Halliburton Energy Services, Inc.

Dezhi Zheng

Donn Jason Brown

Robert Charles De Long

Ketankumar Kantilal Sheth

Jeffrey G Frey

Hassan Mansir

Yuzhu Hu

Mitul M Patel

Jason Eugene Hill

Mark Allen Woodmansee

Mark Marcos Pina

Yu Dong Sun

Wenjie Jie Guang

Mark Woodmansee

In the drilling of oil and gas wells, some fluid isolation valves may be stuck in a closed position and may need to be milled out. Provided are methods and systems to dissipate heat and remove cuttings and shavings generated during milling of these fluid isolation barrier. The methods may include conveying a milling tool into a borehole, wherein the milling tool comprises a motor, a gear box coupled to the motor; a pump coupled to the gear box, and a mill bit coupled to the pump, milling a fluid isolation barrier positioned in the borehole using the milling tool, wherein heat is generated at the mill bit and by the motor during the milling of the fluid isolation barrier, and removing at least a portion of the heat by pumping fluid past the motor and the mill bit using the pump.

Motor cooling and debris management during milling

A downhole electric submersible pump (ESP) assembly. The downhole ESP assembly comprises a permanent magnet motor (PMM) comprising a first drive shaft, a stator, and a rotor disposed within the stator and comprising a core coupled to the first drive shaft, wherein the core retains a first permanent magnet element within a first magnet pocket defined by the core that extends axially parallel to the first drive shaft and retains a second permanent magnet element within a second magnet pocket defined by the core that extends axially parallel to the first drive shaft; a seal section having a second drive shaft coupled to the first drive shaft; and a pump assembly having a third drive shaft coupled to the second drive shaft.

Permanent magnet motor

An electric submersible pump (ESP) assembly. The ESP assembly comprises a first ESP component having a first drive shaft defining a plurality of male splines and defining at least one cut-out area; a second ESP component having a second drive shaft defining a plurality of male splines; a coupling shell defining a first plurality of female splines configured to mate with the male splines of the first drive shaft, a second plurality of female splines configured to mate with the male splines of the second drive shafts, and at least one shouldered aperture configured to align with the cut-out area of the first drive shaft; and at least one removable lug having a pin that is configured to extend through the shouldered aperture in the coupling shell to engage with the at least one cut-out area of the first drive shaft.

Electric submersible pump (ESP) assembly shaft coupling with axial load handling capability

Provided, in one aspect, is a spin control valve assembly, comprising a stationary valve plate having a first stationary valve plate opening and a second stationary valve plate opening; and a rotating valve plate coupled longitudinally adjacent to the stationary valve plate, the rotating valve plate having a rotating valve plate opening, wherein the rotating valve plate is configured to rotate among at least three positions such that at each position of the at least three positions fluid flows at a different flow rate through the spin control valve assembly.

Anti-spin control for an electric submersible pump permanent magnet motor

A downhole electric submersible pump (ESP) assembly. The downhole ESP assembly comprises a hybrid permanent magnet motor (PMM) comprising a first drive shaft, a stator, and a rotor comprising a first permanent magnet element, a second permanent magnet element, and an induction squirrel cage, wherein the rotor is mechanically coupled to the first drive shaft and disposed within the stator; a seal section having a second drive shaft coupled to the first drive shaft; and a pump assembly having a third drive shaft coupled to the second drive shaft.

Hybrid permanent magnet motor

An electric submersible pump (ESP) assembly comprises a centrifugal pump assembly, a seal section and an electric motor comprising a drive shaft having a bore concentric with a longitudinal axis of the drive shaft. A fluid mover disposed within and coupled to the bore of the drive shaft is configured for urging lubricating oil upward in the bore. The fluid mover includes at least one helical flighting open in the middle. The electric motor may also have a bearing coupled to the drive shaft and a bushing that is retained by a housing or by stator structure of the electric motor. The bushing defining at least one fluid flow channel extending from an upper edge of the bushing to a lower edge of the bushing and a middle portion of the fluid flow channel open to the inside surface of the bushing.

Oil transport structure in an electric motor of an electric submersible pump (ESP) assembly

An electric submersible pump (ESP) electric motor. The ESP electric motor comprises a housing; a stator retained within the housing; a drive shaft; and an at least one rotor mechanically coupled to the drive shaft and located concentric with and inside of the stator, wherein an inside surface of the stator defines a groove extending from an upper end to a lower end of the stator, an outside surface of the at least one rotor defines a groove extending from an upper end to a lower end of the at least one rotor, an inside surface of the at least one rotor defines a groove extending from an upper end to a lower end of the at least one rotor, or an outside surface of the drive shaft defines a groove extending from below an male splines at an upper end to a lower end of the drive shaft.

Oil circulation in an electric submersible pump (ESP) electric motor

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.

Abrasion-resistant thrust ring for use with a downhole electrical submersible pump

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.

Thrust washer and diffuser for use in a downhole electrical submersible pump

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.

Growing community of inventors

Spring, TX, United States of America

Dezhi Zheng