| 摘要 |
A method of assessing the condition of a tubular member comprises driving an ultrasonic probe 22 to fire a short pulse ultrasonic beam at the outer surface of the tubular member and analysing the reflected signals from the tubular member to assess its condition. The tubular member is preferably a pipe, such as a flexible riser. The method may include identifying corrosion in the armour wires of a riser, and may also include identifying the front and back walls of the armour wires. The reflected signals may be analysed to identify an interface between areas in the annulus of the pipe which are flooded, and those which are not. The probe 22 is preferably mounted adjacent to the tube, and may be moved along and around it to perform a scanning operation. The probe may be mounted on a frame 11 which is mounted to or around the pipe, and can preferentially be driven along the pipe. Alternatively, the frame 11 can be mounted on a remotely operated vehicle (ROV). An apparatus 10 includes means for converting the reflected beam into image signals which can be analysed to assess the condition of a tubular member. |
