Did the person on the scene say there was absolutely no possibility of tampering?
What about human error? Or was it totally just caused by the pressure?
The scheduled test had just been done and approved by the toughest inspection process in any industry including the nuclear. The well was being reopened and the gass blast came as an over pressure sudden surge. This was a freak accident, not sabotage. This sort of accident is why the process is inherently dangerous dealing with such pressures as 40,000 pounds per square inch!