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US 5,175,964 AGranted
Method and apparatus for removing flaws from internal pipe walls
OwnerRichard J. Girndtinventor
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OwnerRichard J. Girndtinventor
Estimating the term…
An improved technique is provided for removing flaws from internal pipe walls, and particularly the internal walls of tubes used in petroleum drilling and recovering operations. An ultrasonic detection unit positioned exterior of the oilfield tube is used to detect the defect. A powered grinding wheel is positioned on a support which may be axially moved to a desired location within the tubular passageway. A powered reciprocation unit including a crank arm and a connecting rod extending from the crank arm is used to reciprocate the grinding wheel with respect to the tubular member. The apparatus is provided with a base and a plurality of rollers for supporting and controlling the tubular member. A camera and a spray unit may be provided adjacent the grinding wheel. According to the method of the present invention, the grinding unit and the reciprocation unit are simultaneously activated to remove material adjacent the detected defect, thereby providing a highly reliable repair technique which minimizes operator fatigue.
Apparatus for removing a detected defect from an interior surface of an elongate metal member having an axial passageway therein defined at least in part by the interior surface, the apparatus comprising:
Apparatus for detecting and removing a defect from an interior surface of a metal tubular member having an axial passageway therein defined at least in part by the interior surface, the apparatus comprising:
A method of removing a detected defect from an interior surface of an elongate metal member having an axial passageway therein defined at least in part by the interior surface, the method comprising:
Dependencies are inferred from the claim text.