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Low-frequency hydraulic pulse fracturing tool

A hydraulic pulse and fracturing technology, applied in the field of hydraulic fracturing, can solve problems such as the lack of low-frequency hydraulic pulse fracturing tools

Active Publication Date: 2018-11-30
YANGTZE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the hydraulic pulse generating device, there is some research in related fields, such as low-frequency hydraulic pulse water injection tools: (1) energy-storage low-frequency hydraulic pulse tools, (2) downhole low-frequency pulse water injection tools in Shengli Oilfield, (3) deep Wave excitation tools, (4) downhole low-frequency pulse water injection tools, (5) hydraulic impact water injection tools, (6) Hydro-Impact tools, (7) downhole low-frequency pressure pulse water injection tools, however, low-frequency hydraulic pulse fracturing tools at home and abroad There is no related research

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Embodiment Construction

[0032]In order to make the purpose, technical solution and advantages of the present invention clearer, a low-frequency hydraulic pulse fracturing tool provided by the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation described here is only It is used to explain the present invention, not to limit the present invention.

[0033] This embodiment provides a low-frequency hydraulic pulse fracturing tool, which includes an outer cylinder 1 with an open top, and the inside of the outer cylinder 1 is sequentially provided with a driving device 2, a deceleration device 3, a pulse modulation device 4 and an energy storage device 5 .

[0034] The outer cylinder 1 includes a cylinder body 11 with both ends open, and a bottom cover 12 welded to the bottom of the cylinder body 11. A bottom frame 13 is arranged inside the bottom cover 12, and the energy storage ...

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Abstract

The invention provides a low-frequency hydraulic pulse fracturing tool. The low-frequency hydraulic pulse fracturing tool comprises an outer cylinder (1) with an open top end, wherein the outer cylinder (1) is internally provided with a driving device (2), a speed reducing device (3), a pulse modulation device (4) and an energy storage device (5) in sequence from top to bottom. The low-frequency hydraulic pulse fracturing tool can enable high-pressure fracturing fluid to generate pulse waves so as to realize low-frequency hydraulic pulse fracturing, and the purpose of low-cost high-efficiencyfracturing operation is achieved; and moreover, a gas compression device is designed in the tool to avoid the problem that a screw cannot rotate due to that the fracturing fluid does not flow when thecross section of passage is in a closed state.

Description

technical field [0001] The invention relates to the technical field of hydraulic fracturing in petroleum engineering, in particular to a low-frequency hydraulic pulse generating tool, which can generate pulse waves from high-pressure fracturing fluid to realize low-frequency hydraulic pulse fracturing. Background technique [0002] At present, with the development of the petroleum industry, low-permeability and ultra-low-permeability unconventional oil and gas resources have gradually become the main production force of oil and gas fields in various countries. In order to realize their commercial development, they generally require manual fracturing before they have commercial value. [0003] Currently, the most important way to improve reservoir permeability is hydraulic fracturing, but the current hydraulic fracturing technology generally uses static pressure fracturing to improve the seepage capacity of the reservoir, which has the advantages of large pumping volume, low e...

Claims

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Application Information

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IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 魏凯王越支熊青山张菲菲宋波凯梁轩
Owner YANGTZE UNIVERSITY
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