Provided is an oxygen candle starting device, comprising a pull line column (17) and a percussion cap (15), wherein a pull line hole (155) is provided in the pull line column in an axial direction of the pull line column, a percussion cap cavity (154) is provided inside one end of the pull line column, a fire-preventing cavity is provided inside the other end of the pull line column, and the pull line hole passes through the fire-preventing cavity and the percussion cap cavity; the percussion cap is mounted in the percussion cap cavity, and sand grains (16) are packaged in the fire-preventing cavity. Further provided is an oxygen candle comprising the oxygen candle starting device and an oxygen generator, wherein the oxygen generator comprises an agent loading housing, with a through hole being provided in the top of the agent loading housing, a gas outlet being provided in the bottom thereof, and a filter being mounted at the gas outlet; and the percussion cap of the oxygen candle starting device is in contact with an oxygen candle agent via the through hole, the oxygen generator is connected to the agent loading housing in a sealed manner, and the filter is connected to the gas outlet in a sealed manner. The oxygen candle employs a pull-type starting device, and the starting structure for an existing oxygen candle is simplified, thereby preventing a false start caused by the falling-off of a steel needle and improving the reliability.

A hot-gas-generating apparatus for reacting a propellant comprises a combustion chamber, at least one injector that is arranged upstream of the combustion chamber and can be closed, on the combustion chamber side, to the propellant, electrodes being integrated in said injector, and at least one supply line for the propellant. In this context, the propellant is a monopropellant and a substantially water-free ionic solution having low vapor pressure, preferably with a residual water content of less than five percent by mass, which is capable of self-sustaining combustion at a given combustion chamber pressure, and the electrodes have at least two electrodes of opposite polarity which are suitable for electrically igniting the propellant by means of a flow of current through the propellant when this propellant flows between the opposite-polarity electrodes.

A hot-gas-generating apparatus for reacting a propellant comprises a combustion chamber, at least one injector that is arranged upstream of the combustion chamber and can be closed, on the combustion chamber side, to the propellant, electrodes being integrated in said injector, and at least one supply line for the propellant. In this context, the propellant is a monopropellant and a substantially water-free ionic solution having low vapor pressure, preferably with a residual water content of less than five percent by mass, which is capable of self-sustaining combustion at a given combustion chamber pressure, and the electrodes have at least two electrodes of opposite polarity which are suitable for electrically igniting the propellant by means of a flow of current through the propellant when this propellant flows between the opposite-polarity electrodes.

Provided is an oxygen candle starting device, comprising a pull line column (17) and a percussion cap (15), wherein a pull line hole (155) is provided in the pull line column in an axial direction of the pull line column, a percussion cap cavity (154) is provided inside one end of the pull line column, a fire-preventing cavity is provided inside the other end of the pull line column, and the pull line hole passes through the fire-preventing cavity and the percussion cap cavity; the percussion cap is mounted in the percussion cap cavity, and sand grains (16) are packaged in the fire-preventing cavity. Further provided is an oxygen candle comprising the oxygen candle starting device and an oxygen generator, wherein the oxygen generator comprises an agent loading housing, with a through hole being provided in the top of the agent loading housing, a gas outlet being provided in the bottom thereof, and a filter being mounted at the gas outlet; and the percussion cap of the oxygen candle starting device is in contact with an oxygen candle agent via the through hole, the oxygen generator is connected to the agent loading housing in a sealed manner, and the filter is connected to the gas outlet in a sealed manner. The oxygen candle employs a pull-type starting device, and the starting structure for an existing oxygen candle is simplified, thereby preventing a false start caused by the falling-off of a steel needle and improving the reliability.

Thermite mixtures shaped or cast into a desired solid form and having sufficient structural integrity to withstand rough handling and challenging operating conditions, and methods of making such solid forms, are provided. When reacted, the thermite mixtures advantageously produce little or no offgas. The solid thermite forms may further include other materials that confer advantageous physical or chemical properties before, during, or after reaction of the thermite mixture.

A pyrotechnic delay composition comprising at least one oxidant and at least one reducing agent. This composition comprises tungsten as the first reducing agent, a first oxidant consisting of triiron tetraoxide, and a second oxidant having an oxygen content greater than that of the first oxidant.

Thermite mixtures shaped or cast into a desired solid form and having sufficient structural integrity to withstand rough handling and challenging operating conditions, and methods of making such solid forms, are provided. When reacted, the thermite mixtures advantageously produce little or no offgas. The solid thermite forms may further include other materials that confer advantageous physical or chemical properties before, during, or after reaction of the thermite mixture.

A downhole assembly comprises a first article; and a second article having a surface which accommodates a surface shape of the first article, wherein the first article is configured to provide a chemical, heat, or a combination thereof to facilitate the disintegration of the second article. A method comprises disposing a second article in a downhole environment; disposing a first article on the second article; the second article having a surface which accommodates a surface shape of the first article; performing a downhole operation; and disintegrating the first article to provide a chemical, heat, or a combination thereof that facilitates the disintegration of the second article.

THERMAL SPARK CONDUCTOR TUBE USING NANOMETRIC PARTICLES, refers to the Invention Patent for a thermal spark conductor tube, applied as a signal transmitter for connection and initiation of explosive columns, which employs a low toxicity nanometric pyrotechnic mixture, with superior thermal performance of the spark which maintains the advantages of the current pyrotechnic shock tube and has additional advantages of reducing or even eliminating the use of contaminants from underground water, presenting a lower risk of conducting an electrostatic discharge of the human body to its end, and to use pyrotechnic mixture production process quite simple and with less risk of accidents due to friction and mechanical shocks.

THERMAL SPARK CONDUCTOR TUBE USING NANOMETRIC PARTICLES, refers to the Invention Patent for a thermal spark conductor tube, applied as a signal transmitter for connection and initiation of explosive columns, which employs a low toxicity nanometric pyrotechnic mixture, with superior thermal performance of the spark which maintains the advantages of the current pyrotechnic shock tube and has additional advantages of reducing or even eliminating the use of contaminants from underground water, presenting a lower risk of conducting an electrostatic discharge of the human body to its end, and to use pyrotechnic mixture production process quite simple and with less risk of accidents due to friction and mechanical shocks.