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Recyclable combined type compression rubber cylinder protecting mechanism

A protection mechanism and combined technology, applied in wellbore/well components, earthmoving, sealing/packing, etc., can solve the problem of packer stuck, low pressure bearing performance, and increased packer outer diameter problem, to achieve the effect of easy recovery, high pressure bearing performance and easy elongation

Pending Publication Date: 2020-04-10
FUXIN CITY GASOLINEEUM TOOL FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the soft metal protection mechanism is deformed, it cannot be recovered, which will increase the outer diameter of the packer. When it is used for small-diameter tools to seal large-diameter casings, it will affect the removal and recovery of the packer from the well. In severe cases, it will cause isolation The device is stuck in the well, and the pressure bearing performance is low

Method used

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  • Recyclable combined type compression rubber cylinder protecting mechanism
  • Recyclable combined type compression rubber cylinder protecting mechanism
  • Recyclable combined type compression rubber cylinder protecting mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The protective mechanism of the rubber cartridge of the compression packer includes the upper rubber cartridge cone 1, the upper protective spring 2, the lower rubber cartridge cone 4, the lower protective spring 5, the lower pressure ring 6, and the end of the rubber cartridge 3 from near to far Install in order: upper protective spring 2, upper rubber cylinder cone 1; rubber cylinder 3 ends are installed in sequence from near to far: lower rubber cylinder cone 4, lower protective spring 5, lower pressure ring 6;

[0053] The compression packer rubber cylinder of the protection mechanism includes a rubber cylinder 3, an upper rubber cylinder cone 1, an upper protection spring 2, a lower rubber cylinder cone 4, a lower protection spring 5, a lower pressure ring 6, and a rubber cylinder 3 There is a stretch spring vulcanized on the shoulder of the rubber tube 3, and the protection mechanism is installed at the end of the rubber tube 3.

[0054] The compression packer of ...

Embodiment 2

[0057] The protective mechanism of the rubber cartridge of the compression packer includes a pressure ring 9, a protective spring 10, and a rubber cartridge cone 11. The rubber cartridge 3 ends are installed in sequence from the near to the far. The rubber cartridge cone 11, the protective spring 10, and the pressure ring 9 ;

[0058] The compression packer rubber cylinder of the protection mechanism includes a rubber cylinder 3, a rubber cylinder cone 11, a protection spring 10, and a pressure ring 9. The shoulder of the rubber cylinder 3 is vulcanized with a tension spring 3-1. Or the lower end is equipped with the protection mechanism described above.

[0059] The compression packer of the rubber cartridge includes a pressure ring 9, a protection spring 10, a rubber cartridge cone 11, a rubber cartridge 3, a rubber cartridge shaft 7 is covered with a rubber cartridge 3, and a rubber cartridge cone is installed at the end of the rubber cartridge 3. body 11, the cone surface...

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PUM

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Abstract

The invention discloses a recyclable combined type compression rubber cylinder protecting mechanism, and belongs to oil and gas field downhole tools. The protecting mechanism comprises a rubber cylinder shaft, a rubber cylinder, a sleeve, an upper rubber cylinder cone or compression ring, a lower rubber cylinder cone and a lower compression ring. Extension springs are vulcanized at the upper and lower shoulder parts of the rubber cylinder. The upper rubber cylinder cone or compression ring is arranged on the upper side of an upper protection spring. During packing, the extension springs at theshoulder parts of the rubber cylinder are limited by the upper protection spring placed in an upper protection spring limiting ring groove, a limiting shoulder at the upper end of the conical surfaceof the upper rubber cylinder cone or a limiting shoulder at the upper end of the conical surface of the end, close to the rubber cylinder, of the lower rubber cylinder cone and the inner wall of thesleeve, the end, close to the rubber cylinder, of the lower rubber cylinder cone is provided with the conical surface, the limiting shoulder is arranged at the upper end of the conical surface of theend, close to the rubber cylinder, of the lower rubber cylinder cone, the end, away from the rubber cylinder, of the lower rubber cylinder cone is provided with a conical surface, a lower protection spring limiting structure is arranged on the lower rubber cylinder cone, and during packing, the lower protection spring is placed and limited between a limiting structure of the lower rubber cylindercone and the lower compression ring. The protecting mechanism can be recycled and does not get stuck in a well and can form seamless protection and provide high bearing strength when a large-diametersleeve is packed through a small-diameter tool.

Description

technical field [0001] The invention belongs to downhole tools in oil and gas fields, in particular to a protection mechanism for a compression packer rubber sleeve when a small diameter tool seals a large diameter casing, and a rubber sleeve and a packer using the same. Background technique [0002] At present, the compression packers used at home and abroad are equipped with a rubber cylinder on the rubber cylinder shaft, and the upper and lower ends of the rubber cylinder are respectively limited by a pressure ring. The barrel swells to seal the oil and casing annulus. The protective mechanism at the end of the rubber tube is generally installed or vulcanized with soft metal parts. When the sealing rubber tube is compressed, the soft metal part will deform radially and expand accordingly, preventing the hydraulic pressure from squeezing the rubber tube into the annular gap. Once the soft metal protection mechanism is deformed, it cannot be recovered, which will increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/128
CPCE21B33/128
Inventor 杨福军单希为贾红安崔志强
Owner FUXIN CITY GASOLINEEUM TOOL FACTORY