1
Michael Hui Du, Arthur I Watson, Arunkumar Arumugam: Motor protector. Schlumberger Technology Corporation, Van Someren PC, Bryan P Galloway, Jaime A Castano, February 27, 2007: US07182584 (5 worldwide citation)

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 redu ...


2
Michael Hui Du, Dennis M Read Jr: Well tool protection system and method. Schlumberger Technology Corporation, Winstead PC, Daryl R Wright, Bryan P Galloway, July 29, 2008: US07404446 (2 worldwide citation)

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 ...


3
David Wei Wang, Michael Hui Du, Gary L Rytlewski, David Verzwyvelt: Downhole wet mate connection. Schlumberger Technology Corporation, David J Groesbeck, Brandon S Clark, June 17, 2014: US08752635 (1 worldwide citation)

A technique is provided that utilizes one or both of a control line actuation mechanism and a connector protection mechanism for use in a wellbore environment. Upon landing a lower well assembly and an upper well assembly at a desired wellbore location, control line connectors are engaged. The contr ...


4
Michael Hui Du, Arthur I Watson, David Rowatt, Chad Bremner, Arunkumar Arumugam, David Garrett, Christopher Featherby, Ramez Guindi: Pump motor protector with redundant shaft seal. Schlumberger Technology Corporation, Michael Stonebrook, August 19, 2014: US08807966 (1 worldwide citation)

An electric submersible pump device having a motor part, a pump part, and a protector part. The protector part includes redundant shaft seal parts.


5
Arthur I Watson, Michael Hui Du: Submersible electric motor terminated for auxiliary tools. Schlumberger Technology Corporation, Kevin Brayton McGoff, James L Kurka, September 29, 2009: US07595573 (1 worldwide citation)

A submersible electric motor in a submersible pump system is provided that facilitates connecting auxiliary tools with the motor and disconnecting auxiliary tools from the motor without draining the fluid from the motor. The motor includes electrical terminals for connecting the auxiliary tool with ...


6
Ke Ken Li, Fei Song, Rakesh Singh, Michael Hui Du, Anthony L Collins, Keith Moriarty: Rotary shouldered connections and thread design. SCHLUMBERGER TECHNOLOGY CORPORATION, December 4, 2018: US10145496

A thread structure in accordance to one or more embodiments includes a thread extending helically along the cylindrical member in spaced thread turns, the thread having a crest extending between a first flank and a second flank and a root extending between the thread turns, the root having a curvatu ...


7
Rakesh Singh, Ke Ken Li, Michael Hui Du, Fei Song, Stephen Ray Stafford, Anthony Louis William Collins, Keith Moriarty, Doyle Brinegar: Cold rolling devices and cold rolled rotary shouldered connection threads. SCHLUMBERGER TECHNOLOGY CORPORATION, December 25, 2018: US10160033

A method of cold rolling a thread on a tubular support member of a rotary shouldered thread connection includes obtaining an original root depth of a thread root, cold rolling the thread until a minimum increased root depth tolerance is achieved. The thread may be cold rolled with a wheel tip having ...


8
Michael Hui Du, Kevin Beveridge: Orientable eccentric downhole assembly. Schlumberger Technology Corporation, David J Groesbeck, Brandon S Clark, October 21, 2014: US08863832

An assembly employing multiple eccentric devices about a mandrel. The assembly is configured such that at least one of the eccentric devices is adjustably orientable relative another. Thus, for example, where the devices are packers disposed about completions tubing, the adjustable orientation may b ...


9
Michael Hui Du, Dennis M Read: Well tool protection system and method. Schlumberger Technology Corporation, Schlumberger Reservoir Completions, March 17, 2005: US20050056429-A1

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 ...


10
Michael Hui Du, Dennis M Read: Well tool protection system and method. Schlumberger Technology Corporation, Schlumberger Reservoir Completions, July 5, 2007: US20070151736-A1

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 ...