-stage slide sleeve of a horizontal well, and can provide full fracturing development for reservoirs.

Description

technical field [0001] The invention relates to a segmented fracturing device in the field of petroleum machinery, in particular to a segmented fracturing sliding sleeve switch device. Background technique [0002] The multi-stage sliding sleeve open hole staged fracturing technology for horizontal wells is often completed by presetting pipe string construction, one-time running, and continuous ball-dropping operations. It is widely used in directional wells and horizontal wells in shale gas and low-permeability production layers. Fracturing. However, with the popularization and application of this technology, the disadvantage of difficult subsequent reservoir stimulation has also been exposed. Due to the lack of a special device for switching sliding sleeves for segmental fracturing, when oil and gas wells produce water, formation water can easily enter the wellbore through the sliding sleeves. , interfere with the fracturing operation; in addition, for the section with in...

Claims

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Application Information

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IPC IPC(8): E21B43/26E21B34/14
CPCE21B34/14E21B43/26
Inventor 王旱祥车家琪娄晖张砚雯贾晨曦刘家春王姣姣
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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