Patent ID: 8701761

Claim:
A method of servicing a wellbore, comprising: arranging an assembly within a lubricator coupled to a tree, the assembly including at least one downhole tool and a signal receiver subassembly; communicating a signal to the signal receiver subassembly while the assembly is arranged within the lubricator, the signal being configured to activate a timer communicably coupled to the signal receiver subassembly, wherein communicating the signal to the signal receiver subassembly comprises: passing the signal receiver subassembly past one or magnets arranged about the lubricator or other wellbore surface component; and activating the timer using magnetic forces emanating from the one or more magnets; introducing the assembly into the wellbore and advancing the assembly until reaching a target depth; and transmitting a trigger signal with the signal receiver subassembly to the at least one downhole tool and thereby actuating the at least one downhole tool.