Halliburton Energy Services, Inc.

Joshua Wayne Webster

Wesley John Nowitzki

Jason Eugene Hill

Donn Jason Brown

Casey Laine Newport

Randy S Roberts

Thomas John Gottschalk

John Vanderstaay Kenner

Steven Andrew Lovell

Bryan Don Mullins

Justin Shrum

Wes John Nowitzki

Joseph Dean Butler

Casey Holden Bertram

Joe D Butler

A method of lifting fluid by an electrical submersible pump (ESP) assembly in a wellbore. The method comprises positioning a first ESP component above the wellbore, wherein the first ESP component comprises a first drive shaft; positioning a second ESP component above the first ESP component, wherein the second ESP component comprises a second drive shaft; coupling a tethering assembly at a first end to an end of the first drive shaft proximate to the first flange; passing the tethering assembly through a coupling shell; coupling a second end of the tethering assembly to an end of the second drive shaft proximate to the second flange, wherein the tethering assembly is coupled slidingly to the first drive shaft or to the second drive shaft; coupling the first drive shaft to the second drive shaft by the coupling shell; and coupling the first flange to the second flange.

Electric submersible pump (ESP) assembly shaft-to-shaft tethering

An electric submersible pump (ESP) assembly. The ESP assembly comprises an inverted shroud separating a centrifugal ESP pump from a well casing, the ESP pump rotatably coupled to an ESP motor, the inverted shroud having an opening on an upstream terminal side, the upstream terminal side terminating at a head of the ESP motor, at least a portion of the ESP motor extending through the opening, the portion of the ESP motor extending through the opening exposed to formation fluid, and the opening sealed to the formation fluid at the head of the ESP motor tapered and wedged to the inverted shroud, wherein a centerline of the inverted shroud is offset from a centerline of the ESP motor.

Electric submersible pump eccentric inverted shroud assembly

A diffuser anti-rotation system and apparatus is described. A diffuser anti-rotation system includes a circumferential coupling ring interlocked between a top of a first diffuser and a bottom of an adjacent diffuser. One end of the first diffuser includes at least one male register tab, the opposing end of the adjacent diffuser has at least one female register slot, and the coupling ring interlocks with the male register tab and the female register slot. One of the male register tabs and one of the female register slots are aligned axially and a single projection from the coupling ring interlocks with both the male register tab and the axially aligned female register slot. Impellers are mated with and rotating within each of the first diffuser and the adjacent diffuser, and the interlocked coupling ring prevents rotation of the first diffuser with respect to the adjacent diffuser.

Diffuser anti-rotation system and apparatus

A self-orienting gas evading intake for a submersible pump provides an efficient, reliable and inexpensive system for pumping a downhole fluid to a surface. An intake section of a submersible pumping system may comprise a blocker sleeve disposed between an external housing and an eccentric intake. The intake section may be self-orienting such that a gas component of the fluid ascends the borehole to separate from a liquid component of the fluid. Actuation of a blocker sleeve exposes one or more ports of the external housing while blocking one or more other ports. The liquid component is drawn into the intake section through an exposed port and through one or more openings of the eccentric intake. The liquid component may then be drawn into the pump. As the liquid component comprises non-detrimental amounts, if any, of a gas component, the pump operates efficiently and effectively.

Self-orienting gas evading intake for submersible pumps

A diffuser subassembly for use in downhole submersible pump assemblies includes a bearing set for supporting a drive shaft of the pump assemblies. The bearing set includes a sleeve for supporting the drive shaft in upward, downward and radial directions. The sleeve includes a central flange captured axially between a pair of bushings fixed to a diffuser body. Axial loads from the drive shaft may be transferred through the central flange of the sleeve to one or the other of the bushings into the diffuser body to accommodate upward and downward thrust forces. The bushings may be keyed to discourage rotational motion with respect to the diffuser body.

