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:
Oct. 05, 1982
Filed:
Feb. 05, 1980
Ernest P Fisher, Jr, Carrollton, TX (US);
Otis Engineering Corporation, Dallas, TX (US);
Abstract
A standing valve for controlling fluid flow through a well flow conductor. The standing valve allows formation fluids to enter the flow conductor downhole and to flow in one directin to the well surface. The standing valve functions as a check valve to prevent fluids injected into the flow conductor at the well surface from flowing out the other end of the well flow conductor. The standing valve is operated by changes in the velocity of fluids flowing through the valve. When the pressure of fluid injected into the flow conductor from the well surface exceeds a preselected value, an alternative flow path is opened within the standing valve to allow the injected fluid to flow in the other direction through the valve.