EP0922859A2 - Moineau pump - Google Patents

Moineau pump Download PDF

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Publication number
EP0922859A2
EP0922859A2 EP98121332A EP98121332A EP0922859A2 EP 0922859 A2 EP0922859 A2 EP 0922859A2 EP 98121332 A EP98121332 A EP 98121332A EP 98121332 A EP98121332 A EP 98121332A EP 0922859 A2 EP0922859 A2 EP 0922859A2
Authority
EP
European Patent Office
Prior art keywords
elastomer
jacket
stator
coiled
coat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98121332A
Other languages
German (de)
French (fr)
Other versions
EP0922859A3 (en
Inventor
Sebastian Jäger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Artemis Kautschuk und Kunststoff Technik GmbH
Original Assignee
Artemis Kautschuk und Kunststoff Technik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Artemis Kautschuk und Kunststoff Technik GmbH filed Critical Artemis Kautschuk und Kunststoff Technik GmbH
Publication of EP0922859A2 publication Critical patent/EP0922859A2/en
Publication of EP0922859A3 publication Critical patent/EP0922859A3/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49242—Screw or gear type, e.g., Moineau type

Definitions

  • the invention relates to a method for producing Elastomer stators, namely stators that are external have a metallic shell, one of the Elastomer-enclosed cavity at least essentially has the appropriate shape, essentially after Kind of a coiled tube is designed.
  • the invention relates also refer to those stators mentioned in which the Elastomer jacket by injecting an elastomer into a the coat and a core for the design of the Pump cavity containing shape is molded.
  • the invention has for its object the aforementioned Manufacturing process for elastomer stators too simplify without the serviceability of the pumps endanger.
  • Elastomer introduced into the mold in such a way that it only comes into contact with the coat, but not with it a firm connection is established. Accordingly, at the manufacture of stators from an unprepared unprepared shell body, for which there was still it is not even required after its manufacture to be cleaned from a stretched tubular body.
  • the elastomer can be specifically tailored to its requirements be selected in an eccentric screw pump; a Consideration of elastomer compounds that are easy to bind not applicable.
  • the invention is not to special designs of the Tied end portions of the metallic shell. However, it is preferably used in connection with such Coats used, in which the overall short End sections practically cylindrical or slightly are angled or bent radially inwards.
  • the hollow outer part 1 of the shape has a central one Position a core 2, the outside like a two-start thread is formed; a corresponding Shaping also has the inner surface 3 of the Outside part 1.
  • the shape becomes through to the top completed a lid 4, which also to bracket the core 2 serves at the upper end.
  • the stator is first in the mold a double helix, outside of the inner surface 3 of the External part 1 corresponding tube 5 made of steel inserted; this tube 5 is esp. at his Inner surface 5 'untreated, so practically so procure how it is made from a cylindrical tube occurs. Then in the Mold cavity, i.e. in the space between the Inner surface 5 'of the tube 5 and the outer surface of the Kernes 2 rubber injected due to its Composition and its nature neither with the core 2 still with the coiled tube 5 one Binding and therefore not in relation to a Rubber-metal binding is prepared or selected.
  • the stator is after curing or vulcanization completed. He can then easily and without Aftertreatment in the usual way in a pump frame to be built in.
  • Fig. 2 has a position within the Point cavity 6 located, simply coiled Recognize the rotor 7 of the pump. It can also be seen that the pump cavity 6 due to the shape of the tube 5 or of that Stator tube formed by a tube Enclosed rubber layer 8 of approximately the same wall thickness is.
  • This form fit can still according to FIGS. 3 and 4 be reinforced.
  • 3 for the tube 5 one, but preferably both ends a cylindrical End portion 9 provided, the diameter in essentially on the diameter of the largest Bulge of the tube 5 is.
  • the invention does not exclude that in the Production of the coiled tube 5, the ends of which e.g. processed by turning; in any case they are usually not necessary for one Elastomer-metal bond or rubber-metal bond necessary preparations for the adhesive surface, i.e. the Inner surface of the tube 5, since the aforementioned There is no need for a bond.

