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

A solid propellant and high-temperature-resistant technology, which is applied in the direction of offensive equipment, inorganic oxyhalide salt explosive composition, explosives, etc., can solve the problems of 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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Effect test

preparation example Construction

[0037] 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:

[0038] Step 1, according to the proportion of the formula, in terms of weight percentage, the high temperature resistant epoxy resin is 10.00% to 32.37%, the bisphenol A epoxy resin is 0 to 11.79%, and the epoxy resin reactive diluent is 0 to 12.77%. Add foaming agent 0.03% into the mixing pot and pre-mix for 10 minutes;

[0039] Step 2: In terms of weight percentage, 33.00% to 58.00% of potassium perchlorate and 8.00% to 33.00% of 1,3,5-triamino-2,4,6-trinitrobenzene are added to the system of step 1, After mixing for 50 minutes, add 2-ethyl-4-methylimidazole at 0.98% to 1.60%, and stop mixing after 15 minutes to obtain a syrup;

[0040] 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-tempe...

Embodiment 1

[0043]The high-temperature-resistant solid propellant for oil and gas deep wells of this embodiment is composed of the following raw materials in weight percentage: 33.00% of potassium perchlorate, 33.00% of TATB, 14.40% of TGDDM, 5.40% of epoxy resin E-51, and Cresyl glycidyl ether is 12.77%, silicone resin is 0.03%, and 2-ethyl-4-methylimidazole is 1.40%.

[0044] Performance Testing:

[0045] Detonation heat is determined by GJB770B-2005 method 701.2 detonation heat and combustion heat constant temperature method.

[0046] The specific volume is measured according to GJB770B-2005 method 702.1 specific volume pressure sensor method.

[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) Temperature control point: the thermocouple is suspended directly above the sample, not in contact with the sample. The thermal weight loss of the sample is not more than 3%, and the test is passed if it is neit...

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: 41.00% of potassium perchlorate, 25.00% of TATB, 32.37% of TGDDM, 0.03% of silicone resin, 2-ethyl -4-methylimidazole 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]

[0059] It can be concluded from Table 2 that the propellant has moderate heat of detonation (ie, energy), moderate specific volume, and high temperature resistance, water resistance and salt water resistance all meet the performance requirements. 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: 33.00-58.00% of potassium perchlorate, 8.00-33.00% of TATB, 10.00-32.37% of high-temperature-resistant epoxy resin, 0-11.79% 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, remixing and molding so as to prepare a finished product. 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 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): C06B29/16
Inventor 王国强李吉祯张殿红蔚红建李勇宏胥会祥党永战梁勇付小龙刘晓军张正中李洋石小兵
Owner XIAN MODERN CHEM RES INST
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