HalcyonDaze
Contributor
A conical shape charge that could penetrate the pipeline would not require so much explosives that could not be handled on that size vessel by a pair of technical divers.
As a former EOD officer, I once set off a 50 pound shaped charge and the ground penetration from the explosive jet was impressive.
The issue is that the Nord Stream 1 lines weren't just "punctured" - if I'm interpreting the reports right, there's almost a 250-meter segment of the northern Nord Stream 1 line that was blown to bits and it looks like about 100 meters of the southern line may have been compromised. What's interesting is the images we've seen of the one ruptured Nord Steam 2 line seem to show a clean break at a weld joint; this was the rupture that occurred 17 hours before the Nord Stream 1 blasts.
Oliver Alexander came up with an interesting hypothesis; while I don't entirely buy it, there are some elements that could make sense. The one Nord Stream 2 rupture was right about where the original pipe-laying contractor halted construction due to US sanctions on December 21, 2019 and a Russian-flagged vessel resumed construction in late April 2021. The Russian work was reportedly beset by slow progress and the need to redo work.

Is the Akademik Cherskiy to Blame for the Southern Nord Stream 2 Rupture?
A look at the evidence for the hypothesis that the southern Nord Stream 2 rupture was an accidental catalyst that forcibly accelerated a plan to destroy the Nord Stream pipeline.

What I have a hard time swallowing is the level of coincidence for an accidental rupture in Nord Stream 2 at the same time as Nord Stream 1 is being sabotaged (although if Nord Stream 2 was being pigged for potential use that might explain it), and how the explosions were precisely 17 hours apart.