Abstract

An elastomer is injected into a mold (1,2) so that it only has contact with the helical shell (5) but does not have form an adherent joint with it. The shell is preferably an elongated helical tube without surface treatment.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Elastomerstatoren, und zwar solche Statoren, die aussen einen metallischen Mantel aufweisen, der eine dem vom Elastomer umschlossenen Hohlraum zumindest im wesentlichen entsprechende Gestalt aufweist, also im wesentlichen nach Art einer Rohrwendel gestaltet ist. Die Erfindung bezieht sich ferner auf solche vorerwähnten Statoren, bei denen der Elastomermantel durch Einspritzen eines Elastomers in eine den Mantel und einen Kern für die Gestaltung des Pumpenhohlraumes enthaltende Form abgeformt wird.The invention relates to a method for producing Elastomer stators, namely stators that are external have a metallic shell, one of the Elastomer-enclosed cavity at least essentially has the appropriate shape, essentially after Kind of a coiled tube is designed. The invention relates also refer to those stators mentioned in which the Elastomer jacket by injecting an elastomer into a the coat and a core for the design of the Pump cavity containing shape is molded.

Da Exzenterschneckenpumpen vorwiegend bei mit Fremdstoffen angereichertem oder gar breiigem Fördergut benutzt werden, ergibt sich bei Exzenterschneckenpumpen eine erhebliche mechanische Beanspruchung der den Pumpenhohlraum umschliessenden Elastomerauskleidung für den starren Mantel. Dadurch entsteht ein erheblicher Abrieb. Insgesamt wird die Elastomerauskleidung aber auch aufgrund der wendelförmigen Gestalt der Rotoren in Achsrichtung des Statormantels beansprucht. Aus diesen Gründen wird nach bekannten Vorschlägen die Elastomerauskleidung - meistens aus Gummi bestehend - festhaftend mit der Innenfläche des starren Mantels verbunden.As eccentric screw pumps mainly with foreign substances enriched or pulpy materials are used, there is a considerable amount with eccentric screw pumps mechanical stress on the pump cavity enclosing elastomer lining for the rigid Coat. This creates considerable abrasion. All in all the elastomer lining is also due to the helical shape of the rotors in the axial direction of the Stator jacket claimed. For these reasons, after known proposals the elastomer lining - mostly made of rubber - adheres firmly to the inside surface of the rigid coat connected.

Der Erfindung liegt die Aufgabe zugrunde, das vorerwähnte Herstellungsverfahren für Elastomerstatoren zu vereinfachen, ohne die Gebrauchstüchtigkeit der Pumpen zu gefährden.The invention has for its object the aforementioned Manufacturing process for elastomer stators too simplify without the serviceability of the pumps endanger.

Zur Lösung dieser Aufgabe wird erfindungsgemäss das Elastomer derart in die Form eingebracht, dass es lediglich mit dem Mantel in Berührung kommt, nicht jedoch mit diesem eine festhaftende Verbindung eingeht. Demgemäss wird bei der Statorenherstellung von einem unpräpariertem, unvorbereitetem Mantelkörper ausgegangen, für den es noch nicht einmal erforderlich ist, ihn nach seiner Herstellung aus einem gestreckt verlaufenden Rohrkörper zu reinigen. Ausserdem kann das Elastomer speziell auf seine Anforderung in einer Exzenterschneckenpumpe ausgewählt werden; eine Rücksichtnahme auf bindefreudige Elastomermischungen entfällt.To achieve this object, according to the invention Elastomer introduced into the mold in such a way that it only comes into contact with the coat, but not with it a firm connection is established. Accordingly, at the manufacture of stators from an unprepared unprepared shell body, for which there was still it is not even required after its manufacture to be cleaned from a stretched tubular body. In addition, the elastomer can be specifically tailored to its requirements be selected in an eccentric screw pump; a Consideration of elastomer compounds that are easy to bind not applicable.

