Patents by Inventor Robert D. Harper

Robert D. Harper 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).

  • Systems and methods for conveying a non-dry frac proppant
    Patent number: 11643287
    Abstract: Systems and methods for conveying non-dry frac proppant are described herein. The system generally includes at least one hopper having at least one moisture sensor, a slide gate that is fluidly connected to the at least one hopper, a conveyor assembly having at least one conveyor belt configured to convey the non-dry frac proppant from the at least one hopper to a blender, and at least one load sensor, and a control device configured to regulate a discharge rate of the non-dry frac proppant and a load rate of the non-dry frac proppant. The method generally includes providing the system at a well site to convey a non-dry frac proppant from a source point the at least one hopper, the conveyor assembly at a discharge rate determined by the control device, and the blender at a load rate determined by the control device.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: May 9, 2023
    Assignee: Walker-Dawson Interests, Inc.
    Inventors: Richard F. Dawson, William J. Walker, Robert D. Harper
  • Systems and Methods for Conveying a Non-Dry Frac Proppant
    Publication number: 20190144216
    Abstract: Systems and methods for conveying non-dry frac proppant are described herein. The system generally includes at least one hopper having at least one moisture sensor, a slide gate that is fluidly connected to the at least one hopper, a conveyor assembly having at least one conveyor belt configured to convey the non-dry frac proppant from the at least one hopper to a blender, and at least one load sensor, and a control device configured to regulate a discharge rate of the non-dry frac proppant and a load rate of the non-dry frac proppant. The method generally includes providing the system at a well site to convey a non-dry frac proppant from a source point the at least one hopper, the conveyor assembly at a discharge rate determined by the control device, and the blender at a load rate determined by the control device.
    Type: Application
    Filed: November 14, 2018
    Publication date: May 16, 2019
    Inventors: Richard F. Dawson, William J. Walker, Robert D. Harper