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. 20, 1990
Filed:
Jan. 25, 1989
Applicant:
Inventor:
Joseph R Roche, Kingwood, TX (US);
Assignee:
Hydril Company, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166359 ; 166367 ; 175-7 ; 405211 ;
Abstract
There are disclosed several embodiments of a marine riser having means for disrupting smooth flow of seawater along its length of the riser and thus damping vertical oscillation of the riser when its lower end is released from a subsea wellhead.
Quick Actions:
Roche, Joseph. (1990). Marine riser (U.S. Patent No. 4909327). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4909327
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