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. 09, 1996
Filed:
Sep. 30, 1994
Kevin R Manke, Flower Mound, TX (US);
Curtis Wendler, Carrollton, TX (US);
Halliburton Company, Houston, TX (US);
Abstract
An annulus pressure responsive tool of the type which contains lateral circulation ports and a ball valve, each operable between open and closed positions to configure the tool into different modes of operation. These modes include a well test position in which the ball valve is open and the circulation ports are closed, a blank position in which the ball valve and circulation ports are both closed, and a circulating position in which the ball valve is closed and the circulating ports are open. Through manipulation of annulus pressure, the tool mode can be changed during the annulus pressure release to move out of the well test position and into the blank and circulating positions. An operating mandrel assembly is slidably disposed within the exterior housing of the tool and its movement dictates the positions of both the circulation ports and the ball valve. The operating mandrel is moveable by means of an annulus pressure conducting channel which is capable of receiving:, storing and releasing annulus pressure increases. A ratchet assembly associates the operating mandrel assembly and housing and functions as an overrideable position controller to dictate response of the operating mandrel assembly to annulus pressure changes.