Patents by Inventor Priyesh Ranjan

Priyesh Ranjan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20090151790
    Abstract: An electromagnetic valving system includes a manifold having one or more flow passages therein; a sleeve disposed relative to the manifold so that movement of the sleeve inhibits or allows fluid flow relative to the manifold; and an electromagnet positioned relative to the sleeve such that a magnetic field generated by the at least one electromagnet produces a motive force in the sleeve and method.
    Type: Application
    Filed: November 14, 2008
    Publication date: June 18, 2009
    Inventors: Priyesh Ranjan, Don A. Hopmann, Luis E. Mendez, Carl W. Stoesz
  • Publication number: 20090128141
    Abstract: The position of a movable downhole component such as a sleeve in a choke valve is monitored and determined using an array of sensors, preferably Hall Effect sensors that measure the strength of a magnetic field from a magnet that travels with the sleeve. The sensors measure the field strength and output a voltage related to the strength of the field that is detected. A plurality of sensors, with readings, transmits signals to a microprocessor to compute the magnet position directly. The sensors are in the tool body and are not mechanically coupled to the sleeve. The longitudinal position of the sleeve is directly computed using less than all available sensors to facilitate the speed of transmission of data and computation of actual position using known mathematical techniques.
    Type: Application
    Filed: November 4, 2008
    Publication date: May 21, 2009
    Inventors: Don A. Hopmann, Daniel M. Cousin, Levon H. Yeriazarian, Juan P. Franco, Ahmed J. Jasser, Priyesh Ranjan
  • Publication number: 20090101354
    Abstract: An apparatus for controlling fluid flow in a wellbore includes a reactive element that reacts when exposed to a fluid and a flow control device configured to control a flow of the fluid. The flow control device may be actuated by a reaction of the reactive element to the fluid. In embodiments, the reactive element reacts by exhibiting a change in a material property. The reaction of the reactive element may be reversible. In embodiments, the reactive element may be a shape memory polymer. The flow control device may include an actuating element operably coupled to the reactive element. The reaction of the reactive element to a given fluid releases the actuating element to actuate the flow control device.
    Type: Application
    Filed: October 19, 2007
    Publication date: April 23, 2009
    Inventors: Kevin C. Holmes, Priyesh Ranjan, Steven R. Hayter, Stephen L. Crow
  • Publication number: 20090071654
    Abstract: A flapper type downhole valve is opened by flow against the flapper. The flapper and the housing contain magnets that hold the flapper open after it has been opened by flow to keep the flapper from chattering from the flow going past it. The strength of the force is not sufficient to hold the flapper open against a torsion spring on a pivot pin, when there is no flow through the valve. The valve can still be held in the locked open position with no flow through the housing by pressurizing the surrounding annulus to position another magnet to increase the holding force to a level greater than the force of the torsion spring. The additional magnet is spring biased so that upon removal of annulus pressure it shifts to allow the flapper to close. Alternative designs with and without a flow tube are possible. Fixed or movable restrictions can be associated with the flow tube to create a force to shift it to open a flapper with flow into the well.
    Type: Application
    Filed: September 17, 2007
    Publication date: March 19, 2009
    Inventors: Edward J. O'Malley, Priyesh Ranjan, Douglas J. Murray