Fluid Pressure Actuator

A method for actuating a downhole tool, the method comprising:

• introducing a pressurized fluid into a pressure chamber of the downhole tool;
• utilizing the pressurized fluid to elastically compress a diaphragm into a chamber formed between the diaphragm and a first plate;
• elastically compressing the first plate into a chamber formed between the first plate and a second plate;
• and
• utilizing the diaphragm to urge a plunger into engagement with an actuator when the plates are elastically compressed.

A method for actuating a downhole tool, the method comprising:

• providing a fluid pressure actuator within a chamber that is formed within a working string, the fluid pressure actuator comprising:
• a diaphragm having a top surface and a bottom surface;
• a plunger coupled to the diaphragm and extending away from the bottom surface of the diaphragm in a first direction;
• and
• a bellow sensor that extends away from the bottom surface of the diaphragm in the first direction, the bellow sensor comprising:
• a first circular plate coupled to the diaphragm, the first plate comprising:
• an interior surface of the first plate that is concentrically disposed about an exterior surface of the plunger;
• an opposing exterior surface of the first plate;
• and
• a first circumferentially extending cavity extending from the exterior surface of the first plate towards the first interior surface of the first plate;
• accommodating a portion of the plunger within an opening formed in a floor of the chamber;
• allowing a pressurized fluid to enter the chamber;
• moving the plunger in the first direction due to the pressurized fluid applying a force against one or more surfaces of the fluid pressure actuator that are exposed to the pressurized fluid in the first direction;
• and
• depressing an actuator located below the floor of the chamber, using the plunger, to activate the subterranean system controlled by the actuator.