A pumping type bridge plug

A bridge plug and pumping technology, which is applied in the field of large-scale multi-stage and segmented fracturing operations in unconventional horizontal wells. Sand settling effect, the effect of less injection amount

Active Publication Date: 2019-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount and high viscosity of the glue injected into the well, once the gel breaking effect of the glue is not good, it may affect the conductivity of the fracture near the wellbore

Method used

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  • A pumping type bridge plug
  • A pumping type bridge plug
  • A pumping type bridge plug

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] Such as figure 1 as shown, figure 1 It is schematically shown that the pumping type bridge plug 100 includes a central tube 1 , a guiding head 2 , a driving assembly 3 and a cleaning head 4 .

[0024] In the embodiment of the present application, the center pipe 1 is substantially cylindrical and hollow inside. Wherein, the upper end of the central tube 1 is configured with a milling butt joint surface which forms a certain angle with the shaft end surface. In this way, the milling operation of the pumping bridge plug 100 is facilitated.

[0025] In a specific embodiment, the range of the certain angle is greater than or equal to 45 degrees and less than or equal to 60 degrees. Among them, preferred angles are 45 degrees, 50 degrees, 55 degrees and 60 degrees.

[0026] The guide head 2 is connected with the central pipe 1, specifically, the guide head 2 and the ...

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Abstract

The invention relates to a pumping bridge plug. The pumping bridge plug comprises a central tube, a guide head connected with the central tube, a driving component partially arranged in the guide head, and a cleaning head connected with the driving component. Under the action of the driving component, the cleaning head is driven to rotate correspondingly to stir a sand body outside the central tube into a suspension state. The pumping bridge plug has the advantages of reducing the sand setting effect, ensuring a small glue injection amount, having high near-well fracture flow guide capability and cleaning capability, ensuring thorough sand cleaning and being wide in application and popularization range.

Description

technical field [0001] The invention relates to the technical field of multi-stage and segmented large-scale fracturing operations for unconventional horizontal wells, in particular to a pumping type bridge plug. Background technique [0002] The current bridge-plug-perforation combination is the leading technology for shale gas fracturing, especially in the exploration and development of Fuling shale gas, which has played an irreplaceable role. [0003] In the process of the existing bridge plug carrying the setting tool into the well, in addition to the injection of liquid, a certain amount of sand bodies often exist in the horizontal wellbore. In order to prevent the bridge plug from being blocked during the process of entering the well, a certain amount of glue can be injected into the well to increase the carrying effect on the sand settling of the horizontal wellbore. However, due to the large amount and high viscosity of the glue injected into the well, once the gel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/134E21B43/26
CPCE21B33/134E21B43/261
Inventor 蒋廷学李奎为王宝峰刘建坤王海涛吴春方李洪春
Owner CHINA PETROLEUM & CHEM CORP
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