High temperature resistant solid propellant for oil and gas deep wells and preparation method thereof

A solid propellant, high temperature resistance technology, applied in the direction of attack equipment, compressed gas generation, etc., can solve problems such as inability to use, and achieve the effect of good temperature resistance and excellent hydrolysis resistance.

Inactive Publication Date: 2015-10-28
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potassium nitrate has a high solubility in water, 31.6 grams at 20°C and 85.5 grams at 50°C, and the higher the temperature, the greater the solubility, so it cannot be used in a high-temperature (greater than 150°C) multi-water environment.

Method used

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  • High temperature resistant solid propellant for oil and gas deep wells and preparation method thereof
  • High temperature resistant solid propellant for oil and gas deep wells and preparation method thereof
  • High temperature resistant solid propellant for oil and gas deep wells and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0035] The preparation method of the above-mentioned high-temperature-resistant solid propellant for oil and gas deep wells, the method is carried out according to the following steps:

[0036] Step 1, according to the proportion of the formula, by weight percentage, the high temperature resistant epoxy resin is 10.00% to 43.37%, the bisphenol A epoxy resin is 0 to 11.40%, the epoxy resin active diluent is 0 to 12.77% and the disinfectant Add foaming agent 0.03% into the mixing pot and pre-mix for 10 minutes;

[0037] Step 2, in terms of weight percentage, add potassium perchlorate to the system of step 1 at a rate of 55.00% to 73.00%, after mixing for 50 minutes, add 2-ethyl-4-methylimidazole at a rate of 0.98% to 1.60%, and mix for 15 Stop mixing after 10 minutes, obtain syrup;

[0038] Step 3: pour the slurry obtained in step 2 into a mold, put it into a 70°C oven for curing for 24 hours, and remove the mold to obtain a finished high-temperature-resistant solid propellant....

Embodiment 1

[0041] The high-temperature-resistant solid propellant for oil and gas deep wells of this embodiment is composed of the following raw materials in terms of weight percentage: 60.00% of potassium perchlorate, 14.40% of TGDDM, 11.40% of epoxy resin E-51, and o-cresyl glycidyl ether 12.77%, silicone resin 0.03%, 2-ethyl-4-methylimidazole 1.40%.

[0042] Performance Testing:

[0043] Detonation heat is determined by GJB770B-2005 method 701.2 detonation heat and combustion heat constant temperature method.

[0044] The specific volume is measured according to GJB770B-2005 method 702.1 specific volume pressure sensor method.

[0045] Impact sensitivity, characteristic drop height H 50 Measured according to GJB772A-97 method 601.2.

[0046] Friction sensitivity and explosion probability P are measured according to GJB772A-97 method 602.1.

[0047]The test method of high temperature resistance is: Ф20mm×20mm powder column (1) 3°C / min rise to 180°C, keep warm for 48h; (2) Temperatu...

Embodiment 2

[0054] The high-temperature-resistant solid propellant for oil and gas deep wells of this embodiment is composed of the following raw materials in terms of weight percentage: 55.00% potassium perchlorate, 43.37% TGDDM, 0.03% silicone resin, 2-ethyl-4-methyl Imidazole is 1.60%.

[0055] The performance test method of the high-temperature-resistant solid propellant for oil and gas deep wells in this embodiment is the same as that in Embodiment 1, and the performance test results are shown in Table 2.

[0056] Table 2 embodiment 2 each performance test result

[0057]

[0058] It can be concluded from Table 2 that the propellant has moderate heat of detonation (ie, energy), high specific volume, and high temperature resistance, water resistance and salt water resistance all meet the performance requirements. At the same time, the friction sensitivity and impact sensitivity are also excellent. Suitable for oil and gas deep well heat-resistant fracturing ammunition.

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Abstract

The invention provides a high-temperature-resistant solid propellant for a deep oil-gas well. The solid propellant is prepared from the following raw materials in percentage by weight: 55.00-73.00% of potassium perchlorate, 10.00-43.37% of high-temperature-resistant epoxy resin, 0-11.40% of bisphenol A epoxy resin, 0-12.77% of epoxy-resin reactive diluent, 0.03% of defoamer and 0.98-1.60% of 2-ethyl-4-methylimidazole, wherein the sum of the weight percent of the raw materials is 100%; and the raw materials of the propellant are subjected to premixing and remixing and are finally poured into a mold for molding so as to prepare a finished product. The solid propellant has excellent hydrolysis resistance; when the solid propellant is soaked in clean water and 3.5% brine for 24-48 hours, the loss of weight is lower than 3%, and the volume change is lower than 2%; and the temperature resistance is better, the temperature resisting level reaches 180 DEG C in 48 hours, and the spontaneous combustion does not occur, thus the solid propellant can be used in high-temperature watery environment.

Description

technical field [0001] The invention belongs to the field of heat-resistant fracturing bomb charges for oil and gas deep wells, and relates to a propellant, in particular to a high-temperature-resistant solid propellant for oil and gas deep wells and a preparation method thereof. Background technique [0002] Deflagration fracturing using gunpowder charges has a history of nearly 40 years of development at home and abroad. Various fracturing bomb products or technologies such as steel shell type and shellless type have been widely used in oil fields, and have achieved good production increase. Note the effect. Deflagration fracturing technology uses specific propellant charges to burn at high speed in the oil-producing layer of oil and gas wells to generate high-temperature and high-pressure pulsed gas, fracturing the formation to form multiple radial fractures radially from the wellbore, and to remove oil and gas layer pollution and blockages , effectively reduce the forma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06D5/10
Inventor 王国强李吉祯张殿红李勇宏王晗冯国富胥会祥谢明召黄小悟王晓飞张亚俊张昊越屈蓓
Owner XIAN MODERN CHEM RES INST
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