Pressure activated switch

A system, comprising:

• a tool configured to be lowered into a wellbore and comprising;
• a housing;
• an internal passage within the housing and configured to accept a fluid having a pressure;
• and
• a compartment coupled to the housing and fluidically coupled to the internal passage;
• a switch comprising:
• a body configured to be coupled to the compartment of the tool, the body comprising a first connector, wherein the first connector includes a first contact and a second contact;
• a piston assembly movably coupled to the body and comprising:
• a second connector configured to mate with the first connector based on:
• the first contact of the first connector mating with a first contact of the second connector, and
• the second contact of the first connector mating with a second contact of the second connector, wherein the first contact of the second connector is electrically connected to the second contact of the second connector;
• and
• a piston configured to be movably disposed within the compartment, wherein the piston assembly has a first position where the first and second connectors are separated and a second position where the first and second connectors are mated;
• and
• a spring disposed between the body and the piston assembly and configured to urge the piston assembly toward the first position;
• wherein introduction of a fluid at a pressure above a threshold into the internal passage of the tool forces the piston assembly to move to the second position.

A method of actuating a switch, comprising steps:

• coupling a switch to a tool, wherein the tool comprises a compartment and the switch comprises:
• a body configured to be coupled to the compartment of the tool, the body comprising a first connector, wherein the first connector includes a first contact and a second contact;
• and
• a piston assembly movably coupled to the body and comprising:
• a second connector configured to mate with the first connector based on:
• the first contact of the first connector mating with a first contact of the second connector, and
• the second contact of the first connector mating with a second contact of the second connector, wherein the first contact of the second connector is electrically connected to the second contact of the second connector, and
• a piston configured to be movably disposed within the compartment, wherein the piston assembly has a first position where the first and second connectors are separated and a second position where the first and second connectors are mated;
• and
• lowering the tool into a wellbore;
• and
• introducing a fluid into the compartment at a pressure higher than an activation threshold, whereupon the fluid applies a force to the piston assembly that moves the piston assembly to the second position.