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:
Jan. 20, 2004
Filed:
Oct. 26, 2001
Dewey Craig Compton, Richmond, TX (US);
Edwin R. Knerr, Houston, TX (US);
Kvaerner Oilfield Products, Inc., Houston, TX (US);
Abstract
An apparatus for use in a subsea well including a bore, wherein the apparatus has a tubing hanger body having an annulus therethrough, a ball valve in the annulus adapted for opening and closing the annulus, comprising a ball valve body within a valve chamber in the tubing hanger body which forms a continuation of the tubing hanger passageway at one end and is closed at its opposite end; a tubular valve housing for the ball valve; the ball valve body having a ball valve closure member substantially in the form of a spherical ball defining two annular valve seats concentric with the annulus for the ball valve; the spherical ball being longitudinally movable and rotatable extending transversely in alternating positions between spherical upstream and downstream valve seat preventing flow through the passage; and a remote source for hydraulically moving the spherical ball.