Methods and apparatus for selectively controlling fluid communic

Details Methods and apparatus for selectively controlling fluid communic Methods and apparatus for selectively controlling fluid communic

1985-12-30

1988-01-12

Suchfield, George A.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166319, 166330, E21B 3408

Patent

active

047184949

ABSTRACT:
In the representative embodiments of the new and improved methods and apparatus disclosed herein, a full-bore reversing and circulating valve is cooperatively arranged to be tandemly coupled in a typical string of drillstem testing tools including a pressure-actuated test valve. Pressure-actuated valve means are arranged within the housing of the new and improved apparatus of the present invention and adapted for movement therein in an extended span of travel between spaced upper and lower port-opening positions in response to changes in the direction of the pressure differential acting on the valve means. Indexing means are provided which include a sleeve member rotatably arranged on the valve means and ratchet-and-pawl means cooperatively arranged for incrementally advancing the sleeve along multiple angular positions around the valve means in response to the longitudinal movements of the valve means. Stop means are also provided on the valve means and sleeve for blocking the movement of the valve means to its port-opening positions until the sleeve has been advanced to a predetermined angular position in relation to the valve means.

REFERENCES:
patent: Re29638 (1978-05-01), Nutter
patent: 3442328 (1969-05-01), Nutter
patent: 3446280 (1969-05-01), Nutter
patent: 3969937 (1976-07-01), Banington et al.
patent: 3986554 (1976-10-01), Nutter
patent: 4403659 (1983-09-01), Upchufel
patent: 4452313 (1984-06-01), McMahan
patent: 4573536 (1986-03-01), Lawrence

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