Patent ID: 8540021
Filing Date: 2013-09-24
Classification: E21B

Abstract:
1. A method for releasing a portion of a tool string downhole of a release assembly positioned in a wellbore, the method comprising: providing a surface controller; running the tool string into the wellbore, the tool string including a downhole controller, a plurality of downhole remote units, a release assembly operably associated with a first one of the downhole remote units and a downhole tool positioned downhole of the release assembly; sticking the tool string in the wellbore; sending an actuation command including an address of the first downhole remote unit from the surface controller to the downhole controller; relaying the actuation command from the downhole controller to the first downhole remote unit; sending an actuation signal from the first downhole remote unit to the release assembly; and actuating the release assembly to release the portion of the tool string downhole thereof including the downhole tool by electrically actuating a first release member to enable relative axial movement between a fishing receptacle and an outer housing of the release assembly then mechanically actuating a second release member to decouple the fishing receptacle from the outer housing.