Abstract: The present disclosed technology relates to a downhole tool activation device, and a method of using the device, where the valve is configured to open when the counter device has moved an activation distance in an activation direction, a piston engaged with the counter device, having a wellbore pressure from a fluid source applied to a first side, and a pressure in a fluid reservoir applied to the second side, the piston configured to move a step distance in a first direction when the wellbore pressure exceeds the pressure in the fluid reservoir, and configured to move a step distance in an opposite direction driven solely by a greater pressure in the fluid reservoir than the wellbore pressure, and a flow restrictor in fluid communication with the fluid reservoir and fluid source, configured to restrict the flow of fluid between the fluid source to the fluid reservoir.

Abstract: A barrier plug assembly for sealing a subterranean wellbore is located inside a tubing and can comprise a frangible barrier element stacked on a carrier ring, a locking sleeve located above the carrier ring and located in a closed fluid chamber, a valve located on the closed fluid chamber and in pressure communication with the tubing, a retaining device configured for locking the a carrier ring in place, a crushing element located a distance below the frangible barrier element and configured for crushing the frangible barrier element. The valve can be configured for allowing or preventing fluid communication in between the tubing and the fluid chamber.

Abstract: The present disclosed technology relates to a downhole tool activation device, and a method of using the device, where the valve is configured to open when the counter device has moved an activation distance in an activation direction, a piston engaged with the counter device, having a wellbore pressure from a fluid source applied to a first side, and a pressure in a fluid reservoir applied to the second side, the piston configured to move a step distance in a first direction when the wellbore pressure exceeds the pressure in the fluid reservoir, and configured to move a step distance in an opposite direction driven solely by a greater pressure in the fluid reservoir than the wellbore pressure, and a flow restrictor in fluid communication with the fluid reservoir and fluid source, configured to restrict the flow of fluid between the fluid source to the fluid reservoir.

Abstract: A plug assembly for opening a subterranean wellbore comprises a tubular housing and a first frangible element comprising an activation component. The first frangible element has a first orifice in an uphole side that extends at least partially through the first frangible element. The activation component initially seals the first orifice to prevent fluid communication from the uphole side of the first frangible element with the first orifice. After the activation component is activated, fluid communication is enabled from the uphole side of the first frangible element with the first orifice.

Abstract: A barrier plug assembly for sealing a subterranean wellbore arranged inside a tubing, the barrier plug assembly comprising: at least one frangible barrier element stacked on a carrier ring; a locking sleeve arranged above the carrier ring and located in a closed fluid chamber; a valve arranged on the closed fluid chamber and in pressure communication with the tubing, the valve configured or allowing or preventing pressure communication in between the tubing and the fluid chamber; a retaining device configured for locking the a carrier ring in place; a crushing element arranged a distance below the one frangible barrier element and configured for crushing the at least one frangible barrier element.

Abstract: A barrier plug assembly for sealing a subterranean wellbore arranged inside a tubing, the barrier plug assembly comprising: at least one frangible barrier element stacked on a carrier ring; a locking sleeve arranged above the carrier ring and located in a closed fluid chamber; a valve arranged on the closed fluid chamber and in pressure communication with the tubing, the valve configured or allowing or preventing pressure communication in between the tubing and the fluid chamber; a retaining device configured for locking the a carrier ring in place; a crushing element arranged a distance below the one frangible barrier element and configured for crushing the at least one frangible barrier element.

Abstract: A barrier plug assembly for sealing a subterranean wellbore arranged inside a tubing, the barrier plug assembly comprising: at least one frangible barrier element stacked on a carrier ring; a locking sleeve arranged above the carrier ring and located in a closed fluid chamber; a valve arranged on the closed fluid chamber and in pressure communication with the tubing, the valve configured or allowing or preventing pressure communication in between the tubing and the fluid chamber; a retaining device configured for locking the a carrier ring in place; a crushing element arranged a distance below the one frangible barrier element and configured for crushing the at least one frangible barrier element.

Abstract: A downhole valve has a housing with a longitudinal main passage and at least one valve port extending from the main passage and through the housing, a valve member is arranged in the main passage, the valve member arranged to cover the at least one valve port, wherein at least a part of the valve member is made of a degradable material which is reactive to water or a well fluid, and has a surface coating of a material which is non-reactive to water or the well fluid.

Abstract: A downhole valve has a housing with a longitudinal main passage and at least one valve port extending from the main passage and through the housing, a valve member is arranged in the main passage, the valve member arranged to cover the at least one valve port, wherein at least a part of the valve member is made of a degradable material which is reactive to water or a well fluid, and has a surface coating of a material which is non-reactive to water or the well fluid.