Patents Examined by Wiiliam P Neuder
  • Mechanism for activating a plurality of downhole devices
    Patent number: 8297367
    Abstract: A mechanism for selectively activating a plurality of downhole pathways including a) a valve having: i) a sleeve coupled for movement between an open and normally closed position; and ii) a valve magnet set mounted to the sleeve; and b) a dart for pumping in hole including a dart magnet set matched to the valve magnet set such that the dart couples to the valve when in close proximity and, in turn, the sleeve moves from the closed position to the open position.
    Type: Grant
    Filed: May 21, 2010
    Date of Patent: October 30, 2012
    Assignee: Schlumberger Technology Corporation
    Inventors: Kuo-Chiang Chen, Hitoshi Tashiro, Iain Cooper, Jahir Pabon, Murat Ocalan