Coating layer for fracturing bomb propulsive agents and preparation method therefor

A fracturing bomb propellant and coating technology, applied in the direction of adhesive, adhesive type, epoxy resin glue, etc., can solve the problems of pollution, failure to meet the use requirements, poor medium resistance, etc., and achieve simple process, Good water-proof effect and good fluidity

Inactive Publication Date: 2013-09-25
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the complex environment downhole, more stringent conditions are put forward for the charge of fracturing bombs, especially the higher and higher requirements for the temperature resistance level of propellants. Currently, there are fracturing bombs with a temperature resistance level of 150°C / 48h in this field. The formulation of the agent cannot meet the requirements of use because of its poor water resistance and medium resistance. In addition, the phenolic cloth tube used in the charge protects the shell. Due to incomplete combustion, it brings a lot of falling objects underground and serious pollution, so new ones are urgently needed. cladding material alternative

Method used

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  • Coating layer for fracturing bomb propulsive agents and preparation method therefor
  • Coating layer for fracturing bomb propulsive agents and preparation method therefor
  • Coating layer for fracturing bomb propulsive agents and preparation method therefor

Examples

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Effect test

Embodiment 1

[0039] A fracturing bomb propellant cladding layer, the cladding layer is composed of: silicone modified epoxy resin: 78.7%, hydroxyl-terminated polybutadiene: 7.9%, silicone water repellent: 1.6% , polyamide curing agent: 11.8%;

[0040] The propellant coating layer of the fracturing bomb described in this embodiment is prepared according to the following steps:

[0041] Step 1, take a clean container, and weigh the following components according to weight percentage: silicone modified epoxy resin: 78.7%, hydroxyl-terminated polybutadiene: 7.9%, silicone water repellent: 1.6%, poly Amide curing agent: 11.8%;

[0042] Step 2, after mixing and stirring the components weighed in step 1, transfer them to the spray gun storage tank, vacuum defoaming for 15 minutes, and obtain the rubber compound;

[0043] Step 3: Spray the glue obtained in Step 2 on the required coating surface of the propellant to be coated, and place it at room temperature for 8 hours to obtain a fracturing bo...

Embodiment 2

[0058] A fracturing bomb propellant coating layer, the weight percentage of the coating layer is composed of:

[0059] Silicone modified epoxy resin: 86.2%, hydroxyl-terminated polybutadiene: 4.3%, silicone water repellent: 0.9%, polyamide curing agent: 8.6%.

[0060] The propellant coating layer of the fracturing bomb described in this embodiment is prepared according to the following steps:

[0061] Step 1, take a clean container, and weigh the following components according to weight percentage: silicone modified epoxy resin: 86.2%, hydroxyl-terminated polybutadiene: 4.3%, silicone water repellent: 0.86%, poly Amide curing agent: 8.6%;

[0062] Step 2, after mixing and stirring the components weighed in step 1, transfer them to the spray gun storage tank, vacuum defoaming for 10 minutes, and obtain the rubber compound;

[0063] Step 3: Spray the sizing material obtained in Step 2 on the required coating surface of the propellant to be coated, and place it at room temperat...

Embodiment 3

[0080] A fracturing bomb propellant coating layer, the weight percentage of the coating layer is composed of:

[0081] Silicone modified epoxy resin: 82.84%, hydroxyl terminated polybutadiene: 5.8%, silicone water repellent: 0.86%, polyamide curing agent: 10.5%.

[0082] The propellant coating layer of the fracturing bomb described in this embodiment is prepared according to the following steps:

[0083] Step 1, take a clean container, and weigh the following components according to weight percentage: silicone modified epoxy resin: 82.84%, hydroxyl-terminated polybutadiene: 5.8%, silicone water repellent: 0.86%, poly Amide curing agent: 10.5%;

[0084] Step 2, after mixing and stirring the components weighed in step 1, transfer them to the spray gun storage tank, vacuum defoaming for 15 minutes, and obtain the rubber compound;

[0085] Step 3: Spray the glue obtained in Step 2 on the required coating surface of the propellant to be coated, and place it at room temperature fo...

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Abstract

The invention discloses a coating layer for fracturing bomb propulsive agents and a preparation method therefor. The method comprises steps: by weight, 78.7%-86.2% of silicone modified epoxy resin, 4.3%-7.9% of hydroxyl-terminated polybutadiene, 0.86%-1.6% of organosilicone water repellent and 8.6%-11.8% of polyamide curing agents are prepared, mixed evenly, and defoamed for 10-15 min under vacuum to obtain gel materials, the gel materials are sprayed on the propulsive agent coating surface which is to be coated, and placed at the room temperature for 2-8 h to obtain the coating layer for fracturing bomb propulsive agents. The coating layer has good performances of resistance to water, resistance to oil, resistance to acid, alkali and salt solutions, resistance to high temperature, resistance to high pressure and resistance to dropping, and has a good compatibility with the propulsive agents. The coating layer has good flowability, with a viscosity of 300-1000 cps, is suitable for pouring, spraying, brushing and other coating and molding technologies, and is advantaged by simple technology, convenience and reliable molding.

Description

technical field [0001] The invention relates to a multifunctional coating layer for propellants, which is mainly used for coating the charge of fracturing bombs in the field of oil field stimulation, and can also be used for coating the charge of rocket engines. Background technique [0002] After more than 40 years of joint research, exploration and on-site practice by pyrotechnic professionals and oilfield developers, deflagration fracturing has become one of the typical professional categories in the field of oilfield civil explosion, forming numerous technical systems and product series, and has obtained domestic Recognized by foreign oilfield markets, the accumulative increase in oil and gas equivalent has reached hundreds of millions of tons, and the combination of acidizing, hydraulic fracturing, and perforating technologies has become a common measure for increasing oil and gas well production. [0003] With the continuous advancement of the depth of oil resource dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C09J163/00C09J11/00
Inventor 张艳张晓宏时艺娟李宏岩王宝兴
Owner XIAN MODERN CHEM RES INST
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