Versuche haben gezeigt, dass nach dem erfindungsgemässen Verfahren erstellte Statoren - obwohl sie einer erheblichen Walkarbeit unterworfen waren - auch nach längerer Betriebszeit der zugehörigen Pumpe keine Schäden zeigten; auch die mit den erfindungsgemäss hergestellten Statoren ausgerüsteten Pumpen zeigten überraschenderweise keine Mängel gegenüber solchen Pumpen, bei denen die Elastomerauskleidung innen am wendelförmigen Mantel angehaftet war.Tests have shown that according to the invention Processors created stators - although they are significant Were subjected to flexing work - even after a long time Operating time of the associated pump showed no damage; also those with the stators produced according to the invention Equipped pumps surprisingly showed none Defects compared to pumps in which the Elastomer lining on the inside of the helical jacket was attached.

Die Erfindung ist nicht an besondere Gestaltungen der Endabschnitte des metallischen Mantels gebunden. Vorzugsweise wird sie aber in Verbindung mit solchen Mänteln benutzt, bei denen die insg. kurz gehaltenen Endabschnitte praktisch zylindrisch oder aber geringfügig radial nach innen abgewinkelt oder abgebogen sind.The invention is not to special designs of the Tied end portions of the metallic shell. However, it is preferably used in connection with such Coats used, in which the overall short End sections practically cylindrical or slightly are angled or bent radially inwards.

Weitere Einzelheiten der Erfindung werden anhand der Zeichnung erläutert, in der ein Ausführungsbeispiel für das erfindungsgemässe Verfahren und besondere Endabschnitte für die Statormäntel dargestellt sind. Es zeigen :

  • Fig. 1 einen senkrechten Schnitt durch eine Einspritzform zum Abformen von Statoren für Exzenterschneckenpumpen,
  • Fig. 2 einen in der Form gemäss Fig. 1 erstellten Stator zusammen mit einem Rotor im Querschnitt und
  • Fig. 3 und 4 je einen Endabschnitt eines Stators für eine Exzenterschneckenpumpe im Längsschnitt.
    • Further details of the invention will be explained with reference to the drawing, in which an embodiment for the method according to the invention and special end sections for the stator sleeves are shown. Show it :
  • 1 is a vertical section through an injection mold for molding stators for eccentric screw pumps,
  • Fig. 2 shows a stator created in the form of FIG. 1 together with a rotor in cross section and
  • 3 and 4 each have an end section of a stator for an eccentric screw pump in longitudinal section.

    • Das hohle Aussenteil 1 der Form hat in zentraler Stellung einen Kern 2, der aussen nach Art eines zweigängigen Gewindes geformt ist; eine entsprechende Formgebung weist auch die Innenfläche 3 des Aussenteils 1 auf. Nach oben hin wird die Form durch einen Deckel 4 abgeschlossen, der auch zu Halterung des Kerns 2 am oberen Ende dient.The hollow outer part 1 of the shape has a central one Position a core 2, the outside like a two-start thread is formed; a corresponding Shaping also has the inner surface 3 of the Outside part 1. The shape becomes through to the top completed a lid 4, which also to bracket the core 2 serves at the upper end.

    Es versteht sich, dass die Form gemäss Fig. 1 nur schematisch wiedergegeben ist und weitere Einzelheiten, so auch die Mittel aufweisen muss, die zum Einspritzen des Werkstoffes dienen.It goes without saying that the shape according to FIG. 1 only is shown schematically and others Details, so must also have the means that serve to inject the material.

