Patents by Inventor Dave Ricketts

Dave Ricketts 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).

  • One-way valve for a side pocket mandrel of a gas lift system
    Patent number: 7228909
    Abstract: Embodiments include providing a gas lift system comprising production tubing disposed within a wellbore, the production tubing capable of allowing fluid flow in a first direction from outside the production tubing through a wall of the production tubing to inside the production tubing to introduce a gas into the bore of the production tubing, while preventing fluid flow in a second direction from inside the production tubing through the wall of the production tubing to outside the production tubing. In one aspect, fluid flow in the second direction is prevented by operation of at least two valve members disposed within a side pocket of a side pocket mandrel in the production tubing. At least one of the valve members is capable of preventing fluid flow in the second direction even when the other valve member is removed from the wellbore or is at least partially inoperative.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: June 12, 2007
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Ronald W. Schmidt, Zlatko Salihbegovic, Dave Ricketts, Jerry Robinson
  • One-way valve for a side pocket mandrel of a gas lift system
    Publication number: 20060137881
    Abstract: Embodiments include providing a gas lift system comprising production tubing disposed within a wellbore, the production tubing capable of allowing fluid flow in a first direction from outside the production tubing through a wall of the production tubing to inside the production tubing to introduce a gas into the bore of the production tubing, while preventing fluid flow in a second direction from inside the production tubing through the wall of the production tubing to outside the production tubing. In one aspect, fluid flow in the second direction is prevented by operation of at least two valve members disposed within a side pocket of a side pocket mandrel in the production tubing. At least one of the valve members is capable of preventing fluid flow in the second direction even when the other valve member is removed from the wellbore or is at least partially inoperative.
    Type: Application
    Filed: December 28, 2004
    Publication date: June 29, 2006
    Inventors: Ronald Schmidt, Zlatko Salihbegovic, Dave Ricketts, Jerry Robinson