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:
Jul. 15, 2014
Filed:
Jan. 12, 2012
Applicants:
Harald Syse, Royenberg, NO;
Espen Alhaug, Stvanger, NO;
Inventors:
Harald Syse, Royenberg, NO;
Espen Alhaug, Stvanger, NO;
Assignee:
Reelwell, A.S., Royneberg, NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A dual drill pipe joint includes a pin end and a box end. An inner pipe is disposed within an internal bore of the joint of drill pipe. A retainer is disposed proximate each longitudinal end of the inner pipe. A retaining feature is formed in an interior of the joint of drill pipe proximate each longitudinal end. The features are configured to engage a respective one of the retainers so that the inner pipe is held in longitudinally fixed relation to the joint of drill pipe.