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:
May. 14, 2013
Filed:
Aug. 13, 2010
Applicants:
Wolfgang Paul, Bad Schwartau, DE;
Dirk Heidemann, Schwerte, DE;
Maciej Barcikowski, Bochum, DE;
Inventors:
Assignee:
Ruhrpumpen GmbH, Witten, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 17/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
A drive apparatus for a drill stem of a de-coking system is disclosed. The apparatus includes a feeder as water supply to the drill stem. The drill stem is rotatably driven by a rotational drive which includes a motor and a first and second gear box. The second gear box has an output gear which is meshed with a large gear which is connected to an outer gear rim of the feeder. A skirt envelops the gear which is formed by an output gear and by the second motor driven gear box and the gear which is connected to the feeder completely. A lower side of the skirt is open.