US 12,312,911 B2
Multi-cycle counter system
Viggo Brandsdal, Ytre Arna (NO); and Geir Aasheim, Ytre Arna (NO)
Assigned to NINE DOWNHOLE TECHNOLOGIES, LLC, Houston, TX (US)
Filed by NINE DOWNHOLE TECHNOLOGIES, LLC, Houston, TX (US)
Filed on Mar. 28, 2024, as Appl. No. 18/619,529.
Application 18/619,529 is a continuation of application No. 17/662,816, filed on May 10, 2022, granted, now 11,970,922.
Claims priority of provisional application 63/186,510, filed on May 10, 2021.
Prior Publication US 2024/0240537 A1, Jul. 18, 2024
Int. Cl. E21B 23/04 (2006.01); E21B 34/08 (2006.01); E21B 34/14 (2006.01)
CPC E21B 34/08 (2013.01) [E21B 23/0413 (2020.05); E21B 23/042 (2020.05); E21B 34/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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 a 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 the 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, wherein the flow restrictor is configured to delay an equalization of fluid pressure between the fluid source to the fluid reservoir and to remain in fluid communication with the fluid reservoir and fluid source before and after pressure has been equalized.