Patents by Inventor Michael Du
Michael 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).
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Publication number: 20260063820Abstract: An electromagnetic logging tool includes at least one electromagnetic receiving antenna deployed on a logging while drilling tool body. The receiving antenna is configured to receive a complex voltage signal and thereby make electromagnetic logging measurements. An electrically conductive tube is deployed in the tool body and within an inner diameter of the receiving antenna such that a longitudinal axis of the tube is coincident with a longitudinal axis of the tool body. An insulated electrical conductor is deployed in the tube and is configured to transmit electronic data and/or electrical power from one axial end of the tool body to an opposing axial end of the tool body.Type: ApplicationFiled: August 29, 2024Publication date: March 5, 2026Inventors: Michael Du, Anatoly Dementyev, Mark Frey, Rachel Belleville, Daniel Fernandez
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Publication number: 20070224056Abstract: A technique is provided to facilitate pumping of fluids in a well. A submersible pumping system utilizes a submersible motor to power a submersible pump. A motor protector works in cooperation with the submersible motor to protect motor fluid within the submersible motor and to reduce differential pressures between the internal motor fluid and the external well fluid. The motor protector incorporates a piston slidably sealed within an interior cavity of the motor protector for movement to reduce undue differential pressures.Type: ApplicationFiled: March 27, 2006Publication date: September 27, 2007Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Arthur Watson, Michael Du, John Rowatt
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Publication number: 20070207046Abstract: A system and method is used to protect a motor of a submersible pumping system. A variety of motor protector features are provided to facilitate operation of the motor protector and submersible pumping system in multiple wellbore environments and applications.Type: ApplicationFiled: April 10, 2007Publication date: September 6, 2007Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Michael Du, Lawrence Lee, Arunkumar Arumugam, Ashley Kishino
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Publication number: 20070151736Abstract: 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: ApplicationFiled: December 28, 2006Publication date: July 5, 2007Applicant: Schlumberger Technology CorporationInventors: Michael Du, Dennis Read
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Publication number: 20070074872Abstract: Apparatus and pumping systems including the apparatus are described, the apparatus including a protector body comprising a material allowing expansion and contraction of an internal fluid, the body serving as a barrier between fluids external of the body and the internal fluid. The body has first and second ends, at least one end adapted to connect the body to other components, the protector body further comprising structural features permitting facile cleanout and reuse of the protector body. Methods of use of the apparatus and systems are described, particularly in oilfield exploration, testing, and production. This abstract allows a searcher or other reader to quickly ascertain the subject matter of the disclosure. It will not be used to interpret or limit the scope or meaning of the claims.Type: ApplicationFiled: February 24, 2006Publication date: April 5, 2007Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Michael Du, John Rowatt, Cheryl DuVall, Michael Miller
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Publication number: 20060266526Abstract: 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: ApplicationFiled: April 13, 2006Publication date: November 30, 2006Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Murat Ocalan, John Benton, Michael Du, Jeffrey Miller, Arukumar Arumugam, Peter Julstrom, John Rowatt, Allan Ross, Steven Dornak, Arthur Watson, Brigitte Finkiewicz
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Publication number: 20060222529Abstract: A pumping system including a first section and a second section. The first section includes a first housing having an axial bore formed therethrough and a protruding member formed on one end of the first housing, and a first shaft arranged within the axial bore of the first housing. The second section include a second housing having an axial bore formed therethrough and a recess formed on one end of the second housing for receiving the protruding member of the first housing, and a second shaft arranged within the axial bore of the second housing. An apparatus for compensating oil volume change in a motor, including a compensator housing having an open end for connecting to the motor, and a closed end; and a flexible bladder arranged within the housing and connected to the open end of the housing.Type: ApplicationFiled: January 4, 2006Publication date: October 5, 2006Applicant: Schlumberger Technology CorporationInventors: Arthur Watson, Tyson Messick, Diego Narvaez, Michael Du, Patrick McCartney
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Publication number: 20050167096Abstract: 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: ApplicationFiled: April 22, 2005Publication date: August 4, 2005Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Michael Du, Lawrence Lee, Arunkumar Arumugam, Ashley Kishino
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Publication number: 20050087343Abstract: A system and method is provided for reducing the wear on a motor protector, particularly when used in an abrasive environment. The motor protector comprises an outer housing having an internal shaft. The motor protector further comprises a head section having an abrasives exclusion mechanism to reduce the amount of abrasive material contacting a specific component or components within the motor protector.Type: ApplicationFiled: March 5, 2004Publication date: April 28, 2005Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Michael Du, Arthur Watson, Arunkumar Arumugam
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Publication number: 20050056429Abstract: 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: ApplicationFiled: July 15, 2004Publication date: March 17, 2005Applicant: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Michael Du, Dennis Read