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:
Oct. 18, 2016
Filed:
Sep. 19, 2011
Applicant:
Ivo Henriksson, Grangärde, SE;
Inventor:
Ivo Henriksson, Grangärde, SE;
Assignee:
SPC TECHNOLOGY AB, Stockholm, SE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 44/00 (2006.01);
U.S. Cl.
CPC ...
E21B 44/00 (2013.01);
Abstract
A method and device for monitoring down-the-hole percussion drilling. A down-the-hole hammer is supplied with percussion and flushing fluid flow. The down-the-hole hammer is subjected to rotational force and to feed force. Percussion frequency or a related frequency of the down-the-hole hammer is sensed. A representation of a spread thereof is created so as to produce a response to an adjustment of at least one drilling parameter as a change of width of the spread.