    Zur Herstellung des Stators wird in die Form zunächst ein doppelt gewendeltes, aussen der Innenfläche 3 des Aussenteils 1 entsprechendes Rohr 5 aus Stahl eingelegt; dieses Rohr 5 ist insb. an seiner Innenfläche 5' unbehandelt, also praktisch so beschaffen, wie es nach seiner Fertigung aus einem zylindrischen Rohr anfällt. Alsdann wird in den Formenhohlraum, also in den Raum zwischen der Innenfläche 5' des Rohres 5 und der Aussenfläche des Kernes 2 Kautschuk eingespritzt, der aufgrund seiner Zusammensetzung und seiner Beschaffenheit weder mit dem Kern 2 noch mit dem gewendelten Rohr 5 eine Bindung eingeht und somit auch nicht in Bezug auf eine Gummi-Metall-Bindung vorbereitet oder ausgewählt ist.To manufacture the stator is first in the mold a double helix, outside of the inner surface 3 of the External part 1 corresponding tube 5 made of steel inserted; this tube 5 is esp. at his Inner surface 5 'untreated, so practically so procure how it is made from a cylindrical tube occurs. Then in the Mold cavity, i.e. in the space between the Inner surface 5 'of the tube 5 and the outer surface of the Kernes 2 rubber injected due to its Composition and its nature neither with the core 2 still with the coiled tube 5 one Binding and therefore not in relation to a Rubber-metal binding is prepared or selected.

    Nach der Aushärtung bzw. Vulkanisation ist der Stator fertiggestellt. Er kann dann ohne weiteres und ohne Nachbehandlung in üblicher Weise in ein Pumpengestell eingebaut werden.The stator is after curing or vulcanization completed. He can then easily and without Aftertreatment in the usual way in a pump frame to be built in.

    Fig. 2 lässt eine Stellung eines innerhalb des Punmpenhohlraumes 6 befindlichen, einfach gewendelten Rotors 7 der Pumpe erkennen. Erkennbar ist ferner, dass bei der fertigen Pumpe der Pumpenhohlraum 6 aufgrund der Gestalt des Rohres 5 bzw. des von dem Rohr gebildeten Mantels des Stators von einer Gummischicht 8 etwa gleicher Wandstärke umschlossen ist.Fig. 2 has a position within the Point cavity 6 located, simply coiled Recognize the rotor 7 of the pump. It can also be seen that the pump cavity 6 due to the shape of the tube 5 or of that Stator tube formed by a tube Enclosed rubber layer 8 of approximately the same wall thickness is.

    Obwohl die Gummischicht 8 nicht angehaftet ist, erfährt sie aufgrund der Formschlüssigkeit zwischen der Aussenfläche de Gummischicht 8 und dem Rohr 5 keine unerwünschte Lageveränderung.Although the rubber layer 8 is not attached, it experiences because of the form fit between the outer surface of the rubber layer 8 and the tube 5 no unwanted change of position.

    Dieser Formschluss kann gemäss Fig. 3 und 4 noch verstärkt werden. Dazu ist gemäss Fig. 3 für das Rohr 5 ein-, vorzugsweise aber beidendig ein zylindrischer Endabschnitt 9 vorgesehen, dessen Durchmesser im wesentlichen auf dem Durchmesser der grössten Ausbuchtung des Rohres 5 liegt. Bei der Ausführung gemäss Fig. 4 kann im Anschluss an einen Endabschnitt 9 oder unmittelbar im Anschluss an die Wendelgestalt ein Endabschnitt 10 folgen, der radial nach innen abgewinkelt - oder wie dargestellt - abgebogen ist. Auch hierdurch wird der Formschluss verbessert.This form fit can still according to FIGS. 3 and 4 be reinforced. 3 for the tube 5 one, but preferably both ends a cylindrical End portion 9 provided, the diameter in essentially on the diameter of the largest Bulge of the tube 5 is. When executing 4 can follow an end section 9 or immediately after the spiral shape an end portion 10 follow that radially inward angled - or bent as shown. This also improves the form fit.

