Pyrotechnic composition for thermal pipe cutter and process for making same

A production process and pyrotechnic agent technology, applied in the direction of wellbore/well components, earthwork drilling, explosives, etc., to achieve the effect of safe use and convenient transportation

Inactive Publication Date: 2006-11-15
台州盛世环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, there is no pyrotechnic agent dedicated to the eager pipe cutter.

Method used

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  • Pyrotechnic composition for thermal pipe cutter and process for making same
  • Pyrotechnic composition for thermal pipe cutter and process for making same
  • Pyrotechnic composition for thermal pipe cutter and process for making same

Examples

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Embodiment Construction

[0022] First, mix 100 grams of aluminum powder and 300 grams of ferric oxide to make 400 grams of thermite. The thermite was mixed with 100 grams of gas forming agent. In this embodiment, the gas-forming agent is selected from nitrocellulose. This gives a powdery mixture. Then this mixture is put into the mold and pressed into a columnar body with an inner hole 13 in the center, that is, the pyrotechnic agent outer layer 11, such as figure 2 shown. Finally, the above-mentioned mixture that has not been compressed is loaded into the inner hole to become the pyrotechnic inner layer 12 .

[0023] Such as figure 1 and figure 2 As shown, in this embodiment, the density of the outer layer 11 of the pyrotechnic agent is relatively large, at 3.6g / cm 3 about. The density of the inner layer 12 is relatively small, at 1.7g / cm 3 about.

[0024] Such as figure 2 As shown, the cross-sectional shape of the pyrotechnic charge inner hole 13 is star-shaped. This is beneficial to i...

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Abstract

The pyrotechnic agent for the hot tube cutter provided by the invention and its production process belong to the technical field of chemical industry. The pyrotechnic agent of the eager pipe cutter is basically composed of thermite and gas-forming agent, and the weight percentage of each component is: 70%-95% of thermite and 5%-30% of gas-forming agent. Thermite is composed of aluminum and ferric oxide. The gas forming agent is a mixture of potassium permanganate and activated carbon, polytetrafluoroethylene or nitrocellulose. When the thermite reacts, high temperatures are generated and the gas-forming agent decomposes into gaseous products, thereby creating the internal pressure required to inject a stream of molten metal. The production process of this pyrotechnic agent is as follows: first, uniformly mix the thermite and gas-forming agent; then put the mixture into a mold and press it into a columnar body with an inner hole in the center, which becomes the outer layer of the pyrotechnic agent; finally, in the inner hole A mixture of thermite and gas-forming agent is charged to form the inner layer of the pyrotechnic agent, and the density of the inner layer is lower than that of the outer layer. The invention has the advantages of safe use and convenient transportation.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a pyrotechnic agent used for a hot pipe cutter and a production process thereof. Background technique [0002] During the drilling and recovery of oil and gas wells, geothermal wells, coalbed methane wells and water wells, pipes such as drill pipes, tubing, casings and packers are often stuck due to mechanical failure, poor downhole conditions and human errors, causing stuck pipes ACCIDENT. With the increase of inclined wells and directional wells with an angle greater than 42 degrees, pipe stuck accidents also increased significantly. In the Gulf of Mexico, pipe stuck accidents in directional wells account for about 91%. [0003] When a stuck tube accident occurs, the tube needs to be separated. The existing methods for separating pipe fittings include: explosive loosening, chemical pipe cutting and energy-concentrating pipe cutti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B43/00E21B31/00E21B29/02
Inventor 阮卜琴林西华刘晋仁廖政权戴文祥董永吉
Owner 台州盛世环境工程有限公司
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