Patent ID: 8899322
Filing Date: 2014-12-02
Classification: E21B

Abstract:
1. A method for activating a tool at a selected location in a wellbore drilled in a subterranean formation, comprising: measuring a parameter of interest using a formation evaluation tool that investigates the formation surrounding the wellbore, wherein the measured parameter of interest characterizes the selected location in the drilled wellbore; programming a memory module of a processor with a database having pre-existing data relating to the parameter of interest; conveying a sensor and the processor to the selected location along the drilled wellbore, the sensor configured to measure a parameter of interest relating to the pre-existing data by investigating the formation surrounding the wellbore; monitoring a measurement output of the sensor using the processor in the wellbore while the sensor is being conveyed along the wellbore; determining whether the location in the drilled wellbore has been reached by using the processor in the wellbore to correlate the measurement output of the sensor with the pre-existing data in the database; and transmitting a signal to a wellbore tool using the processor in the wellbore if the processor determines that the location has been reached.