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.

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.

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.

An inflatable down hole bag includes an inflatable body for holding an inflation fluid and a container for holding one or more substances. The container is disposed inside of the inflatable body and includes a closure for keeping the one or more substances in the container when the closure is in an inoperative state. The closure also releases the one or more substances from the container when the closure is in an operative state. Release of a substance causes an inflation fluid producing reaction within the inflatable body, thereby inflating the inflatable body. The container includes at least two separated chambers. Each chamber holds a respective one of the substances. The closure includes a stopper for closing a respective opening to one of the chambers. The closure further includes an actuator for removing each stopper from the respective opening so as to release each substance from each respective chamber.

The present invention is directed towards an apparatus for providing a nonlabor-intensive process for sealing an opening formed in the ground with a chemically-inflatable bag. The chemically-inflatable bag contains two or more chemical reactants, one of which is a liquid reactant that is initially stored in a liquid-containing device. The liquid-containing device has a removable cap, which upon removal or breakage of the cap permits the liquid reacting agent to contact and react with another reacting agent. The chemical reaction produces carbon dioxide, which expands the chemically-inflatable bag from a collapsed condition to an inflated condition. In the inflated condition, the chemically-inflatable bag fills and protects the integrity of the formed cavity.

The present invention is directed towards an apparatus for providing a nonlabor-intensive process for sealing an opening formed in the ground with a chemically-inflatable bag. The chemically-inflatable bag contains two or more chemical reactants, one of which is a liquid reactant that is initially stored in a liquid-containing device. The liquid-containing device has a removable cap, which upon removal or breakage of the cap permits the liquid reacting agent to contact and react with another reacting agent. The chemical reaction produces carbon dioxide, which expands the chemically-inflatable bag from a collapsed condition to an inflated condition. In the inflated condition, the chemically-inflatable bag fills and protects the integrity of the formed cavity.

In a seal device for a hydraulic circuit, in which an oil passage that supplies hydraulic oil to or discharges the hydraulic oil from a hydraulic actuator operated by hydraulic pressure is formed over at least two members that relatively move, and a seal member that seals a gap between the two members in a liquid-tight manner is disposed in an interior of a groove section that is formed in at least either one of the two members, a communication section that allows the groove section to communicate with any portion of the oil passage such that the hydraulic oil in the interior of the groove section moves along with supply of the hydraulic oil to or discharge of the hydraulic oil from the hydraulic actuator is formed.

An elastomeric blasting plug and method of using the same are described. The elastomeric blasting plug may include a plurality of stacked units that taper from a base to a stem. A fuse may extend through the elastomeric blasting plug and the elastomeric blasting plug may expand radially after detonating the fuse and explosive charge.

An elastomeric blasting plug and method of using the same are described. The elastomeric blasting plug may include a plurality of stacked units that taper from a base to a stem. A fuse may extend through the elastomeric blasting plug and the elastomeric blasting plug may expand radially after detonating the fuse and explosive charge.

A safety plug for use in a bore hole comprising a bore wall. The safety plug comprises a body having a leading end and a trailing end, and at least one flared portion. An anchoring element extends at least partially around an associated flared portion. Axially displacement of anchoring element relative to its associated flared portion causes the anchoring element to bear against the flared portion and transitions the anchoring element between an unexpanded condition and an expanded condition. A nose, comprising conical elements, extends longitudinally from the leading end of body. The nose is longitudinally compressible.