Figure 4. Schematic diagram of water hammer drill-in casing system deployment. A. Initial
deployment. B. Spud hole and drill ahead. C. Disengage hydraulic hammer and circulate fluid. D.
Install free-fall reentry funnel. E. Retract bit and release casing running tool. F. Recover hammer
drill and leave a cased reentry hole on the seafloor.
To 179 Figure 5
To 179 Table of Contents