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A kind of composite packer rubber cartridge and preparation method thereof

A packer and composite technology, applied in the directions of sealing/packing, earthwork drilling, wellbore/well components, etc., can solve the problems of high pressure, not suitable for drag fracturing conditions, etc., to improve the service life , Simple structure, wide application effect

Active Publication Date: 2017-07-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite packer rubber cartridge and its preparation method, which overcomes the problem that the packer rubber cartridge in the prior art cannot be repeatedly set, unsealed, and withstand high pressure, or cannot be used for dragging fracturing work. situation problem

Method used

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  • A kind of composite packer rubber cartridge and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment provides a method for preparing a composite packer rubber cartridge, comprising the following steps:

[0024] 1) Put the mixed rubber material of the supporting rubber cylinder 2 into the extrusion cavity of the supporting rubber cylinder mold, control the temperature between 95°C and 120°C during the injection process, and perform injection molding. Raise to 135°C-160°C, after vulcanization for 2 hours, lower the temperature to 10°C-25°C, and take out the support rubber cylinder 2 from the support rubber cylinder mold;

[0025] 2) Grind the joint surface of the supporting rubber cylinder 2 and the sealing rubber cylinder 1, apply adhesive, and dry it for later use;

[0026] 3) Put the support rubber cylinder 2 that has been injected and coated with adhesive into the composite packer rubber cylinder mold, with the adhesive surface of the support rubber cylinder 2 facing up, and then mix the rubber material of the sealant rubber cylinder 1 Put it in the ...

Embodiment 2

[0030] In this embodiment, a composite packer rubber cartridge with a 5.5-in casing is taken as an example to further illustrate the present invention. The outer diameter of the sealing rubber cylinder 1 and the supporting rubber cylinder 2 are both 114mm and the inner diameter is 65mm. The sealing rubber cylinder 1 and the supporting rubber cylinder 2 are combined through the vulcanization process. The length is 6cm, the sealing rubber cylinder 1 is made of hydrogenated nitrile rubber with a Shore hardness of 78, and the supporting rubber cylinder is made of a hydrogenated nitrile rubber with a Shore hardness of 95.

[0031] The manufacturing process of this composite packer rubber cartridge is as follows:

[0032] The first step: Put the mixed rubber material of the supporting rubber cylinder 2 into the extrusion cavity of the supporting rubber cylinder mold. During the injection process, the temperature is controlled at 120°C, and the injection molding is carried out, and t...

Embodiment 3

[0036] In order to overcome the problem that the packer rubber cylinder in the prior art cannot be repeatedly set, unsealed, and withstand high pressure, or cannot be applied to drag fracturing conditions, this embodiment produces a kind of figure 1 The composite packer rubber cylinder shown includes a sealing rubber cylinder 1, the end of the sealing rubber cylinder 1 is provided with a supporting rubber cylinder 2, and both the sealing rubber cylinder 1 and the supporting rubber cylinder 2 are in the shape of a cylinder. The inner and outer diameters of the sealing rubber cylinder 1 and the supporting rubber cylinder 2 are the same, and the length of the sealing rubber cylinder 1 is longer than that of the supporting rubber cylinder 2 .

[0037] Wherein, the supporting rubber cylinder 2 is located at one end or both ends of the sealing rubber cylinder 1; the sealing rubber cylinder 1 and the supporting rubber cylinder 2 are an integral structure combined by a vulcanization pr...

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Abstract

The invention belongs to the technical field of fracturing of oilfields, and specifically provides a preparation method of a compound packer rubber barrel. The method comprises the steps of 1) performing injection and production for a supporting rubber barrel; 2) roughening the combination surface between the supporting rubber barrel and a sealing rubber barrel, applying an adhesive, and drying in the air for later use; 3) feeding the supporting rubber barrel subjected to injection and production and with adhesive into a compound packer rubber barrel die, keeping the adhering surface of the supporting rubber barrel upward, and then feeding compounded rubber stock of the sealing rubber barrel into an injection chamber of the compound packer rubber barrel die for injection and molding. With the adoption of the method, the shortages that the general packer rubber barrel with an end part protection mechanism cannot be repeatedly set and released can be overcome, and the service life of the compound packer rubber barrel under a high-temperature and high-pressure condition can be obviously prolonged.

Description

technical field [0001] The invention belongs to the technical field of oil field fracturing, and in particular relates to a composite packer rubber cartridge and a preparation method thereof, which is suitable for repeated setting and unsealing of packers, and multiple stages can be completed by dragging one packer at a time. Fracturing conditions. Background technique [0002] The packer is a key tool for downhole oil production in oilfields, and is widely used in various operations such as oilfield injection, layered reconstruction, fracturing, layered oil production, mechanical pipeline water plugging, etc.; The main component, its quality directly affects the normal use effect and service life of the packer, and plays a decisive role in the packer. [0003] At present, the common fracturing packer rubber cartridges mainly have two structural forms: one is a rubber cartridge with an end protection mechanism, which is generally used in high temperature and high pressure c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/127B29C45/14B29B11/08
CPCB29C45/1418E21B33/1277
Inventor 任国富王在强王治国蒙鑫邵媛冯飞
Owner PETROCHINA CO LTD