A pipe repair device for repairing a leak in a pipe of a pipeline , the pipe repair device comprising: a body ; a leak detection subsystem, which is configured to function to identify the presence of the leak at a leak region and the position of the leak region requiring repair relative to the pipe repair device , such as to enable the pipe repair device to suitably position itself relative to the leak region for a repair, wherein the leak detection subsystem comprises at least one sensor attached to the body for detecting the leak in the pipe ; wherein the at least one sensor comprises at least one acoustic microphone configured for aurally identifying the leak region , wherein the at least one acoustic microphone comprises at least one hydrophone configured to identify an axial position and an azimuthal position of the leak region based on triangulation of hydrophone-derived audio signatures corresponding to leakage out of the pipeline ; a transport mechanism attached to the body for transporting the pipe repair device along the pipe to the leak region ; and a repair mechanism comprising a repair material for repairing the leak, wherein the repair mechanism comprises a stent , the stent reconfigurable between a compressed orientation and an expanded orientation, wherein the stent is expandable to engage a seal of the stent with the leak region for repairing the leak . a body ; a leak detection subsystem, which is configured to function to identify the presence of the leak at a leak region and the position of the leak region requiring repair relative to the pipe repair device , such as to enable the pipe repair device to suitably position itself relative to the leak region for a repair, wherein the leak detection subsystem comprises at least one sensor attached to the body for detecting the leak in the pipe ; wherein the at least one sensor comprises at least one acoustic microphone configured for aurally identifying the leak region , wherein the at least one acoustic microphone comprises at least one hydrophone configured to identify an axial position and an azimuthal position of the leak region based on triangulation of hydrophone-derived audio signatures corresponding to leakage out of the pipeline ; wherein the leak detection subsystem comprises at least one sensor attached to the body for detecting the leak in the pipe ; wherein the at least one sensor comprises at least one acoustic microphone configured for aurally identifying the leak region , wherein the at least one acoustic microphone comprises at least one hydrophone configured to identify an axial position and an azimuthal position of the leak region based on triangulation of hydrophone-derived audio signatures corresponding to leakage out of the pipeline ; a transport mechanism attached to the body for transporting the pipe repair device along the pipe to the leak region ; and a repair mechanism comprising a repair material for repairing the leak, wherein the repair mechanism comprises a stent , the stent reconfigurable between a compressed orientation and an expanded orientation, wherein the stent is expandable to engage a seal of the stent with the leak region for repairing the leak . <EOS>