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:
Aug. 16, 2016
Filed:
Aug. 25, 2011
Applicant:
Erik Aldén, Örebro, SE;
Inventor:
Erik Aldén, Örebro, SE;
Assignee:
Atlas Copco Rock Drills AB, Orebro, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 21/08 (2006.01); E21B 21/16 (2006.01);
U.S. Cl.
CPC ...
E21B 21/08 (2013.01); E21B 21/16 (2013.01);
Abstract
The present invention relates to a method for determining a variation of a flushing medium flow at a rock drilling apparatus, where a compressor () discharges a flow of pressurized gas, where said gas flow at least partially is used as flushing medium during drilling with a tool (), wherein, during drilling, said flushing medium is led to said tool () for flushing away drilling remnants. The method includes to determine a rate of a pressure variation of said flushing medium, and generating a signal when said determined rate exceeds a first value. The invention also relates to a system and a rock drilling apparatus.