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. 22, 2018
Filed:
Dec. 21, 2012
Applicant:
Imdex Global B.v., Amsterdam, Zuidoost, NL;
Inventors:
Dieter Goetze, Emmendingen, DE;
Steve Toghill, Au, DE;
Assignee:
ImDex Global B.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 47/02 (2006.01); E21B 47/022 (2012.01); E21B 47/09 (2012.01); G01C 19/02 (2006.01);
U.S. Cl.
CPC ...
E21B 47/02 (2013.01); E21B 47/022 (2013.01); E21B 47/09 (2013.01); G01C 19/02 (2013.01); E21B 47/02232 (2013.01);
Abstract
A navigation device for surveying and directing a borehole comprises: a first gyro including a first sensitive axis and a second sensitive axis; a second gyro including at least a third sensitive axis; and a driving unit configured to orient the second gyro in a first mode in a first position in which an earth acceleration dependent error on the second gyro is insignificant and to orient the second gyro in a second mode in a second position in which the third sensitive axis is perpendicular to the first sensitive axis and perpendicular to the second sensitive axis.