Wirth Maschinen-und Bohrgerate-fabrik Gmbh

Wirth Maschinen-und Bohrgeraete Fabrik Gmbh

Hermann-Josef Von Wirth

Fritz Tibussek

A process and an apparatus for sinking drill holes, in particular exploration and extraction drill holes, with a drill pipe, which at its end facing the floor to be mined is provided with a guide point fixed in the longitudinal direction of the drill pipe and a drill head with at least one cutting element. The drill head can be moved in the longitudinal direction of the drill pipe between a top position, in which the guide point projects beyond the at least one cutting element, and a bottom position in which the at least one cutting element is positioned at the same height as the end of the guide point or projects beyond same in the operating direction. When the drill head is in the top position, the drill pipe is moved in the direction of the drill hole to be produced until the guide point by cooperating with the floor fixes it in position. Then the drill head is moved into its bottom position in order to produce the drill hole.

Method and device for driving bore-holes, especially in the sea bed, using a guide tip

Method of, and apparatus for, sinking bore holes, in particular exploratory and extraction bore holes, in the sea bed ( ). The material from the sea bed is loosened with the aid of a rotating drill head ( ) which is arranged at the bottom end of a drill string ( ) which is suitable for transmitting a torque. The top end of the drill string is mounted on a floating platform ( ), it being the case that the drill string ( ) comprises at least two telescopically interengaging drill-string parts ( ) which, during a vertical movement of the platform, induced for example by the sea swell, execute a movement relative to one another, with the result that the drill head (10) rests with an essentially constant force on the surface which is to be cleared away.

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Titz, Germany

Hermann-Josef Von Wirth