Patent ID: 6862099

Claim:
A system for measuring outer diameter of a tubular, the system comprising a pair of sensors diametrically opposed to each other and between which a tubular to be measured is movable, each sensor of the pair of sensors including a detector for contacting an outer surface of the tubular, each said detector movably mounted to mount apparatus, each said detector movable along and in contact with the outer surface of the tubular and axially movable in response to variation in outer diameter of the tubular, each detector including a beam reflective surface for reflecting a laser beam, a rotatable head rotatable around the tubular, the mount apparatus secured to the rotatable head, each detector movable with respect to the rotatable head, rotating apparatus connected to the rotatable head for rotating the rotatable head around the tubular as the tubular is moved through the rotatable head, a pair of laser apparatuses secured to the mount apparatus, one each of the pair of laser apparatuses associated with each of the sensors of the pair of sensors, each laser apparatus for directing a laser beam to a corresponding detector's beam reflective surface for receiving a reflected laser beam and for producing a signal indicative of distance between said beam reflective surface and the laser apparatus, transmitting apparatus for transmitting said signals to processing equipment for determining outer diameter of the tubular, and tubular movement apparatus for moving the tubular through the rotatable head between the pair of sensors.