Patent ID: 7392855

Claim:
A drive system for driving and/or extracting an elongate member, comprising: a support structure; a piston drive assembly comprising a piston member, where the piston member engages the elongate member; a hydraulic system operatively connected to the piston drive assembly, where the hydraulic system is capable of applying a drive force to the piston member, where the hydraulic system comprises a piston housing defining a housing chamber, the piston member further comprises a piston flange that divides the housing chamber into first and second portions, and the hydraulic system is operatively connected to the first and second portions of the housing chamber; a vibration drive assembly capable of generating a vibratory force, where the vibration drive assembly is operatively connected to the piston drive assembly; a first suppresser system operatively connected between the support structure and the vibration drive assembly, where the suppressor system resiliently opposes transfer of vibratory forces from the vibration drive assembly to the support structure; a guide system for guiding the elongate member along the drive axis; and a second suppresser system operatively connected between the support structure and the guide system, where the suppressor system resiliently opposes transfer of vibratory forces from the guide system to the support structure; wherein the drive system operates in a first mode in which the drive force and the vibratory force are applied to the piston member along a drive axis, and a second mode in which the drive force is applied to the piston member along the drive axis.