| 摘要 |
A method for driving a drive pipe into a subsea formation, the method being comprised of the following steps: suspending the drive pipe from a drill string; moving at least one mass in a direction having an upward component and within the drive pipe; accelerating at least one mass relative to the drive pipe, wherein the at least one mass is accelerated within the drive pipe; transferring energy from the accelerated at least one mass to the drive pipe; isolating the drill string from energy from the accelerated at least one mass; and removing a core of formation from within the drive pipe after the transferring. A system for driving a drive pipe into a subsea formation, the system having: a drill string suspendable from a marine vessel; a running tool attachable to the drill string, wherein a top of the drive pipe is connected to the running tool; at least one mass adapted to fit within the drive pipe; an accelerator of the at least one mass, wherein the accelerator is in mechanical communication with the running tool and the at least one mass; and a transferror of energy from the at least one mass to the drive pipe, wherein the transferror transfers energy after the at least one mass is accelerated by the accelerator.
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