Patent ID: 11970922
Assignee: NINE DOWNHOLE TECHNOLOGIES, LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 18:
19. A downhole tool activation device, comprising:
a valve disposed between a pressurized fluid and an activation port,
a counter device connected to the valve, wherein 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,
wherein the valve is a pin valve, and wherein a pathway is selectively blocked by a pin such that when the pin is removed from the pin valve, the pressurized fluid can pass through the pin valve to the activation port.