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:
Dec. 28, 2004
Filed:
Mar. 29, 2004
Applicant:
Inventor:
Jon G. Gjedebo, Stavanger, NO;
Assignee:
National Oilwell Norway AS, Stavanger, NO;
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/909 ;
U.S. Cl.
CPC ...
E21B 1/909 ;
Abstract
An arrangement for transferring loads by means of one or more hydraulic cylinder-like actuators ( ) in order to establish and maintain tension in a riser ( ) of the type typically used in offshore petroleum production, where the riser ( ) constitutes a connection between the sea bed ( ) and an installation ( ) on or near the surface of the sea ( ), and where the required pressure difference between the pressure side(s) ( ) and the depressurised side(s) ( ) of the actuator(s) ( ) is constituted by a hydrostatic pressure difference.