Dezhi Zheng

US Patent:

20180306199, Oct 25, 2018

Filed:

May 29, 2015

Appl. No.:

15/569903

Inventors:

- Houston TX, US
Dezhi ZHENG - Spring TX, US
Jiabiao RUAN - Houston TX, US
Marvin BATRES - Katy TX, US

Assignee:

HALLIBURTON ENERGY SERVICES INC. - Houston TX

International Classification:

F04D 29/16
F04D 13/10
F04D 29/44
F04D 29/02
E21B 43/12

Abstract:

An electric submersible pump having a housing with side walls and at least one stackable diffuser residing within the housing. The stackable diffuser can have a diffuser side wall forming an annular gap between the outer surface of the diffuser side wall and the inner surface of the housing side wall. A filler can be provided within the annular gap to prevent recirculation and/or rotation of the diffuser within the housing. Additionally or alternatively, an O-ring can be disposed within the annular gap to prevent recirculation and/or rotation of the diffuser within the housing.

US Patent:

20170211582, Jul 27, 2017

Filed:

Aug 26, 2014

Appl. No.:

15/329159

Inventors:

- Houston TX, US
Dezhi Zheng - Spring TX, US
Mark Woodmansee - Houston TX, US
Mark Marcos Pina - Houston TX, US

International Classification:

F04D 29/22
F04D 29/44
F04D 1/06
F04D 29/66
F04D 13/10
E21B 43/12

Abstract:

In accordance with some embodiments of the present disclosure, a thrust washer and a diffuser for use in a downhole electrical submersible pump are disclosed. The pump may include a shaft and a motor communicatively coupled to the shaft. The motor may be operable to rotate the shaft. The pump may further include an impeller coupled to the shaft. The impeller may contain a balance ring, a balance hole, and a hub. The pump may further include a diffuser disposed adjacent to the impeller. The pump may further include a thrust washer coupled to the impeller. The thrust washer may be located between the balance ring and the hub without blocking the balance hole to allow fluid flow through the impeller and the diffuser. The pump may further include a discharge operable to direct fluid flow out of the multi-stage electrical submersible pump.

US Patent:

20170122332, May 4, 2017

Filed:

Jul 24, 2014

Appl. No.:

15/318399

Inventors:

- Houston TX, US
Dezhi Zheng - Houston TX, US

International Classification:

F04D 29/08
F04D 1/06
F04D 13/08
F04D 29/44
F04D 25/06
F04D 29/22
F04D 29/28
F04D 29/42
E21B 43/12
F04D 17/12

Abstract:

In accordance with embodiments of the present disclosure, a electrical submersible pump includes a pump housing, a shaft extending at least partially through the pump housing and adapted to be driven by a submersible motor, an impeller attached to the shaft and having an impeller passage for fluid to flow therethrough, and a diffuser that is stationary relative to the pump housing and having a diffuser passage, wherein the diffuser is disposed corresponding to the impeller to form a pump stage such that fluid can flow between the impeller passage and the diffuser passage. The electrical submersible pump also includes a labyrinth seal formed between the impeller and the diffuser, wherein the labyrinth seal selectively seals the impeller passage from a cavity formed between the impeller and the diffuser to maintain the impeller in a floating condition relative to the diffuser.

US Patent:

20160258441, Sep 8, 2016

Filed:

Oct 14, 2014

Appl. No.:

14/908376

Inventors:

- Houston TX, US
Dezhi Zheng - Spring TX, US

International Classification:

F04D 29/041
F04D 1/06
F04D 29/44
F04D 29/043
F04D 29/22
E21B 43/12
F04D 7/04

Abstract:

A multi-stage pump stack is disclosed herein wherein the multi-stage pump stack comprises a shaft, a diffuser disposed about the shaft, an impeller disposed within the diffuser, a first thrust ring disposed adjacent to the impeller, and a second thrust ring disposed adjacent to the diffuser. The first and second thrust rings are comprised of a material with a low friction coefficient. Systems and methods for distributing forces in the multi-stage pump stack are also disclosed herein.