A full-pressure temporary plugging structure and design method for controlling broken particle size

A technology of structural design and particle size, which is applied in earthwork drilling, wellbore/well components, instruments, etc., can solve the problems of uncontrolled particle size, multi-processability of debris, etc., and achieve high compressive strength and high storage strain energy Effect

Active Publication Date: 2021-08-17
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Abstract
  • Description
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Problems solved by technology

[0005] The embodiment of the present invention provides a full-pressure temporary plugging structure and design method to control the crushing particle size, so as to solve the problems of blocking risk, uncontrolled particle size, excessive debris and poor manufacturability in the prior art

Method used

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  • A full-pressure temporary plugging structure and design method for controlling broken particle size
  • A full-pressure temporary plugging structure and design method for controlling broken particle size
  • A full-pressure temporary plugging structure and design method for controlling broken particle size

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specific Embodiment

[0104] For an API standard 5-1 / 2 吋 sets of working conditions, the working condition size parameters are the outer diameter of the sleeve φ139.7mm, the inner step diameter is 130mm, the internal pass diameter is 120mm, the inner pressure resistance level 75MPa .

[0105] The temporary structure design method for controlling the crushing particle size is two parameters of the inner spherical radius SR0 and the outer spherical radius SR1 of the hemispherical shell structure. In order to achieve control crushing particle size, it is necessary to design a blind plate with full pressure temporary structure. Concrete blind slab structure design methods include the following steps:

[0106] 1) Outer ball radius SR1 determine

[0107] According to the full pass diameter φ130mm in the casing, the outer spherical radius SR1 is approximately equal to the full-pass radius φ / 2.

[0108] SR1 = φ / 2 = 65mm

[0109] 2) Inner ball radius SR0 calculation

[0110]According to the temporario flu...

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Abstract

The invention discloses a full-pressure temporary blocking structure and design method for controlling broken granularity, comprising: the blind plate temporary blocking structure is a full-pressure structure; it can withstand the fluid confining pressure of the temporary blocking; it can withstand the fluid confining pressure when increasing the fluid confining pressure , to reach the broken full-diameter state; the temporary blocking structure of the blind plate is a hemispherical shell or a spherical shell; by determining the radius of the outer sphere, the radius of the inner sphere, the stable critical pressure, and the pressure range of the broken fluid confining pressure, the compression damage can be achieved in the temporary blind plate The radial direction of the plugging structure is controlled, the full-pressure crushing particle size of the blind plate temporary plugging structure is evaluated, and the outer ball radius and inner ball radius of the blind plate temporary plugging structure are re-determined. The present invention utilizes the principles of high material compression strength, high stored strain energy, and large release of structural fracture energy to realize a stable temporary plugging pressure foundation, define the crushing pressure range, and have sufficient granularity of the crushed structure to achieve full-diameter application structure and design method, providing a new design method and full-pressure crushing structure for temporary fluid blockage in pipelines.

Description

Technical field [0001] The present invention relates to the field of petroleum, water conservancy technologies, and more particularly to a full pressure temporary structure and design method for controlling crushing particle size. Background technique [0002] The temporary block structure is now used in mechanical, material and soluble blind slabs. The temporary structure is a disposable consumption structure, such as the difficulty of the oil level well sleeve is because of the larger cryptography, so the temporary blocking technology is used to reduce the self-weight friction resistance of the horizontal casing, and the sleeve is completed. It is necessary to turn full to open, and the debris is taken away as fluid cycles. There are also temporary bridges applied by oil completion, as well as temporary plugging agents applied in water conservancy pipelines. An important technical indicator from the pipeline to all-in-one open, is the control of the crushing particle size of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/13G06F30/17G06F119/14
CPCE21B33/13G06F30/17G06F2119/14
Inventor 陶亮余松于洋刘铭
Owner NORTHWESTERN POLYTECHNICAL UNIV
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