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:
Apr. 02, 2024
Filed:
Jun. 18, 2020
Applicant:
Sandvik Mining and Construction Oy, Tampere, FI;
Inventor:
Olivier Bruandet, Tampere, FI;
Assignee:
Sandvik Mining and Construction Oy, Tampere, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 21/18 (2006.01); E21B 4/14 (2006.01);
U.S. Cl.
CPC ...
E21B 21/18 (2013.01); E21B 4/14 (2013.01);
Abstract
A down the hole drilling assembly having a drill tube adapter, an elongate casing, a fluid powered piston, a top working chamber, a bottom working chamber, a top sub and an exhaust system, wherein the exhaust system is moveable with respect to the drill string. The top sub includes an exhaust valve arranged for opening and closing the connection between the at least one exhaust passage and the at least one exhaust port.