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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...
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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...
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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...
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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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7329106 |
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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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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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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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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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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6945755 |
Fluid controlled pumping system and method
A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity....
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6944935 |
Method of forming an optimized fiber reinforced liner on a rotor with a motor
A method of forming a rotor for a positive displacement motor. The method includes forming a liner that includes at least two resilient layers and at least one fiber layer, and the at least two...
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6907925 |
PC pump inlet backwash method and apparatus
A downhole moineau pump assembly includes a stator with a rotor extending through the stator. The rotor and stator sealingly engage each other at spaced intervals to form a series of annular...
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6905319 |
Stator for down hole drilling motor
An improved down hole drilling motor suitable for drilling applications. The down hole drilling motor comprising a stator disposed in the tubular housing. The stator includes an internal cavity...
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6881045 |
Progressive cavity pump/motor
A progressive cavity pump or motor, particularly suitable for hydrocarbon recovery operations, includes a rotor 20 and a stator 10 . Fluid pressure in cavities between the stator and the rotor...
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6877967 |
Eccentric single-rotor screw pump
The invention relates to an eccentric single-rotor screw pump ( 100 ) including a stator ( 102 ), and an eccentric screw ( 12 ) rotatably arranged within said stator ( 102 ) and which can be moved...
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6872061 |
Method for making a moineau stator and resulting stator
The invention concerns a Moineau type gear pump stator (1), comprising a stator cavity with global axial extension inside an elongated body, characterised in that the stator cavity is defined by a...
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6716008 |
Eccentric screw pump with expanded temperature range
An eccentric screw pump or motor which includes; stators ( 3 ) having an elastic flexible coatings ( 32 ) which forms a helical bore with teeth ( 37 ) and tooth gaps ( 38 ) and a rotor ( 4 )...
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6675902 |
Progressive cavity wellbore pump and method of use in artificial lift systems
An artificial lift system used to produce fluids from boreholes such as oil and gas wells. The system uses a progressive cavity (PC) downhole pump system which can be inserted into the borehole,...
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6666668 |
Stator with rigid retaining ring
On an eccentric screw pump or an eccentric screw motor, both the outer wall and the inner wall of the jacket ( 21 ) have a helicoid form. In order to stabilise the cross-sectional profile of the...
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6622381 |
Method of manipulating a pump
A method for removing a stator tube from a position about a rotor of a progressing cavity pump is provided. The apparatus includes an actuator assembly having a base and a piston which is...
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6604922 |
Optimized fiber reinforced liner material for positive displacement drilling motors
A method of forming a stator for a positive displacement motor. The method includes forming a liner that includes at least two resilient layers and at least one fiber layer, and the at least two...
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6604921 |
Optimized liner thickness for positive displacement drilling motors
A stator for a positive displacement motor including an external tube. The external tube includes an outer surface and an inner surface, and the inner surface includes at least two radially...
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6544015 |
Worm for an eccentric screw pump or a subsurface drilling motor
A rotor ( 4 ) for an eccentric screw pump or a subsurface drilling motor consists of a straight, essentially cylindrical core element ( 21 ), onto which a shell ( 22 ) is forged by a cold-forging...
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RE37995 |
Progressive cavity pump with flexible coupling
A progressive cavity pump located in a well and driven by a downhole electrical motor. A connector locates between the drive shaft of the motor and the rotor of the pump. The connector includes a...
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6461128 |
Progressive cavity helical device
A progressive cavity helical device which includes a stator with an internal helical cavity. A helical rotor operates within the internal helical cavity of the stator. The rotor has a mandrel of...
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6457958 |
Self compensating adjustable fit progressing cavity pump for oil-well applications with varying temperatures
The present invention provides an adjustable rotor and/or stator, so that the interference fit and/or clearance can be adjusted. The rotor and/or stator are tapered to provide a difference in fit...
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6439866 |
Downhole rotary motor with sealed thrust bearing assembly
A rotary device, such as a downhole motor, with a rotary wave seal assembly. The seal assembly is formed by a sinuous or non-linear circumferential gland or groove and an annular seal member, such...
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6427787 |
Drilling motor that operates pursuant to the Moineau principle for drilling deep holes
The drilling motor is provided that operates pursuant to the Moineau principle for drilling deep holes or wells in the ground. A helically extending rotor is disposed in a stator having a rigid...
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6425745 |
Surface treatment of helically-profiled rotors
A treatment jet or beam, e.g. from a high velocity oxygen-liquid fuel (HVOF) spray gun, has an axis intersecting the surface of a rotor at a given point. The rotor has a profile which progresses...
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