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:
Aug. 21, 2001
Filed:
Nov. 13, 1997
David Bone, Chepstow, GB;
Christopher Heywood, Dartmouth, GB;
Andrew Patrick Hollis, Goring on Thames, GB;
BG plc, Reading, GB;
Abstract
Apparatus for providing an offshore drilling operation in a sea, the apparatus comprising a drilling derrick support structure (,) having a base (,) to rest on the sea-floor (,) and a deck (,) to support a drilling derrick (,), the structure being in the form of a concrete block (,) having a hollow cavity to enable the block (,) to be floated to the site where drilling is to take place and being adapted to receive ballast into the cavity in such a way and in a sufficient quantity as to cause the block (,) to sink base-first and rest upon the sea-bed with the deck (,) clear of the surface of the sea, a drilling derrick (,) for mounting on the deck (,) of the block (,) and a tender assist barge (,) for transport to the site in down to 2 m of water to provide services, supplies and equipment to the drilling derrick (,).