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8182252 |
Progressing cavity pump with split stator
A progressing cavity pump system including a rotor and a stator having an inner cavity. The rotor is rotationally disposed inside the inner cavity of the stator such that rotation of the rotor...
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8152499 |
Eccentric screw pump
An eccentric screw pump with an annular outer part (10; 40; 74) and an inner part (12; 42; 72) arranged therein has an interior of the outer part (10; 40; 74) and an exterior of the inner part (12;...
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8147228 |
Progressing cavity pump/motor
A progressing cavity pump/motor includes a stator tube (12), a rotor (20) within the stator tube, and a coupling assembly (30) interconnecting the upper and lower rotor sections. The coupling...
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8133044 |
Positive displacement capture device and method of balancing positive displacement capture devices
A positive displacement capture apparatus contains a plurality of positive displacement capture devices which each contain a rotor portion positioned inside a casing portion to act as a least area...
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8109746 |
Progressing cavity pump/motor
A progressing cavity pump/motor includes an upper stator tube (14), a lower stator tube (16), a rotor (20) sitting between the upper and lower stator tubes, and a coupling assembly (30)...
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8083508 |
Progressive cavity compressor having check valves on the discharge endplate
A new type of progressive cavity compressor is intended primarily for 3 to 10 ton vapor-cycle air conditioning systems. Major working section elements include a rotor, a stator, inlet ports, an...
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8033802 |
Stator casing for eccentric worm pumps
The invention relates to a stator casing for eccentric worm pumps comprising an elastic lining, the cylindrical stator casing having a surface on the inner side, along the longitudinal axis whereof...
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8007259 |
Stator system
The invention relates to an eccentric screw pump and a method for its operation. Unlike the previously known prior art, where changes to the internal geometry of the pump stator caused by wear were...
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7950914 |
Braze or solder reinforced Moineau stator
A Moineau style stator includes a helical reinforcement component that provides an internal helical cavity. A resilient liner is deployed on an inner surface of the helical reinforcement component....
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7913663 |
Rotary piston machine
A rotary piston machine 10 includes an enclosure 12 having a cavity 14 therein with arcuate side walls 16a,b,c defining a plurality of arcuate recesses 18a,b,c and a piston member 20 rotationally...
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7909591 |
Eccentric screw pump equipped with erosion-resistant rotor
An eccentric screw pump or an eccentric screw motor has a rotor formed from at least a tubular jacket with at least two layers. The outer layer of the jacket consists of a material that is...
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7905714 |
Progressing cavity pump assembly and method of operation
A progressing cavity pump assembly includes a collar assembly connecting a housing and a tubing string, with the collar having an inside diameter upset and the rotor having a rotor head axially...
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7896628 |
Downhole motor seal and method
The rotor of a downhole motor includes a mandrel having at least one radial lobe, and an elastomeric tubular sleeve compressed about the mandrel so as to establish frictional engagement...
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7878774 |
Moineau stator including a skeletal reinforcement
A Moineau style stator includes a helical cavity component having reinforced helical lobes. The lobes are reinforced with a three-dimensional network of physically bonded aggregate particles. The...
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7871253 |
Stator clamping device for eccentric screw pump
The invention relates to a clamping device which clamps the pump stator with the pump housing and an additional pump end part. The width of the clamping bars is at least 20% of the cross section of...
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7837451 |
Non-contact seal for positive displacement capture device
A positive displacement capture device contains a rotor portion positioned inside a casing portion to act as a least area rotor which captures a volume and moves the volume along the length of the...
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7828533 |
Positive displacement motor/progressive cavity pump
Disclosed is a progressive cavity device. In some embodiments, the device includes a stator with an inner surface having a number of lobes and a rotor disposed within the stator and having a...
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7780428 |
Fluid-guiding and electric conducting system for suspended electric submersible progressing cavity pump (PCP)
A fluid-guiding and electric conducting system for a suspended electric submersible PCP comprises a fluid-guiding system and an electric conducting system. The fluid-guiding system comprises an...
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7726115 |
Axial flow positive displacement worm compressor
An axial flow positive displacement compressor has an inlet axially spaced apart and upstream from an outlet. Inner and outer bodies have offset inner and outer axes extend from the inlet to the...
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7707815 |
Axial flow positive displacement worm gas generator
An axial flow positive displacement engine has an inlet axially spaced apart and upstream from an outlet. Inner and outer bodies have offset inner and outer axes extend from the inlet to the outlet...
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7648052 |
Viscous medium feeder
A viscous medium feeder, which has an inlet, an outlet, a tubular portion, a rotatable cylindrical shaft arranged in and extending coaxially with the tubular portion, and a drive motor connected to...
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7618246 |
Eccentric screw pump having conical sealing surfaces
The aim of the invention is to improve the sealing possibilities between the elastic stator lining and corresponding connecting flanges of eccentric screw pumps. In order to increase the sealing...
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7600982 |
Compact helical compressor for mobile use in a vehicle
A compact helical compressor system for mobile use in vehicles is described. The system includes a helical compressor unit, a motor unit dedicated to the helical compressor unit for driving the...
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7578663 |
Combined pump with rotodynamic impeller
The combined pump is a novel pumping system for fluids (liquids, gases) and for multiple-phase mixtures. This combined pump comprises a helical rotor on which a rotodynamic impeller is mounted. The...
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7553139 |
Progressing cavity pump with wobble stator and magnetic drive
A progressing cavity pump including a drive component configured to be rotated by a motor and a driven component that is magnetically rotationally coupled to the drive component. The driven...
