Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
E21B21/011—Dust eliminating or dust removing while drilling
E21B21/012—Dust eliminating or dust removing while drilling using exhaust air from the drilling motor for blowing off the dust at the borehole entrance
Verwendung einer Vorrichtung zum Anklemmen des Bohrgestänges eines Bohrwerkzeugs für Bohrungen zur Erschließung von Erdöllagerstätten an eine Antriebseinrichtung für das Bohrwerkzeug