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:
Dec. 04, 2012
Filed:
Jan. 30, 2008
Applicant:
Bruno H. Walter, St. Albert, CA;
Inventor:
Bruno H. Walter, St. Albert, CA;
Assignee:
Lewal Drilling Ltd., St. Albert, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/00 (2006.01); E21B 1/14 (2006.01); E21B 4/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
An underground drilling method where drilling fluid pulsing down hole tool is combined with a multiple in series pistons down hole tool to provide vigorous vibrations in the drill string and deliver vibrating energy to the drill bit to increase penetration rates and reduce friction between the drill string and the hole. One example method and apparatus shown can operate a simple percussive down hole mud hammer.