The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 2002
Filed:
Aug. 06, 1999
Fritz Tibussek, Monchengladbach, DE;
Hermann-Josef Von Wirth, Titz, DE;
Wirth Maschinen-und Bohrgeratefabrik GmbH, Erkelenz, DE;
Abstract
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.