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:
Jul. 15, 1997
Filed:
Feb. 09, 1996
Charles D Morrill, Humble, TX (US);
Hydril Company, Houston, TX (US);
Abstract
A lightweight blowout preventer having a low profile is disclosed. Each of the rams have a sealing ring to be positioned thereabout to seal leaks from occurring between its bonnet and the ram body, thereby permitting the use of only about four connecting bolts for each side of the bonnet to the body and torqued for ordinary holding. A hinge plate is provided to allow selection of the side of the body for two associated bonnets. The hinge plate also is a manifold for the passageways for the hydraulic fluid to the fluid hinges. The hinges each includes a telescopic balancing sub with only one side spring for applying balanced pressure with the applied closing or opening hydraulic fluid to the hinge regardless of whether opening or closing hydraulic pressure is applied. The hydraulic passageways in the bonnets are located between the guideway extensions and the outside surfaces of the bonnets. The hinge plate and the bonnets can be inverted so that they can be mounted on either of two sides of the body.