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Polyurethane self-sealing rubber core for well drilling and production process

A production process, polyurethane technology, applied in the field of organic synthetics, can solve the problems of polyurethane physical and mechanical properties decline, self-sealing rubber core life is not long, rubber physical and mechanical properties are poor, etc., to achieve good dynamic mechanical properties, slow down the impact Good heat and humidity resistance

Inactive Publication Date: 2009-07-15
ZIBO SAITONG POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of both is high temperature and high pressure molding, during which it is easy to cause people to be scalded and the mold to be crushed.
Among them, the traditional rubber self-sealing rubber core, due to the poor physical and mechanical properties of the rubber itself, poor wear resistance, etc., the service life of the self-sealing rubber core is not long
Although the wear resistance of ordinary polyurethane self-sealing rubber cores has been improved, in special environments, especially in the case of strong acid, strong alkali, high water temperature and high-speed operation, the molecular chain of polyurethane is destroyed, and the physical and mechanical properties of polyurethane itself are greatly improved. Decrease, eventually leading to the service life of the self-sealing rubber core is not long, limiting the use of polyurethane in drilling self-sealing rubber core

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of polyurethane self-sealing rubber core formula.

[0036] 1. The first step, the first mixing reaction of the selected raw materials:

[0037] (1) Preparation of component A:

[0038] Weigh polycaprolactone polyol (1000Mw) 1000g in the airtight container with stirrer, after stirring the mixture of 1g benzoyl chloride or phosphoric acid or hydrochloric acid under the environment of 110 ℃ for 2 hours, the mixture material begins to cool down, less than It can be used after 80°C.

[0039] (2) Prepare component B, using phenylene diisocyanate;

[0040] (3) Preparation of component C:

[0041] Weigh 84.6g of butanediol, 0.1g of benzoyl chloride, and 0.02g of organic zinc in a closed container with a stirrer. After the mixture is stirred for 2 hours at 110°C, the temperature of the mixture begins to drop, and it is less than 80°C. It can be used after ℃.

[0042] 2. The second step, the second mixing reaction of the selected raw materials

[0043] (1) Pr...

Embodiment 2

[0059] 1. Preparation of polyurethane self-sealing rubber core formula.

[0060] 1. The first step, the first mixing reaction of the selected raw materials:

[0061] (1) Preparation of component A:

[0062] Weigh 300g of polycaprolactone polyol (1000Mw) and 700g of polytetrahydrofuran ether polyol (1000Mw) in a closed container with a stirrer, stir the mixture with 1g of benzoyl chloride or phosphoric acid or hydrochloric acid at 110°C After 2 hours, the mixed material starts to cool down, and it can be used after it is lower than 80°C.

[0063] (2) Prepare component B, using phenylene diisocyanate;

[0064] (3) Preparation of component C:

[0065] Weigh 84.6g of butanediol, 0.1g of benzoyl chloride, and 0.02g of organic zinc in a closed container with a stirrer. After the mixture is stirred for 2 hours at 110°C, the temperature of the mixture begins to drop, and it is less than 80°C. It can be used after ℃.

[0066] 2. The second step, the second mixing reaction of the s...

Embodiment 3

[0083] 1. Preparation of polyurethane self-sealing rubber core formula.

[0084] 1. The first step, the first mixing reaction of the selected raw materials:

[0085] (1) Preparation of component A:

[0086] Weigh 300g of polycaprolactone polyol (1000Mw) and 700g of polytetrahydrofuran ether polyol (1000Mw) in a closed container with a stirrer, stir the mixture with 1g of benzoyl chloride or phosphoric acid or hydrochloric acid at 110°C After 2 hours, the mixed material starts to cool down, and it can be used after it is lower than 80°C.

[0087] (2) Prepare component B, using phenylene diisocyanate;

[0088] (3) Preparation of component C:

[0089] Weigh 84.6g of butanediol, 0.1g of benzoyl chloride, and 0.02g of organic zinc in a closed container with a stirrer. After the mixture is stirred for 2 hours at 110°C, the temperature of the mixture begins to drop, and it is less than 80°C. It can be used after ℃.

[0090] 2. The second step, the second mixing reaction of the s...

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Abstract

The invention discloses a well-drilling polyurethane self-sealing rubber core and a production process thereof, relating to a formulation design of a well-drilling polyurethane self-sealing rubber core and a preparation process thereof. The invention is characterized in that the formulation contains a component 1 and a component 2, and the ratio of component 1 to component 2 is 100:6 to 100:600 by mass ratio; the component 1 contains 0-76.4% of component A and 23.6-100% of component B in terms of mass percentage, while the component 2 contains 0-90% of component A and 10-100% of component C terms of mass percentage; and the component A contains polyalcohol, benzoyl chloride, phosphoric acid or hydrochloric acid, the component B is polyisocyanate, and the component C contains trimethylolpropane, glycol or ethylene glycol, inorganic filler, energy auxiliary agent and anti-foaming agent, benzoyl chloride, phosphoric acid or hydrochloric acid, and catalyst. The production process decreases the operation temperature in the production process, and reduces chemical gas emission, the power consumption and the harm to operators.

Description

technical field [0001] The invention belongs to the field of organic compounds, and in particular relates to the formula design and production process of a polyurethane self-sealing rubber core for well drilling. Background technique [0002] The existing self-sealing rubber core materials for drilling in China are mainly rubber, and polyurethane materials have also appeared continuously in recent years. The production process of both is high-temperature and high-pressure molding, during which it is easy to cause people to be scalded and the mold to be crushed. Among them, the traditional rubber self-sealing rubber core, due to the poor physical and mechanical properties of the rubber itself, poor wear resistance, etc., the service life of the self-sealing rubber core is not long. Although the wear resistance of ordinary polyurethane self-sealing rubber cores has been improved, in special environments, especially in the case of strong acid, strong alkali, high water tempera...

Claims

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Application Information

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IPC IPC(8): C08G18/72C08G18/42C08G18/48E21B21/00B29C35/02
Inventor 陆兴明白绍敏张志强
Owner ZIBO SAITONG POLYURETHANE
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