Patents by Inventor Michael H. Du

Michael H. Du 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).

  • Submersible pumping system
    Patent number: 7469748
    Abstract: A technique is provided for pumping fluids in a subterranean wellbore. A submersible pumping system can be deployed in a wellbore for moving desired fluids within the wellbore. The pumping system energizes the desired fluid movement by reciprocating a working fluid between expandable members.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: December 30, 2008
    Assignee: Schlumberger Technology Corporation
    Inventors: Murat Ocalan, John F. Benton, Michael H. Du, Jeffrey Miller, Arukumar Arumugam, Peter Julstrom, John David Rowatt, Allan D. Ross, Steven Dornak, Arthur I. Watson, Brigitte Finkiewicz
  • System for Well Logging
    Publication number: 20070295502
    Abstract: A technique is provided to facilitate logging in a well environment. Downhole well related equipment is deployed in a wellbore with an internal, longitudinal passageway. A logging tool system is moved through the longitudinal passageway for performance of logging procedures within the wellbore below the well related equipment.
    Type: Application
    Filed: June 23, 2006
    Publication date: December 27, 2007
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Arthur I. Watson, Michael H. Du, Ramez Guindi, Jacques Orban
  • Well tool protection system and method
    Patent number: 7231986
    Abstract: The system including a well tool having a housing forming a protection fluid chamber in fluid communication with a discharge port, a protection fluid disposed within the protection fluid chamber, and a moveable mechanism in functional connection with the protection fluid chamber in a manner to expel a portion of the protection fluid when the moveable mechanism moves.
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: June 19, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Dennis M. Read, Jr., Michael H. Du
  • Protector for electrical submersible pumps
    Patent number: 7217107
    Abstract: A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positively pressurized bellows, a relatively balanced pressure bellows free of sliding seals, and a multi-orientable labyrinth. Each of these motor protectors also may have various moisture absorbents, filters, particle shedders and various conventional motor protector components.
    Type: Grant
    Filed: April 22, 2005
    Date of Patent: May 15, 2007
    Assignee: Schlumberger Technology Corporation
    Inventors: Michael H. Du, Lawrence C. Lee, Arunkumar Arumugam, Ashley C. Kishino
  • Protector for electrical submersible pumps
    Patent number: 6981853
    Abstract: A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positively pressurized bellows, a relatively balanced pressure bellows free of sliding seals, and a multi-orientable labyrinth. Each of these motor protectors also may have various moisture absorbents, filters, particle shedders and various conventional motor protector components.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: January 3, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Michael H. Du, Lawrence C. Lee, Arunkumar Arumugam, Ashley C. Kishino
  • Protector for electrical submersible pumps
    Publication number: 20040136849
    Abstract: A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positively pressurized bellows, a relatively balanced pressure bellows free of sliding seals, and a multi-orientable labyrinth. Each of these motor protectors also may have various moisture absorbents, filters, particle shedders and various conventional motor protector components.
    Type: Application
    Filed: December 4, 2003
    Publication date: July 15, 2004
    Inventors: Michael H. Du, Lawrence C. Lee, Arunkumar Arumugam, Ashley C. Kishino
  • Protector for electrical submersible pumps
    Patent number: 6688860
    Abstract: A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positively pressurized bellows, a relatively balanced pressure bellows free of sliding seals, and a multi-orientable labyrinth. Each of these motor protectors also may have various moisture absorbents, filters, particle shedders and various conventional motor protector components.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: February 10, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Michael H. Du, Lawrence C. Lee, Arunkumar Arumugam, Ashley C. Kishino
  • Protector for electrical submersible pumps
    Publication number: 20020192090
    Abstract: A system and method for protecting a motor for a submersible pumping system. A variety of motor protectors are provided for application in variable temperature environments and multiple wellbore orientations. The motor protectors may include one or more of a positively pressurized bellows, a relatively balanced pressure bellows free of sliding seals, and a multi-orientable labyrinth. Each of these motor protectors also may have various moisture absorbents, filters, particle shedders and various conventional motor protector components.
    Type: Application
    Filed: January 29, 2002
    Publication date: December 19, 2002
    Inventors: Michael H. Du, Lawrence C. Lee, Arunkumar Arumugam, Ashley C. Kishino