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: A stinger for insertion into a polished bore receptacle is operable between at least two operational states. The at least two operational states include a closed state in which fluid flow through the through bore of the plug section is prevented and an open state in which fluid flow through the through bore of the plug section is allowed. An actuating system is operating the stinger from the closed state to the open state. The stinger is brought to the open state from the closed state as the stinger is pushed down into polished bore receptacle.

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 transporting a heat generating mixture into a well pipe includes an upper connection section, a main housing section, and an anchoring device. The main housing section includes a compartment for the heat generating mixture. The anchoring device is connected between the upper connection section and the main housing section. The main housing section includes a compartment subsection and a distance subsection. The compartment is located within the compartment subsection. The distance subsection is located above the compartment subsection.

Abstract: A well tool performs an operation in an oil/gas well. The well tool is insertable into a bore including a guide groove in an inner surface of the bore. The well tool includes: a mandrel having a longitudinal direction and a radial direction perpendicular to the longitudinal direction; and an orientation system for longitudinal and rotational orientation of the well tool with respect to the bore. The well tool further includes an outer housing arranged radially outside the mandrel. The orientation system includes: a radial opening provided in the outer housing; a finger sleeve including a longitudinally extending resilient finger with a distal part and a proximal part connected to the finger sleeve. The finger sleeve is arranged radially between the mandrel and the outer housing. The distal part includes a first wedge-shaped portion and a second wedge-shaped portion both extending in the outwards radial direction and tapering away from each other in the longitudinal direction.

Abstract: A method for providing a permanent barrier in a well includes lowering a first, particulate constituent of a pyrotechnic mixture to a desired location in the well, wherein the first constituent is a metal oxide. The method further includes waiting a first predetermined period of time to allow the first, particulate constituent to settle as sediment at the desired location, lowering a second constituent of the pyrotechnic mixture to the desired location in the well, wherein the second constituent is a metal, and igniting the pyrotechnic mixture to start a heat generating exothermic reduction-oxidation process.

Abstract: A well tool device, which is for injecting an injection fluid through a hole in a well bore, includes a mandrel, an expandable sleeve provided circumferentially outside of the mandrel, a first and second expander, an injection fluid system, and a control fluid system. The first expander is for moving a first side of the expandable sleeve between a radially retracted state and a radially expanded state. The second expander is for moving a second side of the expandable sleeve between a radially retracted state and a radially expanded state. The injection fluid system includes an injection fluid line and a nozzle element. The nozzle element provides fluid communication between the injection fluid line and an outlet provided on the outside of the expandable sleeve. The control fluid system controls the fluid pressure in a first fluid compartment provided radially between the expandable sleeve and the mandrel.

Abstract: A well tool device for transporting a heat generating mixture into a well pipe includes an upper connection section, a main housing section, and a sealing device. The main housing section includes a compartment for the heat generating mixture. The sealing device is provided below the main housing section. The sealing device includes a lower supporting element including a lower wedging surface; an upper wedging surface faced towards the lower wedging surface; and a sealing ring provided between the lower wedging surface and the upper wedging surface. The sealing element includes a plurality of thimble-shaped elements inserted into each other to form a torus. Relative axial movement between the lower wedging surface and the upper wedging surface in a direction towards each other provides radial expansion of the sealing element.

Abstract: A downhole well tool, which permanently seals a downhole well, includes a housing, a first compartment, an expandable sealing element, a metal body, a setting system, and a fluid line. The housing has an upper housing section and a lower housing section. The first compartment is provided within housing. The expandable sealing element is provided circumferentially outside the lower housing section, thereby forming a second compartment radially inside of the expandable sealing element and radially outside of the lower housing section. The metal body is provided within the first compartment. The setting system includes a heater for melting the metal body. The fluid line provides fluid communication between the first compartment and the second compartment.

Abstract: A downhole millable permanent plug, which permanently seals a downhole well, includes a mandrel, first and second sealing elements, a metal body, and a setting system. The mandrel has a longitudinal axis. The first sealing element is provided radially outside of the mandrel. The second sealing element is provided radially outside of the mandrel at a distance from the first sealing element. The metal body is provided radially outside of the mandrel between the first sealing element and the second sealing element. The setting system includes a heater for melting the metal body. The permanent well plug is configured to be in the following states: a run state, in which the first sealing element and the second sealing element are radially retracted; an intermediate state, in which the first sealing element and the second sealing element are radially expanded into contact with the well; and a set state, in which the metal body has been melted by the heater and subsequently solidified into contact with the well.

