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. 16, 2014
Filed:
Mar. 04, 2009
Tom Swan, Parker, TX (US);
Tom Swan, Parker, TX (US);
Halliburton Energy Services, Inc., Houston, TX (US);
Abstract
A method of controlling flow between a flow passage of a tubular string and an annulus includes: constructing a valve having an opening for flow between the passage and annulus; permitting flow through the opening; then preventing flow through the opening in response to applying pressure to the valve; and then mechanically displacing a closure device, thereby allowing flow through the opening. Another method includes applying a pressure differential across a piston of a valve, thereby displacing a closure device; and then displacing the closure device relative to the piston, thereby allowing flow between the passage and the annulus. A valve includes an opening for flow between an interior and exterior of the valve, a closure device for permitting and preventing flow through the opening, and a piston which biases the closure device to displace, the closure device being mechanically displaceable relative to the piston.