    Die Erfindung schliesst nicht aus, dass bei der Herstellung des gewendelten Rohres 5 dessen Enden z.B. durch Abdrehen bearbeitet werden; in jedem Falle erübrigen sich aber die normalerweise für eine Elastomer-Metall-Bindung bzw. Gummi-Metall-Bindung erforderlichen Vorbereitungen der Haftfläche, also der Innenfläche des Rohres 5, da sich die vorerwähnte Bindung erübrigt.The invention does not exclude that in the Production of the coiled tube 5, the ends of which e.g. processed by turning; in any case they are usually not necessary for one Elastomer-metal bond or rubber-metal bond necessary preparations for the adhesive surface, i.e. the Inner surface of the tube 5, since the aforementioned There is no need for a bond.

    Claims (6)

    Verfahren zur Herstellung von Elastomerstatoren, die aussen einen metallischen, der Gestalt des Pumpenhohlraumes entsprechenden, gewendelten Mantel aufweisen, wobei die Elastomerauskleidung des Mantels durch Einspritzen des Elastomers in einer Form erzeugt wird, in der sich der gewendelte Mantel befindet, dadurch gekennzeichnet, dass das Elastomer derart in die Form eingebracht wird, dass es lediglich mit dem Mantel in Berührung kommt, nicht jedoch mit diesem eine festhaftende Verbindung eingeht.Process for the production of elastomer stators, the outside a metallic, the shape of the Pump cavity corresponding spiral jacket have, the elastomer lining of the jacket generated by injecting the elastomer in a mold in which the coiled coat is characterized in that the elastomer in the form is introduced so that it is only with the Coat comes in contact, but not with this a firm connection is established. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der aus einem gestreckten Rohr geformte, gewendelte Mantel ohne Zwischenbehandlung in Bezug auf seine Oberfläche, insb. seiner Innenfläche in eine Form eingesetzt wird.A method according to claim 1, characterized in that the one formed from an elongated tube, coiled coat with no intermediate treatment regarding its surface, especially its inner surface in one Form is used. Stator für Exzenterschneckenpumpen, hergestellt nach dem Verfahren gemäss Anspruch 1, dadurch gekennzeichnet, dass die Elastomerauskleidung (8) des Stators aussen unter Verzicht auf eine Bindung lediglich an dem gewendelten Mantel (5) anliegt.Stator for progressing cavity pumps, manufactured according to the method of claim 1, characterized characterized in that the elastomer lining (8) of the Stator outside without a binding only rests on the coiled jacket (5). Stator nach Anspruch 3, dadurch gekennzeichnet, dass der Mantel (5) ein- oder beidendig einen praktisch zylindrischen Endabschnitt (9) aufweist. Stator according to claim 3, characterized in that the jacket (5) has one or both ends has practically cylindrical end portion (9). Stator nach Anspruch 4, dadurch gekennzeichnet, dass der Durchmesser des zylindrischen Endabschnittes (9) zumindest im wesentlichen dem Durchmesser (D) des Mantels (5) im Bereich seiner Ausbuchtungen entspricht.Stator according to claim 4, characterized in that the diameter of the cylindrical end portion (9) at least substantially the diameter (D) of the Mantels (5) in the area of its bulges corresponds. Stator nach Anspruch 4 und ggfs. Anspruch 5, dadurch gekennzeichnet, dass der Mantel (5) ein- oder beidendig radial nach innen abgewinkelt oder abgebogen ist ( Fig. 4 ).Stator according to claim 4 and possibly claim 5, characterized in that the jacket (5) on or angled or bent radially inwards at both ends is (Fig. 4).
    EP98121332A 1997-12-10 1998-11-10 Moineau pump Withdrawn EP0922859A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19754818 1997-12-10
    DE19754818A DE19754818A1 (en) 1997-12-10 1997-12-10 Process for the production of elastomer stators for eccentric screw pumps

    Publications (2)

