A pipe repair device for repairing a leak in a pipe of a pipeline, the pipe repair device comprising: a body defining a first end and a second end opposite the first end, and a middle section therebetween; a sensor attached to the body for detecting the leak in the pipe; a locomotion subsystem comprising a transport mechanism attached to the body for transporting the pipe repair device along the pipeline to a location of the leak, wherein the locomotion subsystem comprises a steering rod extending from the first end of the body, the steering rod being movable relative to the body of the pipe repair device and being configured to guide the pipe repair device in a first direction at an intersection in the pipeline, such that the steering rod is configured for being pointed in the first direction and, as the pipe repair device is driven forward, the steering rod is configured to engage an inner surface of a first pipe segment such that the pipe repair device will turn in the first direction; 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 and wherein the stent comprises a spring and a sealing layer defining a substantially cylindrical structure, the spring biasing the stent to the expanded orientation. a body defining a first end and a second end opposite the first end, and a middle section therebetween; a sensor attached to the body for detecting the leak in the pipe; a locomotion subsystem comprising a transport mechanism attached to the body for transporting the pipe repair device along the pipeline to a location of the leak, wherein the locomotion subsystem comprises a steering rod extending from the first end of the body, the steering rod being movable relative to the body of the pipe repair device and being configured to guide the pipe repair device in a first direction at an intersection in the pipeline, such that the steering rod is configured for being pointed in the first direction and, as the pipe repair device is driven forward, the steering rod is configured to engage an inner surface of a first pipe segment such that the pipe repair device will turn in the first direction; a sensor attached to the body for detecting the leak in the pipe; a locomotion subsystem comprising a transport mechanism attached to the body for transporting the pipe repair device along the pipeline to a location of the leak, wherein the locomotion subsystem comprises a steering rod extending from the first end of the body, the steering rod being movable relative to the body of the pipe repair device and being configured to guide the pipe repair device in a first direction at an intersection in the pipeline, such that the steering rod is configured for being pointed in the first direction and, as the pipe repair device is driven forward, the steering rod is configured to engage an inner surface of a first pipe segment such that the pipe repair device will turn in the first direction; 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 and wherein the stent comprises a spring and a sealing layer defining a substantially cylindrical structure, the spring biasing the stent to the expanded orientation.