Diffuser assembly for upward, downward and radial pump protection

A method and apparatus for a centrifugal pump according to which an annular retainer is positioned around a first end portion of a pump shaft, an open end portion of a compression cylinder is positioned around the first end portion of the pump shaft so that the pump shaft extends within an internal cavity of the compression cylinder, the compression cylinder is moved towards an annular groove formed in the first end portion of the pump shaft, and the annular retainer is sprung into the annular groove. In some embodiments, springing the annular retainer into the annular groove constrains one or more impellers and one or more annular spacers between the annular retainer and another annular retainer connected to the pump shaft.

Impeller stack compression device and method

An electric pump may include a stack of diffusers including a first diffuser and a second diffuser. The first diffuser includes a recess therein defining an inner recess surface substantially circumscribing a primary diffuser axis. The second diffuser includes a lip projecting into the recess of the first diffuser. In response to a differential torque applied to the first and second diffusers about the primary diffuser axis, the lip of the second diffuser may engage the inner recess surface of the first diffuser, and thereby prevent relative rotation of the diffusers with respect to one another. An outer perimeter surface of the lip and the inner recess surface may define polygonal shapes or other non-circular profiles.

Anti-spin pump diffuser

A retaining ring anti-migration system and method. A retaining ring anti-migration system for a centrifugal pump shaft includes a pair of trap sleeves that enclose a pair of retaining rings, one retaining ring around each end of the shaft enclosed by one trap sleeve, the pair of retaining rings configured to bound axial migration of the shaft both upwards and downwards. A retaining ring anti-migration system includes a retaining ring seated in a shaft groove extending circumferentially around an electric submersible pump (ESP) shaft, a trap sleeve extending around the ESP shaft adjacent to the retaining ring, the trap sleeve including a sleeve body secured to the ESP shaft such that the trap sleeve rotates with the ESP shaft, and a jacket extending axially from the sleeve body over an outer diameter of the retaining ring with a clearance between the shaft and the jacket.

Retaining ring anti-migration system and method

A press-fit thrust bearing system and apparatus. A press-fit thrust bearing for an electric submersible pump includes a protruding band extending around a midsection of a bushing, the protruding band extending inward towards a drive shaft, outward towards a diffuser, or both. When extending outwardly, the band is press-fit into the diffuser to prevent dislodgment of the bushing. A non-rotating guide sleeve extends around the bushing above the protruding band, the guide sleeve interlocking with the protruding band to prevent rotation of the bushing. The guide sleeve includes a projection, the protruding band has a channel and the projection mates with the channel to form the interlock. A pair of flanged, rotatable bearing sleeves extend inwards of the single bushing and are keyed to the drive shaft. The top and bottom faces of the bushing serve as thrust handling surfaces.

Press-fit thrust bearing system and apparatus

A crossover of an electric submersible pump (ESP) gas separator. The crossover comprises a skirt defining a plurality of exits, passageways, and entrances, each exit associated with one of the passageways and one of the entrances, wherein each entrance is proximate to an inner chamber of the gas separator and a jacket circumferentially surrounding the skirt and defining a plurality of exits, wherein the rotational position of the jacket relative to the skirt is adjustable.

Crossover system and apparatus for an electric submersible gas separator

A bushing anti-rotation system and apparatus. A bushing anti-rotation system includes an impeller and diffuser stage including a rotatable shaft extending longitudinally through the stage, the diffuser having an inner diameter defining a bore, a bearing set including a bushing pressed into the inner diameter, and a rotatable sleeve inward of the bushing, and means for wedging the bushing against the inner diameter of the diffuser, wherein the means for wedging provides a mechanical lock against rotation of the bushing. The means for wedging the bushing against the diffuser includes one of a key wedged between an eccentric cavity in the diffuser and a notch in the bushing, a pin protruding from the diffuser against a flattened portion of the bushing, a square-shaped bushing secured into a square-shaped bore, a bent retaining ring having a bent end that wedges against a diffuser groove wall, or a combination thereof.

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Owasso, OK, United States of America

Joshua Wayne Webster