| 摘要 |
Apparatus (100) for performing a cutting operation on an inner wall of a pipeline (101) from within the pipeline (101), the apparatus (100) being propellable longitudinally along and within the pipeline (101), wherein the apparatus (101) comprises, e.g. in a dedicated drill module (130) thereof:: cutting means (440) for performing the cutting operation on the pipeline (101) from there within, drive means (410a, 410b) for driving the cutting means (440) so as to perform the cutting operation when in a cutting relationship with the pipeline inner wall to be cut, and displacement means (460a, 460b; 462a, 462b; 468a, 468b) for advancing or retracting the cutting means (440) into or from the said cutting relationship with the pipeline inner wall. |
