Patents by Inventor Eric John O'Neal

Eric John O'Neal 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).

  • Clean out sub
    Patent number: 9708872
    Abstract: A clean out sub for use in a drill string having a tool body with a cavity for passage of drilling fluid and annular fluid circulation ports extending through the tool body, a valve spool is positioned within the tool body cavity having a reduced diameter orifice, a compression spring is located within the tool body cavity adjacent the valve spool, wherein a drop in fluid pressure created by the orifice imparts a downhole force on the valve spool and at a predetermined force overcomes a set resistive force of the compression spring thereby moving the valve spool to open the annular fluid circulation ports.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: July 18, 2017
    Assignee: WWT North America Holdings, Inc
    Inventors: Eric John O'Neal, Rudolph Ernst Krueger, V, Andrew Alexander Trowbridge
  • CLEAN OUT SUB
    Publication number: 20140374157
    Abstract: A clean out sub for use in a drill string having a tool body with a cavity for passage of drilling fluid and annular fluid circulation ports extending through the tool body, a valve spool is positioned within the tool body cavity having a reduced diameter orifice, a compression spring is located within the tool body cavity adjacent the valve spool, wherein a drop in fluid pressure created by the orifice imparts a downhole force on the valve spool and at a predetermined force overcomes a set resistive force of the compression spring thereby moving the valve spool to open the annular fluid circulation ports.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 25, 2014
    Inventors: Eric John O'Neal, Rudolph Ernst Krueger, V, Andrew Alexander Trowbridge