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:
Mar. 18, 1986
Filed:
Feb. 25, 1985
Richard J Ross, Houston, TX (US);
David J Speller, Houston, TX (US);
Baker Oil Tools, Inc., Orange, CA (US);
Abstract
A valving apparatus for use in controlling the fluid pressure in a subterranean well conduit and in the annulus surrounding the conduit is disclosed. The valving apparatus is of the shuttle type and is shiftable between a closed position and an open position allowing flow within the tubing by the application of fluid pressure in the tubing above the valve. Pressure equalization below the valve is provided when the valve is in the closed position thus permitting the apparatus to be used with well tools in which annulus and tubing pressure must be equalized. A plug selectively inserted within the valve apparatus prevents the flow of fluids through the conduit in one direction and permits the build up of said fluid pressure. An annular fluid bypass does permit flow around the plug when the valve is shifted to the open position. An annular elastomeric sealing mass cooperates with a relatively movable annular ridge to provide sealing action for the valving apparatus.