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:
Jun. 12, 2001
Filed:
Mar. 31, 2000
Chris Dale Johnson, Houston, TX (US);
Varco Shaffer, Inc., Houston, TX (US);
Abstract
A ram actuating mechanism,for a blowout preventer,, the ram actuating mechanism,including a hydraulic booster for enhancing the ram closing force. The ram actuating mechanism,may be compatible for use with primary pistons,which include internal moving components, such as self locking pistons. The ram actuating mechanism,providing a hydraulic booster without increasing the diameter of the booster pistons above the diameter of the primary piston, such that BOP stack height need not be increased to accommodate a relatively large diameter hydraulic booster. The ram actuating mechanism,may utilize the same piston housing,as used by the primary piston, and the booster pistons,may act mechanically in series upon the primary piston,to increase axial ram closing force. The ram actuating mechanism,may be capable of retro-fitting existing ram actuating mechanisms.