Determining the order of devices in a downhole string

• Main Authors: MARSH LABAN, GOLLA CHRISTOPHER
• Format: Patent
• Language: English
• Published: 30.06.2015
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A string of subs includes a controller sub. The controller sub includes a first end, a second end, a controller, a first controller bus coupled to the controller, the first controller bus exiting at the first end of the controller sub, and a second controller bus coupled to the controller, the second controller bus being separate from the first controller bus, the second controller bus exiting at the second end of the controller sub. The string of subs also includes a first measuring sub and a second measuring sub. A process, running on a computer, discovers that the first measuring sub is connected to the first controller bus, discovers that the second measuring sub is connected to the first controller bus, determines that the first measuring sub is physically closer to the controller sub than the second measuring sub, and use the fact that the first measuring sub is physically closer to the controller sub than the second measuring sub in controlling the operation of the string of subs.