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:
Sep. 25, 2001
Filed:
Mar. 26, 1998
Applicant:
Inventor:
Bruce J. Watkins, Houston, TX (US);
Assignee:
Dril-Quip, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 3/404 ;
U.S. Cl.
CPC ...
E21B 3/404 ;
Abstract
Apparatus is disclosed for use in drilling and completing a subsea well of the type in which a blowout preventer stack positioned on a floating rig is connected to the well by a drilling riser, and wherein the flow of well fluid between the tubing/casing annulus and the upper end of the wellhead is controlled by valves means within passageway in a relatively thick walled upper portion of the housing above a relatively thin walled portion thereof in which a casing hanger is installed.