| 摘要 |
<p>A test tool assembly 10 for pressure testing a section of pipe 12 comprises an isolation plug module 14 for isolating an upstream pipe section 16 from a downstream pipe section 18 and a test plug module 20 which permits a pressure test to be carried out on the upstream pipe section 16. The assembly 10 is configured so that a force acting on a seal arrangement (88, fig. 3) of the test plug module 20 as a result of a test pressure applied in the pipe 12 is lower than a force required to maintain the seal between the seal arrangement (88, fig. 3) and the pipe 12. The seal arrangement (88, fig. 3) is engaged with the wall of the pipe 12 using a seal activation arrangement, and the lock arrangement (94, fig. 3) is engaged with the wall of the pipe 12 using a lock activation arrangement. A test pressure is applied in the pipe using an accumulator.</p> |
