Inspecting coiled tubing for well operations

摘要

A coiled tubing injection unit for injecting a continuous length of coiled steel tubing into a wellbore for performing well operations includes an x-ray inspection apparatus arranged to continuously monitor the wall section of the tubing as it is inserted into or withdrawn from the well to detect structural defects in the tubing. An x-ray source and detector unit are mounted in a housing which is supported for rotation about the longitudinal axis of the tubing for projecting an x-ray image through suitable processing and display apparatus. The x-ray detection unit may be mounted on a level wind mechanism of the coiled tubing storgage spool or at another point between the storage spool and the wellhead into which the tubing is being injected.