    Publication Number Publication Date
    EP0922859A2 true EP0922859A2 (en) 1999-06-16
    EP0922859A3 EP0922859A3 (en) 2000-05-17

    Family

    ID=7851399

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98121332A Withdrawn EP0922859A3 (en) 1997-12-10 1998-11-10 Moineau pump

    Country Status (4)

    Country Link
    US (1) US6158988A (en)
    EP (1) EP0922859A3 (en)
    CA (1) CA2255376A1 (en)
    DE (1) DE19754818A1 (en)

    Families Citing this family (12)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US6309195B1 (en) * 1998-06-05 2001-10-30 Halliburton Energy Services, Inc. Internally profiled stator tube
    FR2794498B1 (en) * 1999-06-07 2001-06-29 Inst Francais Du Petrole PROGRESSIVE CAVITY PUMP WITH COMPOSITE STATOR AND MANUFACTURING METHOD THEREOF
    US6604921B1 (en) 2002-01-24 2003-08-12 Schlumberger Technology Corporation Optimized liner thickness for positive displacement drilling motors
    US6604922B1 (en) * 2002-03-14 2003-08-12 Schlumberger Technology Corporation Optimized fiber reinforced liner material for positive displacement drilling motors
    US6881045B2 (en) * 2003-06-19 2005-04-19 Robbins & Myers Energy Systems, L.P. Progressive cavity pump/motor
    US20050285305A1 (en) * 2004-06-24 2005-12-29 Baker Hughes Incorporated Method of molding progressive cavity pump stators
    US8636485B2 (en) 2007-01-24 2014-01-28 Halliburton Energy Services, Inc. Electroformed stator tube for a progressing cavity apparatus
    DE102010000923A1 (en) * 2010-01-14 2011-07-21 F-E-T Feltz-Elastomer-Technologie GmbH, 31737 Stator for an eccentric screw pump
    EP2964951A4 (en) * 2013-03-05 2016-10-26 Services Petroliers Schlumberger Method and apparatus to manufacture a progressive cavity motor or pump
    US9133841B2 (en) 2013-04-11 2015-09-15 Cameron International Corporation Progressing cavity stator with metal plates having apertures with englarged ends
    US9610611B2 (en) 2014-02-12 2017-04-04 Baker Hughes Incorporated Method of lining an inner surface of a tubular and system for doing same
    US11148327B2 (en) 2018-03-29 2021-10-19 Baker Hughes, A Ge Company, Llc Method for forming a mud motor stator

    Family Cites Families (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3499389A (en) * 1967-04-19 1970-03-10 Seeberger Kg Worm pump
    DE2722623A1 (en) * 1976-05-21 1977-12-08 Mono Pumps Ltd Stator for an eccentric screw pump or motor - given a form fitting protective plastic lining
    DE3229446A1 (en) * 1982-08-06 1984-02-09 Resch, Maschinen- und Gerätebau GmbH, 8266 Töging Pump stator
    DE3826033A1 (en) * 1988-07-30 1990-02-01 Gummi Jaeger Kg Gmbh & Cie METHOD FOR PRODUCING ELASTOMER STATORS FOR Eccentric Screw Pumps
    DE4006339C2 (en) * 1990-03-01 1994-08-04 Gd Anker Gmbh & Co Kg Stator for an eccentric screw pump
    DE4134853C1 (en) * 1991-05-22 1992-11-12 Netzsch-Mohnopumpen Gmbh, 8264 Waldkraiburg, De
    US5171139A (en) * 1991-11-26 1992-12-15 Smith International, Inc. Moineau motor with conduits through the stator
    US5759019A (en) * 1994-02-14 1998-06-02 Steven M. Wood Progressive cavity pumps using composite materials

    Non-Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Title
    None

    Also Published As

    Publication number Publication date
    US6158988A (en) 2000-12-12
    DE19754818A1 (en) 1999-06-17
    EP0922859A3 (en) 2000-05-17
    CA2255376A1 (en) 1999-06-10

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