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Hole positioning and cleaning assembly and unconventional reservoir hole positioning and spraying tool and method

A technology of positioning cleaning and positioning parts, which is applied in the direction of wellbore/well components, earthwork drilling, flushing wellbore, etc., and can solve the problems of unable to clean perforated holes

Active Publication Date: 2021-03-16
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of the prior art that only part of the blockage can be cleaned out and the perforation holes cannot be thoroughly cleaned, and to provide an unconventional reservoir perforation positioning injection tool, the unconventional reservoir perforation positioning injection tool The tool can completely remove the blockage in the perforation hole, and realize the secondary reconstruction of the hole, effectively reducing the seepage resistance near the wellbore zone, thereby restoring the productivity of the old well

Method used

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  • Hole positioning and cleaning assembly and unconventional reservoir hole positioning and spraying tool and method
  • Hole positioning and cleaning assembly and unconventional reservoir hole positioning and spraying tool and method
  • Hole positioning and cleaning assembly and unconventional reservoir hole positioning and spraying tool and method

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Embodiment Construction

[0038] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In the present invention, it should be understood that the orientation or positional relationship indicated by the terms "deviating from", "upper" and "lower" corresponds to the actual orientation or positional relationship; The inside and outside of the outline of the part itself; it is only for the convenience of describing the present invention and simplifying the description, and does not indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. limit.

[0039] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0040] One aspect of the present invention provides a hole positioning cleaning assembly, such as Figur...

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Abstract

The invention relates to the technical field of oil and gas field development, and discloses a hole positioning and cleaning assembly and an unconventional reservoir hole positioning and spraying tooland method. The hole positioning and cleaning assembly comprises a rack and a positioning piece, wherein the rack is used for being arranged in an axial groove in the outer surface of a tubular column in an axial moving mode, a first jet hole and a second jet hole are formed in the length direction of the rack at an interval, the positioning piece is used for being rotationally arranged on the outer surface of the tubular column and comprises a tooth part meshed with the rack and an extension arm rotating along with the tooth part, and when the positioning piece rotates, the rack can be driven to move, so that the first jet hole or the second jet hole communicates with a through hole in the bottom wall of the axial groove. The unconventional reservoir hole positioning and jetting tool using the hole positioning and cleaning assembly is accurate in perforation positioning and capable of thoroughly removing blockages in perforations, secondary transformation of the perforations can be achieved, the near-wellbore-zone seepage resistance of wellbores is effectively reduced, and therefore the productivity of the wellbores is recovered, the structure is simple, and the working efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a hole positioning cleaning component, an unconventional reservoir hole positioning injection tool and a method. Background technique [0002] Perforation is an operation that uses special energy-gathering equipment such as perforating bullets to enter the predetermined layer of the wellbore to open holes to allow the fluid in the downhole formation to enter the wellbore. Perforation is generally used in oil and gas fields and coal fields, and sometimes it is also used in the exploitation of water sources . In the process of perforating construction, the perforating bullets squeeze the formation around the ballistic trajectory, as well as factors such as formation sand production and heavy oil accumulation in the subsequent production process of shale oil reservoirs will cause the permeability and conductivity of the perforation hole to increase....

Claims

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Application Information

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IPC IPC(8): E21B21/00E21B43/119
CPCE21B21/00E21B43/119
Inventor 常智侯冰武安安金衍陈勉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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