Patent specification for a submarine hammer drill unit designed to operate underwater, featuring a fluid-actuated rock drill and mud guard.
This document is a patent specification for a submarine hammer drill unit invented by Charles C. Hansen and assigned to Ingersoll-Rand Company. The invention describes a drilling system where a fluid-actuated rock drill of the hammer type is lowered into the water to perform drilling operations while submerged. The design aims to improve efficiency by reducing the length of drill steel required and simplifying the operation compared to traditional piston drills.
The invention is a submarine hammer drill unit that uses a fluid-actuated rock drill of the hammer type.
The shield is forced through loose material to protect the drill steel and the hole to be drilled.