Patents by Inventor Kean Wee Cheah

Kean Wee Cheah 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).

  • Patent number: 11041496
    Abstract: A mixed-flow impeller for an electric submersible pump can include a lower end and an upper end; a hub that includes a through bore that defines an axis; blades that extend at least in part radially outward from the hub where each of the blades includes a leading edge and a trailing edge; an upper balance ring that includes a radially inward facing balance chamber surface and a radially outward facing diffuser clearance surface; and an upper guard ring disposed radially outwardly from the upper balance ring where the upper guard ring includes an axially facing diffuser clearance surface that is disposed axially between the trailing edges of the blades and the upper end.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: June 22, 2021
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Kean Wee Cheah, David Milton Eslinger
  • Patent number: 10451079
    Abstract: An electric submersible pump (ESP) can include a shaft; an electric motor configured to rotatably drive the shaft; a housing; a stack of diffusers disposed in the housing; and impellers operatively coupled to the shaft. Various other apparatuses, systems, methods, etc., are also disclosed.
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: October 22, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Lye Heng Chang, Jerome Ang Sze Jiunn, Kean Wee Cheah, David Milton Eslinger, Ruslan Alexandrovich Bobkov
  • Publication number: 20180195514
    Abstract: A mixed-flow impeller for an electric submersible pump can include a lower end and an upper end; a hub that includes a through bore that defines an axis; blades that extend at least in part radially outward from the hub where each of the blades includes a leading edge and a trailing edge; an upper balance ring that includes a radially inward facing balance chamber surface and a radially outward facing diffuser clearance surface; and an upper guard ring disposed radially outwardly from the upper balance ring where the upper guard ring includes an axially facing diffuser clearance surface that is disposed axially between the trailing edges of the blades and the upper end.
    Type: Application
    Filed: June 30, 2015
    Publication date: July 12, 2018
    Inventors: Kean Wee CHEAH, David Milton ESLINGER
  • Patent number: 9683571
    Abstract: A centrifugal pump stage with increased compressive load capacity is provided. In an implementation, a centrifugal pump stage includes a diffuser with outside wall capable of supporting increased axial forces. A mating surface of the outer wall can support axial forces generated by a stack of subsequent pump stages across the entire thickness of the outer wall. The diffuser can be a two-piece assembly including a load bearing module and a flow diffusing module. The load bearing module may be a cylinder of strong tubular alloy while the flow diffusing module can be separately cast in a manner that improves hydraulic efficiency. Various means for radially positioning the pump stages relieve the load bearing module from the task of aligning additional pump stages. A single rigid tube may also be used as the load bearing module for multiple pump stages. The tube may be made with a thin wall to increase pump volume.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: June 20, 2017
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Tony R. Morrison, David Milton Eslinger, Kean Wee Cheah, Lye Heng Chang, Raju Ekambaram, Narayanan Lakshmanan
  • Publication number: 20170167498
    Abstract: An electric submersible pump (ESP) can include a shaft; an electric motor configured to rotatably drive the shaft; a housing; a stack of diffusers disposed in the housing; and impellers operatively coupled to the shaft. Various other apparatuses, systems, methods, etc., are also disclosed.
    Type: Application
    Filed: February 11, 2015
    Publication date: June 15, 2017
    Inventors: Lye Heng Chang, Jerome Ang Sze Jiunn, Kean Wee Cheah, David Milton Eslinger, Ruslan Alexandrovich Bobkov
  • Publication number: 20140294575
    Abstract: A centrifugal pump stage with increased compressive load capacity is provided. In an implementation, a centrifugal pump stage includes a diffuser with outside wall capable of supporting increased axial forces. A mating surface of the outer wall can support axial forces generated by a stack of subsequent pump stages across the entire thickness of the outer wall. The diffuser can be a two-piece assembly including a load bearing module and a flow diffusing module. The load bearing module may be a cylinder of strong tubular alloy while the flow diffusing module can be separately cast in a manner that improves hydraulic efficiency. Various means for radially positioning the pump stages relieve the load bearing module from the task of aligning additional pump stages. A single rigid tube may also be used as the load bearing module for multiple pump stages. The tube may be made with a thin wall to increase pump volume.
    Type: Application
    Filed: February 3, 2014
    Publication date: October 2, 2014
    Applicant: Schlumberger Technology Corporation
    Inventors: Tony R. Morrison, David Milton Eslinger, Kean Wee Cheah, Lye Heng Chang, Raju Ekambaram, Narayanan Lakshmanan