Abstract: The present invention relates to a well tool system for forming a permanent barrier in a well, the system comprising: a well tool device comprising a pyrotechnic mixture and an ignition device provided within or adjacent to the pyrotechnic mixture; a tool string connected above the well tool device; and a replenishment string connected between the well tool device and tool string. The replenishment string comprises pyrotechnic mixture. The elevating device is configured to control the movement of the replenishment string towards a heat generating process started by means of the ignition device.

Abstract: This invention relates to a thermite reaction charge comprising bismuth oxide and aluminium adapted to react with a reaction rate giving a reaction time of 8 to 15 seconds for a thermite reaction charge of 30 to 100 kg from initialisation of the thermite reaction charge to at least 90% of the thermite reaction charge is reacted, a method for forming a three-phased rock-to-rock barrier by applying the thermite reaction charge and a well barrier formed thereof.

Abstract: A well tool device for forming a permanent well barrier includes a housing having a circular cross-section and a longitudinal extension; a pyrotechnic mixture provided in the housing; a flow generating device provided in the housing; and a motor for driving the flow generating device. After ignition, the pyrotechnic mixture turns into a molten mass; and the flow generating device is configured to generate a forced flow of the molten mass. A method for forming a permanent well barrier using the well tool device includes installing the well tool device in a well; and igniting the pyrotechnic mixture. The pyrotechnic mixture turns into a molten mass upon ignition. The method further includes starting the motor; and generating a forced flow of molten mass by the flow generating device.

Abstract: A well tool device having a movable partition device within a housing, the partition device separating an inner volume of the housing into a first compartment and a second compartment, a pyrotechnic mixture in the first compartment, and a fluid line providing fluid communication between the second compartment and an outside of the housing. A method includes, while running the well tool device into the well, equalizing a pressure difference between the second compartment and an ambient pressure outside of the housing, by means of allowing fluids to enter the second compartment through the fluid line, while running the well tool device into the well, equalizing a pressure difference between the first compartment and a pressure inside the second compartment, by means of the partition device being affected by the pressure inside the second compartment, installing the well tool device in the well, and igniting the pyrotechnic mixture.

Abstract: A well tool device for forming a permanent barrier in a well includes a housing and an ignition device. A compartment is provided in the housing. A pyrotechnic mixture or heat generating mixture is provided within the compartment. The ignition device is adapted to heating at least a part of the pyrotechnic mixture or the heat generating mixture to its ignition temperature. If the pyrotechnic mixture is provided, the pyrotechnic mixture includes a first metal and at least a section of the housing is made of the first metal. If the heat generating mixture is provided, at least a section of the housing is made from a material being a constituent of the heat generating mixture.

Abstract: A well tool device for forming a permanent barrier in a well includes a housing and an ignition device. A compartment is provided in the housing. A pyrotechnic mixture or heat generating mixture is provided within the compartment. The ignition device is adapted to heating at least a part of the pyrotechnic mixture or the heat generating mixture to its ignition temperature. If the pyrotechnic mixture is provided, the pyrotechnic mixture includes a first metal and at least a section of the housing is made of the first metal. If the heat generating mixture is provided, at least a section of the housing is made from a material being a constituent of the heat generating mixture.

Abstract: A well tool device for forming a permanent well barrier includes a housing having a circular cross-section and a longitudinal extension; a pyrotechnic mixture provided in the housing; a flow generating device provided in the housing; and a motor for driving the flow generating device. After ignition, the pyrotechnic mixture turns into a molten mass; and the flow generating device is configured to generate a forced flow of the molten mass. A method for forming a permanent well barrier using the well tool device includes installing the well tool device in a well; and igniting the pyrotechnic mixture. The pyrotechnic mixture turns into a molten mass upon ignition. The method further includes starting the motor; and generating a forced flow of molten mass by the flow generating device.

Abstract: A system and a method of an ignitor for electrical ignition of an exothermic mixture to be used in wells, for the purposes of reinstatement of a barrier in well(s), subterranean storage reservoirs for a variety of potential environmental damaging materials such as CO2, radioactive storage, and other uses. Additionally, the ignitor may include a housing with a compartment within the housing, a first exothermic mixture of at least a metal and an oxide provided in the compartment, a first electrode connectable to a first terminal of a power supply, and a second electrode connectable to a second terminal of the power supply.

Abstract: A well operation tool may be used in a pressurized environment, where the pressurized environment has a pressure above 1 atmospheric pressure, and a method of preventing inflow into the well operation tool. Additionally, the well operation tool may include a pressure-sealed housing, a combustion chamber provided within the pressure-sealed housing, an ignition material provided within the combustion chamber, an ignition device for igniting the ignition material, and a gas producing material provided within the combustion chamber. Furthermore, the gas producing material is configured to release gas when subjected to a temperature above a threshold value due to an ignition of the ignition material.

Abstract: A system and a method of an ignitor for electrical ignition of an exothermic mixture to be used in wells, for the purposes of reinstatement of a barrier in well(s), subterranean storage reservoirs for a variety of potential environmental damaging materials such as CO2, radioactive storage, and other uses. Additionally, the ignitor may include a housing with a compartment within the housing, a first exothermic mixture of at least a metal and an oxide provided in the compartment, a first electrode connectable to a first terminal of a power supply, and a second electrode connectable to a second terminal of the power supply.

Abstract: Method and use of abandoning a well (2) or removing a well element (10) which is arranged in a well (2) by melting surrounding materials or by melting the well element (10), the method comprising the steps of; providing an amount of a heat generating mixture (6), the amount (6) being adapted to perform one of the desired operations, positioning the heat generating mixture (6) at a melting position in the well (2), igniting the heat generating mixture (6), thereby melting the surrounding materials in the well (2) or melting the well element (10).