Conductor Casing / Pipe is a large diameter pipe 18" to 42" and is the first interface between surface and subsurface. It serves many purposes, such as prevent well collapse, protection against subsurface shallow gas pockets (accumulation), fluid circulation and general support for drilling a well.
Offshore, a conductor could be installed either by a drilling rig (as free flow) or using hammering equipment, to hammer the conductor into the soil. In certain projects, the conductor is used as a leg/foundation for a small offshore platform.
Hammers could be hydraulic or diesel and of various weight ratings. There are 4 major manufacturers of oilfield hammers worldwide, who do not provide the services directly. In addition, guide shoes for abrasive and/or hard formations, directional shoes, drive-pipe, whipstocks and other pipe handling equipment and cutters are required for hammer services to install conductors.
As a standard practice, a conductor drivability engineering study is conducted prior to any conductor installation. Coupled with an efficiency installation job, this allows installing a conductor with perfect structural integrity.