E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/41
E21B 34/10 (2006.01) E21B 23/00 (2006.01)
Patent
CA 1267076
ABSTRACT OF THE DISCLOSURE 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.
526350
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
Methods and apparatus for selectively controlling fluid... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for selectively controlling fluid..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for selectively controlling fluid... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1248616