Abstract: A well tool device includes a housing; a through bore provided axially through the well tool device; and a frangible disc supported in the through bore by a first supporting device and a second supporting device. The through bore is defined with a bore wall. The second supporting device is axially displaceable in relation to the first supporting device. The well tool includes a shear element for preventing axial displacement of the second supporting device; a sealing element arranged radially outside of the frangible disc and radially inside of the bore wall when the well tool device is in a first state, in which the sealing element together with the frangible disc is configured to prevent axial fluid flow between a first side of the frangible disc and a second side of the frangible disc; and a disintegration device.

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 performs an operation in an oil/gas well. The well tool includes: a mandrel having a longitudinal direction and a radial direction perpendicular to the longitudinal direction; and an anchoring device for longitudinally locking the well tool to a bore including a lock groove. The anchoring device includes: a first ring arranged radially outside the mandrel; a second ring arranged radially outside the mandrel at a longitudinal distance from the first ring and movable in the longitudinal direction relative to the first ring; a spring element being substantially ring-shaped and arranged radially outside the mandrel; and a plurality of locking dogs distributed circumferentially on the spring element and located longitudinally between the first ring and the second ring. The anchoring device has a run state in which the first ring and the second ring are provided at an initial longitudinal distance from each other.

Abstract: A well tool performs an operation in an oil/gas well. The well tool is insertable into a bore including a guide groove in an inner surface of the bore. The well tool includes: a mandrel having a longitudinal direction and a radial direction perpendicular to the longitudinal direction; and an orientation system for longitudinal and rotational orientation of the well tool with respect to the bore. The well tool further includes an outer housing arranged radially outside the mandrel. The orientation system includes: a radial opening provided in the outer housing; a finger sleeve including a longitudinally extending resilient finger with a distal part and a proximal part connected to the finger sleeve. The finger sleeve is arranged radially between the mandrel and the outer housing. The distal part includes a first wedge-shaped portion and a second wedge-shaped portion both extending in the outwards radial direction and tapering away from each other in the longitudinal direction.

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 valve assembly for connection to an opening provided in a housing of a well tool device includes a fluid communication channel, a flapper valve device, a flapper element supporting device, and a securing device. The fluid communication channel provides fluid communication from an outside of the housing to a bore provided on the inside of the housing. The flapper valve device includes a flapper element configured to be in a closed position in which the fluid communication channel is closed and an open position in which the fluid communication channel is open. The flapper element is biased to the closed position. The flapper element supporting device supports the flapper element when the flapper element is in the open position. The securing device secures the flapper valve device and the flapper element supporting device to the opening. The securing device includes a through bore forming a first part of the fluid communication channel.

Abstract: An extrusion preventing device for incorporation into a sealing element of a well tool device includes a wire wound with a plurality of turns to form a torus-shaped coiled spring. Each turn of the torus-shaped coiled spring is canted. A method for manufacturing a sealing element for a well tool device includes providing a mould shaped as the sealing element; inserting an extrusion preventing device including a wire wound with a plurality of turns to form a torus-shaped coiled spring into the mould; filling molten elastomeric material into the mould, thereby incorporating the torus-shaped coiled spring into the molten elastomeric material; curing the elastomeric material; and retrieving the sealing element from the mould.

Abstract: A well tool device for transporting a heat generating mixture into a well pipe includes an upper connection section, a main housing section, and an anchoring device. The main housing section includes a compartment for the heat generating mixture. The anchoring device is connected between the upper connection section and the main housing section. The main housing section includes a compartment subsection and a distance subsection. The compartment is located within the compartment subsection. The distance subsection is located above the compartment subsection.

Abstract: A well tool device for transporting a heat generating mixture into a well pipe includes an upper connection section, a main housing section, and a sealing device. The main housing section includes a compartment for the heat generating mixture. The sealing device is provided below the main housing section. The sealing device includes a lower supporting element including a lower wedging surface; an upper wedging surface faced towards the lower wedging surface; and a sealing ring provided between the lower wedging surface and the upper wedging surface. The sealing element includes a plurality of thimble-shaped elements inserted into each other to form a torus. Relative axial movement between the lower wedging surface and the upper wedging surface in a direction towards each other provides radial expansion of the sealing element.