Patent ID: 8950480
Filing Date: 2015-02-10
Classification: E21B

Abstract:
1. An apparatus comprising: a depth determination device in sliding communication with a well casing confined by a wellbore positioned at a surface depth, the depth determination device having a module attachment portion configured for direct attachment and detachment of a perforation device to the depth determination device; an electronic location sensing system housed in the depth determination device and communicating with a processor secured within the depth determination device to exclusively interact with features of the well casing to electronically determine a location of the depth determination device from the surface depth while the depth determination device is physically connected with the surface depth via at most a fluidic material, the electronically determined location of the depth determination device is sent to the processor and is available at the surface depth only upon retrieval of the depth determination device from the well casing; a communication port provided by the module attachment portion facilitating communication of operational commands from the processor to the perforation device in response to the perforation device being attached to the module attachment portion; and a perforation hole blocking assembly affixed to a well plug, the well plug secured to a module attachment portion of the depth determination device.