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:
Dec. 11, 2001
Filed:
Nov. 15, 2000
Ronald E. Pringle, Houston, TX (US);
Clay W. Milligan, Jr., Missouri City, TX (US);
Dennis M. Read, Manvel, TX (US);
Schlumberger Technology Corp., Sugar Land, TX (US);
Abstract
The invention is a downhole valve that includes a body, a flow tube assembly that includes an upper tube member and a lower tube member, and a flapper valve. The flapper valve is pivotally attached to the body and is positioned between the upper tube member and the lower tube member when the flapper valve is in a closed position that blocks fluid flow in an internal bore of the body. The flapper valve is moved from the closed position to an open position in response to an upward movement of the upper tube member and the lower tube member. When the flapper valve pivots to the open position, the lower tube member moves adjacent to and forms a seal with the upper tube member, forming an unobstructed internal bore.