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:
Mar. 16, 2004
Filed:
Aug. 28, 2002
Applicant:
Inventors:
Peter Nicolaas Looijen, Leidschendam, NL;
Herman Maria Zuidberg, Rijnsburg, NL;
Assignee:
Fugro Engineers B.V., Leidschendam, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 7/22 ; E21B 4/900 ; E21B 4/00 ;
U.S. Cl.
CPC ...
E21B 7/22 ; E21B 4/900 ; E21B 4/00 ;
Abstract
The invention relates to a downhole rotary coring device placeable in a drill string and comprising a head section, a motor, and a core barrel having an outer motor comprising a rotor connected to the outer barrel and a stator to the head section, whereby the rotor and the stator are movable with respect to each other in the longitudinal direction of the drill string.