Preparation method for rubber article for packer

Abstract

The present invention provides a preparation method for a rubber article for a packer, and belongs to the field of preparation of rubber articles. In order to solve problems that a rubber packer prepared by a conventional method has a low degree of oil resistance, heat resistance and high pressure resistance and is easy to age, the present invention provides a preparation method of the rubber article for the packer. The method comprises mixing, softening and molding. During mixing, 23-type fluororubber, reinforcing filler, zinc oxide, magnesium oxide, an accelerant DM, an epoxy plasticiser, an anti-aging agent NBC and a vulcanizing agent BP are added into a double-roller open mill in turn, and a molding heating time and a heating temperature are controlled. The prepared rubber article can withstand a high temperature of 250 DEG C and a pressure of 60MPa, and has excellent properties of oil resistance and aging resistance, and can be widely used for a packer in petroleum drilling.

Description

technical field

[0001] The invention belongs to the field of preparation of rubber products, in particular to the field of preparation of rubber products used for packers in oil drilling. Background technique

[0002] Coiled tubing is relative to conventional single threaded tubing, also known as flexible tubing, serpentine tubing or coiled tubing. Long tubing mouth. In recent years, coiled tubing has been widely used in various downhole operations due to its high efficiency and economy, including sandblasting and perforating fracturing technology. The downhole tools used in coiled tubing sandblasting and perforating fracturing operations in foreign countries are divided into three types according to the isolation form: sand plug isolation, drillable bridge plug isolation and packer isolation. After the sand blasting and perforating operation, the sand plug isolation requires the second string to complete the sand flushing operation, and the drillable bridge plug requires ...

Examples

Embodiment 1

[0021] A kind of preparation method for the rubber product of packer, comprises the following steps:

[0022] a. Put 23 type fluorine rubber into the double-roller mill, then add reinforcing filler, zinc oxide, magnesium oxide, accelerator DM, epoxy plasticizer, anti-aging agent NBC and vulcanizing agent BP in sequence for mixing 250-350S, the temperature is maintained at 80°C to 100°C to obtain mixture A; the reinforcing filler is a combination of one or more of white carbon black, mica powder and fine particle calcium carbonate;

[0023] b. Add the softener fatty acid glyceride to the mixture A obtained in step a, and then knead for 200~300s to obtain the mixture B;

[0024] c. Put the mixture B obtained in step b into a mould, heat and form it, the heating temperature is 120°C-180°C, and the heating time is 600-900s, and the rubber product for the packer is obtained.

Embodiment 2

[0026] A kind of preparation method for the rubber product of packer, comprises the following steps:

[0027] a. Put 23 type fluorine rubber into the double-roller mill, then add reinforcing filler, zinc oxide, magnesium oxide, accelerator DM, epoxy plasticizer, anti-aging agent NBC and vulcanizing agent BP in sequence for mixing 250-300S, the temperature is kept at 90°C~100°C to obtain mixture A; the reinforcing filler is a mixture of white carbon black and mica powder;

[0028] b. Add softener fatty acid glyceride to mixture A obtained in step a, and then knead for 200~250s to obtain mixture B;

[0029] c. Put the mixture B obtained in step b into a mold, heat and form it, the heating temperature is 120°C-150°C, and the heating time is 600-800s, and the rubber product for the packer is obtained.

Embodiment 3

[0031] A kind of preparation method for the rubber product of packer, comprises the following steps:

[0032] a. Put 23 type fluorine rubber into the double-roller mill, then add reinforcing filler, zinc oxide, magnesium oxide, accelerator DM, epoxy plasticizer, anti-aging agent NBC and vulcanizing agent BP in sequence for mixing 300-350S, the temperature is maintained at 80°C to 90°C to obtain mixture A; the reinforcing filler is a mixture of white carbon black and fine particle calcium carbonate;

[0033] b. Add softener fatty acid glyceride to mixture A obtained in step a, and then knead for 250~300s to obtain mixture B;

[0034] c. Put the mixture B obtained in step b into a mould, heat and shape it, the heating temperature is 150°C-180°C, and the heating time is 700-900s, and the rubber product for the packer is obtained.

technical field

[0001] The invention belongs to the field of preparation of rubber products, in particular to the field of preparation of rubber products used for packers in oil drilling. Background technique

[0002] Coiled tubing is relative to conventional single threaded tubing, also known as flexible tubing, serpentine tubing or coiled tubing. Long tubing mouth. In recent years, coiled tubing has been widely used in various downhole operations due to its high efficiency and economy, including sandblasting and perforating fracturing technology. The downhole tools used in coiled tubing sandblasting and perforating fracturing operations in foreign countries are divided into three types according to the isolation form: sand plug isolation, drillable bridge plug isolation and packer isolation. After the sand blasting and perforating operation, the sand plug isolation requires the second string to complete the sand flushing operation, and the drillable bridge plug requires ...

Examples

Embodiment 1

[0021] A kind of preparation method for the rubber product of packer, comprises the following steps:

[0022] a. Put 23 type fluorine rubber into the double-roller mill, then add reinforcing filler, zinc oxide, magnesium oxide, accelerator DM, epoxy plasticizer, anti-aging agent NBC and vulcanizing agent BP in sequence for mixing 250-350S, the temperature is maintained at 80°C to 100°C to obtain mixture A; the reinforcing filler is a combination of one or more of white carbon black, mica powder and fine particle calcium carbonate;

[0023] b. Add the softener fatty acid glyceride to the mixture A obtained in step a, and then knead for 200~300s to obtain the mixture B;

[0024] c. Put the mixture B obtained in step b into a mould, heat and form it, the heating temperature is 120°C-180°C, and the heating time is 600-900s, and the rubber product for the packer is obtained.

Embodiment 2

[0026] A kind of preparation method for the rubber product of packer, comprises the following steps:

[0027] a. Put 23 type fluorine rubber into the double-roller mill, then add reinforcing filler, zinc oxide, magnesium oxide, accelerator DM, epoxy plasticizer, anti-aging agent NBC and vulcanizing agent BP in sequence for mixing 250-300S, the temperature is kept at 90°C~100°C to obtain mixture A; the reinforcing filler is a mixture of white carbon black and mica powder;

[0028] b. Add softener fatty acid glyceride to mixture A obtained in step a, and then knead for 200~250s to obtain mixture B;

[0029] c. Put the mixture B obtained in step b into a mold, heat and form it, the heating temperature is 120°C-150°C, and the heating time is 600-800s, and the rubber product for the packer is obtained.

Embodiment 3

[0031] A kind of preparation method for the rubber product of packer, comprises the following steps:

[0032] a. Put 23 type fluorine rubber into the double-roller mill, then add reinforcing filler, zinc oxide, magnesium oxide, accelerator DM, epoxy plasticizer, anti-aging agent NBC and vulcanizing agent BP in sequence for mixing 300-350S, the temperature is maintained at 80°C to 90°C to obtain mixture A; the reinforcing filler is a mixture of white carbon black and fine particle calcium carbonate;

[0033] b. Add softener fatty acid glyceride to mixture A obtained in step a, and then knead for 250~300s to obtain mixture B;

[0034] c. Put the mixture B obtained in step b into a mould, heat and shape it, the heating temperature is 150°C-180°C, and the heating time is 700-900s, and the rubber product for the packer is obtained.