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Production method for high-temperature bearing composite material insulator especially for petroleum logger

A technology of petroleum logging and composite materials, which is applied in the direction of insulators, inorganic insulators, glass manufacturing equipment, etc., can solve problems such as unsatisfactory, poor insulation performance, and bursting of insulators, so as to prolong the normal service life, excellent electrical insulation performance, and insulation good performance

Active Publication Date: 2008-05-07
西安永兴科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, enterprises that produce petroleum logging instruments rely almost entirely on imports of composite material insulators, which are very expensive
Although there are many units producing insulating materials in China, none of them can meet the requirements for insulators in the special environmental medium of petroleum logging instruments, that is, they have excellent insulation properties in high temperature, pressurized oil, steam, water and other media (175°C) , 140MPa insulation value ≥ 500MΩ)
Some of the insulating materials used in the prior art have excellent high temperature resistance, but poor pressure bearing capacity, and even the insulator bursts just after reaching a certain part of the well, which cannot be used for the requirements of oil well logging for insulators; some have excellent Pressure bearing capacity and high temperature resistance are also very good, but the insulation performance is poor
Under the conditions of 3000 meters underground, the temperature is about 150°C, and the pressure is about 140MPa, there are harmful acid and alkali substances such as oil, steam, and water in the oil well, and the environment is very complicated. Generally speaking, the high temperature resistance is easy to solve, but in the case of In the medium of oil, gas, water and other harmful substances and the downhole has a high pressure, water can easily seep into the insulator, resulting in non-insulation (zero value) or low insulation value, and there are logging data errors and offsets and other defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The preparation method of the special high-temperature pressure-bearing composite insulator for petroleum logging equipment is characterized in that it is carried out according to the following steps:

[0055] 1. Selection of glass fiber

[0056]Glass fiber can be chopped loose filament or roving or chopped fiber mat, one of which can be selected according to different purposes;

[0057] 1) Chopped loose filaments, the tow length is 3-25mm, the fiber diameter is 9-13mm, and the linear density is between 35-306 tex;

[0058] 2) The roving is suitable for continuous production, and its fiber specification range is 200-2400 tex;

[0059] 3) The density of chopped strand mat is 20-45 tex;

[0060] All glass fibers used must be covered with a special sizing agent, which consists of 0.5 to 1 part of KH550 defoamer and 2 to 10 parts of γ-aminopropyltriethoxysilane NH 2 -CH 2 -CH 2 -CH 2 -Si-(OC 2 h 5 ) 3 Composition of coupling agent;

[0061] Second, glass fiber sil...

Embodiment 2

[0078] A method for preparing a high-temperature pressure-bearing composite material insulator for petroleum well logging instruments, and a method for preparing a high-temperature pressure-bearing composite material insulator for petroleum well logging instruments are carried out according to the following steps:

[0079] 1. Selection of glass fiber

[0080] Glass fiber can be chopped loose filament or roving or chopped fiber mat, one of which can be selected according to different purposes;

[0081] 1) Chopped loose filaments, the tow length is 5-20mm, the fiber diameter is 10-12mm, and the linear density is between 40-300 tex;

[0082] 2) The roving is suitable for continuous production, and its fiber specification range is 300-2200 tex;

[0083] 3) The density of chopped strand mat is 25-40 tex;

[0084] All glass fibers used must be covered with a special sizing agent, which consists of 0.6 to 0.9 parts of KH550 defoamer and 3 to 9 parts of γ-aminopropyltriethoxysilane ...

Embodiment 3

[0102] The preparation method of the special high-temperature pressure-bearing composite insulator for petroleum logging instruments is carried out according to the following steps:

[0103] 1. Selection of glass fiber

[0104] Glass fiber can be chopped loose filament or roving or chopped fiber mat, one of which can be selected according to different purposes;

[0105] 1) Chopped loose filaments, the tow length is 10-15mm, the fiber diameter is 10-11mm, and the linear density is between 50-250tex;

[0106] 2) The roving is suitable for continuous production, and its fiber specification range is 400-2000 tex;

[0107] 3) The density of chopped strand mat is 30-35 tex;

[0108] All glass fibers used must be covered with a special sizing agent, which consists of 0.7 to 0.8 parts of KH550 defoamer and 5 to 8 parts of γ-aminopropyltriethoxysilane NH 2 -CH2 -CH 2 -CH 2 -Si-(OC 2 h 5 ) 3 Composition of coupling agent;

[0109] Second, glass fiber silanization coupling agent...

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Abstract

The invention discloses a preparation method for special high-temperature pressure-bearing composite material insulator used for a petroleum logging tool. The preparation method is performed in the following steps: silanizing coupling pretreatment are first performed to high intensity glass fiber chopped strands, nano silicon dioxide and black carbon are added into the well treated glass fiber chopped strands or twistless roving or chopped strand mats in vacuum state, the components are positioned into a vacuum performing die for evacuation, crack resistant material and hydrophobic material are added into high-temperature resin glue to perform stirring and standing in the vacuum state; the sizing material after the standing is poured into a vacuum pressure pot, a valve is opened in order to ensure the sizing material to flow upward in countercurrent manner, in order to fill up the preforming die; the upper valve and the lower valve of the performing die are closed, the preforming die is positioned into oil to be heated, and then high temperature pressure bearing test is performed to measure the insulation value under the indexes of 175 DEG C and 140 MPa. The invention has the advantages of high temperature resistance, acid and alkali resistance, low cost, simple technology, and good insulation performance, and when the insulation value is higher than or equal to 500 M Omega, the insulator is determined to be qualified.

Description

technical field [0001] The invention relates to a preparation method of an insulating material, in particular to a preparation method of a special high-temperature pressure-bearing composite material insulator for petroleum logging instruments. Background technique [0002] At present, enterprises that produce petroleum logging instruments rely on imports for almost all of their composite insulators, which are very expensive. Although there are many units producing insulating materials in China, none of them can meet the requirements for insulators in the special environmental medium of petroleum logging instruments, that is, they have excellent insulation properties in high temperature, pressurized oil, steam, water and other media (175°C) , 140MPa insulation value ≥ 500MΩ). Some of the insulating materials used in the prior art have excellent high temperature resistance, but poor pressure bearing capacity, and even the insulator bursts just after reaching a certain part o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B3/08H01B3/00C03B37/00
Inventor 吴亚民
Owner 西安永兴科技发展有限公司
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