Patents by Inventor Richard Felix Sharp

Richard Felix Sharp 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).

  • Using a rotating inner member to drive a tool in a hollow outer member
    Patent number: 7347283
    Abstract: A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole tool is an electric generator connected to a downhole electric device. In another preferred embodiment the downhole tool is a mechanical transmission that uses the rotational energy from the inner member to drive a non-electric tool, such as a downhole hammer. This invention will increase the consistency and efficiency of downhole energy production.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: March 25, 2008
    Assignee: The Charles Machine Works, Inc.
    Inventors: Richard Felix Sharp, Matthew L. Dock
  • Using a rotating inner member to drive a tool in a hollow outer member
    Patent number: 7025152
    Abstract: A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole tool is an electric generator connected to a downhole electric device. In another preferred embodiment the downhole tool is a mechanical transmission that uses the rotational energy from the inner member to drive a non-electric tool, such as a downhole hammer. This invention will increase the consistency and efficiency of downhole energy production.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: April 11, 2006
    Assignee: The Charles Machine Works, Inc.
    Inventors: Richard Felix Sharp, Matthew L. Dock
  • Rotary driven retrieval tool for horizontal directional drilling operations
    Patent number: 6848506
    Abstract: A rotating inner member is used to drive operation of a retrieval tool connected to a dual-member drill string. The retrieval tool preferably has a gripping assembly adapted to receive rotational energy from the inner member. In a preferred embodiment, an electric actuator assembly operates the gripping assembly of the retrieval tool. In another preferred embodiment, the gripping assembly of the retrieval tool is mechanically operated by a screw driven cam assembly. In yet another embodiment, the retrieval tool is adapted to grip both the inside and outside of the object to be retrieved.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: February 1, 2005
    Assignee: The Charles Machine Works, Inc.
    Inventors: Richard Felix Sharp, Matthew L. Dock, H. Stanley Mullins, John Allan Skinner
  • Rotary driven drilling hammer
    Patent number: 6761231
    Abstract: A percussive tool adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment the percussive tool has a hydraulic pump, driven by a drive member, to operate the hammer assembly. In another preferred embodiment the percussive tool has a rotary-driven cam assembly adapted to mechanically operate the hammer assembly. This invention provides increased control and efficiency for the use of percussive force in horizontal directional drilling operations.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: July 13, 2004
    Assignee: The Charles Machines Works, Inc.
    Inventors: Matthew L. Dock, Richard Felix Sharp, Floyd R. Gunsaulis
  • Using a rotating inner member to drive a tool in a hollow outer member
    Patent number: 6739413
    Abstract: A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole tool is an electric generator connected to a downhole electric device. In another preferred embodiment the downhole tool is a mechanical transmission that uses the rotational energy from the inner member to drive a non-electric tool, such as a downhole hammer. This invention will increase the consistency and efficiency of downhole energy production.
    Type: Grant
    Filed: January 15, 2002
    Date of Patent: May 25, 2004
    Assignee: The Charles Machine Works, Inc.
    Inventors: Richard Felix Sharp, Matthew L. Dock
  • Using a rotating inner member to drive a tool in a hollow outer member
    Publication number: 20030132034
    Abstract: A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole tool is an electric generator connected to a downhole electric device. In another preferred embodiment the downhole tool is a mechanical transmission that uses the rotational energy from the inner member to drive a non-electric tool, such as a downhole hammer. This invention will increase the consistency and efficiency of downhole energy production.
    Type: Application
    Filed: January 15, 2002
    Publication date: July 17, 2003
    Applicant: The Charles Machine Works, Inc.
    Inventors: Richard Felix Sharp, Matthew L. Dock