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7553138 |
Rotary screw machine of volume type and method of transforming a motion in a volume screw machine
The invention relates to a rotary screw machine of volume type comprising a body (30) having a main axis X, two members (10, 20), wherein a first one (20) surrounds a second one (10). Said first...
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7530217 |
Axial flow positive displacement gas generator with combustion extending into an expansion section
An axial flow positive displacement engine has an inlet axially spaced apart and upstream from an outlet. Inner and outer bodies have offset inner and outer axes extend from the inlet to the outlet...
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7517202 |
Multiple elastomer layer progressing cavity stators
A progressing cavity stator and a method for fabricating such a stator are disclosed. The progressing cavity stator includes first and second elastomer layers fabricated from corresponding first...
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7507076 |
Knockdown pump containment assembly apparatus and method
A knockdown pump containment assembly for supporting a stator that employs a rotor therein. The pump containment assembly comprises a removable pump housing that defines a containment chamber for...
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7473082 |
Pumping system with progressive cavity pump
Pumping system comprising: a progressive cavity pump comprising a helical rotor inside a helical cavity of an outer stator; motor for driving the rotor, with a motor shaft coaxial to the axis of...
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7465157 |
Compact eccentric screw pump
The invention relates to a compact eccentric screw pump including a sliding articulation. The long-lasting operation of the pump is ensured by a plurality of functions. According to the invention,...
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7442019 |
Stator of a moineau-pump
A Moineau stator includes a tube (10) having lobes (3) arranged in a configuration which is adapted to interact with a rotor and formed through a hydroforming process.
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7413416 |
Progressing cavity pump
This progressing cavity pump includes a helical rotor (2) mounted to turn inside a helical stator (3). The stator (3) and the rotor (2) are disposed such that the cavities (4) formed therebetween...
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7407372 |
Progressing cavity pump or motor
A progressing cavity pump or a motor includes, in one embodiment, an outer tube 12, an inner tube 14, and a plurality of apertures 16. A pair of annular seal glands 18 seal the stator material to...
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7396220 |
Progressing cavity stator including at least one cast longitudinal section
A progressing cavity stator and a method for fabricating such a stator are disclosed. Exemplary embodiments of the progressing cavity stator include a plurality of rigid longitudinal stator...
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7393695 |
Collider chamber apparatus and method of use of same
The disclosed apparatus includes a stator and a rotor disposed for rotation within the stator. An inner wall of the stator defines one or more collider chambers. Rotation of the rotor causes...
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7354258 |
Stator for an eccentric single-rotor screw pump and method for its production
Stator for an eccentric single-rotor screw pump has a casing made of steel or the like and a helical elastomer lining. Stator and a method for its production are described which can also be made...
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7270106 |
Free-planetary gear moderated nutating (athena) engine
In a nutating engine (or more generally a rotary displacement device) the cycling of combustion occurs between inner and outer spherical surfaces. The combustion chambers are additionally defined...
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7226279 |
Gerotor mechanism for a screw hydraulic machine
The invention relates to gerotor mechanisms for screw downhole motors used for drilling oil and gas wells, to screw pumps for producing oil and pumping fluids and to general purpose screw motors....
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7214042 |
Progressing cavity pump with dual material stator
A progressing cavity pump including a rotor and a stator having an inlet and an outlet. The rotor is rotationally disposed inside of the stator such that rotation of the rotor causes fluid in the...
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7201222 |
Method and apparatus for aligning rotor in stator of a rod driven well pump
A progressing cavity rod-driven well pump utilizes a tag shoulder above a helical passage of the stator. The pump stator is located at the lower end of a string of tubing. The tag shoulder is more...
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7192260 |
Progressive cavity pump/motor stator, and apparatus and method to manufacture same by electrochemical machining
Electrochemical machining is used to generate the helical lobe profiles of the stator of a progressive cavity pump or motor. A thin, elastomeric liner, of uniform thickness is bonded either to the...
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7137795 |
Stator for eccentric spiral pump
A stator for an eccentric spiral pump comprises a hollow body of an elastic material which has a casing comprising a plurality of segments extending in a longitudinal direction of the casing....
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7131827 |
Stator for an eccentric screw pump or an eccentric worm motor operating on the moineau principle
The invention relates to a stator for an eccentric screw pump or an eccentric worm motor, including an outer tube that is provided with a lining of rubber or a rubber-like material and has a hollow...
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7104770 |
Eccentric screw-type pump with spare stator
The present invention relates to the arrangement of a stator and a spare stator. In order to avoid a permanent correction in the length of the driving shaft, the spare stator is connected to the...
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7083401 |
Asymmetric contouring of elastomer liner on lobes in a Moineau style power section stator
The inventive stator includes a helical cavity component made from a material chosen to reinforce an elastomer liner deployed thereon. The contouring of the elastomer liner is asymmetrical, such...
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7074018 |
Direct drive linear flow blood pump
A ventricular assistive device (VAD) based on a progressive cavity pump includes a pump housing having an inlet and an outlet, a pump stator contained within the pump housing, a pump rotor...
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7040392 |
Bearing assembly for a progressive cavity pump and system for liquid lower zone disposal
A progressive cavity pump pumps liquid downhole to a lower formation past a packer set in a casing of a wellbore. The rotor of the pump is axially restrained by a bearing assembly spaced below the...
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7040878 |
Eccentric screw-type pump
An eccentric screw-type pump has a pump section with a tubular pump casing, a stator cladding and a pump cavity (30) configured in correspondence with a double-thread or multi-thread screw. A...
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6962489 |
Moineau pumping device having a ball coupling
A pumping device is provided which comprises a Moineau pump with a helical rotor inside a helical cavity of a stator, driver means, and a drive connecting rod coupled by a respective coupling to a...
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