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CN-122012052-A - Temporary plugging device for holes for fracturing

CN122012052ACN 122012052 ACN122012052 ACN 122012052ACN-122012052-A

Abstract

The invention relates to the technical field of underground operation in petroleum industry, in particular to a temporary plugging device for a hole for fracturing, which aims to solve the problems that the existing temporary plugging device for the hole is poor in plugging effect and easy to fall off. The invention comprises an inclusion and a rigid piece, wherein the rigid piece is arranged in the inclusion, and the inclusion is also provided with a filler which has fluidity. According to the invention, the rigid part correlation Kong Kongyan in the inclusion is used for blocking, and the filler is used for blocking the residual gaps so as to adapt to irregularly-shaped perforation holes, so that the inclusion can be better filled in the perforation holes. Specifically, the inclusion is a flexible member and can deform under the action of fluid pressure, so that the filler can fully fill the part of the perforation which is not blocked by the rigid member and can enter the perforation to enhance the firmness and prevent the perforation from falling off. Therefore, the temporary plugging device for the perforation holes for fracturing can be used for stably and reliably plugging the perforation holes with irregular shapes.

Inventors

  • Xu Haoken
  • GAO CEN
  • XU RUIGUO
  • LU WEI
  • ZHAO LINGLI
  • WANG HONGKE
  • CHANG QING
  • CHEN LI

Assignees

  • 中国石油集团渤海钻探工程有限公司
  • 中国石油天然气集团有限公司

Dates

Publication Date
20260512
Application Date
20241111

Claims (10)

  1. 1. The utility model provides a temporary plugging device of hole for fracturing, its characterized in that includes inclusion (100) and rigid piece (200), rigid piece (200) set up in inclusion (100), still be provided with filler (300) in inclusion (100), filler (300) have mobility.
  2. 2. The temporary plugging device for holes for fracturing according to claim 1, wherein said enclosure (100), said rigid member (200) and said filler (300) are all made of dissolvable materials.
  3. 3. The temporary plugging device for holes for fracturing according to claim 2, wherein said filler (300) comprises at least one of soluble magnesium alloy particles, polyglycolic acid particles, plastic particles, quartz sand, silicone oil, asphalt; The inclusion (100) and the rigid member (200) are made of polyglycolic acid.
  4. 4. The temporary plugging device for holes for fracturing according to claim 1, wherein said inclusion (100) is directly formed by using high molecular polymer, cotton or hemp, or is formed by knitting at least one of polymer, cotton and hemp; the rigid member (200) is made of a high molecular polymer or metal.
  5. 5. The temporary plugging device for holes for fracturing according to claim 1, wherein said rigid member (200) is provided with at least one through slot (210) passing through itself, said filler (300) being able to pass through said through slot (210); when the number of the through grooves (210) is plural, the through grooves (210) are communicated with each other.
  6. 6. The temporary plugging device for fracturing perforations according to claim 5, wherein the inner wall of said through-slot (210) is provided with a water-swellable layer.
  7. 7. The temporary plugging device for a fracturing aperture of claim 6, wherein the water-swellable layer is made of sodium acrylate, cross-linked sodium acrylate composite resin, polyvinyl alcohol, polyurethane prepolymer, or a modification of polyurethane prepolymer.
  8. 8. The temporary plugging device for holes for fracturing according to claim 1, wherein when the number of the rigid members (200) is one, the size of the rigid members (200) is larger than the diameter of the holes (10) to plug the holes (10); When the number of the rigid pieces (200) is a plurality, the size of at least one rigid piece (200) is larger than the diameter of the perforation (10), or the size of at least one rigid piece (200) is larger than the diameter of the perforation (10) and the size of at least one rigid piece (200) is smaller than the diameter of the perforation (10).
  9. 9. The temporary plugging device for a fracturing aperture according to claim 1, further comprising a housing (400), said enclosure (100) being disposed within the housing (400), said housing (400) being ruptured at a predetermined pressure.
  10. 10. The temporary plugging device for fracturing perforations according to claim 9, wherein said casing (400) is made of plastic, polyvinyl alcohol or paper.

Description

Temporary plugging device for holes for fracturing Technical Field The invention relates to the technical field of underground operation in petroleum industry, in particular to a temporary plugging device for a hole for fracturing. Background In oilfield development, fracturing technology is an important means of improving oil and gas recovery. However, in the fracturing process, how to effectively control the propagation of the fracture and ensure that the fracturing fluid can accurately enter the predetermined area becomes a key factor for limiting the fracturing effect. Because the shape of the holes formed by adopting a shell perforation mode is irregular after perforation, the existing temporary plugging technology of the holes is poor in plugging effect, and the temporary plugging device is easy to fall off, so that the holes which are just shot and not improved by fracturing are plugged by mistake. Disclosure of Invention The invention aims to provide a temporary plugging device for a hole for fracturing, which solves the problems that the existing temporary plugging device for the hole is poor in plugging effect and easy to fall off. In order to solve the technical problems, the technical scheme provided by the invention is as follows: the utility model provides a temporary plugging device of hole for fracturing, includes inclusion and rigidity spare, the rigidity spare set up in the inclusion, still be provided with the filler in the inclusion, the filler has mobility. Optionally, the enclosure, the rigid member, and the filler are all made of dissolvable materials. Further, the filler comprises at least one of soluble magnesium alloy particles, polyglycolic acid particles, plastic particles, quartz sand, silicone oil and asphalt; The inclusion and the rigid member are made of polyglycolic acid. Optionally, the inclusion is directly formed by adopting high molecular polymer, cotton or hemp, or is formed by weaving at least one of polymer, cotton and hemp; the rigid part is made of high molecular polymer or metal. Further, the rigid piece is provided with at least one through groove penetrating through the rigid piece, and the filler can pass through the through groove; when the number of the through grooves is plural, the through grooves are mutually communicated. Further, the inner wall of the through groove is provided with a water swelling layer. Further, the water-swellable layer can be made of sodium acrylate, crosslinked sodium acrylate composite resin, polyvinyl alcohol, polyurethane prepolymer or modified polyurethane prepolymer. Further, when the number of the rigid pieces is one, the size of the rigid piece is larger than the diameter of the perforation to seal the perforation; When the number of the rigid pieces is multiple, the size of at least one rigid piece is larger than the diameter of the perforation, or the size of at least one rigid piece is larger than the diameter of the perforation and the size of at least one rigid piece is smaller than the diameter of the perforation. Further, the temporary plugging device for the hole for fracturing further comprises a shell, wherein the inclusion is arranged in the shell, and the shell is broken under preset pressure. Further, the shell is made of plastic, polyvinyl alcohol or paper. In summary, the technical effects achieved by the invention are as follows: The temporary plugging device for the fracturing holes comprises an inclusion and a rigid piece, wherein the rigid piece is arranged in the inclusion, and a filler is further arranged in the inclusion and has fluidity. According to the temporary plugging device for the perforation for fracturing, provided by the invention, the rigid part correlation Kong Kongyan in the inclusion is used for plugging, and the filler is used for plugging the residual gaps so as to adapt to the perforation with irregular shape, so that the inclusion can be used for better filling the perforation. Specifically, the inclusion is a flexible member and can deform under the action of fluid pressure, so that the filler can fully fill the part of the perforation which is not blocked by the rigid member and can enter the perforation to enhance the firmness and prevent the perforation from falling off. Therefore, the temporary plugging device for the perforation holes for fracturing can be used for stably and reliably plugging the perforation holes with irregular shapes. Drawings In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art. Fig. 1 is a schematic structural diagram of a temporary plugging device for fractur