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:
Oct. 16, 2001
Filed:
Oct. 23, 2000
Arne Smedal, Stavanger, NO;
Hitec Systems AS, Forus, NO;
Abstract
A swivel device for a ship (,) equipped so as to serve as i.a. a production and/or a drilling ship by exploitation of submarine wells or reservoirs, respectively, containing oil and/or gas, where the ship (,) is formed with a vertically through-going shaft (,). Within the shaft (,), a turret (,) having a substantially vertical axis is rotatably mounted in relation to the hull and is included in said swivel device. Thus, when the turret (,) is moored to the seabed, the ship (,) may turn about said vertical axis, dependent on wind and/or sea currents. The swivel device comprises a first pipe (,) substantially concentrical with the turret (,) and with a smaller external diameter than the internal diameter of the turret (,), so that, between the outside of said first pipe (,) and the inner side of the turret (,), a vertically through-going annulus is formed for accommodating of several production risers (,). Said first pipe's (,) bore constitutes a vertically through-going passage for separate passage and accommodation of a drill pipe string. Said first pipe (,) is connected to the turret (,).